JPS61230098A - Water-stopping molded body - Google Patents
Water-stopping molded bodyInfo
- Publication number
- JPS61230098A JPS61230098A JP60071636A JP7163685A JPS61230098A JP S61230098 A JPS61230098 A JP S61230098A JP 60071636 A JP60071636 A JP 60071636A JP 7163685 A JP7163685 A JP 7163685A JP S61230098 A JPS61230098 A JP S61230098A
- Authority
- JP
- Japan
- Prior art keywords
- water
- stopping
- molded body
- wall
- bentonite
- 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.)
- Pending
Links
- 229910000278 bentonite Inorganic materials 0.000 claims description 8
- 239000000440 bentonite Substances 0.000 claims description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000002901 radioactive waste Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009375 geological disposal Methods 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
この発明は止水用成形体およびこの成形体を用いた止水
壁に関する。より詳細には高い止水性能の止水壁、例え
ば放射性廃棄物の地下貯蔵プラント等の施設への地下水
の流出入を防止する止水壁および止水用成形体に関する
。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a water-stopping molded body and a water-stopping wall using this molded body. More specifically, the present invention relates to a water-stopping wall with high water-stopping performance, for example, a water-stopping wall that prevents groundwater from flowing into or out of a facility such as an underground storage plant for radioactive waste, and a water-stopping molded body.
従来技術
放射性廃棄物を地下に封じ込める地層処分に先だって、
廃棄物の温度を冷すために、約３０年から５０年位の間
にわたって、地下４０ｍ〜５０＋ｎの深さのところに貯
蔵しておく必要がある。この場合、核種による地下水の
汚染を防ぐため、この一時貯蔵施設のまわりに止水壁を
築造することが必要である。このような目的の地中壁と
しては、従来鉄筋コンクリート製の連続壁が利用されて
いる。しかしこのような連続壁には次のような問題点が
あった。Conventional technology Prior to geological disposal, which confines radioactive waste underground,
In order to cool down the temperature of the waste, it is necessary to store it at a depth of 40m to 50+n underground for about 30 to 50 years. In this case, it is necessary to construct a water-stop wall around this temporary storage facility to prevent groundwater contamination by nuclides. Conventionally, continuous walls made of reinforced concrete have been used as underground walls for this purpose. However, such continuous walls have the following problems.
■ 透水係数が最小のものでも１０−６〜１Ｑ−’５／
＄、であり、上記のような目的の止水壁は１０−８〜１
０−””／ｅとする必要がある。■ Even the one with the lowest hydraulic conductivity is 10-6 to 1Q-'5/
$, and the water stop wall for the above purpose is 10-8 to 1
It is necessary to set it to 0-""/e.
■ 利用可能な最長耐用期間はせいぜい５０年程度であ
り、上記のような目的の止水壁では健全な状態での耐用
期間は安全率を含めて短くても１００年間必要となる。■ The maximum service life that can be used is about 50 years at most, and a water cut-off wall for the purpose mentioned above requires a service life of at least 100 years in a healthy state, including the safety factor.
発明の目的
この発明は上記事情に鑑みなされたものである。その目
的は透水係数が１０−７〜１０−”Ｃ１ｒＬ／ｆ、ｔＪ
）程度の高い止水性能を有し、１００年以上健全性を保
ち耐用できる止水壁およびこの止水壁に用いる止水用成
形体を提案するにある。OBJECT OF THE INVENTION This invention has been made in view of the above circumstances. The purpose is to have a hydraulic conductivity of 10-7 to 10-”C1rL/f, tJ
The purpose of the present invention is to propose a water-stopping wall that has a high level of water-stopping performance and can maintain soundness and durability for more than 100 years, and a water-stopping molded body for use in this water-stopping wall.
発明の構成
この発明の止水用成形体は、ベントナイトを加圧成形し
てなり、その嵩密度は少なくとも１．９０ ｆ７．５以
上であることを特徴とする。他の一つの発明である止水
壁はベントナイト加圧成形体を敷並べた止水壁であり、
該成形体は嵩密度が少なくとも１．９０ ｆ／、、ｓ以
上ぞあり、各成形体には緊結材によりプレストレスが導
入されていることを特徴とする。Structure of the Invention The water-stopping molded article of the present invention is formed by pressure-molding bentonite, and is characterized in that it has a bulk density of at least 1.90 f7.5. Another invention is a water-stopping wall in which bentonite press-molded bodies are lined up.
The molded bodies have a bulk density of at least 1.90 f/, s or more, and are characterized in that prestress is introduced into each molded body by a binding material.
作用
この止水用成形体および止水壁は、ベントナイトを密度
１．ｑｆ／、、ｓ以上に加圧成形した高密度の成形体が
、吸湿して膨潤することによって成形体間の隙間を完全
に充填閉塞するので、止水壁は高い止水性能、例えば透
水係数１Ｑ−’Ｖ秒以下の止水性能を発現する。また、
ｐｃ鋼線等の緊結材でプレストレスが導入しあるので、
成形体の垂直方向の膨潤が抑制され、水平方向にのみ膨
潤し形状、寸法の変化は水平方向のみであり、止水壁ｌ
こ高強度を付与することができる。Function This water-stopping molded body and water-stopping wall are made of bentonite with a density of 1. The high-density molded body press-formed to a pressure of qf/,,s or more absorbs moisture and swells, completely filling and closing the gaps between the molded bodies, so the water-stopping wall has high water-stopping performance, such as a water permeability coefficient. Demonstrates water stopping performance of 1Q-'V seconds or less. Also,
Since prestress is introduced with binding materials such as PC steel wire,
Swelling of the molded body in the vertical direction is suppressed, it swells only in the horizontal direction, and the shape and dimensions change only in the horizontal direction.
This can provide high strength.
この結果、止水壁は透水係数１（１””し７秒以下の止
水性能と１００年以上確実な健全性とを具備することが
できる。As a result, the water-stopping wall can have a permeability coefficient of 1 (1''), water-stopping performance of 7 seconds or less, and reliable soundness for more than 100 years.
なお、ベントナイトは核種を吸着するので、放射性物質
の施設周囲に用いその拡散を防止する上でも有効である
。Since bentonite adsorbs nuclides, it is also effective when used around facilities containing radioactive materials to prevent their diffusion.
実施例 以下実施例を挙げ図面を用い説明する。Example Examples will be described below with reference to the drawings.
第１図（ａ）、（ｔ））、（Ｑ）はこの止水用成形体の
製造工程を順に示す図面である。ベントナイト１を圧縮
成形機の成形型２に入れ（昧圧縮応力５００ Ｋｆ／’
ａｎ２をかけ、３０分以上この静的圧力を加え（ｂ丸そ
の後脱型して寸法が１００ｃＲＸ １００ｃａＸ ３０
ａｎ（この大きさは施工規模に応じて任意にかえること
ができる）の直方体形の止水用成形体３を得た。FIGS. 1(a), (t)), and (Q) are drawings sequentially showing the manufacturing process of this water-stopping molded body. Bentonite 1 was placed in mold 2 of a compression molding machine (with a compressive stress of 500 Kf/'
Apply an2 and apply this static pressure for over 30 minutes (b circle, then remove the mold and the dimensions are 100cRX 100caX 30
A rectangular parallelepiped water-stopping molded body 3 was obtained.
この成形体は嵩密度＊ １．９． ’／、’であった。This molded body has a bulk density* of 1.9. '/,'Met.
第２図（ａ）、（１））、（Ｃ）、（ｄ）は前記成形体
６を用いて上水壁を構築する工程を順に示す図面である
。止水壁を構築すべき地盤をピットおよびキャビテーシ
ョンジェットなどを併用してトレンチ４を掘削するこの
トレンチ４底にｐｃ鋼線５の下端を定着し上方に配向せ
しめて配置しくｂ）、このＰＣ鋼線５をガイドにしてト
レンチ４内に前記の止水用成形体６を積重ねて建込む（
ｃ）。トレンチ４内全体に成形体を建込んだ後、ＰＣ鋼
線５の上端に定着板６を取付け、ＰＣ鋼線５を緊張して
プレストレスを導入し複数の成形体を一体に緊結し。FIGS. 2(a), (1)), (C), and (d) are drawings sequentially showing the steps of constructing a water supply wall using the molded body 6. FIG. A trench 4 is excavated in the ground where the water cutoff wall is to be constructed using a pit and a cavitation jet. The lower end of the PC steel wire 5 is fixed to the bottom of this trench 4 and is oriented upward.b) The above-mentioned water-stop moldings 6 are stacked and built in the trench 4 using the wire 5 as a guide (
c). After erecting the molded bodies in the entire trench 4, a fixing plate 6 is attached to the upper end of the PC steel wire 5, and the prestress is introduced by tensioning the PC steel wire 5 to tie the plurality of molded bodies together.
成形体が密に敷並んでなった地中壁７を形成する（ｄ）
。Forming an underground wall 7 made up of densely lined compacts (d)
.
効果
この発明は以上の通りである。この上水用成形体を敷並
ベプレストレスを導入してなった止水壁は透水係数が１
０−７〜１０−１０ＣＩｌ＆／秒で止水性能が高く、か
つ１００年以上健全性を保ち耐用できる。従って例えば
第５図のごとき放射性廃棄物の一時貯蔵地下プラント８
の外壁に接した止水壁７−１．外壁からある程度距離が
ある止水壁７−２、あるいは底面を構成する止水壁７−
３等として用いて極めて有効である。Effects This invention is as described above. The water-stopping wall created by laying this water supply molded body and introducing pre-stress has a permeability coefficient of 1.
It has a high water-stopping performance of 0-7 to 10-10 CIl/sec, and can maintain its soundness and durability for more than 100 years. Therefore, for example, an underground temporary storage plant for radioactive waste 8 as shown in Figure 5.
Water-stop wall 7-1 in contact with the outer wall of. A water stop wall 7-2 that is a certain distance from the outer wall, or a water stop wall 7- that forms the bottom surface.
It is extremely effective when used as a third grade.
第１図（ａ）、ｆｂ）、（Ｃ）は上水用成形体を製造す
る工程を順に示す説明図、第２図（ａ）、ｆｂ）、（Ｃ
）ｔ（（１）は止水壁を構築する工程を順に示す縦断面
図、第３図は放射性廃棄物一時貯蔵地下プラントとその
周囲に構築した止水壁の縦断面図である。
１・・ベントナイト、２・・成形型、３・・上水用成形
体、４・・トレンチ、５・・ ＰＣ鋼線、６・・定着板
、７・・止水壁、８・・地下プラント。
（ａ）
第１図
（ｂ）
（ａ）
（Ｃ）
（ｂ）
（ｄ）FIGS. 1(a), fb), and (C) are explanatory diagrams sequentially showing the steps of manufacturing a molded body for clean water, and FIGS. 2(a), fb), and (C) are
)t((1) is a vertical cross-sectional view showing the steps of constructing a water-stop wall in order, and Figure 3 is a vertical cross-sectional view of the underground temporary storage plant for radioactive waste and the water-stop wall built around it.1.・Bentonite, 2. Molding mold, 3. Molded body for water supply, 4. Trench, 5. PC steel wire, 6. Fixing plate, 7. Water stop wall, 8. Underground plant. ( a) Figure 1 (b) (a) (C) (b) (d)
Claims (2)
、嵩密度が少なくとも１．９０ｇ／ｃｍ＾３以上である
ことを特徴とする止水用成形体。(1) A water-stopping molded product, which is a molded product obtained by pressure-molding bentonite and has a bulk density of at least 1.90 g/cm^3 or more.
てなつた止水壁であり、該成形体は嵩密度が少なくとも
１．９０ｇ／ｃｍ＾３以上であり、各成形体には緊結材
によりプレストレスが導入されていることを特徴とする
止水壁。(2) A water-stop wall formed by stacking a plurality of bentonite press-formed bodies, and the molded bodies have a bulk density of at least 1.90 g/cm^3 or more, and each molded body is provided with a binding material. A water-stop wall characterized by introducing prestress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60071636A JPS61230098A (en) | 1985-04-04 | 1985-04-04 | Water-stopping molded body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60071636A JPS61230098A (en) | 1985-04-04 | 1985-04-04 | Water-stopping molded body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61230098A true JPS61230098A (en) | 1986-10-14 |
Family
ID=13466330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60071636A Pending JPS61230098A (en) | 1985-04-04 | 1985-04-04 | Water-stopping molded body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61230098A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198250U (en) * | 1987-12-18 | 1989-06-30 |
-
1985
- 1985-04-04 JP JP60071636A patent/JPS61230098A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198250U (en) * | 1987-12-18 | 1989-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101537090B1 (en) | Method for waste burial and container for waste storage | |
| US4050659A (en) | Transformer pad | |
| CN110453729B (en) | Steel mould partition plate assembly for flexible particle waterproof protective layer construction and construction method | |
| JPS61230098A (en) | Water-stopping molded body | |
| US5125532A (en) | System for the permanent storage of radioactive wastes | |
| JP3539928B2 (en) | Buried facility and its construction method, molded body used for it | |
| CN106499416B (en) | Low and intermediate level radioac grotto type disposal site waterproof and water drainage system and construction method | |
| JPH0475966B2 (en) | ||
| JP6815672B1 (en) | How to contain radiation from concrete placement | |
| JP2005207132A (en) | Caisson, and revetment for reclamation | |
| JP2006327092A (en) | Compression molding method for clay-based hardly water-permeable material | |
| JPS6221100A (en) | Underground disposal method for radioactive waste | |
| JP3177556B2 (en) | Molded buffer material for geological disposal of radioactive contaminants and its forming method | |
| CN112854248A (en) | Foundation pit backfill structure and construction method thereof | |
| CN205895272U (en) | Storehouse prevention of seepage drainage system is dealt with to low and intermediate level radioac tive waste grotto | |
| KR102414774B1 (en) | Method for obtaining layer strength of disposal container for radioactive waste near-surface disposal facility using assembly precast waffle slab | |
| KR102458248B1 (en) | Construction method of buffer material at field | |
| JP4538781B2 (en) | Rolling method for high density clay-based impermeable material | |
| JPH0632640Y2 (en) | Final disposal waste of radioactive waste | |
| JPS61201200A (en) | Equipment for treating stratum of radiation waste and execution method thereof | |
| JPH10221497A (en) | Container for geological disposal and molding method thereof | |
| JPH0634105B2 (en) | Method for manufacturing cushioning material for radioactive waste disposal | |
| JP2567722Y2 (en) | Curing materials for construction work | |
| JP2016217028A (en) | Method and structure for filling water-swellable clay | |
| RU2099488C1 (en) | Method of production of columns |