JPS6342046B2 - - Google Patents
Info
- Publication number
- JPS6342046B2 JPS6342046B2 JP55044833A JP4483380A JPS6342046B2 JP S6342046 B2 JPS6342046 B2 JP S6342046B2 JP 55044833 A JP55044833 A JP 55044833A JP 4483380 A JP4483380 A JP 4483380A JP S6342046 B2 JPS6342046 B2 JP S6342046B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- casing
- hole
- auger
- case
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002689 soil Substances 0.000 claims description 33
- 238000010276 construction Methods 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 14
- 239000008267 milk Substances 0.000 claims description 14
- 210000004080 milk Anatomy 0.000 claims description 14
- 235000013336 milk Nutrition 0.000 claims description 14
- 239000004570 mortar (masonry) Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 6
- 238000004898 kneading Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 210000003746 feather Anatomy 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Description
【発明の詳細な説明】
本発明は、節杭等との基礎杭を無音無振動に加
えて特に殆ど無排土で施工する基礎杭施工法およ
びこれに用いるケースオーガーに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a foundation pile construction method for constructing foundation piles with knotted piles and the like without noise and vibration, and in particular, with almost no soil removal, and to a case auger used therein.
基礎杭を無音無振動で施工する工法に、スクリ
ユーオーガーで地盤を掘孔し、該孔内にセメント
ミルク等を注入した後、既製杭を孔内に圧入する
所謂先掘工法、セメントミルク注入工法等がある
が、これらの工法には次のような欠点がある。 A method of constructing foundation piles silently and without vibration is the so-called pre-drilling method, which involves digging a hole in the ground with a screw auger, injecting cement milk, etc. into the hole, and then press-fitting a ready-made pile into the hole, and cement milk injection. There are various construction methods, but these methods have the following drawbacks.
掘孔後、既製杭圧入までの間に杭周地盤が特
に上部において弛緩、崩壊し易く、杭支持力が
低下する。 After the hole is dug and until the ready-made pile is pressed in, the ground surrounding the pile tends to loosen and collapse, especially in the upper part, reducing the pile supporting capacity.
スクリユーオーガーで掘孔するため、排土量
が多く、施工敷地が泥土化して作業能率が低下
する。 Since the holes are dug with a screw auger, a large amount of soil is removed, and the construction site becomes muddy, reducing work efficiency.
排土の処理および場外への搬出経費が大であ
る。 The cost of processing waste soil and transporting it off-site is large.
そこで本発明は、上記基礎杭施工工法における
従来の欠点を排除するを目的とし、ケーシング下
部を径小にして該径小部の外周にケーシング上部
と略同外径のスクリユー羽根および撹乱刃を設け
た独特なケースオーガーを用いて、掘削土砂を孔
周地盤に圧し付けることにより殆ど無排土で掘孔
を行ない、その作業性を良くし、かつ孔周地盤を
効率よく締固めて杭圧入までの孔壁崩壊を防止す
るとともに杭支持力を高め、さらに掘削土砂の一
部を根固め用ソイルモルタル造成に利用して工費
節減を図ろうとしたものであり、またこの基礎杭
施工法の実施に使用する削孔装置として特に好適
なケースオーガーをも提供するものである。 Therefore, the present invention aims to eliminate the conventional drawbacks of the above-mentioned foundation pile construction method, by reducing the diameter of the lower part of the casing and providing screw blades and disturbance blades with approximately the same outer diameter as the upper part of the casing around the outer periphery of the reduced diameter part. Using a unique case auger, the excavated soil is pressed onto the ground around the hole, making it possible to excavate the hole with almost no soil removal, improving workability, and efficiently compacting the ground around the hole until pile press-in. The aim was to prevent the collapse of the hole walls, increase the pile bearing capacity, and use some of the excavated earth and sand to create soil mortar for foot protection, thereby reducing construction costs. A case auger is also provided which is particularly suitable as a drilling device for use.
以下に本発明の実施態様を使用装置とともに図
面に基いて説明する。 Embodiments of the present invention will be described below with reference to the drawings together with the apparatus used.
まず、本発明の基礎杭施工法に直接用いる削孔
装置の好適なものを示す第１図〜第３図のケース
オーガーＡにおいて、１はケースオーガーＡの本
体となるケーシングであり、このケーシング１の
上部は掘削孔径と略同径に、下部はそれより径小
に形成されている。ケーシング下部の径小部１ａ
としては第１図のようにケーシング上部１ｂから
漸次先端ほど径小のテーパ状に形成する場合と、
第２図のようにテーパをつけずに段落的に径小に
して単なる円筒状に形成する場合とがある。いず
れの場合にも、径小部１ａの先端つまりケーシン
グ１の先端にはセメントミルク注入用のノズル部
２をおよび先堀刃３を設ける。また径小部１ａの
胴部外周にはケーシング上部１ｂと略同外径のス
クリユー羽根４を固着するとともに、このスクリ
ユー羽根４の条間に多数の突起状の撹乱刃５を所
要間隔に配して付設する。これらの撹乱刃５は通
常スクリユー羽根４に対応してその螺条方向と同
方向に所要間隔毎の列状をなすように配列して付
設するもので、図のように各撹乱刃５をスクリユ
ーへ羽根４の条間略中央に一列に付設する場合の
ほか、二列等の複数列に、または千鳥に配列して
付設する等、種々の実施が可能である。この各撹
乱刃５の先端回転径はスクリユー羽根４つまりケ
ーシング上部１ｂの外径と略同径とする。 First, in the case auger A shown in FIGS. 1 to 3, which shows a suitable drilling device for direct use in the foundation pile construction method of the present invention, 1 is a casing that is the main body of the case auger A, and this casing 1 The upper part is formed to have approximately the same diameter as the borehole diameter, and the lower part is formed to have a smaller diameter. Small diameter part 1a at the bottom of the casing
As shown in Fig. 1, the diameter is gradually reduced from the top 1b of the casing to the tip.
As shown in FIG. 2, there are cases in which the diameter is reduced stepwise and formed into a simple cylindrical shape without a taper. In either case, a nozzle portion 2 for injecting cement milk and a tip-drilling blade 3 are provided at the tip of the small diameter portion 1a, that is, the tip of the casing 1. Further, screw blades 4 having approximately the same outer diameter as the casing upper part 1b are fixed to the outer periphery of the body of the small diameter portion 1a, and a large number of protruding disturbance blades 5 are arranged at required intervals between the rows of the screw blades 4. attached. These disturbance blades 5 are normally attached to the screw blades 4 and arranged in rows at required intervals in the same direction as the thread direction of the screw blades. In addition to the case where the blades are attached in a single row approximately in the center between the rows of the blades 4, various implementations are possible, such as attaching them in multiple rows such as two rows, or in a staggered arrangement. The rotating diameter of the tip of each of the disturbance blades 5 is approximately the same as the outer diameter of the screw blade 4, that is, the casing upper part 1b.
なお、上記スクリユー羽根４の外径及び撹乱刃
５の先端回転径を、ケーシング上部１ｂの外径と
略同径のものとして、これより僅かに径大にした
場合には、ケーシング１ｂにもスクリユー羽根４
および撹乱刃５を第３図のように径小部１ａから
延長あるいは配列して付設することがある。 Note that if the outer diameter of the screw blade 4 and the rotational diameter of the tip of the disturbance blade 5 are approximately the same as the outer diameter of the casing upper part 1b, but slightly larger than these, the screw blade will also be formed in the casing 1b. Feather 4
Also, the disturbance blades 5 may be extended or arranged from the small diameter portion 1a and attached as shown in FIG.
図中、６はノズル部２と連通したセメントミル
ク用送圧管、７は減速機等を組込んだ駆動モー
タ、８は連接部である。 In the figure, 6 is a cement milk pressure pipe communicating with the nozzle part 2, 7 is a drive motor incorporating a reducer, etc., and 8 is a connecting part.
次に上記構成のケースオーガーＡを用いた本発
明の施工法を具体的に説明する。 Next, the construction method of the present invention using the case auger A having the above configuration will be specifically explained.
まず、上記のケースオーガーＡにより基礎杭打
設地盤を回転削孔すると、掘削土砂はケーシング
下部の径小部１ａに有するスクリユー羽根４によ
り押し上げられ上昇するが、径小部１ａであるケ
ーシング下部においても掘削土砂が孔周地盤にあ
る程度圧し付けられるため、はじめのちは地上に
排土されることがあつてもその量はごく少なく、
しかも掘孔が進んでケーシング上部１ｂが孔内に
進入するのに従つて、スクリユー羽根４を伝わつ
て上昇する土砂は径大のケーシング上部１ｂによ
り孔周地盤に圧し付けられ、その結果孔周地盤が
圧密化する。 First, when the foundation pile driving ground is rotary drilled using the case auger A, the excavated soil is pushed up by the screw blade 4 provided in the small diameter part 1a at the lower part of the casing and rises. Since the excavated soil is pressed to some extent into the ground around the hole, even if the soil is initially discharged to the ground, the amount is very small.
Moreover, as the borehole progresses and the upper part 1b of the casing enters the hole, the earth and sand rising through the screw blades 4 is pressed against the ground around the hole by the upper part 1b of the casing, which has a large diameter. becomes compacted.
殊にスクリユー羽根４がケーシング上部と略同
外径をなし、このスクリユー羽根４による掘削孔
径がケーシング上部１ｂと略同径となるため、ス
クリユー羽根４によりケーシング上部１ｂの部分
に押し上げられる掘削土砂は該ケーシング上部１
ｂの周面によつて孔周地盤に対し強く圧し付けら
れる。従つて大部分の土砂が孔周地盤に圧し付け
られて、孔周地盤、中でも上部が圧密化し、地上
に排土されることがない。 In particular, the screw blade 4 has approximately the same outer diameter as the upper part of the casing, and the diameter of the hole drilled by the screw blade 4 has approximately the same diameter as the upper part 1b of the casing. The upper part of the casing 1
It is strongly pressed against the ground around the hole by the circumferential surface of b. Therefore, most of the earth and sand is pressed against the ground around the hole, and the ground around the hole, especially the upper part, becomes compacted and is not discharged to the ground.
そして掘孔がさらに進み所定の深度に達すれ
ば、ケースオーガーＡを逆転させ、同時にケース
オーガー先端のノズル部２よりセメントミルクを
注入する。そうすると、ケースオーガーＡの逆転
によりスクリユー羽根４間に残つた土砂はスクリ
ユー羽根を伝わつて下降するとともに、スクリユ
ー羽根間に設けた撹乱刃５により撹乱され、さら
に注入セメントミルクと混合され、撹拌、混練さ
れてソイルモルタルＢが造成される。もちろんこ
のときケースオーガーＡを正転させることも可能
である。いずれにしても、本発明のケースオーガ
ーＡにはスクリユー羽根４の条間に撹乱刃５が設
けられているため、この撹乱刃５によりセメント
ミルクと掘削土砂との撹拌、混練が一層万遍にか
つ能率的に行なわれ、良好なソイルモルタルが造
成される。またこの時、ケースオーガーＡを回転
させたまま上下させれば、撹拌、混練作用がより
良好に行なわれることはいうまでもない。 When the hole progresses further and reaches a predetermined depth, the case auger A is reversed, and at the same time, cement milk is injected from the nozzle part 2 at the tip of the case auger. Then, due to the reversal of the case auger A, the soil remaining between the screw blades 4 descends through the screw blades, is disturbed by the stirring blade 5 provided between the screw blades, and is further mixed with the injected cement milk for stirring and kneading. Soil mortar B is created. Of course, it is also possible to rotate the case auger A in the normal direction at this time. In any case, since the case auger A of the present invention is provided with a disturbance blade 5 between the rows of the screw blades 4, the disturbance blade 5 makes it possible to mix and knead the cement milk and the excavated soil more evenly. Moreover, it is carried out efficiently and good soil mortar is created. Further, at this time, it goes without saying that if the case auger A is moved up and down while rotating, the stirring and kneading action can be performed better.
なお、上記において、掘削土砂とセメントミル
クの撹拌、混練は所定深度まで掘孔した後に行な
つているが、地盤の土質状況によつては掘進時に
セメントミルクを注入して撹拌、混合を行なつて
もよくく、この場合にもスクリユー羽根間に撹乱
刃を設けたから、ケースオーガーの正転掘孔にも
拘らず、良好なソイルモルタルが造成される。 Note that in the above, stirring and mixing of the excavated soil and cement milk is done after the hole has been dug to a specified depth, but depending on the soil condition of the ground, cement milk may be injected and stirred and mixed during excavation. In this case as well, since a disturbance blade is provided between the screw blades, a good soil mortar can be created despite the normal rotation of the case auger.
上記のようにソイルモルタルを練成してケース
オーガーＡを地上に引き上げる。この際、スクリ
ユー羽根４の外径および撹乱刃５の先端回転径の
いずれもケーシング上部１ｂの外径と略同径であ
るために、このスクリユー羽根４および撹乱刃５
がケーシング上部１ｂにより圧密化し締固められ
た孔周壁の部分を削ることなく引き上げることが
できる。この引き上げ後、ソイルモルタルＢが未
硬化のうちに掘孔内に節杭等の既製杭Ｃを圧入す
ればよく、ソイルモルタルＢは既製杭Ｃの先端部
および杭周囲にゆきわたり、その後養生硬化して
既製杭Ｃを根固めするもので、これにより杭周地
盤を締固めかつ根固めした支持力の大なるモルタ
ル節杭等の基礎杭が造成施工される。 Prepare soil mortar as described above and lift case auger A to the ground. At this time, since both the outer diameter of the screw blade 4 and the rotational diameter of the tip of the stirring blade 5 are approximately the same as the outer diameter of the casing upper part 1b, the screw blade 4 and the stirring blade 5 are
can be pulled up without scraping the part of the hole peripheral wall that has been consolidated and compacted by the casing upper part 1b. After this lifting, ready-made piles C such as knot piles can be press-fitted into the borehole while the soil mortar B is not hardened, and the soil mortar B spreads around the tip of the ready-made pile C and around the pile, and then cures and hardens. This method is used to compact the ground around the pile and harden it to create foundation piles such as mortar knot piles with a large bearing capacity.
上記において、ソイルモルタルＢの必要量は掘
孔容積全量を要するものでなく、掘孔内に既製杭
Ｃを挿入した場合に、ソイルモルタルＢが地上に
溢れ出ない量が最良で、掘杭ボリユームV1−既
製杭ボリユームV2＝V3に想到する。従つてセメ
ントミルクと混練される掘削土砂の一部は、セメ
ントミルクと混練されてV3になる量でよく、ス
クリユー羽根４間に残置される掘削土砂の量が前
記のごとくなるよう、ケースオーガーＡの径小部
１ａの径、テーパ、長さ等が設定される。 In the above, the required amount of soil mortar B does not require the entire volume of the excavation hole, but the best amount is the amount that will not overflow the soil mortar B to the ground when the ready-made pile C is inserted into the excavation hole. Consider V 1 − ready-made pile volume V 2 =V 3 . Therefore, some of the excavated soil to be mixed with cement milk may be mixed with cement milk in an amount of V 3 , and the amount of excavated soil left between the screw blades 4 is as described above. The diameter, taper, length, etc. of the small diameter portion 1a of A are set.
以上のように本発明に係る基礎杭施工法は、ケ
ーシング下部を径小にして該径小部の外周にケー
シング上部と略同外径のスクリユー羽根を固着し
た独特なケースオーガーを用いて杭施工を行なう
ものであつて、スクリユー羽根により押し上げら
れる殆どの掘削土砂はケーシング周面特に上部周
面にて孔周地盤に対し圧し付けられて地上に排出
されることがなく、殆ど無排土で掘孔施工でき、
施工敷地が泥土化するおそれがなく、排土の場外
への搬出等の処理も不要で、作業性及び能率が非
常にアツプする。 As described above, the foundation pile construction method according to the present invention uses a unique case auger in which the lower part of the casing has a reduced diameter and a screw blade with approximately the same outer diameter as the upper part of the casing is fixed to the outer periphery of the reduced diameter part. Most of the excavated soil pushed up by the screw blades is pressed against the ground around the hole at the periphery of the casing, especially on the upper periphery, and is not discharged to the ground. Holes can be constructed,
There is no risk that the construction site will turn into mud, and there is no need to carry waste soil out of the site for treatment, greatly increasing workability and efficiency.
しかも前記のケーシング周面による孔周地盤に
対する掘削土砂の圧し付け作用によつて孔周地盤
の圧密化、中でもケーシング上部が進入する上部
における圧密化によつて締固められるため、掘削
後の既製杭圧入までの間に孔周地盤が弛緩、崩壊
することがなく、ソイルモルタルによる根固め効
果が一層高められ、杭支持力が著しく安定する。 Moreover, the ground around the hole is compacted by the pressing action of the excavated earth and sand against the ground around the hole by the casing circumferential surface, especially the upper part where the upper part of the casing enters. The ground around the hole does not loosen or collapse during the press-in period, and the soil mortar's foot hardening effect is further enhanced, resulting in significantly stable pile bearing capacity.
殊に本発明によれば、スクリユー羽根の条間に
残置する掘削土砂の一部を利用し、これとケース
オーガー先端より注入するセメントミルク等とを
撹乱、混練して、杭周囲固め用のソイルモルタル
を造成するため、通常のモルタルを使用する場合
に比し経済的であり、上記排土の搬出経費が不要
となることとも相埃つて工費節減を図ることがで
きる。 In particular, according to the present invention, a portion of the excavated soil left between the rows of the screw blades is used, and this is mixed and mixed with cement milk or the like injected from the tip of the case auger to form soil for hardening around the pile. Since mortar is created, it is more economical than when using normal mortar, and the cost of transporting the above-mentioned soil is not required, which also helps to reduce construction costs.
さらに上記工法に用いるケースオーガーは、ケ
ーシング下部の径小部にケーシング上部と略同外
径のスクリユー羽根を固着したので、スクリユー
羽根による回転削孔とケーシング上部による掘削
土砂の孔周地盤の押圧作用とが不都合なく良好に
行なわれ、またスクリユー羽根の条間に先端回転
径がケーシング上部と略同外径をなす多数の撹乱
刃を所要間隔に配して付設したので、セメントミ
ルクと掘削土砂の一部との撹拌、混練作用がきわ
めて良好に能率よく行なわれ、しかもケースオー
ガーの引き抜きの際にスクリユー羽根や撹乱刃に
よつて圧密化した孔周壁を削る等のおそれもな
く、孔周壁の崩壊のおそれがなく、以て上記本発
明の基礎杭施工を好適に実施できるものである。 Furthermore, the case auger used in the above construction method has screw blades with approximately the same outer diameter as the upper part of the casing fixed to the small diameter part of the lower part of the casing, so the screw blade acts to rotate the hole and the upper part of the casing presses the excavated earth and sand against the ground around the hole. This was done well without any inconvenience, and since a large number of disturbance blades whose tip rotational diameter was approximately the same outside diameter as the upper part of the casing were attached at required intervals between the screw blades, cement milk and excavated soil were Stirring and kneading with a part of the hole are carried out very well and efficiently, and there is no risk of scraping the consolidated peripheral wall of the hole by the screw blades or stirring blades when the case auger is pulled out, resulting in collapse of the peripheral wall of the hole. Therefore, the foundation pile construction of the present invention described above can be carried out suitably.
図は本発明の実施例を示すものであつて、第１
図、第２図および第３図はそれぞれ削孔装置であ
るケースオーガーの正面図、第４図〜第７図は施
工順を示す縦断面図である。
Ａ……ケースオーガー、１……ケーシング、１
ａ……ケーシング下部の径小部、１ｂ……ケーシ
ング上部、２……ノズル部、３……先堀刃、４…
…スクリユー羽根、５……撹乱刃。
The figure shows an embodiment of the present invention.
2 and 3 are front views of a case auger, which is a hole-drilling device, and FIGS. 4 to 7 are longitudinal cross-sectional views showing the construction order. A...Case auger, 1...Casing, 1
a... Small diameter part at the bottom of the casing, 1b... Upper part of the casing, 2... Nozzle part, 3... Sakibori blade, 4...
...screw feather, 5...disturbing blade.
Claims (1)
にケーシング上部と略同外径のスクリユー羽根を
固着するとともに、このスクリユー羽根の条間に
先端回転径がスクリユー羽根と略同径をなす多数
の撹乱刃を所要間隔に配して付設してなるケース
オーガーを用い、該ケースオーガーにより目的地
盤を回転削孔するとともに、ケーシング下部より
径大のケーシング上部の孔内への進入後はスクリ
ユー羽根により押し上げられる掘削土砂を前記ケ
ーシング上部の周面にて孔周地盤に圧し付けなが
ら掘孔し、所定深度到達後はケースオーガー先端
より注入されたセメントミルクとスクリユー羽根
の条間に残つた掘削土砂の一部とをケースオーガ
ーの回転により撹拌、混練しつつケースオーガー
を引き上げ、次いで掘孔内に造成されたソイルモ
ルタルが未硬化のうちに既成杭を圧入することを
特徴とする基礎杭施工法。 ２ 撹拌、混練時はケースオーガーを逆回転させ
る特許請求の範囲第１項記載の基礎杭施工法。 ３ ケーシングの上部を掘削孔径と略同径に、下
部をそれより径小に形成し、該径小部の胴部外周
には前記ケーシング上部と略同外径のスクリユー
羽根を固着するとともに、このスクリユー羽根の
条間に先端回転径がスクリユー羽根と略同径をな
す多数の撹乱刃を所要間隔に配して付設したこと
を特徴とするケースオーガー。 ４ ケーシング下部の径小部が先端ほど径小のテ
ーパ状に形成されてなる特許請求の範囲第３項記
載のケースオーガー。 ５ ケーシング下部の径小部がテーパのついてい
ない円筒状をなす特許請求の範囲第３項記載のケ
ースオーガー。 ６ 多数の撹乱刃が、スクリユー羽根の螺条方向
と同方向に所要間隔毎の列状をなすように配列し
て付設されてなる特許請求の範囲第３項、第４項
または第５項のいずれか１項に記載のケースオー
ガー。[Claims] 1. The diameter of the lower part of the casing is reduced, and a screw blade having approximately the same outer diameter as the upper part of the casing is fixed to the outer periphery of the reduced diameter part, and the rotational diameter of the tip of the screw blade is set between the rows of the screw blade. Using a case auger with a large number of disturbance blades of approximately the same diameter arranged at required intervals, the case auger is used to rotatably drill a hole in the target ground, and from the bottom of the casing to the hole in the top of the casing, which has a larger diameter. After entering the hole, the excavated soil pushed up by the screw blades is pressed against the ground around the hole by the circumferential surface of the upper part of the casing, and after reaching a predetermined depth, the cement milk injected from the tip of the case auger and the rows of the screw blades are poured into the hole. The case auger is pulled up while stirring and kneading some of the excavated earth and sand remaining in the excavated soil by the rotation of the case auger, and then the prefabricated piles are press-fitted into the soil mortar created in the borehole while it is still unhardened. Foundation pile construction method. 2. The foundation pile construction method according to claim 1, wherein the case auger is rotated in reverse during stirring and kneading. 3 The upper part of the casing is formed to have approximately the same diameter as the borehole diameter, and the lower part is formed to have a smaller diameter than that, and a screw blade having approximately the same outer diameter as the upper part of the casing is fixed to the outer periphery of the body of the small diameter part, and this A case auger characterized in that a large number of disturbance blades each having a tip rotating diameter approximately the same diameter as the screw blade are attached at required intervals between the rows of the screw blade. 4. The case auger according to claim 3, wherein the small-diameter portion of the lower portion of the casing is formed into a tapered shape that becomes smaller in diameter toward the tip. 5. The case auger according to claim 3, wherein the small diameter portion at the bottom of the casing has a cylindrical shape without a taper. 6. Claims 3, 4, or 5, in which a large number of disturbance blades are arranged in rows at required intervals in the same direction as the thread direction of the screw blade. The case auger described in any one of the items.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4483380A JPS56142923A (en) | 1980-04-04 | 1980-04-04 | Construction of foundation pile and case auger used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4483380A JPS56142923A (en) | 1980-04-04 | 1980-04-04 | Construction of foundation pile and case auger used therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56142923A JPS56142923A (en) | 1981-11-07 |
| JPS6342046B2 true JPS6342046B2 (en) | 1988-08-19 |
Family
ID=12702460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4483380A Granted JPS56142923A (en) | 1980-04-04 | 1980-04-04 | Construction of foundation pile and case auger used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56142923A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5941520A (en) * | 1982-08-30 | 1984-03-07 | Toyo Pairu Fume Kan Seisakusho:Kk | Construction of foundation pile and excavator therefor |
| JPS60148918A (en) * | 1984-01-17 | 1985-08-06 | Nittoku Kensetsu Kk | Method of building synthesized pile |
| JPS6110625A (en) * | 1984-06-26 | 1986-01-18 | Daido Concrete Kogyo Kk | Process of settling concrete pile |
| JPS61134426A (en) * | 1984-12-05 | 1986-06-21 | Chiyoda Kenki Kk | Method of burying pile |
| US7883295B2 (en) * | 2008-04-10 | 2011-02-08 | Schellhorn Verne L | Method and apparatus for forming an in situ subterranean soil cement structure having a cyclonic mixing region |
| WO2011089666A1 (en) * | 2010-01-25 | 2011-07-28 | 株式会社テノックス | Method for building column replaced with hydraulic solidifying liquid material and device for constructing column replaced with hydraulic solidifying liquid material |
| JP5597232B2 (en) * | 2012-08-30 | 2014-10-01 | 株式会社トラバース | Ground improvement device and residual soil discharge suppression body of ground improvement device |
| JP2015140610A (en) * | 2014-01-30 | 2015-08-03 | 株式会社日本住宅保証検査機構 | Construction apparatus for hydraulic solidification material liquid-substituted column, construction method for hydraulic solidification material liquid-substituted column, and hydraulic solidification material liquid-substituted column |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5299611A (en) * | 1976-02-17 | 1977-08-20 | Seiko Kogyo Kk | Method of forming column body in subsoil |
| JPS53105808A (en) * | 1977-02-26 | 1978-09-14 | Teruo Koi | Device for placing base pile |
| JPS543315A (en) * | 1977-06-10 | 1979-01-11 | Takechi Komusho Kk | Method of construction of pile that horizontal force is strengthened and its device |
-
1980
- 1980-04-04 JP JP4483380A patent/JPS56142923A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5299611A (en) * | 1976-02-17 | 1977-08-20 | Seiko Kogyo Kk | Method of forming column body in subsoil |
| JPS53105808A (en) * | 1977-02-26 | 1978-09-14 | Teruo Koi | Device for placing base pile |
| JPS543315A (en) * | 1977-06-10 | 1979-01-11 | Takechi Komusho Kk | Method of construction of pile that horizontal force is strengthened and its device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56142923A (en) | 1981-11-07 |
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