JP4203233B2

JP4203233B2 - Water structure

Info

Publication number: JP4203233B2
Application number: JP2001178567A
Authority: JP
Inventors: 光一佐藤
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2001-06-13
Filing date: 2001-06-13
Publication date: 2008-12-24
Anticipated expiration: 2021-06-13
Also published as: JP2002371531A

Description

【０００１】
【発明の属する技術分野】
本発明は、港湾、漁港、海岸等の水域に設ける二列の壁体からなる水域構造物に関する。
【０００２】
【従来の技術】
従来、港湾、漁港等の水域に設ける二重壁構造物は、鋼矢板または鋼管矢板等の壁体構成部材をその継手を嵌合させながら水底地盤に打設することにより、連続壁を所定の間隔を隔てて２列構築し、この２列の連続壁の頭部をタイ材により連結した後、２列の連続壁の間に中詰土砂を充填し、その後上部工を施工することにより構築されていた。連続壁の頭部の連結方法には、タイ材結合方式と頂版結合方式の２通りがある。
【０００３】
【発明が解決しようとする課題】
前述のように、従来の港湾、漁港等の水域に設ける二重壁構造物にあっては、中詰土砂は二重壁の天端近傍まで充填されるのが常識であり、上部に中空室は設けられていない。これは、上部に中空室を設けた場合の設計法がないことにも起因しているものと考えられる。
【０００４】
一方、地震時において中詰土砂に作用する慣性力は中詰土砂の全質量に比例する。このため、従来の二重壁構造物では、（ａ）地震時において、壁体には水平方向から大きな土圧（慣性力）が作用し、また、これに伴い、構造体全体には大きな回転力が作用し、基礎地盤に大きな負荷を与える。また、（ｂ）水平外力に対して中詰土砂のせん断抵抗により抵抗するという構造特性から、中詰土砂のせん断抵抗が発現されるまでの間に、天端水平変位等水平方向の変形が大きくなるという問題があった。
【０００５】
（ａ）の問題に対しては、下記の対策が取られていた。
１）壁体に大きな剛性を有する部材を使用する。
２）内部摩擦角の大きな礫材を中詰土砂として使用し、中詰土砂によるせん断抵抗を大きくする。
３）頂版結合タイプの場合、壁体に発生する軸方向力を低減させるために壁体幅（中詰土砂の幅）を大きくする。
【０００６】
前記１）の対策の場合、大断面の壁体構成部材が必要になり、部材の製作・輸送や施工等に支障をきたすといった問題があった。前記２）の対策法の場合、礫材が高価なため経済性に支障をきたすという問題があった。前記３）の対策法の場合、壁体の間隔を大きくすると、中詰土砂の幅も大きくなるため、中詰土砂に作用する地震時慣性力も大きくなり、設計震度によっては壁体幅が求まらないといった設計上の問題があった。
【０００７】
（ｂ）の問題に対しては、具体的な対策法がなかった。このため、壁体の間隔（中詰土砂の幅）や壁体構成部材の断面をあまり大きくしなくてすみ、かつ変形を制御できる設計の自由度の高い二重壁構造物の開発が望まれていた。
【０００８】
さらに、前記従来の二重壁構造物は、鋼矢板または鋼管矢板の継手が上部工の内部にまで伸びていて、前後の連続壁には海水が透過するときに、消波効果を発揮する通水用スリット等が存在しない不透過構造であった。さらに、消波効果を発現するのに必要な遊水室の役割を果たす中空室も有していないため、消波効果を発揮できず、反射波高を低減できないという問題があった。また、不透過構造のため、構造物本体からの海水の透過がなく、堤内水質の悪化をもたらすという問題があった。このため、消波機能や海水の透過機能を有する二重壁構造物の開発が望まれていた。
【０００９】
本発明は、壁体構成部材における継手の取り付け範囲の工夫、中詰土砂の天端高さ設定の工夫、付加部材の配置などを組み合わせることで、前記の問題を解決したものである。
【００１０】
【課題を解決するための手段】
従来の問題点を解決するために、本発明の水域構造物は次のように構成する。
【００１１】
請求項１に係る水域構造物は、所定個所に第１の継手（１ａ）、第２の継手（１ｂ）を備えた多数の第１の壁体構成部材（２）を、前記第１の継手（１ａ）、第２の継手（１ｂ）を嵌合させて基礎地盤（２０）に打設等の手段により配置して第１の壁体（４）を構成し、前記第１の壁体（４）に対向して所定間隔を隔てた位置において、所定個所に第３の継手（５ａ）、第４の継手（５ｂ）を備えた多数の第２の壁体構成部材（６）を、前記第３の継手（５ａ）、第４の継手（５ｂ）を嵌合させて基礎地盤（２０）に打設等の手段により配置して第２の壁体（８）を構成し、前記第１の壁体構成部材（２）の頭部が第１の構造物延長方向連結材（９）により連結され、前記第２の壁体構成部材（６）の頭部が第２の構造物延長方向連結材（１０）により連結され、前記第１の壁体（４）と前記第２の壁体（８）の頭部が断面方向連結材（１１）により連結され、前記第１の構造物延長方向連結材（９）と前記断面方向連結材（１１）との交差部含むように第１の上方結合部（Ａ）が形成され、前記第２の構造物延長方向連結材（１０）と前記断面方向連結材（１１）との交差部を含むように第２の上方結合部（Ｂ）が形成され、第１の壁体（４）と第２の壁体（８）の間に水底面を中空室下面（２５ａ）とする中空室（２５）を設け、水底面（１３）から断面方向連結材（１１）の下面までの所定箇所に第１の通水用スリット（３）を形成した透過壁体（４ｂ）を構成し、前記第１の通水用スリット（３）の幅をＤ１とし、かつ第２の壁体構成部材（６）の配置間隔をＤ２としたとき、Ｄ１／Ｄ２は、５〜３５％に設定され、前記断面方向連結材（１１）の下面に１個ないし複数の消波突起（１４）が設けられていることを特徴とする。
【００１２】
請求項２に係る水域構造物は、請求項１記載の発明において、前記消波突起（１４）は、複数設けるときにおいて、前後方向に長さを階段状に変化させてなることを特徴とする。
【００１３】
請求項３に係る水域構造物は、所定個所に第１の継手（１ａ）、第２の継手（１ｂ）を備えた多数の第１の壁体構成部材（２）を、前記第１の継手（１ａ）、第２の継手（１ｂ）を嵌合させて基礎地盤（２０）に打設等の手段により配置して第１の壁体（４）を構成し、前記第１の壁体（４）に対向して所定間隔を隔てた位置において、所定個所に第３の継手（５ａ）、第４の継手（５ｂ）を備えた多数の第２の壁体構成部材（６）を、前記第３の継手（５ａ）、第４の継手（５ｂ）を嵌合させて基礎地盤（２０）に打設等の手段により配置して第２の壁体（８）を構成し、前記第１の壁体構成部材（２）の頭部が第１の構造物延長方向連結材（９）により連結され、前記第２の壁体構成部材（６）の頭部が第２の構造物延長方向連結材（１０）により連結され、前記第１の壁体（４）と前記第２の壁体（８）の頭部が断面方向連結材（１１）により連結され、前記第１の構造物延長方向連結材（９）と前記断面方向連結材（１１）との交差部含むように第１の上方結合部（Ａ）が形成され、前記第２の構造物延長方向連結材（１０）と前記断面方向連結材（１１）との交差部を含むように第２の上方結合部（Ｂ）が形成され、第１の壁体（４）と第２の壁体（８）の間に水底面を中空室下面（２５ａ）とする中空室（２５）を設け、水底面（１３）から断面方向連結材（１１）の下面までの所定箇所に第１の通水用スリット（３）を形成した透過壁体（４ｂ）を構成し、前記第１の通水用スリット（３）の幅をＤ１とし、かつ第２の壁体構成部材（６）の配置間隔をＤ２としたとき、Ｄ１／Ｄ２は、５〜３５％に設定され、前記断面方向連結材 ( １１ ) の下面に前方が高く後方が低い消波用段部（１５）が設けられていることを特徴とする。
【００１４】
請求項４に係る水域構造物は、請求項３記載の発明において、前記消波用段部（１５）は、複数設けるときにおいて前後方向に長さを階段状に変化させてなり、及び／又は前記断面方向連結材（１１）の上面にも前記消波用段部と逆向きの消波用段部（１５ａ）を階段状に設けて親水機能を付与することを特徴とする。
【００１５】
請求項５に係る水域構造物は、請求項１〜４のうち何れか１項記載の発明において、第３の継手（５ａ）、第４の継手（５ｂ）が水底面下の所定位置から第２の構造物延長方向連結材（１０）の内部まで連続して嵌合状態で配置され、不透過壁体（８ａ）を構成していることを特徴とする。
【００１６】
請求項６に係る水域構造物は、請求項１〜４のうち何れか１項記載の発明において、第３の継手（５ａ）、第４の継手（５ｂ）が水底面下の所定位置から水面下の所定位置まで連続して嵌合状態で配置され、第３の継手（５ａ）、第４の継手（５ｂ）の上方部に第２の通水用スリット（７）を形成した透過壁体（８ｂ）を構成していることを特徴とする。
【００１７】
請求項７に係る水域構造物は、請求項１又は３記載の発明において、前記第１の通水用スリット（３）が水没しているような構成とされ、又は第１の継手（１ａ）、第２の継手（１ｂ）が海水面（１７）と水底面（１３）との間に設けられてなることを特徴とする。
【００１８】
請求項８に係る水域構造物は、請求項１〜４のうち何れか１項記載の発明において、水底面と第２の構造物延長方向連結材（１０）の下面の間の所定位置において、第２の通水用スリット（７）を形成した透過壁体（８ｂ）を構成したことを特徴とする。
【００１９】
請求項９に係る水域構造物は、請求項１〜８のうち何れか１項記載の発明において、断面方向において少なくとも１本の柱状部材（２７）が第１の壁体（４）と第２の壁体（８）の中間部の基礎地盤（２０）に打設等の手段により配置され、前記柱状部材（２７）の頭部が少なくとも断面方向連結材（１１）と連結されていることを特徴とする。
【００２０】
請求項１０に係る水域構造物は、請求項１〜９のうち何れか１項記載の発明において、第１の壁体（４）と第２の壁体（８）の間の中空室（２５）には中詰材料（２１）が所定高さまで充填されて中空室下部層（２２）が構成され、中詰材料（２１）の第１の壁体（４）の側の天端高さは嵌合された第１の継手（１ａ）、第２の継手（１ｂ）の天端高さよりも低く、中詰材料（２１）の第２の壁体（８）の側の天端高さは嵌合された第３の継手（５ａ）、第４の継手（５ｂ）の天端高さよりも低いことを特徴とする。
【００２１】
請求項１１に係る水域構造物は、請求項１０に記載の発明において、中空室下部層（２２）の表面が水平面や斜面またはその組み合わせなどの任意の形状であることを特徴とする。
【００２２】
請求項１２に係る水域構造物は、請求項１０に記載の発明において、中空室下部層（２２）の表面に表面保護層（２６）が設置されていることを特徴とする。
【００２３】
請求項１３に係る水域構造物は、請求項９に記載の発明において、柱状部材（２７）の中間部に１個の鞘管（２９）が外挿され、前記鞘管（２９）には、少なくとも１本の第１の斜材（３１ａ）の下端部が連結され、前記第１の斜材（３１ａ）の上端部は第２の上方結合部（Ｂ）に連結され、前記鞘管（２９）と前記柱状部材（２７）の間の空隙部にはモルタル等の経時硬化性材料（３３）が充填されていることを特徴とする。
【００２４】
請求項１４に係る水域構造物は、請求項９に記載の発明において、柱状部材（２７）の中間部に少なくとも１個の鞘管（２９）が外挿され、前記鞘管（２９）の一方の側面には第１の斜材（３１ａ）の下端部が連結され、前記第１の斜材（３１ａ）の上端部は第２の上方結合部（Ｂ）に連結され、前記鞘管（２９）の他方の側面には第２の斜材（３１ｂ）の下端部が連結され、前記第２の斜材（３１ｂ）の上端部は第１の上方結合部（Ａ）に連結され、前記鞘管（２９）と前記柱状部材（２７）の間の空隙部にはモルタル等の経時硬化性材料（３３）が充填されていることを特徴とする。
【００２５】
請求項１５に係る水域構造物は、請求項９に記載の発明において、柱状部材（２７）の中間部に少なくとも２個の鞘管（２９ａ）および鞘管（２９ｂ）が外挿され、下側に配置される鞘管（２９ａ）の側面には第１の斜材（３１ａ）の下端部が連結され、前記第１の斜材（３１ａ）の上端部は第２の上方結合部（Ｂ）に連結され、前記鞘管（２９ａ）上側に配置される鞘管（２９ｂ）の他方の側面には第２の斜材（３１ｂ）の下端部が連結され、前記第２の斜材（３１ｂ）の上端部は第１の上方結合部（Ａ）に連結され、前記鞘管（２９ａ）および鞘管（２９ｂ）と前記柱状部材（２７）の間の空隙部にはモルタル等の経時硬化性材料（３３）が充填されていることを特徴とする。
【００２６】
請求項１６に係る水域構造物は、請求項１３〜１５の何れか１項に記載の発明において、鞘管（２９）が基礎地盤（２０）の上面と断面方向連結材（１１）の下面の間の所定位置に配置されていることを特徴とする。
【００２７】
請求項１７に係る水域構造物は、請求項９に記載の発明において、柱状部材（２７）の所定範囲において、消波用突設体（４０）が設けられていることを特徴とする。
【００２８】
請求項１８に係る水域構造物は、請求項９〜１７の何れか１項に記載の発明において、第１の斜材（３１ａ）および第２の斜材（３１ｂ）、あるいは第１の斜材（３１ａ）または第２の斜材（３１ｂ）の所定範囲において、消波用突設体（４０）が設けられていることを特徴とする。
【００２９】
請求項１９に係る水域構造物は、請求項１〜１８の何れか１項に記載の発明において、第１の壁体構成部材（２）および第２の壁体構成部材（６）が鋼管矢板であることを特徴とする。
【００３０】
請求項２０に係る水域構造物は、請求項５記載の発明において、不透過壁体（８ａ）を構成する壁体構成部材が鋼矢板であることを特徴とする。
【００３１】
請求項２１に係る水域構造物は、請求項９記載の発明において、柱状部材（２７）が鋼管杭であることを特徴とする。
【００３２】
請求項２２に係る水域構造物は、請求項１〜２１の何れか１項に記載の発明において、第２の壁体（８）の背後に、適宜高さまで裏込材（２８）が配置されていることを特徴とする。
【００３５】
【作用】
本発明によると、二重壁構造物において、２列の壁体間に中空室を設けたことにより地震時慣性力を低減することができる。このため、従来の二重壁構造物のように、地震時における中詰土砂に作用する慣性力で壁体に大きな土圧が作用したり、構造全体に大きな回転力が作用することがない。したがって、壁体に大きな剛性を有する部材を使用したり、壁体の間隔を大きくして中詰土砂によるせん断抵抗を大きくして対応したりする必要がなく、建設コストを低減できる。
【００３６】
さらに、本発明では、一方または両方の連続壁の所定位置に通水用スリットを設けることにより、反射波対策機能や海水循環機能を付与することができる。
【００３７】
さらに、本発明では、二重壁構造物の連続壁を、海水が透過できる通水用スリット等がある透過構造にした場合は、消波効果を発現するのに必要な遊水室の役割を果たす中空室を有しているため、消波効果を発揮でき、反射波高を低減できると共に、海水を透過させることもできるので、堤内水質の悪化を防止することも可能である。
【００３８】
特に、本発明では、柱状部材と斜材を配置することにより、大深度・高波浪域等波浪条件や地震に伴う慣性力や動水圧といった地震時荷重条件の厳しい個所で要求される水平方向の耐荷機能（耐荷力、変形性能）を確保することができる。
【００３９】
また、柱状部材や斜材の本数や部材剛性を増減することにより、構造物としての水平方向の耐荷機能（耐荷力、変形性能）を調整・確保できる。
【００４０】
さらに、２列の壁体の間隔や中空室下部層の高さ・形状を変化させることにより、中詰土砂に作用する慣性力や消波機能を調整できる。
【００４１】
【発明の実施の形態】
次に本発明を図示の実施形態に基づいて詳細に説明する。
【００４２】
図１、図２は、第１実施形態に係る水域構造物を示すものであって、下側の所定個所に、Ｔ字状の鋼製継手１と嵌合溝１８を有する鋼製パイプからなる継手１ａ、１ｂを備えた鋼管矢板からなる多数の壁体構成部材２を、前記各継手１ａ、１ｂを相互に噛み合わせた状態で、水中における基礎地盤２０に打設して、上側に通水用スリット３を有する壁体４を構成する。上側の通水用スリット３は、継手１ａ、１ｂの上端（イ）を壁体構成部材２の頭部が連結される構造物延長方向連結材９の下面（ロ）よりも所定寸法Ｌだけ下げることで、鋼管矢板本体の間に形成される。
【００４３】
前記壁体４に対向して所定間隔を隔てた位置において、下側の所定個所に、Ｔ字状の鋼製継手１と嵌合溝１８を有する鋼製パイプからなる継手５ａ、５ｂを備えた鋼管矢板からなる多数の壁体構成部材６を、前記継手５ａ、５ｂを相互に噛み合わせた状態で、水中における基礎地盤２０に打設して、上側に通水用スリット７を有する壁体８を構成する。上側の通水用スリット７は、継手５ａ、５ｂの上端（イ）を壁体構成部材６の頭部が連結される構造物延長方向連結材１０の下面（ロ）よりも所定寸法Ｌ₁だけ下げることで、鋼管矢板本体の間に形成する。左右の構造物延長方向連結材９、１０の間は、断面方向連結材１１により連結され、これら３つの連結材９、１０、１１により所定巾で長手方向に延長するコンクリート製上部工１２が構築される。
【００４４】
通水用スリット３、７は、各壁体構成部材２、６を繋ぐ全ての継手１ａ、１ｂ、５ａ、５ｂに設けてもよいし、１個あるいは複数の継手毎に間隔を置いて設けても何れでもよく、また、前後の壁体構成部材２、６における継手１ａ、１ｂと５ａ、５ｂの間で位置をずらして、前後の通水用スリット３、７を連続的に繋ぐ線がジグザグと成るような配置に設けてもよい。さらに、所定寸法Ｌ、Ｌ₁は、継手１ａ、１ｂ、５ａ、５ｂ毎に同一でもよいし異なってもよく、何れでもよい。
【００４５】
前述のように構成される前部の壁体４と後部の壁体８と水底面１３の間に中空室２５を設け、海水は前後の壁体４、８の上部の通水用スリット３、７を通って中空室２５に出入し、このとき波の勢いが減衰されて消波効果が発揮される。１７は海水面である。また、中空室２５には、中詰土砂が存在しないことにより、地震時等に大きな土圧が壁体に作用しないので、壁体構成部材２、６の強度確保が容易になる。
【００４６】
なお、前記通水用スリット３、７の幅をＤ１とし、かつ壁体構成部材３の配置間隔をＤ２とすると、Ｄ１／Ｄ２は約５〜３５％に設定され、好ましくは１０〜２０％である。
【００４７】
図３〜図８は、第１実施形態に係る水域構造物の変形例であり、水底面１３と構造物延長方向連結材９、１０の下面との間の所定位置において、通水用スリット３、７を形成した透過壁体４ｂ、８ｂを構成したものである。例えば、図３ａまたは図３ｂに示すように、壁体４、８の継手１ａ、１ｂ、５ａ、５ｂを海水面１７付近に設けて、通水用スリット３、７が水没しているような構成としてもよい。また、図３ｃに示すように、壁体４、８の継手１ａ、１ｂ、５ａ、５ｂを海水面１７と水底面１３との間に設けるような構成としてもよい。さらに、図４〜図８のように、壁体４の通水用スリット３と壁体８の通水用スリット７との位置がそれぞれ異なるようにしてもよい。
【００４８】
図９、図１０は、第２実施形態に係る水域構造物を示すものであって、この第２実施形態では、壁体構成部材２、６におけるＴ字状の鋼製継手１と嵌合溝１８を有する鋼製パイプからなる継手１ａ、１ｂおよび５ａ、５ｂの上端（イ）が第１実施形態の場合よりも上位にあって、構造物延長方向連結材９、１０の中に埋設されており、壁体上部に通水用スリットのない不透過壁体４ａ、８ａが構築されていることである。他の構成は第１実施形態と同じである。
【００４９】
第２実施形態では、中空室２５内の海水が出入りできない点で、第１実施形態の消波効果は期待できないが、中空室２５内に中詰土砂が充填されていない点で、第１実施形態と同様に地震時等に大きな土圧が壁体に作用しないので、壁体構成部材２、６の強度確保が容易になる利点がある。
【００５０】
図１１、図１２は、第３実施形態を示す。この第３実施形態では、図示左側が壁体上部に通水用スリット３がある透過壁体４ｂが構築されるのに対し、図示右側は壁体上部に通水用スリットのない不透過壁体８ａが構築されていることである。他の構成は第２実施形態と同じである。
【００５１】
また、図１３は、第３実施形態に係る水域構造物の変形例であり、水底面１３と構造物延長方向連結材９の下面との間の所定位置において通水用スリット３を形成した透過壁体４ｂの例を示したものである。
【００５２】
図１４、図１５は、第４実施形態を示す。この第４実施形態では、前後の壁体構成部材２、６が海水中にある状態で構築された水域構造物において、中空室２５の下部層２２において、水底面１３から所定高さまで、所定量の中詰材料２１が収容されている。中詰材料２１の上面には、表面保護層２６が設けられていて、この表面保護層２６は、各図には、後方から前方向かって低くなるように傾斜した斜面で、斜面の前端と後端よりも、前後の継手１ａ、１ｂおよび５ａ、５ｂの上端（イ）は若干高い位置に設けられる。他の構成は第１実施形態と同じである。
【００５３】
第４実施形態では、中空室２５が深い場合や、中空室２５の内容量を調整する場合等、中詰材料２１の収容量を調整することで容易に対応できる。消波作用等は第１実施形態のものに加えて、表面保護層２６の傾斜した斜面でも奏される。
【００５４】
図１６（Ａ）、（Ｂ）、（Ｃ）は、中空室２５に充填する中詰材料２１が表面保護層２６で覆われる上面が、同一角度で傾斜する斜面２３からなる例と、斜面２３および水平面２４とからなる例と、水平面２４のみからなる例が示されている。
【００５５】
次に、図１７、図１８および図１９、図２０は、それぞれ中空室２５に充填する中詰材料２１が表面保護層２６で覆われる上面が、水平面２４からなると共に、背面に裏込材２８が裏込めされている。なお、図１７、図１８では、左右側の壁体上部に通水用スリット３、７がある透過壁体４ｂ、８ｂが構築されている。また、図１９、図２０では、図示左側が壁体上部に通水用スリット３がある透過壁体４ｂが構築されるのに対し、図示右側は壁体上部に通水用スリットのない不透過壁体８ａが構築されている。
【００５６】
図２１〜図２６は、第５〜第７実施形態を示し、これらの各実施形態では、コンクリート製上部工１２の下面形状を変更した点が特徴である。図２１、図２２に示す第５実施形態おいては、コンクリート製上部工１２の下面に１個ないし複数個の消波突起１４が設けられている。この消波用突起１４の長さは波の高さに対応して適正寸法に設けるのがよく、また複数個設けるときは、前後方向に長さを階段状に変化させるとよく、さらに、コンクリート製上部工１２の長手方向に連続して設けても、断続的に設けても何れでもよい。
【００５７】
第５実施形態では、海面に生ずる波が通水用スリット３、７を通過した後コンクリート製上部工１２の下面の消波用突起１４にぶつかることによって、消波効果が向上する。他の構成と作用は、第1実施形態と同じである。
【００５８】
図２３、図２４に示す第６実施形態おいては、コンクリート製上部工１２の下面に、前方が高く後方が低い消波用段部１５が設けられている。この消波用段部１５の長さは波の高さや周期に対応して適正寸法に設けるのがよく、また複数個設けるときは、前後方向に長さを階段状に変化させてもよい。さらに、消波用段部１５が設けられたコンクリート製上部工１２の上面にも、必要に応じて、下面の消波用段部１５と逆向きの消波用段部１５ａを階段状に設け、親水機能を付与してもよい。
【００５９】
第６実施形態では、海面に生ずる波が通水用スリットを通過した後コンクリート製上部工１２の下面の消波用段部１５にぶつかることで、消波される。また、波がコンクリート製上部工１２の上を越波する時、階段状の消波用段部１５ａによって消波される。他の構成と作用は、第1実施形態と同じである。
【００６０】
図２５、図２６に示す第７実施形態おいては、コンクリート製上部工１２の下面と上面が平行に、かつ後方に（図１８の右方向）下り傾斜しており、前方が高く後方が低い消波用傾斜下面１６と消波用傾斜上面１６ａが設けられている。この消波用傾斜下面１６と上面１６ａの傾斜角度は、波の高さや周期等に対応して適正角度に設けるのがよい。
【００６１】
第７実施形態では、海面に生ずる高波がコンクリート製上部工１２の消波用傾斜下面１６にぶつかることで、消波される。また、波がコンクリート製上部工１２の上面を戻る時、この消波用傾斜上面１６ａにぶつかって消波される。他の構成と作用は、第１実施形態と同じである。
【００６２】
図２７、図２８は、第８実施形態を示す。この第８実施形態では、あたかも、図３に示す第４実施形態における前後の壁体構成部材２、６の中間に柱状部材２７が打設されると共に、頭部が断面方向連結材１１に連結され、かつ、コンクリート製上部工１２の長手方向（延長方向）に所定間隔で複数本打設された例が示されている。なお、柱状部材２７の配置角度は、鉛直に対してθであり、図示例はθ＝０°の例が示されている。
【００６３】
このように、前後の壁体構成部材２、６の中間に柱状部材２７を設けるのは、１）水平方向の耐荷機能を増加させる場合、２）消波機能を発現させる場合、３）前後の壁体構成部材２、６の間隔幅が大きく、コンクリート製上部工を中間部で支持する必要がある場合等である。
【００６４】
次に、図２９〜図５１は第９〜第１９実施形態を示し、この各実施形態では、前述のように壁体構成部材２、６の中間に柱状部材２７が打設されると共に、柱状部材２７と壁体構成部材２、６の間が斜材３１ａ、３１ｂを介して結合された実施例における各種変形例を示す。以下、順に説明する。
【００６５】
図２９、図３０は、第９実施形態に係る水域構造物を示すものであって、下側の所定個所に、Ｔ字状の鋼製継手１と嵌合溝１８を有する鋼製パイプ製の継手１ａ、１ｂを備えた鋼管矢板からなる多数の壁体構成部材２を、前記各継手１ａ、１ｂを相互に噛み合わされた状態で、水中における基礎地盤２０に打設して、上側に通水用スリット３を有する壁体４を構成する。上側の通水用スリット３は、継手１ａ、１ｂの上端（イ）を壁体構成部材２の頭部が連結される構造物延長方向連結材９の下面（ロ）よりも所定寸法Ｌだけ下げることで、鋼管矢板本体の間に形成される。
【００６６】
前記壁体４に対向して所定間隔を隔てた位置において、下側の所定個所に、Ｔ字状の鋼製継手１と嵌合溝１８を有する鋼製パイプ製の継手５ａ、５ｂを備えた鋼管矢板からなる多数の壁体構成部材６を、前記継手５ａ、５ｂを相互に噛み合わされた状態で、水中における基礎地盤２０に打設して、上側に通水用スリット７を有する壁体８を構成する。上側の通水用スリット７は、継手５ａ、５ｂの上端（イ）を壁体構成部材６の頭部が連結される構造物延長方向連結材１０の下面（ロ）よりも所定寸法Ｌ₁だけ下げることで、鋼管矢板本体の間に形成する。また、通水用スリット３、７は各壁体構成部材２、６を繋ぐ全ての継手１ａ、１ｂ、５ａ、５ｂに設けてもよいし、１個あるいは複数の継手毎に間隔を置いて設けても何れでもよい。さらに、前後の壁体構成部材２、６における継手１ａ、１ｂと５ａ、５ｂの間で位置をずらして、前後の通水用スリット３、７を連続的に繋ぐ線がジグザグと成るような配置に設けても、何れでもよい。前後の構造物延長方向連結材９、１０の間は、断面方向連結材１１により連結され、これら三つの連結材９、１０、１１により所定巾で長手方向に延長するコンクリート製上部工１２が構築される。
【００６７】
前記壁体４、８の中間において、水中における基礎地盤２０に柱状部材２７が打設され、かつ構造物延長方向に所定の間隔をあけて複数配置されている。柱状部材２７の中間部には、鞘管２９が外挿されていて、鞘管２９と柱状部材２７との間の空隙部にはモルタル等の経時硬化性材料３３が充填されている。この鞘管２９には左右両側の斜材３１ａ、３１ｂの下端が固着されていると共に、斜材３１ａ、３１ｂの上端は、構造物延長方向連結材９、１０における上方連結部３４ａ、３４ｂに連結されている。このとき、斜材３１ａ、３１ｂの上端部と壁体４、８の上端部とを、単数または複数の鋼製連結部材（図示を省略する）を介して溶接により固着して、コンクリート製上部工１２に埋め込んでもよい。
【００６８】
左右両側の斜材３１ａ、３１ｂの下端は、図２９のように１つの鞘管２９の両側に固着してもよいし、或いは図３１に示すように、２つの鞘管２９を上下２段に重ねて柱状部材２７に外挿し、上下の鞘管２９に別々に左右両側の斜材３１ａ、３１ｂの下端を固着してもよい。前記鞘管２９の内周面と、鞘管２９で覆われる柱状部材２７の外周面に複数のジベル３５を固着し、鞘管２９の下端内周部にシールリング３６を配置し、グラウト注入用ホースを介して、柱状部材２７と鞘管２９の間隙に水中不分離性混和剤等を混入したモルタル等の経時硬化性材料３３を注入充填することで、柱状部材２７と鞘管２９が強固に固着される。
【００６９】
前述のように構成される前部の壁体４と後部の壁体８および水底面１３である中空室底面２５ａとの間に中空室２５を設ける。そして、海水は前後の壁体４、８の上部の通水用スリット３、７を通って中空室２５に出入し、このとき波の勢いが減衰されて消波効果が発揮される。また、中空室２５には、中詰土砂が存在しないことにより、地震時等に大きな土圧が壁体に作用しないので、壁体構成部材２、６の強度確保が容易になる。また、前記鞘管２９は中空室２５の底部に配置されていて、鞘管２９と斜材３１ａ、３１ｂの下端部は中空室２５の下面２５ａ（水底面１３）と海水面１７の間に満たされる海水中に位置している。
【００７０】
図３２、図３３は、第１０実施形態を示す。この第１０実施形態では、壁体構成部材２、６におけるＴ字状の鋼製継手１と嵌合溝１８を有する鋼製パイプからなる継手１ａ、１ｂおよび５ａ、５ｂの上端（イ）が第９実施形態の場合よりも上位にあって、構造物延長方向連結材９、１０の中に埋設しており、壁体上部に通水用スリットのない不透過壁体４ａ、８ａが構築されていることである。他の構成は第９実施形態と同じである。
【００７１】
第１０実施形態では、中空室２５内の海水が出入りできない点で、消波効果は発揮できないが、中空室２５内に中詰土砂が充填されていない点で、第１実施形態と同様に地震時等に大きな土圧が壁体に作用しないので、壁体構成部材２、６の強度確保が容易になる利点がある。
【００７２】
図３４、図３５は、第１１実施形態に係る水域構造物を示す。この第１１実施形態では、図示左側の壁体４の上部が通水用スリット３がある透過壁体４ｂに構築されると共に、図示右側の壁体４の上部が通水用スリットのない不透過壁体８ａに構築されていることである。他の構成は第１０実施形態と同じである。
【００７３】
図３６、図３７は、第１２実施形態に係る水域構造物を示す。この第１２実施形態では、前後の壁体構成部材２、６が海水中にある状態で構築された水域構造物において、中空室２５の下部層２２において中空室底面２５ａ（水底面１３）から所定高さまで、所定量の中詰材料２１が収容されている。中詰材料２１の上面には、表面保護層２６が設けられていて、この表面保護層２６は、図３６では、前後方向がフラットな水平面で、この水平面よりも、前後の継手１ａ、１ｂおよび５ａ、５ｂの上端（イ）は若干高い位置に設けられ、その上方は通水用スリット３、７とされている。さらに、柱状部材２７に外挿される鞘管２９は、中詰材料２１の表面保護層２６よりも上部で、海水面１７よりも下方に位置して設けられていて、この鞘管２９に１本の斜材３１ａの下端が固着されている。他の構成は第１０、第１１実施形態と同じである。
【００７４】
第１２実施形態では、中空室２５が深い場合や、中空室２５の内容量を調整する場合等、中詰材料２１の収容量を調整することで容易に対応できる。消波効果等の作用は第９実施形態と類似である。また、鞘管２９と斜材３１ａの下端部は、中詰材料２１の上方に位置している。
【００７５】
図３８、図３９は、第１３実施形態に係る水域構造物を示す。この第１３実施形態では、鞘管２９に左右の斜材３１ａ、３１ｂの下端が固着された例が示されている。他の構造と作用効果は、図３６に示す第１２実施形態と同じである。
【００７６】
図４０、図４１は、第１４実施形態に係る水域構造物を示す。この第１４実施形態では、中詰材料２１の上面に設けられた表面保護層２６が、前後の壁体構成部材２、６の間において、後方から前方向かって低くなるように傾斜した斜面に設けられていると共に、斜面の前端と後端よりも、前後の継手１ａ、１ｂおよび５ａ、５ｂの上端（イ）は若干高い位置に設けられ、上方は通水用スリット３、７とされている。第１４実施形態では、表面保護層２６が斜面に設けられているので、第１２、第１３実施形態と異なる消波効果が発揮される。他の構成と作用効果は、図３６に示す第１２実施形態と同じである。
【００７７】
図４２、図４３は、第１５実施形態に係る水域構造物を示す。この第１５実施形態では、鞘管２９と左右の斜材３１ａ、３１ｂの下端部が、中空室２５の下部層２２において、水底面１３から所定高さまで収容された中詰材料２１の中に埋設されている。他の構成と作用効果は、図３８に示す第１３実施形態と同じである。
【００７８】
図４４、図４５は、第１６実施形態に係る水域構造物を示す。この第１６実施形態では、壁体構成部材２、６におけるＴ字状の鋼製継手１と嵌合溝１８を有する鋼製パイプからなる継手１ａ、１ｂおよび５ａ、５ｂの上端（イ）が第１５実施形態の場合よりも上位にあって、構造物延長方向連結材９、１０の中に埋設しており、壁体上部に通水用スリットのない不透過壁体４ａ、８ａが構築されていることである。他の構成と作用効果は、図４２に示す第１５実施形態と同じである。
【００７９】
図４６、図４７は、第１７実施形態に係る水域構造物を示す。この第１７実施形態では、中詰材料２１の上面に設けられた表面保護層２６が、前後の壁体構成部材２、６の間において、後方から前方向かって低くなるように傾斜した斜面に設けられていると共に、斜面の前端と後端よりも、前後の継手１ａ、１ｂおよび５ａ、５ｂの上端（イ）は若干高い位置に設けられ、その上方は通水用スリット３、７とされている。第１７実施形態では、表面保護層２６が斜面に設けられているので、図４２の第１５実施形態と異なった消波効果が発揮される。他の構造と作用効果は、第１５実施形態と同じである。
【００８０】
図４８、図４９は、第１８実施形態に係る水域構造物を示す。この第１８実施形態では、中詰材料２１の上面に設けられた表面保護層２６が、前後の壁体構成部材２、６の間において、前方斜面２３および後方水平面２４とからなる例が示されている。また、前方斜面２３の前端および後方水平面２４の後端よりも、前後の継手１ａ、１ｂおよび５ａ、５ｂの上端（イ）は若干高い位置に設けられ、かつ壁体上部に通水用スリット３、７のある透過壁体４ｂ、８ｂが構築されていることである。第１８実施形態では、前方斜面２３による水深変化作用と後方水平面２４による水深一定作用の相乗効果を狙って設けられている。他の構造と作用効果は、図４６に示す第１７実施形態と同じである。
【００８１】
図５０、図５１は、第１９実施形態に係る水域構造物を示す。この第１９実施形態では、図示左側の壁体構成部材２の上部に通水用スリット３のある透過壁体４ｂが構築され、図示右側の壁体構成部材６の上部に通水用スリットのない不透過壁体８ａが構築されていることである。他の構造と作用効果は、図４８に示す第１８実施形態と同じである。
【００８２】
図５２、図５３は、第２０実施形態に係る水域構造物を示す。第２０実施形態では、柱状部材２７の所定範囲または斜材３１ａ，３１ｂの所定範囲に消波用突設体４０を設けて、消波効果の更なる向上を図るものである。図５２は柱状部材２７に消波用突設体４０を設けた例を示し、図５３は斜材３１ａに消波用突設体４０を設けた例を示したものである。もちろん、消波用突設体４０を、柱状部材２７、斜材３１ａ、斜材３１ｂに任意に組合せて設けてもよい（図示を省略する）。
【００８３】
図５４は、消波用突設体４０の構造例を横断面図で示したものである。図５４ａは、鉄筋コンクリート４１により、筒状空洞４２を有する消波用突設体４０ａを構成した例である。この場合、柱状部材２７または斜材３１ａ，３１ｂを筒状空洞４２へ挿入し、その後、柱状部材２７または斜材３１ａ，３１ｂと筒状空洞４２との間にモルタルグラウト４３を充填して、消波用突設体４０ａを所定位置に配置する。
【００８４】
また図５４ｂは、鋼板４４と鋼管４５により略菱形状の消波用突設体４０ｂを構成した例である。この場合、柱状部材２７または斜材３１ａ，３１ｂを鋼管４５へ挿入し、その後、柱状部材２７または斜材３１ａ，３１ｂと鋼管４５との間にモルタルグラウト４３を充填して、消波用突設体４０ｂを所定位置に配置する。
【００８５】
【発明の効果】
本発明によると、二重壁構造物において、２列の壁体間に中空室を設けたことにより地震時慣性力を低減することができる。このため、従来の二重壁構造物のように、地震時における中詰土砂に作用する慣性力で壁体に大きな土圧が作用したり、構造全体に大きな回転力が作用することがない。したがって、壁体に大きな剛性を有する部材を使用したり、壁体の間隔を大きくして中詰土砂によるせん断抵抗を大きくして対応したりする必要がなく、建設コストを低減できる。
【００８６】
さらに、本発明では、一方または両方の連続壁の所定位置に通水用スリットを設けることにより、反射波対策機能や海水循環機能を付与することができる。
【００８７】
さらに、本発明では、二重壁構造物の連続壁を、海水が透過できる通水用スリット等がある透過構造にした場合は、消波効果を発現するのに必要な遊水室の役割を果たす中空室を有しているため、消波効果を発揮でき、反射波高を低減できると共に、海水を透過させることもできるので、堤内水質の悪化を防止することも可能である。
【００８８】
特に、本発明では、柱状部材と斜材を配置することにより、大深度・高波浪域等波浪条件や地震に伴う慣性力や動水圧といった地震時荷重条件の厳しい個所で要求される水平方向の耐荷機能（耐荷力、変形性能）を確保することができる。
【００８９】
また、柱状部材や斜材の本数や部材剛性を増減することにより、構造物としての水平方向の耐荷機能（耐荷力、変形性能）を調整・確保できる。さらに、２列の壁体の間隔や中空室下部層の高さ・形状を変化させることにより、中詰土砂に作用する慣性力や消波機能を調整できる。
【図面の簡単な説明】
【図１】本発明の第１実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図２】（Ａ）は図１の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図３】第１実施形態に係る水域構造物の変形例を示した図である。
【図４】第１実施形態に係る水域構造物の変形例を示した図である。
【図５】第１実施形態に係る水域構造物の変形例を示した図である。
【図６】第１実施形態に係る水域構造物の変形例を示した図である。
【図７】第１実施形態に係る水域構造物の変形例を示した図である。
【図８】第１実施形態に係る水域構造物の変形例を示した図である。
【図９】本発明の第２実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図１０】（Ａ）は図３の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図１１】本発明の第３実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図１２】（Ａ）は図５の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図１３】第３実施形態に係る水域構造物の変形例を示した図である。
【図１４】本発明の第４実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図１５】（Ａ）は図７の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図１６】（Ａ）、（Ｂ）、（Ｃ）は、中空室の表面保護層で覆われる上面が、同一角度で傾斜する斜面からなる例と、斜面および水平面とからなる例と、水平面のみからなる例が示された説明図である。
【図１７】中空室の上面が表面保護層で覆われと共に、背面に裏込材が充填された遊水室を有する水域構造物を示す縦断側面図である
【図１８】（Ａ）は図１７の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図１９】中空室の上面が表面保護層で覆われと共に、背面に裏込材が充填された遊水室を有する水域構造物を示す縦断側面図である。
【図２０】（Ａ）は図１９の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図２１】本発明の第５実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図２２】（Ａ）は図２１の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図２３】本発明の第６実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図２４】（Ａ）は図２２の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図２５】本発明の第７実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図２６】（Ａ）は図２５の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図２７】本発明の第８実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図２８】（Ａ）は図２７の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図２９】本発明の第９実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図３０】（Ａ）は図２９の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図３１】柱状部材と斜材下端の鞘管との結合構造を示す拡大断面図である。
【図３２】本発明の第１０実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図３３】（Ａ）は図３２の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図３４】本発明の第１１実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図３５】（Ａ）は図３４の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図３６】本発明の第１２実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図３７】（Ａ）は図３６の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図３８】本発明の第１３実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図３９】（Ａ）は図３８の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図４０】本発明の第１４実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図４１】（Ａ）は図４０の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図４２】本発明の第１５実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図４３】（Ａ）は図４２の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図４４】本発明の第１６実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図４５】（Ａ）は図４４の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図４６】本発明の第１７実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図４７】（Ａ）は図４６の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図４８】本発明の第１８実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図４９】（Ａ）は図４８の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図５０】本発明の第１９実施形態に係る遊水室を有する水域構造物を示す縦断側面図である。
【図５１】（Ａ）は図５０の壁体構成部材の配置態様を示す平面説明図、（Ｂ）は図（Ａ）における継手の詳細図である。
【図５２】本発明の第２０実施形態に係る水域構造物を示す縦断側面図であり、柱状部材に消波用突設体を設けた例を示したものである。
【図５３】本発明の第２０実施形態に係る水域構造物を示す縦断側面図であり、斜材に消波用突設体を設けた例を示したものである。
【図５４】（ａ）は鉄筋コンクリート製の消波用突設体の横断面図であり、（ｂ）は鋼板および鋼管製の消波用突設体の横断面図である。
【符号の説明】
１鋼製継手
１ａ、１ｂ継手
２壁体構成部材
３通水用スリット
４壁体
４ａ不透過壁体
４ｂ透過壁体
５ａ、５ｂ継手
６壁体構成部材
７通水用スリット
８壁体
８ａ不透過壁体
８ｂ透過壁体
９、１０構造物延長方向連結材
１１断面方向連結材
１２コンクリート製上部工
１３水底面
１４消波用突起
１５消波用段部
１５消波用段部
１６消波用傾斜下面
１７海水面
１８嵌合溝
２０基礎地盤
２１中詰材料
２２中空室下部層
２３斜面
２４水平面
２５中空室
２５ａ中空室底面
２６表面保護層
２７柱状部材
２８裏込材
２９、２９ａ、２９ｂ鞘管
３１ａ、３１ｂ斜材
３２ａ、３２ｂ、３２ｃ上方連結部
３３経時硬化性材料
３５ジベル
３６シールリング
４０消波用突設体
４０ａ消波用突設体
４０ｂ消波用突設体
４１鉄筋コンクリート
４２筒状空間
４３モルタルグラウト
４４鋼板
４５鋼管[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an aquatic structure composed of two rows of walls provided in a water area such as a harbor, a fishing port, and a coast.
[0002]
[Prior art]
  Conventionally, a double wall structure provided in a water area such as a harbor or a fishing port has a continuous wall formed in a predetermined shape by driving a wall structure member such as a steel sheet pile or a steel pipe sheet pile into a water bottom ground while fitting the joint. Two rows are constructed at intervals, and the heads of the two rows of continuous walls are connected by tie materials, and then filled with filled sand between the two rows of continuous walls, and then the superstructure is constructed. It had been. There are two methods for connecting the heads of the continuous wall: a tie material bonding method and a top plate bonding method.
[0003]
[Problems to be solved by the invention]
As described above, in the case of a double wall structure provided in a water area such as a conventional harbor or fishing port, it is common sense that the filling soil sand is filled up to the vicinity of the top end of the double wall, and a hollow chamber is formed in the upper part. Is not provided. This is considered to be due to the absence of a design method when a hollow chamber is provided in the upper part.
[0004]
  On the other hand, the inertial force acting on the paddy soil during an earthquake is proportional to the total mass of the padded soil. For this reason, in a conventional double wall structure, (a) during an earthquake, a large earth pressure (inertial force) acts on the wall body from the horizontal direction. Force acts and gives a large load to the foundation ground. In addition, (b) due to the structural property of resisting against horizontal external force due to the shear resistance of the filling soil, horizontal deformation such as the top end horizontal displacement is large before the shear resistance of the filling soil is developed. There was a problem of becoming.
[0005]
  The following measures were taken for the problem (a).
1) Use a member having great rigidity for the wall.
2) Use gravel material with a large internal friction angle as medium-filled earth and sand to increase the shear resistance due to medium-filled earth and sand.
3) In the case of the top plate coupling type, the wall width (width of the middle earth and sand) is increased in order to reduce the axial force generated in the wall.
[0006]
  In the case of the measure 1), a wall member having a large cross section is required, and there is a problem that the production, transportation, construction, and the like of the member are hindered. In the case of the above-mentioned countermeasure 2), there is a problem in that the gravel material is expensive and thus the economic efficiency is hindered. In the case of the above countermeasure method 3), if the interval between the wall bodies is increased, the width of the padded soil also increases, so the inertial force during the earthquake acting on the padded soil also increases, and the wall width can be obtained depending on the design seismic intensity. There was a design problem.
[0007]
  There was no specific countermeasure for the problem (b). For this reason, it is desired to develop a double wall structure with a high degree of freedom in design that can control the deformation without the need to make the space between the wall bodies (width of the padded earth and sand) and the cross section of the wall structural members so large. It was.
[0008]
  Further, the conventional double wall structure has a steel sheet pile or steel pipe sheet pile joint extending to the inside of the upper work, and when seawater permeates through the front and rear continuous walls, it has a wave-dissipating effect. It was an impermeable structure with no water slits or the like. Furthermore, since it does not have a hollow chamber that plays the role of a water reserving chamber necessary for expressing the wave-dissipating effect, the wave-dissipating effect cannot be exhibited and the reflected wave height cannot be reduced. In addition, because of the impervious structure, there was a problem that seawater did not permeate from the structure body, resulting in deterioration of water quality in the levee. For this reason, development of the double wall structure which has a wave-absorbing function and the permeation | transmission function of seawater was desired.
[0009]
  The present invention solves the above-mentioned problems by combining a device for fitting the joints in the wall constituting member, a device for setting the height of the top edge of the padded earth and sand, and an arrangement of the additional member.
[0010]
[Means for Solving the Problems]
  In order to solve the conventional problems, the water structure according to the present invention is configured as follows.
[0011]
  The water structure according to claim 1 is provided at a predetermined location.FirstCoupling (1a),SecondNumerous with the joint (1b)FirstThe wall member (2)FirstCoupling (1a),SecondFit the joint (1b) and place it on the foundation ground (20) by means such as placingFirstConstituting the wall (4),FirstAt a predetermined location at a position facing the wall (4) at a predetermined intervalThirdJoint (5a),4thNumerous with fittings (5b)SecondThe wall member (6)ThirdJoint (5a),4thFit the joint (5b) and place it on the foundation ground (20) by means such as placingSecondConstituting the wall (8), saidFirstThe head of the wall component (2)FirstConnected by a structure extension direction connecting material (9),SecondThe head of the wall constituting member (6)SecondConnected by a structure extension direction connecting material (10),FirstWall (4) and saidSecondThe heads of the wall bodies (8) are connected by the cross-sectional connecting material (11),FirstTo include the intersection of the structure extension direction connecting material (9) and the cross-sectional direction connecting material (11)FirstAn upper joint (A) is formed,SecondIn order to include the intersection of the structure extension direction connecting material (10) and the cross-sectional direction connecting material (11)SecondAn upper joint (B) is formed,FirstWith the wall (4)SecondA hollow chamber (25) having a water bottom as a hollow chamber lower surface (25a) is provided between the wall bodies (8), and is provided at a predetermined location from the water bottom (13) to the lower surface of the cross-sectional connection member (11).FirstConstructing a transmission wall (4b) having a water passage slit (3),FirstThe width of the water passage slit (3) is D1, andSecondD1 / D2 is set to 5 to 35% when the arrangement interval of the wall constituting member (6) is D2.One or a plurality of wave-dissipating protrusions (14) are provided on the lower surface of the cross-section direction connecting member (11).It is characterized by.
[0012]
  The water body structure according to claim 2 is characterized in that, in the invention according to claim 1, when a plurality of the wave-dissipating protrusions (14) are provided, the length is changed stepwise in the front-rear direction. .
[0013]
  The water area structure according to claim 3 is provided at a predetermined location.FirstCoupling (1a),SecondNumerous with the joint (1b)FirstThe wall member (2)FirstCoupling (1a),SecondFit the joint (1b) and place it on the foundation ground (20) by means such as placingFirstConstituting the wall (4),FirstAt a predetermined location at a position facing the wall (4) at a predetermined intervalThirdJoint (5a),4thNumerous with fittings (5b)SecondThe wall member (6)ThirdJoint (5a),4thFit the joint (5b) and place it on the foundation ground (20) by means such as placingSecondConstituting the wall (8), saidFirstThe head of the wall component (2)FirstConnected by a structure extension direction connecting material (9),SecondThe head of the wall constituting member (6)SecondConnected by a structure extension direction connecting material (10),FirstWall (4) and saidSecondThe heads of the wall bodies (8) are connected by the cross-sectional connecting material (11),FirstTo include the intersection of the structure extension direction connecting material (9) and the cross-sectional direction connecting material (11)FirstAn upper joint (A) is formed,SecondIn order to include the intersection of the structure extension direction connecting material (10) and the cross-sectional direction connecting material (11)SecondAn upper joint (B) is formed,FirstWith the wall (4)SecondA hollow chamber (25) having a water bottom as a hollow chamber lower surface (25a) is provided between the wall bodies (8), and is provided at a predetermined location from the water bottom (13) to the lower surface of the cross-sectional connection member (11).FirstConstructing a transmission wall (4b) having a water passage slit (3),FirstThe width of the water passage slit (3) is D1, andSecondD1 / D2 is set to 5 to 35% when the arrangement interval of the wall constituting member (6) is D2.Cross-sectional connecting material ( 11 ) A wave-dissipating step (15) is provided on the lower surface of the front and the rear is lower.It is characterized by.
[0014]
  The water body structure according to claim 4 is the invention according to claim 3, wherein when the plurality of wave-dissipating steps (15) are provided, the length is changed stepwise in the front-rear direction, and / or A wave-dissipating step part (15a) opposite to the wave-dissipating step part is also provided in a step-like manner on the upper surface of the cross-section direction connecting member (11) to provide a hydrophilic function.
[0015]
  The water structure according to claim 5 is the invention according to any one of claims 1 to 4,ThirdJoint (5a),4thThe joint (5b) from a predetermined position under the water bottomSecondThe structure extending direction connecting member (10) is continuously arranged in a fitted state and constitutes an impermeable wall (8a).
[0016]
  The water body structure according to claim 6 is the invention according to any one of claims 1 to 4,ThirdJoint (5a),4thThe joint (5b) is continuously arranged in a fitted state from a predetermined position below the water bottom to a predetermined position below the water bottom,ThirdJoint (5a),4thIn the upper part of the joint (5b)SecondThe transmission wall body (8b) in which the slit (7) for water flow is formed is characterized.
[0017]
  The water structure according to claim 7 is the invention according to claim 1 or 3, whereinFirstIt is configured such that the water passage slit (3) is submerged, orFirstCoupling (1a),SecondThe joint (1b) is provided between the sea water surface (17) and the water bottom surface (13).
[0018]
  The water body structure according to claim 8 is the invention according to any one of claims 1 to 4,SecondAt a predetermined position between the lower surfaces of the structure extension direction connecting members (10),SecondA transmission wall body (8b) having a water passage slit (7) is formed.
[0019]
  The water body structure according to claim 9 is the invention according to any one of claims 1 to 8, wherein at least one columnar member (27) is provided in the cross-sectional direction.FirstWith the wall (4)SecondIt is arrange | positioned by means, such as placing, in the foundation ground (20) of the intermediate part of a wall (8), and the head of the said columnar member (27) is connected with the cross-section direction connection material (11) at least. And
[0020]
  The water body structure according to claim 10 is the invention according to any one of claims 1 to 9,FirstWith the wall (4)SecondThe hollow chamber (25) between the wall bodies (8) is filled with the filling material (21) to a predetermined height to form the hollow chamber lower layer (22), and the filling material (21)FirstThe top height on the wall (4) side was fittedFirstCoupling (1a),SecondThe height of the top end of the joint (1b) is lower than that of the filling material (21).SecondThe top height on the wall (8) side was fittedThirdJoint (5a),4thIt is characterized by being lower than the top end height of the joint (5b).
[0021]
  The water body structure according to an eleventh aspect is characterized in that, in the invention according to the tenth aspect, the surface of the hollow chamber lower layer (22) has an arbitrary shape such as a horizontal plane, a slope, or a combination thereof.
[0022]
  The water structure according to claim 12 is characterized in that, in the invention according to claim 10, a surface protective layer (26) is provided on the surface of the hollow chamber lower layer (22).
[0023]
  The water body structure according to claim 13 is the invention according to claim 9, wherein one sheath pipe (29) is extrapolated to an intermediate portion of the columnar member (27), and the sheath pipe (29) At least oneFirstThe lower end of the diagonal member (31a) is connected,FirstThe upper end of the diagonal (31a)SecondIt is connected to the upper coupling part (B), and the space between the sheath tube (29) and the columnar member (27) is filled with a time-curable material (33) such as mortar. .
[0024]
  In the water body structure according to claim 14, in the invention according to claim 9, at least one sheath pipe (29) is extrapolated at an intermediate portion of the columnar member (27), and one of the sheath pipes (29) is provided. On the side ofFirstThe lower end of the diagonal member (31a) is connected,FirstThe upper end of the diagonal (31a)SecondConnected to the upper joint (B), on the other side of the sheath tube (29)SecondThe lower end of the diagonal member (31b) is connected,SecondThe upper end of the diagonal (31b)FirstIt is connected to the upper joint part (A), and the space between the sheath tube (29) and the columnar member (27) is filled with a time-curable material (33) such as mortar. .
[0025]
  In the water body structure according to claim 15, in the invention according to claim 9, at least two sheath pipes (29a) and sheath pipes (29b) are extrapolated to an intermediate portion of the columnar member (27), On the side of the sheath tube (29a)FirstThe lower end of the diagonal member (31a) is connected,FirstThe upper end of the diagonal (31a)SecondThe other side surface of the sheath tube (29b) connected to the upper joint (B) and disposed on the upper side of the sheath tube (29a)SecondThe lower end of the diagonal member (31b) is connected,SecondThe upper end of the diagonal (31b)FirstIt is connected to the upper joint (A), and the space between the sheath tube (29a) and the sheath tube (29b) and the columnar member (27) is filled with a time-curable material (33) such as mortar. It is characterized by being.
[0026]
  The water body structure according to claim 16 is the invention according to any one of claims 13 to 15, wherein the sheath pipe (29) is formed between the upper surface of the foundation ground (20) and the lower surface of the cross-sectional connection member (11). It arrange | positions in the predetermined position between.
[0027]
  The water structure according to claim 17 is characterized in that, in the invention according to claim 9, a wave-dissipating protruding body (40) is provided in a predetermined range of the columnar member (27).
[0028]
  The water body structure according to claim 18 is the invention according to any one of claims 9 to 17,FirstDiagonal (31a) andSecondDiagonal (31b), orFirstDiagonal (31a) orSecondA wave-dissipating protruding body (40) is provided in a predetermined range of the diagonal member (31b).
[0029]
  The water body structure according to claim 19 is the invention according to any one of claims 1 to 18,FirstWall component (2) andSecondThe wall member (6) is a steel pipe sheet pile.
[0030]
  The water body structure according to claim 20 is characterized in that, in the invention according to claim 5, the wall member constituting the impermeable wall (8a) is a steel sheet pile.
[0031]
  The water structure according to claim 21 is characterized in that, in the invention according to claim 9, the columnar member (27) is a steel pipe pile.
[0032]
  The water body structure according to claim 22 is the invention according to any one of claims 1 to 21,SecondA backing material (28) is arranged at an appropriate height behind the wall (8).
[0035]
[Action]
  According to the present invention, in a double wall structure, an inertia force during an earthquake can be reduced by providing a hollow chamber between two rows of wall bodies. For this reason, unlike a conventional double wall structure, a large earth pressure does not act on the wall body due to the inertial force acting on the filling soil during an earthquake, and a large rotational force does not act on the entire structure. Therefore, it is not necessary to use a member having a large rigidity for the wall body, or to increase the shear resistance due to the filling soil by increasing the interval between the wall bodies, thereby reducing the construction cost.
[0036]
  Furthermore, in the present invention, a reflected wave countermeasure function and a seawater circulation function can be provided by providing a water passage slit at a predetermined position on one or both continuous walls.
[0037]
  Furthermore, in the present invention, when the continuous wall of the double wall structure is made into a transmission structure having a water passage slit or the like through which seawater can permeate, it plays the role of a water reserving chamber necessary to develop a wave-dissipating effect. Since it has a hollow chamber, it is possible to exhibit a wave-dissipating effect, reduce the reflected wave height, and allow seawater to pass therethrough, thereby preventing deterioration of the water quality in the levee.
[0038]
  In particular, in the present invention, by arranging columnar members and diagonal members, the horizontal direction required in places with severe wave conditions such as wave conditions such as deep and high wave areas, and inertial force and dynamic water pressure associated with earthquakes is required. A load bearing function (load bearing capacity, deformation performance) can be ensured.
[0039]
  In addition, by increasing or decreasing the number of columnar members or diagonal members and the member rigidity, it is possible to adjust and ensure the horizontal load resistance function (load resistance, deformation performance) as a structure.
[0040]
  Further, by changing the interval between the two rows of wall bodies and the height and shape of the hollow chamber lower layer, it is possible to adjust the inertial force and the wave-absorbing function acting on the filling soil.
[0041]
DETAILED DESCRIPTION OF THE INVENTION
  Next, the present invention will be described in detail based on the illustrated embodiment.
[0042]
  1 and 2 show a water body structure according to the first embodiment, which is composed of a steel pipe having a T-shaped steel joint 1 and a fitting groove 18 at a predetermined position on the lower side. A large number of wall body constituting members 2 made of steel pipe sheet piles having joints 1a and 1b are placed on the foundation ground 20 in water in a state where the joints 1a and 1b are engaged with each other, and water is passed upward. A wall 4 having a slit 3 for use is formed. The upper water passage slit 3 lowers the upper ends (b) of the joints 1a, 1b by a predetermined dimension L from the lower surface (b) of the structure extension direction connecting member 9 to which the heads of the wall constituting members 2 are connected. Thus, it is formed between the steel pipe sheet pile main bodies.
[0043]
  Joints 5a and 5b made of a steel pipe having a T-shaped steel joint 1 and a fitting groove 18 are provided at predetermined positions on the lower side at a position facing the wall body 4 at a predetermined interval. A wall body 8 having a large number of wall-forming members 6 made of steel pipe sheet piles placed on the foundation ground 20 in water with the joints 5a and 5b engaged with each other, and having a water passage slit 7 on the upper side. Configure. The upper water passage slit 7 has a predetermined dimension L higher than the lower surface (b) of the structure extension direction connecting member 10 to which the upper ends (b) of the joints 5a and 5b are connected to the heads of the wall constituting members 6.₁By lowering only, it forms between steel pipe sheet pile main bodies. The left and right structure extension direction connecting members 9 and 10 are connected by a cross-sectional direction connecting member 11, and a concrete superstructure 12 extending in the longitudinal direction with a predetermined width is constructed by these three connecting members 9, 10 and 11. Is done.
[0044]
  The slits 3 and 7 for water flow may be provided in all the joints 1a, 1b, 5a, and 5b that connect the respective wall constituting members 2 and 6, or provided at intervals for one or a plurality of joints. The lines connecting the front and rear water passage slits 3 and 7 by shifting the positions between the joints 1a, 1b and 5a, 5b in the front and rear wall members 2, 6 are zigzag. May be provided in such an arrangement. Furthermore, the predetermined dimensions L, L₁May be the same or different for each of the joints 1a, 1b, 5a, and 5b.
[0045]
  A hollow chamber 25 is provided between the front wall body 4, the rear wall body 8, and the water bottom surface 13 configured as described above, and seawater is formed in the slits 3 for passing water in the upper part of the front and rear wall bodies 4, 8, 7 enters and exits the hollow chamber 25, and at this time, the wave momentum is attenuated and the wave-dissipating effect is exhibited. 17 is the sea level. In addition, since there is no medium-filled earth and sand in the hollow chamber 25, a large earth pressure does not act on the wall body at the time of an earthquake or the like, so that it is easy to secure the strength of the wall member members 2 and 6.
[0046]
  In addition, if the width of the slits 3 and 7 for water flow is D1 and the arrangement interval of the wall member 3 is D2, D1 / D2 is set to about 5 to 35%, preferably 10 to 20%. is there.
[0047]
  3-8 is a modification of the water body structure which concerns on 1st Embodiment, and is the slit 3 for water flow in the predetermined position between the water bottom 13 and the lower surface of the structure extension direction connection material 9,10. , 7 are formed, and the transmission wall bodies 4b and 8b are formed. For example, as shown in FIG. 3 a or 3 b, the joints 1 a, 1 b, 5 a, 5 b of the walls 4, 8 are provided in the vicinity of the sea surface 17, and the water passage slits 3, 7 are submerged. It is good. Further, as shown in FIG. 3 c, the joints 1 a, 1 b, 5 a, and 5 b of the wall bodies 4 and 8 may be provided between the sea water surface 17 and the water bottom surface 13. Further, as shown in FIGS. 4 to 8, the positions of the water passage slit 3 of the wall body 4 and the water passage slit 7 of the wall body 8 may be different from each other.
[0048]
  9 and 10 show a water structure according to the second embodiment. In this second embodiment, the T-shaped steel joint 1 and the fitting groove in the wall constituting members 2 and 6 are shown. The upper ends (b) of the joints 1a, 1b and 5a, 5b made of steel pipes 18 are higher than those in the case of the first embodiment, and are embedded in the structure extension direction connecting members 9, 10. That is, impermeable wall bodies 4a and 8a having no slit for water passage are formed on the upper part of the wall body. Other configurations are the same as those of the first embodiment.
[0049]
  In the second embodiment, the seawater in the hollow chamber 25 cannot enter and exit, and thus the wave-dissipating effect of the first embodiment cannot be expected, but the first embodiment is that the hollow chamber 25 is not filled with filled soil sand. Since a large earth pressure does not act on a wall body at the time of an earthquake etc. similarly to a form, there exists an advantage from which the intensity | strength ensuring of the wall body structural members 2 and 6 becomes easy.
[0050]
  11 and 12 show a third embodiment. In the third embodiment, a transmission wall body 4b having a water passage slit 3 on the upper side of the wall body is constructed on the left side of the figure, whereas an impermeable wall body having no water passage slit on the upper side of the wall body is constructed. 8a is constructed. Other configurations are the same as those of the second embodiment.
[0051]
  FIG. 13 is a modified example of the water structure according to the third embodiment, and is a transmission in which a water passage slit 3 is formed at a predetermined position between the water bottom surface 13 and the lower surface of the structure extension direction connecting member 9. An example of the wall body 4b is shown.
[0052]
  14 and 15 show a fourth embodiment. In this fourth embodiment, in the water structure constructed with the front and rear wall members 2, 6 in seawater, a predetermined amount from the bottom surface 13 to a predetermined height in the lower layer 22 of the hollow chamber 25. The filling material 21 is accommodated. A surface protective layer 26 is provided on the upper surface of the filling material 21, and this surface protective layer 26 is a slope inclined so as to become lower from the rear to the front in each figure, and the front end and the rear of the slope The upper ends (A) of the front and rear joints 1a, 1b and 5a, 5b are provided at slightly higher positions than the ends. Other configurations are the same as those of the first embodiment.
[0053]
  In 4th Embodiment, when the hollow chamber 25 is deep, when adjusting the internal volume of the hollow chamber 25, it can respond easily by adjusting the accommodation amount of the filling material 21. FIG. The wave-dissipating action and the like are also exerted on the inclined surface of the surface protective layer 26 in addition to that of the first embodiment.
[0054]
  16A, 16 </ b> B, and 16 </ b> C show an example in which the upper surface of the filling material 21 filled in the hollow chamber 25 is covered with the surface protective layer 26, and the inclined surface 23 is inclined at the same angle. In addition, an example including the horizontal plane 24 and an example including only the horizontal plane 24 are illustrated.
[0055]
  Next, FIG. 17, FIG. 18, FIG. 19, and FIG. 20 show that the upper surface on which the filling material 21 filled in the hollow chamber 25 is covered with the surface protective layer 26 is composed of the horizontal surface 24 and the backing material 28 on the back surface. Is backed up. In FIGS. 17 and 18, transmission wall bodies 4b and 8b having water passage slits 3 and 7 on the upper left and right wall bodies are constructed. In FIGS. 19 and 20, the left side of the figure is constructed with a permeable wall body 4b having a water passage slit 3 at the upper part of the wall body, whereas the right side of the figure is impermeable without a water passage slit at the upper part of the wall body. A wall body 8a is constructed.
[0056]
  FIGS. 21 to 26 show fifth to seventh embodiments, which are characterized in that the shape of the lower surface of the concrete superstructure 12 is changed. In the fifth embodiment shown in FIGS. 21 and 22, one or a plurality of wave-dissipating protrusions 14 are provided on the lower surface of the concrete superstructure 12. The length of the wave-dissipating protrusions 14 is preferably provided in an appropriate dimension corresponding to the height of the wave. When a plurality of the wave-dissipating protrusions 14 are provided, the length may be changed stepwise in the front-rear direction. It may be provided either continuously or intermittently in the longitudinal direction of the superstructure 12.
[0057]
  In the fifth embodiment, the wave-dissipating effect is improved by hitting the wave-dissipating protrusions 14 on the lower surface of the concrete superstructure 12 after the wave generated on the sea surface passes through the slits 3 and 7 for water flow. Other configurations and operations are the same as those in the first embodiment.
[0058]
  In the sixth embodiment shown in FIGS. 23 and 24, a wave-dissipating step 15 is provided on the lower surface of the concrete superstructure 12 and the front is high and the back is low. The length of the wave-dissipating step portion 15 is preferably set to an appropriate dimension corresponding to the height and period of the wave. When a plurality of the wave-dissipating step portions 15 are provided, the length may be changed stepwise in the front-rear direction. Further, on the upper surface of the concrete superstructure 12 provided with the wave-dissipating step 15, if necessary, a wave-dissipating step 15 a opposite to the wave-dissipating step 15 on the lower surface is provided in a staircase shape. A hydrophilic function may be imparted.
[0059]
  In the sixth embodiment, the waves generated on the sea surface are wave-dissipated by passing through the water slits and then hitting the wave-dissipating step 15 on the lower surface of the concrete superstructure 12. Further, when the wave passes over the concrete superstructure 12, the wave is extinguished by the stepped wave-dissipating step 15 a. Other configurations and operations are the same as those in the first embodiment.
[0060]
  In the seventh embodiment shown in FIGS. 25 and 26, the lower surface and the upper surface of the concrete superstructure 12 are parallel and inclined backward (rightward in FIG. 18), the front is high and the rear is low. A wave-dissipating inclined lower surface 16 and a wave-dissipating inclined upper surface 16a are provided. The inclination angle between the wave-dissipating inclined lower surface 16 and the upper surface 16a is preferably set to an appropriate angle corresponding to the height and period of the wave.
[0061]
  In the seventh embodiment, high waves generated on the sea surface are wave-dissipated by hitting the wave-decaying lower surface 16 of the concrete superstructure 12. Further, when the wave returns to the upper surface of the concrete superstructure 12, the wave collides with the wave-dissipating inclined upper surface 16a to be wave-dissipated. Other configurations and operations are the same as those of the first embodiment.
[0062]
  27 and 28 show an eighth embodiment. In the eighth embodiment, the columnar member 27 is driven in the middle of the front and rear wall constituting members 2 and 6 in the fourth embodiment shown in FIG. 3 and the head is connected to the cross-sectional connecting member 11. In addition, an example is shown in which a plurality of concrete superstructures 12 are placed at a predetermined interval in the longitudinal direction (extension direction). Note that the arrangement angle of the columnar member 27 is θ with respect to the vertical, and in the illustrated example, an example in which θ = 0 ° is shown.
[0063]
  As described above, the columnar member 27 is provided in the middle of the front and rear wall constituting members 2 and 6 in order to 1) increase the horizontal load-bearing function, 2) develop the wave-dissipating function, and 3) front and rear. This is the case when the interval width between the wall members 2 and 6 is large and the concrete superstructure needs to be supported by the intermediate portion.
[0064]
  Next, FIGS. 29 to 51 show the ninth to nineteenth embodiments. In each of these embodiments, the columnar member 27 is placed in the middle of the wall constituting members 2 and 6 as described above, and the columnar shape is also provided. Various modifications in the embodiment in which the member 27 and the wall constituting members 2 and 6 are coupled via the diagonal members 31a and 31b are shown. Hereinafter, it demonstrates in order.
[0065]
  29 and 30 show an aquatic structure according to the ninth embodiment, which is made of a steel pipe having a T-shaped steel joint 1 and a fitting groove 18 at a predetermined position on the lower side. A large number of wall body component members 2 made of steel pipe sheet piles having joints 1a and 1b are placed on the foundation ground 20 in water in a state where the joints 1a and 1b are engaged with each other, and water is passed upward. A wall 4 having a slit 3 for use is formed. The upper water passage slit 3 lowers the upper ends (b) of the joints 1a, 1b by a predetermined dimension L below the lower surface (b) of the structure extension direction connecting member 9 to which the head of the wall member 2 is connected. Thus, it is formed between the steel pipe sheet pile main bodies.
[0066]
  Steel pipe joints 5a and 5b each having a T-shaped steel joint 1 and a fitting groove 18 are provided at predetermined positions on the lower side at a position facing the wall body 4 at a predetermined interval. A wall body 8 having a large number of wall-forming members 6 made of steel pipe sheet piles placed on the foundation ground 20 in water with the joints 5a and 5b meshed with each other, and having a water passage slit 7 on the upper side. Configure. The upper water passage slit 7 has a predetermined dimension L higher than the lower surface (b) of the structure extension direction connecting member 10 to which the upper ends (b) of the joints 5a and 5b are connected to the heads of the wall constituting members 6.₁By lowering only, it forms between steel pipe sheet pile main bodies. Further, the water passage slits 3 and 7 may be provided in all the joints 1a, 1b, 5a and 5b connecting the respective wall constituting members 2 and 6, or provided at intervals for one or a plurality of joints. Or any. Further, the positions of the joints 1a, 1b and 5a, 5b in the front and rear wall constituent members 2, 6 are shifted so that the line continuously connecting the front and rear water passage slits 3, 7 is zigzag. Either may be provided. The front and rear structure extension direction connecting members 9, 10 are connected by a cross-sectional direction connecting member 11, and a concrete superstructure 12 extending in the longitudinal direction with a predetermined width is constructed by these three connecting members 9, 10, 11. Is done.
[0067]
  In the middle of the wall bodies 4, 8, columnar members 27 are driven on the foundation ground 20 in water, and a plurality of them are arranged at predetermined intervals in the structure extension direction. A sheath tube 29 is extrapolated in an intermediate portion of the columnar member 27, and a space between the sheath tube 29 and the columnar member 27 is filled with a time-curable material 33 such as mortar. The lower ends of the diagonal members 31a and 31b on both the left and right sides are fixed to the sheath tube 29, and the upper ends of the diagonal members 31a and 31b are connected to the upper connecting portions 34a and 34b of the structure extending direction connecting members 9 and 10, respectively. Has been. At this time, the upper end portions of the diagonal members 31a and 31b and the upper end portions of the wall bodies 4 and 8 are fixed by welding via one or more steel connecting members (not shown), and the concrete superstructure 12 may be embedded.
[0068]
  The lower ends of the diagonal members 31a and 31b on the left and right sides may be fixed to both sides of one sheath tube 29 as shown in FIG. 29, or the two sheath tubes 29 are arranged in two upper and lower stages as shown in FIG. The lower end of the diagonal members 31a and 31b on both the left and right sides may be fixed to the upper and lower sheath tubes 29 separately by being overlapped with the columnar member 27. A plurality of dowels 35 are fixed to the inner peripheral surface of the sheath tube 29 and the outer peripheral surface of the columnar member 27 covered with the sheath tube 29, and a seal ring 36 is disposed on the inner peripheral portion of the lower end of the sheath tube 29 for grout injection The columnar member 27 and the sheath tube 29 are firmly formed by injecting and filling a time-curable material 33 such as mortar mixed with an underwater non-separable admixture into the gap between the columnar member 27 and the sheath tube 29 via a hose. It is fixed.
[0069]
  A hollow chamber 25 is provided between the front wall body 4, the rear wall body 8, and the hollow chamber bottom surface 25 a which is the water bottom surface 13 configured as described above. Then, the seawater enters and exits the hollow chamber 25 through the slits 3 and 7 in the upper part of the front and rear wall bodies 4 and 8, and the momentum of the waves is attenuated at this time, and the wave-dissipating effect is exhibited. In addition, since there is no medium-filled earth and sand in the hollow chamber 25, a large earth pressure does not act on the wall body at the time of an earthquake or the like, so that it is easy to secure the strength of the wall member members 2 and 6. The sheath tube 29 is disposed at the bottom of the hollow chamber 25, and the lower ends of the sheath tube 29 and the diagonal members 31 a and 31 b are filled between the lower surface 25 a (water bottom surface 13) and the seawater surface 17 of the hollow chamber 25. Located in seawater.
[0070]
  32 and 33 show a tenth embodiment. In the tenth embodiment, the upper ends (a) of the joints 1a, 1b and 5a, 5b made of steel pipes having the T-shaped steel joint 1 and the fitting groove 18 in the wall constituting members 2, 6 are the first. 9 is a higher level than that of the embodiment, embedded in the structure extension direction connecting members 9, 10, and impermeable wall bodies 4a, 8a having no slit for water passage are constructed on the upper part of the wall body. It is that you are. Other configurations are the same as those of the ninth embodiment.
[0071]
  In the tenth embodiment, the seawater in the hollow chamber 25 cannot enter and exit, and thus the wave-dissipating effect cannot be exhibited. However, in the same manner as in the first embodiment, the hollow chamber 25 is not filled with medium-filled earth and sand. Since a large earth pressure does not act on the wall body sometimes, there is an advantage that the strength of the wall body constituting members 2 and 6 can be easily secured.
[0072]
  34 and 35 show a water body structure according to the eleventh embodiment. In the eleventh embodiment, the upper part of the left wall 4 shown in the figure is constructed as a transmission wall 4b having a water passage slit 3, and the upper part of the right wall 4 shown in the figure is impermeable without a water passage slit. It is constructed in the wall body 8a. Other configurations are the same as those of the tenth embodiment.
[0073]
  36 and 37 show a water body structure according to the twelfth embodiment. In the twelfth embodiment, in the water body structure constructed with the front and rear wall members 2 and 6 in seawater, the lower layer 22 of the hollow chamber 25 has a predetermined distance from the hollow chamber bottom surface 25a (water bottom surface 13). A predetermined amount of filling material 21 is accommodated up to the height. A surface protective layer 26 is provided on the upper surface of the filling material 21, and this surface protective layer 26 is a horizontal plane that is flat in the front-rear direction in FIG. 36, and the front and rear joints 1 a, 1 b and The upper ends (a) of 5a and 5b are provided at slightly higher positions, and the upper portions are slits 3 and 7 for water passage. Further, the sheath tube 29 extrapolated to the columnar member 27 is provided above the surface protective layer 26 of the filling material 21 and below the seawater surface 17, and one sheath tube 29 is provided in the sheath tube 29. The lower end of the diagonal member 31a is fixed. Other configurations are the same as those in the tenth and eleventh embodiments.
[0074]
  In the twelfth embodiment, when the hollow chamber 25 is deep, or when the internal volume of the hollow chamber 25 is adjusted, it is possible to easily cope with this by adjusting the accommodation amount of the filling material 21. Operations such as a wave-dissipating effect are similar to those of the ninth embodiment. Further, the lower end portions of the sheath tube 29 and the diagonal material 31 a are located above the filling material 21.
[0075]
  38 and 39 show a water body structure according to the thirteenth embodiment. In the thirteenth embodiment, an example in which the lower ends of the left and right diagonal members 31a and 31b are fixed to the sheath tube 29 is shown. Other structures and operational effects are the same as those of the twelfth embodiment shown in FIG.
[0076]
  40 and 41 show a water body structure according to the fourteenth embodiment. In the fourteenth embodiment, the surface protective layer 26 provided on the upper surface of the filling material 21 is provided on the inclined surface so as to become lower from the rear to the front between the front and rear wall constituting members 2 and 6. In addition, the upper ends (a) of the front and rear joints 1a, 1b and 5a, 5b are provided at slightly higher positions than the front and rear ends of the slope, and the upper portions are water-feeding slits 3, 7. . In the fourteenth embodiment, since the surface protective layer 26 is provided on the slope, a wave-dissipating effect different from the twelfth and thirteenth embodiments is exhibited. Other configurations and operational effects are the same as those of the twelfth embodiment shown in FIG.
[0077]
  42 and 43 show a water body structure according to the fifteenth embodiment. In the fifteenth embodiment, the lower end portions of the sheath tube 29 and the left and right diagonal members 31a, 31b are embedded in the filling material 21 accommodated in the lower layer 22 of the hollow chamber 25 from the water bottom surface 13 to a predetermined height. Has been. Other configurations and operational effects are the same as those of the thirteenth embodiment shown in FIG.
[0078]
  44 and 45 show a water body structure according to the sixteenth embodiment. In the sixteenth embodiment, the upper ends (a) of the joints 1a, 1b and 5a, 5b made of steel pipes having the T-shaped steel joint 1 and the fitting groove 18 in the wall constituting members 2, 6 are the first. It is higher than the case of 15 embodiment, and it is embed | buried in the structure extension direction connection material 9,10, and the impervious wall body 4a, 8a without the slit for water flow is constructed | assembled in the upper part of a wall body. It is that you are. Other configurations and operational effects are the same as those of the fifteenth embodiment shown in FIG.
[0079]
  46 and 47 show a water body structure according to the seventeenth embodiment. In the seventeenth embodiment, the surface protective layer 26 provided on the upper surface of the filling material 21 is provided on an inclined surface so as to be lowered from the rear to the front between the front and rear wall constituting members 2 and 6. In addition, the upper ends (a) of the front and rear joints 1a, 1b and 5a, 5b are provided at slightly higher positions than the front and rear ends of the slope, and the upper part thereof is provided with slits 3 and 7 for water passage. Yes. In the seventeenth embodiment, since the surface protective layer 26 is provided on the slope, a wave-dissipating effect different from that of the fifteenth embodiment of FIG. 42 is exhibited. Other structures and operational effects are the same as those in the fifteenth embodiment.
[0080]
  48 and 49 show a water body structure according to an eighteenth embodiment. In the eighteenth embodiment, an example is shown in which the surface protection layer 26 provided on the upper surface of the filling material 21 is composed of a front slope 23 and a rear horizontal surface 24 between the front and rear wall constituting members 2, 6. ing. Further, the upper ends (a) of the front and rear joints 1a, 1b and 5a, 5b are provided at slightly higher positions than the front end of the front slope 23 and the rear end of the rear horizontal plane 24, and the water passage slit 3 is provided at the upper part of the wall body. , 7 are constructed of transmission wall bodies 4b and 8b. In the eighteenth embodiment, the water depth changing action by the front slope 23 and the synergistic effect of the water depth constant action by the rear horizontal surface 24 are provided. Other structures and operational effects are the same as those of the seventeenth embodiment shown in FIG.
[0081]
  50 and 51 show a water body structure according to a nineteenth embodiment. In the nineteenth embodiment, a transmission wall 4b having a water passage slit 3 is constructed on the upper part of the left wall member 2 shown in the figure, and there is no water passage slit on the upper part of the right wall member 6 shown in the figure. The impermeable wall 8a is constructed. Other structures and operational effects are the same as those in the eighteenth embodiment shown in FIG.
[0082]
  52 and 53 show a water body structure according to the twentieth embodiment. In the twentieth embodiment, the wave-dissipating protrusions 40 are provided in a predetermined range of the columnar member 27 or in the predetermined ranges of the diagonal members 31a and 31b to further improve the wave-dissipating effect. FIG. 52 shows an example in which the wave-dissipating protruding body 40 is provided on the columnar member 27, and FIG. 53 shows an example in which the wave-dissipating protruding body 40 is provided on the diagonal member 31a. Of course, the wave-dissipating protruding body 40 may be provided in any combination with the columnar member 27, the diagonal member 31a, and the diagonal member 31b (not shown).
[0083]
  FIG. 54 shows a structural example of the wave-dissipating protrusion 40 in a cross-sectional view. FIG. 54 a is an example in which a wave-dissipating protruding body 40 a having a cylindrical cavity 42 is constituted by reinforced concrete 41. In this case, the columnar member 27 or the diagonal members 31 a and 31 b are inserted into the cylindrical cavity 42, and then the mortar grout 43 is filled between the columnar member 27 or the diagonal members 31 a and 31 b and the cylindrical cavity 42 to erase the material. The wave projecting body 40a is disposed at a predetermined position.
[0084]
  FIG. 54 b shows an example in which a substantially rhombic wave-dissipating protruding body 40 b is constituted by the steel plate 44 and the steel pipe 45. In this case, the columnar member 27 or the diagonal members 31a, 31b are inserted into the steel pipe 45, and then the mortar grout 43 is filled between the columnar member 27 or the diagonal members 31a, 31b and the steel pipe 45, and the wave-dissipating projection is provided. The body 40b is arranged at a predetermined position.
[0085]
【The invention's effect】
  According to the present invention, in a double wall structure, an inertia force during an earthquake can be reduced by providing a hollow chamber between two rows of wall bodies. For this reason, unlike a conventional double wall structure, a large earth pressure does not act on the wall body due to the inertial force acting on the filling soil during an earthquake, and a large rotational force does not act on the entire structure. Therefore, it is not necessary to use a member having a large rigidity for the wall body, or to increase the shear resistance due to the filling soil by increasing the interval between the wall bodies, thereby reducing the construction cost.
[0086]
  Furthermore, in the present invention, a reflected wave countermeasure function and a seawater circulation function can be provided by providing a water passage slit at a predetermined position on one or both continuous walls.
[0087]
  Furthermore, in the present invention, when the continuous wall of the double wall structure is made into a transmission structure having a water passage slit or the like through which seawater can permeate, it plays the role of a water reserving chamber necessary to develop a wave-dissipating effect. Since it has a hollow chamber, it is possible to exhibit a wave-dissipating effect, reduce the reflected wave height, and allow seawater to pass therethrough, thereby preventing deterioration of the water quality in the levee.
[0088]
  In particular, in the present invention, by arranging columnar members and diagonal members, the horizontal direction required in places with severe wave conditions such as wave conditions such as deep and high wave areas, and inertial force and dynamic water pressure associated with earthquakes is required. A load bearing function (load bearing capacity, deformation performance) can be ensured.
[0089]
  In addition, by increasing or decreasing the number of columnar members or diagonal members and the member rigidity, it is possible to adjust and ensure the horizontal load resistance function (load resistance, deformation performance) as a structure. Further, by changing the interval between the two rows of wall bodies and the height and shape of the hollow chamber lower layer, it is possible to adjust the inertial force and the wave-absorbing function acting on the filling soil.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing a water structure having a water reserving chamber according to a first embodiment of the present invention.
2A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 1, and FIG. 2B is a detailed view of the joint in FIG.
FIG. 3 is a view showing a modified example of the water structure according to the first embodiment.
FIG. 4 is a view showing a modified example of the water structure according to the first embodiment.
FIG. 5 is a view showing a modification of the water body structure according to the first embodiment.
FIG. 6 is a view showing a modified example of the water structure according to the first embodiment.
FIG. 7 is a view showing a modification of the water body structure according to the first embodiment.
FIG. 8 is a view showing a modified example of the water body structure according to the first embodiment.
FIG. 9 is a longitudinal side view showing a water structure having a water reserving chamber according to a second embodiment of the present invention.
10A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 3, and FIG. 10B is a detailed view of the joint in FIG.
FIG. 11 is a longitudinal side view showing a water body structure having a water reservoir according to a third embodiment of the present invention.
12A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 5, and FIG. 12B is a detailed view of the joint in FIG.
FIG. 13 is a view showing a modification of the water body structure according to the third embodiment.
FIG. 14 is a vertical side view showing a water body structure having a water reservoir according to a fourth embodiment of the present invention.
15A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 7, and FIG. 15B is a detailed view of the joint in FIG.
FIGS. 16A, 16B, and 16C show an example in which the upper surface covered with the surface protective layer of the hollow chamber is an inclined surface that is inclined at the same angle, an example that includes the inclined surface and a horizontal plane, and a horizontal plane. It is explanatory drawing by which the example which consists only of was shown.
FIG. 17 is a longitudinal side view showing a water body structure having a water chamber with the upper surface of the hollow chamber covered with a surface protective layer and the back surface filled with a backing material.
18A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 17, and FIG. 18B is a detailed view of the joint in FIG.
FIG. 19 is a longitudinal sectional side view showing a water body structure having a water reserving chamber in which the upper surface of a hollow chamber is covered with a surface protective layer and the back surface is filled with a backing material.
20A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 19, and FIG. 20B is a detailed view of the joint in FIG.
FIG. 21 is a longitudinal side view showing a water body structure having a water reservoir according to a fifth embodiment of the present invention.
22A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 21, and FIG. 22B is a detailed view of the joint in FIG.
FIG. 23 is a longitudinal side view showing a water body structure having a water reservoir according to a sixth embodiment of the present invention.
24A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 22, and FIG. 24B is a detailed view of the joint in FIG.
FIG. 25 is a longitudinal side view showing a water body structure having a water reservoir according to a seventh embodiment of the present invention.
26A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 25, and FIG. 26B is a detailed view of the joint in FIG.
FIG. 27 is a longitudinal side view showing a water body structure having a water reservoir according to an eighth embodiment of the present invention.
28A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 27, and FIG. 28B is a detailed view of the joint in FIG.
FIG. 29 is a vertical side view showing a water structure having a water chamber according to a ninth embodiment of the present invention.
30A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 29, and FIG. 30B is a detailed view of the joint in FIG.
FIG. 31 is an enlarged cross-sectional view showing a coupling structure between a columnar member and a sheath tube at the lower end of the diagonal member.
FIG. 32 is a longitudinal side view showing a water body structure having a water reservoir according to a tenth embodiment of the present invention.
33 (A) is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 32, and (B) is a detailed view of the joint in FIG. (A).
FIG. 34 is a longitudinal side view showing a water body structure having a water reservoir according to an eleventh embodiment of the present invention.
35A is an explanatory plan view showing an arrangement mode of the wall constituting members in FIG. 34, and FIG. 35B is a detailed view of the joint in FIG.
FIG. 36 is a longitudinal side view showing a water body structure having a water reservoir according to a twelfth embodiment of the present invention.
37A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 36, and FIG. 37B is a detailed view of the joint in FIG.
FIG. 38 is a longitudinal side view showing a water body structure having a water reservoir according to a thirteenth embodiment of the present invention.
39 (A) is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 38, and (B) is a detailed view of the joint in FIG. (A).
FIG. 40 is a longitudinal side view showing a water body structure having a water reservoir according to a fourteenth embodiment of the present invention.
41A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 40, and FIG. 41B is a detailed view of the joint in FIG.
FIG. 42 is a longitudinal side view showing a water body structure having a water reservoir according to a fifteenth embodiment of the present invention.
43 (A) is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 42, and (B) is a detailed view of the joint in FIG. (A).
FIG. 44 is a longitudinal side view showing a water body structure having a water reservoir according to a sixteenth embodiment of the present invention.
45A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 44, and FIG. 45B is a detailed view of the joint in FIG.
FIG. 46 is a longitudinal sectional side view showing a water body structure having a water reservoir according to a seventeenth embodiment of the present invention.
47A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 46, and FIG. 47B is a detailed view of the joint in FIG.
FIG. 48 is a vertical sectional side view showing a water body structure having a water reservoir according to an eighteenth embodiment of the present invention.
49A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 48, and FIG. 49B is a detailed view of the joint in FIG.
FIG. 50 is a longitudinal side view showing a water body structure having a water reservoir according to a nineteenth embodiment of the present invention.
51A is an explanatory plan view showing the arrangement of the wall constituting members in FIG. 50, and FIG. 51B is a detailed view of the joint in FIG.
FIG. 52 is a vertical side view showing a water body structure according to a twentieth embodiment of the present invention, and shows an example in which a columnar member is provided with a wave-dissipating protruding body.
FIG. 53 is a longitudinal side view showing a water body structure according to a twentieth embodiment of the present invention, and shows an example in which a wave-dissipating protrusion is provided on an oblique member.
54A is a transverse cross-sectional view of a wave-dissipating projecting body made of reinforced concrete, and FIG. 54B is a cross-sectional view of a wave-dissipating projecting body made of a steel plate and a steel pipe.
[Explanation of symbols]
  1 Steel fitting
  1a, 1b fitting
  2 Wall components
  3 slits for water flow
  4 walls
  4a Impervious wall
  4b Transmission wall
  5a, 5b fitting
  6 Wall components
  7 slits for water flow
  8 Wall
  8a Impervious wall
  8b Transmission wall
  9, 10 Structure extension direction connecting material
  11 Cross-section connecting material
  12 Concrete superstructure
  13 Water bottom
  14 Wave-dissipating protrusion
  15 Wave-dissipating step
  15 Wave-dissipating step
  16 Inclined bottom surface for wave absorption
  17 Sea level
  18 Fitting groove
  20 Foundation ground
  21 Filling material
  22 Hollow chamber lower layer
  23 slope
  24 horizontal plane
  25 Hollow chamber
  25a hollow chamber bottom
  26 Surface protective layer
  27 Columnar member
  28 Backing material
  29, 29a, 29b sheath tube
  31a, 31b diagonal
  32a, 32b, 32c Upper connecting part
  33 Time-cure materials
  35 Giber
  36 Seal ring
  40 Projection body for wave dissipation
  40a Projection body for wave dissipation
  40b Projection body for wave absorption
  41 reinforced concrete
  42 Cylindrical space
  43 Mortar Grout
  44 Steel plate
  45 steel pipe

Claims

First joint to a predetermined location (1a), a number of first wall constituting member having a second joint (1b) and (2), the first joint (1a), a second joint (1b ) Are fitted and arranged on the foundation ground (20) by means such as placing, and the first wall body (4) is formed, and is opposed to the first wall body (4) at a predetermined interval. in position, the third joint at a predetermined location (5a), the fourth joint (5b) a number of second wall constituting member having a (6), said third joint (5a), fourth head of the joint (5b) Mate constitute a second wall disposed by means of the punching設等(8) to the foundation ground (20), said first wall constituting member (2) of parts are connected by a first structure extending direction connecting member (9), the head of the second wall constituting member (6) is connected by a second structure extending direction connecting member (10), wherein First The head of the wall (4) and the second wall (8) is connected by a cross-sectional direction connecting member (11), said first structure extension direction connecting member (9) the cross-directional connecting member ( 11) A first upper coupling part (A) is formed so as to include an intersection with the second structure extension direction connection member (10) and the cross-section direction connection member (11). Thus, the second upper coupling portion (B) is formed, and a hollow chamber (25) having a bottom surface (25a) as a water bottom surface between the first wall body (4) and the second wall body (8) is formed. )
A transmission wall body (4b) in which a first water passage slit (3) is formed at a predetermined position from the water bottom (13) to the lower surface of the cross-sectional connection member (11),
When the width of the first water passage slit (3) is D1 and the arrangement interval of the second wall member (6) is D2, D1 / D2 is set to 5 to 35%,
One or more wave-dissipating protrusions (14) are provided on the lower surface of the cross-section direction connecting member (11) .

The water structure according to claim 1, wherein when a plurality of the wave-dissipating protrusions (14) are provided, the length is changed stepwise in the front-rear direction.

First joint to a predetermined location (1a), a number of first wall constituting member having a second joint (1b) and (2), the first joint (1a), a second joint (1b ) Are fitted and arranged on the foundation ground (20) by means such as placing, and the first wall body (4) is formed, and is opposed to the first wall body (4) at a predetermined interval. in position, the third joint at a predetermined location (5a), the fourth joint (5b) a number of second wall constituting member having a (6), said third joint (5a), fourth head of the joint (5b) Mate constitute a second wall disposed by means of the punching設等(8) to the foundation ground (20), said first wall constituting member (2) of parts are connected by a first structure extending direction connecting member (9), the head of the second wall constituting member (6) is connected by a second structure extending direction connecting member (10), wherein First The head of the wall (4) and the second wall (8) is connected by a cross-sectional direction connecting member (11), said first structure extension direction connecting member (9) the cross-directional connecting member ( 11) A first upper coupling part (A) is formed so as to include an intersection with the second structure extension direction connection member (10) and the cross-section direction connection member (11). Thus, the second upper coupling portion (B) is formed, and a hollow chamber (25) having a bottom surface (25a) as a water bottom surface between the first wall body (4) and the second wall body (8) is formed. )
A transmission wall body (4b) in which a first water passage slit (3) is formed at a predetermined position from the water bottom (13) to the lower surface of the cross-sectional connection member (11),
When the width of the first water passage slit (3) is D1 and the arrangement interval of the second wall member (6) is D2, D1 / D2 is set to 5 to 35%,
An aquatic structure characterized in that a wave-dissipating step (15) is provided on the lower surface of the cross-section direction connecting member ( 11 ) and the front is low and the back is low .

When a plurality of the wave-dissipating steps (15) are provided, the length is changed stepwise in the front-rear direction, and / or the wave-dissipating steps are also provided on the upper surface of the cross-sectional coupling member (11). The water area structure according to claim 3, wherein a step (15a) for wave absorption opposite to the step is provided in a step shape to impart a hydrophilic function.

The third joint (5a), the fourth joint (5b) is arranged in a fitted state in succession to the inside of the second structure extending direction connecting member from a predetermined position under the water bottom (10), opaque The water body structure according to any one of claims 1 to 4, wherein the wall body (8a) is constituted.

The third joint (5a), the fourth joint (5b) is arranged in a fitted state continuously until a predetermined position of the underwater from a predetermined position under the water bottom, the third joint (5a), the fourth The transmission wall body (8b) which formed the 2nd slit (7) for water flow in the upper part of a joint (5b) is comprised, The any one of Claims 1-4 characterized by the above-mentioned. Water structure.

The first water passage slit (3) is configured to be submerged, or the first joint (1a) and the second joint (1b) are a seawater surface (17) and a water bottom (13). The water area structure according to claim 1 or 3, wherein the water area structure is provided between the two.

The transmission wall body (8b) having the second water passage slit (7) is formed at a predetermined position between the bottom surface of the water and the lower surface of the second structure extension direction connecting member (10). The water structure according to any one of claims 1 to 4.

In the cross-sectional direction, at least one columnar member (27) is disposed on the foundation ground (20) at the intermediate portion between the first wall body (4) and the second wall body (8) by means such as placing, The water body structure according to any one of claims 1 to 8, wherein the head of the columnar member (27) is connected to at least the cross-sectional connecting member (11).

The hollow chamber (25) between the first wall body (4) and the second wall body (8) is filled with the filling material (21) to a predetermined height to form the hollow chamber lower layer (22). The top end height of the filling material (21) on the first wall (4) side is lower than the top end height of the fitted first joint (1a) and second joint (1b). , lower than the crest height of the third joint crest height of the side of the second wall of the middle packed material (21) (8) that is fitted (5a), the fourth joint (5b) The water structure according to any one of claims 1 to 9, wherein

The surface structure of a hollow chamber lower layer (22) is arbitrary shapes, such as a horizontal surface, a slope, or its combination, The water body structure of Claim 10 characterized by the above-mentioned.

The water body structure according to claim 10, wherein a surface protective layer (26) is provided on the surface of the hollow chamber lower layer (22).

One sheath tube (29) is extrapolated to an intermediate portion of the columnar member (27), and the lower end portion of at least one first diagonal member (31a) is connected to the sheath tube (29), An upper end portion of the first diagonal member (31a) is connected to a second upper coupling portion (B), and a gap between the sheath tube (29) and the columnar member (27) is formed with time such as mortar. The water structure according to claim 9 , wherein the structure is filled with a curable material (33).

At least one sheath tube (29) is extrapolated to an intermediate portion of the columnar member (27), and a lower end portion of the first diagonal member (31a) is connected to one side surface of the sheath tube (29), The upper end portion of the first diagonal member (31a) is connected to the second upper coupling portion (B), and the lower end portion of the second diagonal member (31b) is connected to the other side surface of the sheath tube (29). Connected, the upper end of the second diagonal member (31b) is connected to the first upper joint (A), and a mortar is provided in the gap between the sheath tube (29) and the columnar member (27). The water structure according to claim 9 , which is filled with a time-curable material (33).

At least two sheath pipes (29a) and a sheath pipe (29b) are extrapolated in the middle part of the columnar member (27), and a first diagonal member ( 31a) is connected to the lower end, and the upper end of the first diagonal member (31a) is connected to the second upper coupling part (B), and the sheath pipe (29b) is arranged on the upper side of the sheath pipe (29a). the other side of) is connected the lower end portion of the second diagonal member (31b), the upper end portion of the second diagonal member (31b) is connected to the first upper binding section (a), the sheath tube (29a) and sheath pipe (29 b) and of claim 9, wherein the time-curable material of the mortar or the like in the air gap between the pillars (27) (33) is characterized in that it is filled Water structure.

The sheath pipe (29) is arranged at a predetermined position between the upper surface of the foundation ground (20) and the lower surface of the cross-section direction connecting member (11), according to any one of claims 13 to 15. Water structures.

The water body structure according to claim 9 , wherein a wave-extending projecting body (40) is provided in a predetermined range of the columnar member (27).

In the predetermined range of the first diagonal member (31a) and the second diagonal member (31b), or the first diagonal member (31a) or the second diagonal member (31b), the wave-dissipating protruding body (40) The water area structure according to any one of claims 9 to 17, wherein the water structure is provided.

The water body structure according to any one of claims 1 to 18, wherein the first wall member (2) and the second wall member (6) are steel sheet piles.

The water body structure according to claim 5, wherein the wall member constituting the impermeable wall (8a) is a steel sheet pile.

The water structure according to claim 9 , wherein the columnar member (27) is a steel pipe pile.

The water structure according to any one of claims 1 to 21, wherein a backing material (28) is disposed up to a suitable height behind the second wall (8).