JP3267441B2 - Base structure of waterproof sheet and method of construction of base structure - Google Patents
Base structure of waterproof sheet and method of construction of base structureInfo
- Publication number
- JP3267441B2 JP3267441B2 JP11733194A JP11733194A JP3267441B2 JP 3267441 B2 JP3267441 B2 JP 3267441B2 JP 11733194 A JP11733194 A JP 11733194A JP 11733194 A JP11733194 A JP 11733194A JP 3267441 B2 JP3267441 B2 JP 3267441B2
- Authority
- JP
- Japan
- Prior art keywords
- waterproof sheet
- water
- sheet
- underlayer
- layer
- 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 - Fee Related
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、防水シートの欠陥部よ
り漏れる液体の土壌地盤または成形地盤面えの漏れ区域
面の拡大防止構造に係わるもので、特に傾斜部の多い廃
棄物最終処分場の防水工に対して、施工の安定性と長期
防水効果の信頼性を与えることが出来る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing a liquid leaking from a defective portion of a waterproof sheet from expanding a leakage area of a soil ground or a formed ground surface, and more particularly to a final disposal site for waste having many inclined portions. For the waterproofing work, the stability of construction and the reliability of the long-term waterproofing effect can be given.
【０００２】[0002]
【従来の技術】従来の土木に於けるしゃ水工としては、
転圧した下地地盤の上に、直接防水シートを付設した構
造が使用されて来た。この場合は、下地地盤と防水シー
トの境界層の隙間より漏れの範囲が拡大し、漏れ量が時
間とともに増加する欠点を解決出来なかつた。2. Description of the Related Art As a conventional civil engineering damper,
A structure has been used in which a waterproof sheet is directly provided on a rolled ground. In this case, the problem that the range of leakage is increased from the gap between the ground layer and the boundary layer between the waterproof sheet and the amount of leakage increases with time cannot be solved.
【０００３】この境界層の漏れ拡大を防ぐために、高弾
性高分子シートの表面に水膨張性ベントナイト層を複合
した構造のシートを使用した構造の防水シートが使用さ
れはじめている。この防水シートは、性能、生産、重量
増加の問題があり、特に、性能保持の関係により、ベン
トナイトは約４〜５ｍｍ厚さ迄しか積層できないので、
防水シートの下地が土壌の場合は下地の凹凸対応に対
し、ベントナイトの機能が不足する。しかも、低弾性係
数のシートにはベントナイトは生産上積層できない欠点
を有しているので、下地との馴染み問題は解決できな
い。In order to prevent the leakage of the boundary layer from spreading, a waterproof sheet having a structure in which a water-expandable bentonite layer is combined on the surface of a highly elastic polymer sheet has begun to be used. This waterproof sheet has problems of performance, production, and weight increase. In particular, because of the relationship of performance retention, bentonite can be laminated only to a thickness of about 4 to 5 mm.
If the ground of the waterproof sheet is made of soil, the function of bentonite is insufficient to cope with the unevenness of the ground. In addition, a sheet having a low elastic modulus has a disadvantage that bentonite cannot be laminated in production, so that the problem of familiarity with a base cannot be solved.
【０００４】転圧した下地地盤の上に防水シートを付設
し、しかる後に、粉状水膨張性ベントナイト層を防水シ
ートの内側に設けた構造についても検討されたが、高水
圧になると流失して、漏れ防止効果不安定であつた。[0004] A structure in which a waterproof sheet is provided on the rolled ground, and then a powdery water-expandable bentonite layer is provided inside the waterproof sheet has been studied. The effect of preventing leakage was unstable.
【０００５】転圧した下地地盤または成形地盤の上に水
反応形吸水性樹脂のシートを付設し、その上に防水シー
トを設けた構造が検討された。しかし、防水シートから
の連続した液体の漏れに対し、吸水の限度以上になれ
ば、それ以上は効果がなくなる恐れがあり、長期の漏れ
防止の信頼性の問題を残す可能性がある。A structure in which a sheet of a water-reactive water-absorbent resin is provided on a compacted ground or formed ground, and a waterproof sheet is provided thereon has been studied. However, if the liquid leaks continuously from the waterproof sheet, if it exceeds the water absorption limit, there is a possibility that the effect cannot be further increased, and there is a possibility that a long-term reliability problem of leak prevention may remain.
【０００６】防水シートの下地地盤または成形地盤に、
水膨張性粒状ベントナイト層を設けた、構造が考えら
れ、シート漏れ部の自己修復性と漏れ拡大防止効果は確
認された。しかし、傾斜部の施工に不安定性を残し、さ
らに安定した構造が望まれた。[0006] On the ground or formed ground of the waterproof sheet,
A structure having a water-swellable granular bentonite layer was considered, and the self-healing property of the sheet leaking portion and the effect of preventing the spread of the leak were confirmed. However, a more stable structure was desired, leaving instability in the construction of the slope.
【０００７】防水シートの下地地盤または成形地盤に、
水膨張性粒状ベントナイト層を設けるにあたり、該ベン
トナイトを一定の厚さに容易に施工出来、さらに防水シ
ートの漏れ部に構成される遮水壁の強度の向上と、自己
修復性の向上を期待出来る構造のしゃ水工の施工と、さ
らに、傾斜部に於ける施工の安定性と、長期信頼性を確
保する事である。[0007] On the ground or formed ground of the waterproof sheet,
In providing the water-expandable granular bentonite layer, the bentonite can be easily applied to a certain thickness, and furthermore, it is expected that the strength of the impermeable wall formed at the leak portion of the waterproof sheet and the self-healing property can be improved. The purpose of this method is to secure the stability of construction and the long-term reliability of the construction on slopes and the construction of construction works.
【課題を解決するための手段】従来の防水シートと複合
される下地の境界層に生じる問題点に着目し研究した結
果、防水シートと複合される下地の構造を、水膨張性粒
状ベントナイトを充填固定出来る、多間隙を有するシー
ト状に作られた材料または、該材料の下側に不織布また
は防水シートを複合した材料を下地層として付設し、該
ベントナイトを充填してなる防水シートの下地構造を設
けることにより、地下水、雨水等の流れに対し防水シー
トからの漏れ量を最小限に安定して押さえることが出
来、特に傾斜部の不安定な下地地盤に対しても、防水シ
ートの欠陥部より漏れる液体を利用して、強固な局部し
ゃ水壁を自動的に形成出来る事を見いだし本発明を完成
した。多間隙を有するシート状に作られた材料の片側に
複合された不織布または、防水シートは、柔軟性に富
み、輸送、施工性の向上を解決した。As a result of studying the problems that occur in the boundary layer of the underlayer combined with the conventional waterproof sheet, the structure of the underlayer combined with the waterproof sheet is filled with water-expandable granular bentonite. The underlayer structure of a waterproof sheet formed by fixing a material formed into a sheet having multiple gaps or a material obtained by combining a nonwoven fabric or a waterproof sheet under the material as an underlayer and filling the bentonite is provided. By providing, it is possible to minimize the amount of leakage from the waterproof sheet against the flow of groundwater, rainwater, etc., and minimize the amount of leakage from the waterproof sheet, especially on the ground with unstable slopes. The present inventors have found that a strong local barrier wall can be automatically formed by utilizing the leaking liquid, and completed the present invention. A nonwoven fabric or a waterproof sheet composited on one side of a sheet-shaped material having multiple gaps is rich in flexibility and solves the improvement of transportability and workability.
【０００８】[0008]
【作用】本発明の構造と施工法の一例について説明する
と、防水シートの下地地盤に水膨張性粒状ベントナイト
施工するに当り、該ベントナイトを充填固定出来る多間
隙、望ましくは多空隙率５０％以上を有するシート状に
作られた材料を付設し、しかる後に、該ベントナイトを
細密充填する。該付設シートの厚さと弾性により、該ベ
ントナイトが、均一の厚さに容易に充填される。ベント
ナイトが粒状であるので充填は容易で、施工は安定され
る。An example of the structure and construction method of the present invention will be described below. When water-expandable granular bentonite is constructed on the ground of a waterproof sheet, the bentonite can be filled and fixed with a large number of gaps, preferably a porosity of 50% or more. A sheet-shaped material having the bentonite is then finely packed. The bentonite is easily filled to a uniform thickness due to the thickness and elasticity of the attached sheet. Since the bentonite is granular, the filling is easy and the construction is stable.
【０００９】防水シートのからの漏れに対しベントナイ
トは粒状になつているので、粒子間の間隙を通過した水
により、粒状ベントナイトの表面は瞬間的に５〜１０倍
膨張し、透水係数１０−７ｃｍ／ｓ以上の不透水性しゃ
水壁を漏れ部の状態に合わせた厚さで自動的に作り得
る。この生成糊材が、防水シートと下地材の馴染み不均
一部（水の漏れ拡大間隙）、漏れ局部の破損部を充填閉
止する作用を果たす。[0009] Since the bentonite is granular in response to leakage from the waterproof sheet, the surface of the granular bentonite instantaneously expands 5 to 10 times by water passing through the gap between the particles, and has a water permeability of 10 -7. An impermeable barrier wall of not less than cm / s can be automatically formed with a thickness adapted to the state of the leaking part. The generated glue material fills and closes the non-uniform portion of the waterproof sheet and the base material (the gap where water leaks is enlarged) and the damaged portion of the leak local portion.
【００１０】このため、防水シートよりの漏れ液体は、
粒状ベントナイトの水による表面膨張によつて生成され
るしゃ水糊、未膨張部の骨材作用と、該ベントナイトを
固定する弾性のある多空隙を有する下地材構造シートの
作用により、急傾斜面にも耐えられる安定した、しゃ水
壁の形成と漏れ部の自己修復を可能にした。For this reason, the liquid leaking from the waterproof sheet is
Due to the water repellent generated by the surface expansion of the granular bentonite with water and the aggregate action of the unexpanded portion, and the action of the base material structure sheet having elastic multi-cavities for fixing the bentonite, the steep slope surface is formed. Stable, durable wall formation and self-healing of leaks are possible.
【００１１】[0011]
【実施例】以下、本発明を図示実施例に従つて詳述する
が、これによつて本発明が限定されるものされるもので
はない。 実施例 図１は本発明の基本下地構造断面図である。この構造
は、水膨張性粒状ベントナイト（１）、弾性を有する単
繊維をからめあわせて作られたシート状の層である
（２）、その底面に複合された不織布（３）、そして転
圧土壌地盤（４）により構成されている。特に（１）の
水膨張性粒状ベントナイトと、（２）の弾性を有する単
繊維をからめあわせて作られたシート状の層は本発明の
構成に欠く事の出来ない要素である。（１）の破砕粒度
の分布は０、５〜５ｍｍ程度のものが好ましい。（２）
は空隙率９０％程度のものが好ましい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to illustrated embodiments, but the present invention is not limited thereto. Embodiment FIG. 1 is a sectional view of a basic underlayer structure according to the present invention. This structure is a water-expandable granular bentonite (1), a sheet-like layer made by entanglement of elastic single fibers (2), a nonwoven fabric composited on its bottom surface (3), and compacted soil It is constituted by the ground (4). In particular, the sheet-like layer formed by entanglement of the water-swellable granular bentonite of (1) and the elastic single fiber of (2) is an essential element of the constitution of the present invention. The distribution of the crushed particle size in (1) is preferably about 0 to 5 to 5 mm. (2)
Preferably has a porosity of about 90%.
【００１２】図２は本発明の防水工の施工状態断面図を
示す。（２）、（３）により構成されるシート状の多空
隙を有する層を下地地盤層（４）に付設し、その後、
（１）の水膨張性粒状ベントナイトを（２）の空隙に充
填し、その上に、防水シート（５）を付設した状態を示
す。（２）の弾性を有する単繊維の効果により、施工に
於て（１）のベントナイトは均一の厚さを容易に構成出
来る。（２）の厚さは２０〜３０ｍｍが好ましい。特
に、急傾斜面に於ける施工には（１）の水膨張性粒状ベ
ントナイトのしゃ水壁構成の安定した性能保持に効果を
発揮する。FIG. 2 is a sectional view showing the construction of the waterproofing work according to the present invention. A sheet-like layer having multiple voids constituted by (2) and (3) is attached to the foundation ground layer (4), and thereafter,
A state in which the water-swellable granular bentonite of (1) is filled in the void of (2) and a waterproof sheet (5) is provided thereon. Due to the effect of the single fiber having elasticity of (2), the bentonite of (1) can easily be formed to have a uniform thickness in construction. The thickness of (2) is preferably 20 to 30 mm. In particular, in the construction on a steeply inclined surface, the effect of maintaining the stable performance of the water blocking wall structure of the water-expandable granular bentonite of (1) is exhibited.
【００１３】図３は図２の本発明構造断面のしゃ水工
の、しゃ水作用の状態断面図を示す。防水シート（５）
破損漏れが生じ、（６）に示すように水が（１）、
（２）により構成された層に浸入した場合、漏水（６）
は先ず（１）の粒状ベントナイト層の間隙を瞬時に通過
して一定の範囲に広がる。この時漏水は（１）の層の間
隙を通過しながら粒状ベントナイトの未膨張核部を残し
表面のみを膨張させ、次第に漏水の通過を抑制し、最後
に強固なしゃ水境界（９）と漏水部の自動閉鎖充填
（７）を形成し、漏れ面積を局所に抑え、漏れを自動閉
止する。この場合（２）の弾性を有する単繊維層の効果
により、問題を残していた傾斜部の施工の安定性と性能
の信頼性を向上させる事ができる。FIG. 3 is a sectional view showing a state of a water-repelling operation of the water-removing work having the structural cross-section of the present invention shown in FIG. Waterproof sheet (5)
Leakage of breakage occurs, and as shown in (6), water (1)
Water leaks when entering the layer constituted by (2) (6)
First, it instantaneously passes through the gap of the granular bentonite layer of (1) and spreads in a certain range. At this time, the water leaks while passing through the gap between the layers of (1), leaving only the unexpanded nucleus of the granular bentonite and expanding only the surface, gradually suppressing the passage of the water leak, and finally, the solid water-tight boundary (9) and the water leak. A self-closing filling (7) of the part is formed to locally limit the leak area and to automatically close the leak. In this case, due to the effect of the single fiber layer having elasticity of (2), it is possible to improve the stability of the construction of the inclined portion and the reliability of the performance, which have left a problem.
【００１４】図３の作用をモデル的に確認する為の試験
装置を作り、（２）の厚さ２５ｍｍ層に、（１）の粒状
ベントナイトを充填し、防水シート（５）に１０ｍｍ直
径の穴を開け、水圧を０〜１ｋｇｆ／ｃｍ２迄上昇さ
せ、しゃ水効果を経時的に確認した結果、効果は（２）
の無い場合に比べ、水平方向のしゃ水壁境界の構成範囲
は性能安定性に於て１／２以下の優れた効果を確認出来
た。A test device for confirming the operation of FIG. 3 as a model is prepared. A 25 mm thick layer of (2) is filled with granular bentonite of (1), and a 10 mm diameter hole is formed in a waterproof sheet (5). Was opened, the water pressure was raised to 0 to 1 kgf / cm 2 , and as a result of confirming the water-repelling effect over time, the effect was (2).
Compared to the case without the above, the composition range of the horizontal barrier wall was confirmed to have an excellent effect of less than 1/2 in performance stability.
【００１５】[0015]
【発明の効果】本発明は、上記のような構成である為、
以下のような優れた効果を奏するものである。 （ａ）大型の貯水池、廃棄物処理場等の防水シートから
の地盤えの漏水を最小に抑える信頼性のある施工が可能
になる。 （ｂ）従来、信頼性のある施工が困難であつた傾斜部の
施工の安定性が得られ、（１）の粒状ベントナイトによ
るしゃ水壁の構成が安定し、漏水面積の拡大防止に大き
な効果をもたらす。Since the present invention has the above-described structure,
It has the following excellent effects. (A) Reliable construction that minimizes leakage of ground from waterproof sheets in large reservoirs, waste disposal sites, and the like becomes possible. (B) The stability of the construction of the inclined part, which was difficult to construct with reliability in the past, can be obtained, and the structure of the water blocking wall made of the granular bentonite of (1) is stable, and the effect of preventing the expansion of the water leakage area is great. Bring.
【図１】本発明の防水シートの下地構造の基本断面図FIG. 1 is a basic sectional view of a foundation structure of a waterproof sheet according to the present invention.
【図２】本発明を使用した防水工の断面図FIG. 2 is a sectional view of a waterproofer using the present invention.
【図３】本発明の防水シート下地層を使用したしゃ水工
のしゃ水壁、漏れ部の自動修復作用の状態断面図FIG. 3 is a cross-sectional view showing a state of a water blocking wall and an automatic repairing operation of a leaking part of a water works using a waterproof sheet base layer of the present invention.
１ 水膨張性粒状ベントナイト ２ 弾性を有する単繊維を絡み合わせて作られたシー
ト状材料 ３ ２の材料の地盤側に複台された不織布または防水
シート ４ 防水する地盤層 ５ 防水シート ６ 防水シートの漏れ部より浸入する液体 ７ 防水シートの漏れ部を自己修復する水膨張をした
ベントナイトのしゃ水糊 ８ 粒状ベントナイトの未膨張核でしゃ水壁の骨材部 ９ 水膨張性粒状ベントナイトが漏れ水により構成す
るしゃ水壁の境界DESCRIPTION OF REFERENCE NUMERALS 1 Water-expandable granular bentonite 2 Sheet-like material made by entanglement of elastic single fibers 3 Nonwoven fabric or waterproof sheet double-mounted on the ground side of 2 material 4 Ground layer for waterproofing 5 Waterproof sheet 6 Waterproof sheet Liquid that penetrates from the leaking part 7 Water-expanded glue of bentonite that has self-repairing the leaking part of the waterproof sheet 8 Non-expanded core of granular bentonite and aggregate part of water-blocking wall 9 Water-expandable granular bentonite is leaked by water The boundary of the shading wall that composes
───────────────────────────────────────────────────── フロントページの続き (73)特許権者 000005278 株式会社ブリヂストン 東京都中央区京橋１丁目10番１号 (73)特許権者 000104814 クニミネ工業株式会社 東京都千代田区岩本町１丁目10番５号 (73)特許権者 592141721 住友ゴム特品販売株式会社 東京都中央区日本橋馬喰町２丁目３番３ 号 ファッションフェースビル６Ｆ (72)発明者 小林 辰夫 藤沢市鵠沼松が岡２−５−14 (56)参考文献 特開 平２−176012（ＪＰ，Ａ) 特開 平５−1408（ＪＰ，Ａ) 特開 平３−76915（ＪＰ，Ａ) 特開 平１−99836（ＪＰ，Ａ) 特開 平４−247113（ＪＰ，Ａ) 実開 平３−99028（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B09B 1/00 E02B 3/18 B32B 1/00 - 35/00 ──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000005278 Bridgestone Corporation 1-10-1 Kyobashi, Chuo-ku, Tokyo (73) Patent holder 000104814 Kunimine Industry Co., Ltd. 1-10-5 Iwamotocho, Chiyoda-ku, Tokyo (73) Patent holder 592141721 Sumitomo Rubber Specialty Products Co., Ltd. 2-3-3 Nihombashi Bakurocho, Chuo-ku, Tokyo Fashion Face Building 6F (72) Inventor Tatsuo Kobayashi 2-5-14 Kugenuma Matsugaoka, Fujisawa City (56) Reference Document JP-A-2-176012 (JP, A) JP-A-5-1408 (JP, A) JP-A-3-76915 (JP, A) JP-A-1-99836 (JP, A) JP-A-4- 247113 (JP, A) Japanese Utility Model Hei 3-99028 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B09B 1/00 E02B 3/18 B32B 1/00-35/00
Claims (8)
多間隙を有するシート状に作られた材料を、防水シート
の下地層として、下地地盤層上に付設し、該粒状ベンナ
イトを該多間隙内に充填してなる防水シートの下地構
造。The method according to claim 1] material made into a sheet having a multi-gap water swellable particulate bentonite can be filled fixed, as an underlying layer of the waterproof sheet, and attached to the underlying ground layer, the granular Ben'na <br/> site the underlying structure of the waterproof sheet obtained by filling in the multi-gap.
た材料を、防水シートの下地層として下地地盤層上に付
設し、該下地層の多間隙に水膨張性粒状ベンナイトを充
填してなる防水シートの下地構造。2. A single material made into a sheet combined entwined fibers, <br/> and set with the base ground layer as an underlying layer of the waterproof sheet, the water-swellable particulate multi gap underlayer Underlayer structure of waterproof sheet filled with Bennite.
た材料の下側に不織布または防水シートを設けた複合構
造の材料を、下地層として、下地地盤層上に付設し、該
下地層の多間隙に水膨張性粒状ベンナイトを充填してな
る防水シートの下地構造。3. A material having a composite structure in which a nonwoven fabric or a waterproof sheet is provided below a material formed in a sheet shape by entanglement of single fibers is provided as an underlayer on the underground ground layer. Underlayer structure of a waterproof sheet in which water-swelling granular benite is filled in the multi-pores.
粒度が０．５〜５ｍｍ程度のものを使用し、前記下地層
の多間隙は、空隙率５０％以上としたことを特徴とする
請求項１、２又は３に記載の下地構造。 4. The crushed water-swellable granular benite is crushed.
The undercoat layer having a particle size of about 0.5 to 5 mm is used.
Is characterized by having a porosity of 50% or more.
The underlayer structure according to claim 1, 2 or 3.
多間隙を有するシート状に作られた材料を、防水シート
の下地層として、下地地盤層上に付設し、その後、粒状
ベンナイトを多間隙内に充填し、その上に防水シートを
付設する防水シートの下地構造の施工方法。 5. A water-swellable granular benite can be filled and fixed.
The material made into a sheet with multiple gaps is
As an underlayer on the underground layer, and then
Fill the gap with Bennite and put a waterproof sheet on it
Construction method of the base structure of the attached waterproof sheet.
た材料を、防水シートの下地層として下地地盤層上に付
設し、その後、下地層の多間隙に水膨張性粒状ベンナイ
トを充填し、その上に防水シートを付設する防水シート
の下地構造の施工方法。 6. A sheet formed by entanglement of single fibers.
Material is applied on the ground layer as a base layer for the waterproof sheet.
After that, water-expandable granular benzene
Tarpaulin that fills with a waterproof sheet and attaches a tarpaulin on it
Construction method of the underlying structure.
た材料の下側に不織布または防水シートを設けた複合構
造の材料を、下地層として、下地地盤層上に付設し、そ
の後 、該下地層の多間隙に水膨張性粒状ベンナイトを充
填し、その上に防水シートを付設する防水シートの下地
構造の施工方法。 7. A sheet formed by entanglement of single fibers.
Composite structure with a nonwoven fabric or waterproof sheet provided underneath the material
A structural material is provided as an underlayer on the underground layer, and
After that, water-expandable granular benite is filled in the multi-pores of the underlayer.
Of a tarpaulin that is filled with a tarpaulin
Construction method of the structure.
粒度が０．５〜５ｍｍ程度のものを使用し、前記下地層
の多間隙は、空隙率５０％以上としたことを特徴とする
請求項５、６又は７に記載の下地構造の施工方法。 8. The water-swellable granular benite is crushed.
The undercoat layer having a particle size of about 0.5 to 5 mm is used.
Is characterized by having a porosity of 50% or more.
A method for constructing an underlayer structure according to claim 5, 6, or 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11733194A JP3267441B2 (en) | 1994-04-20 | 1994-04-20 | Base structure of waterproof sheet and method of construction of base structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11733194A JP3267441B2 (en) | 1994-04-20 | 1994-04-20 | Base structure of waterproof sheet and method of construction of base structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07284746A JPH07284746A (en) | 1995-10-31 |
| JP3267441B2 true JP3267441B2 (en) | 2002-03-18 |
Family
ID=14709093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11733194A Expired - Fee Related JP3267441B2 (en) | 1994-04-20 | 1994-04-20 | Base structure of waterproof sheet and method of construction of base structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3267441B2 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2552307B2 (en) * | 1987-10-14 | 1996-11-13 | 旭化成工業株式会社 | Water blocking mat |
| US4997695A (en) * | 1988-11-21 | 1991-03-05 | James Clem Corporation | Clay mixture having contamination resistance |
| JP2700680B2 (en) * | 1988-12-28 | 1998-01-21 | 大成建設株式会社 | Impermeable structure |
| JP2512988Y2 (en) * | 1990-01-31 | 1996-10-02 | 豊順鉱業株式会社 | A waterproof sheet that prevents the water-swelling clay from falling off in the dry state and allows passage in the gelled state |
| US5237945A (en) * | 1990-12-17 | 1993-08-24 | American Colloid Company | Water barrier formed from a clay-fiber mat |
| JPH051408A (en) * | 1991-06-21 | 1993-01-08 | Daiwabo Create Kk | Water stopping material and water stopping method |
-
1994
- 1994-04-20 JP JP11733194A patent/JP3267441B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07284746A (en) | 1995-10-31 |
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