JP2000186316A - Impervious sheet - Google Patents
Impervious sheetInfo
- Publication number
- JP2000186316A JP2000186316A JP37586798A JP37586798A JP2000186316A JP 2000186316 A JP2000186316 A JP 2000186316A JP 37586798 A JP37586798 A JP 37586798A JP 37586798 A JP37586798 A JP 37586798A JP 2000186316 A JP2000186316 A JP 2000186316A
- Authority
- JP
- Japan
- Prior art keywords
- water
- sheet member
- storage material
- sheet
- swellable
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Landscapes
- Revetment (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、遮水シートに関
し、更に詳しくは、地下土壌、地表面、山留壁、池、産
業廃棄物の埋設地等に敷設し防水膜として機能する遮水
シートに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seepage control sheet, and more particularly, to a seepage control sheet which is laid on underground soil, the ground surface, a ridge wall, a pond, a burial site for industrial waste, and functions as a waterproofing membrane. It is about.
【０００２】[0002]
【従来の技術】従来から、土木現場では、溢水、漏水、
湧水等に対する水の処理が極めて重要である。特に、地
下土壌、地表面、山留壁等から漏出する水が表面に出て
きて、現場作業を困難にする。一方、池では濁水、産業
廃棄物の処理場では有毒物質を含む汚水の流出などの問
題がある。そのため、不透水性や撥水性を有する遮水シ
ートを山留壁等に直接又は間接的に敷設して、水の漏れ
を防止する手法が多く開発されている。しかし、不透水
性や撥水性を有する遮水シートは、一部にでも破断が生
じると、その部分から山留壁側の水が逃げ出して止まら
ない。しかも、水が逃げることにより、破断口が益々拡
大することになる。2. Description of the Related Art Conventionally, flooding, water leakage,
Water treatment for spring water is very important. In particular, water leaking from the underground soil, the ground surface, the retaining wall, etc. comes out to the surface, making on-site work difficult. On the other hand, there are problems such as turbid water in ponds and outflow of wastewater containing toxic substances in industrial waste treatment plants. For this reason, many techniques have been developed to prevent water leakage by directly or indirectly laying a water-impermeable sheet having water impermeability or water repellency on a retaining wall or the like. However, if the water-impervious sheet having water impermeability or water repellency is broken at any part, the water on the retaining wall side escapes from that part and does not stop. Moreover, as the water escapes, the rupture opening further increases.
【０００３】このようなことから、一定の水分を含むこ
とができ、土壌と密着し易い遮水シートが開発された。
例えば、特公平７−８１２８１号公報に記載されている
多層防水材がある。この多層遮水シートは、表裏一対の
柔軟性シート材層間に粉粒状の水膨潤性粘土を層状に介
装すると共にニードルパンチングによって一方のシート
材層と他方のシート材層を連結したものである。[0003] Under such circumstances, a water-blocking sheet that can contain a certain amount of moisture and easily adheres to soil has been developed.
For example, there is a multilayer waterproof material described in Japanese Patent Publication No. 7-81281. This multilayer waterproof sheet is obtained by interposing a granular water-swellable clay in layers between a pair of front and back flexible sheet materials and connecting one sheet material layer and the other sheet material layer by needle punching. .
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記構造の
多層遮水シートにおいては、水膨潤性粘土の層は細いニ
ードルパンチングによる結合により表裏シート材層間に
保持されているので、ニードルパンチングされた僅かの
部分以外は水膨潤性粘土層の全体が相互に繋がった状態
となっている。そのため、シートが切断されたり穴が空
いたりすると切断個所や穴空き個所から外に粘土が容易
に連続的に流れ出し散逸する問題があった。However, in the multilayer water impermeable sheet having the above structure, the water-swellable clay layer is held between the front and back sheet material layers by bonding by fine needle punching. Except for the part, the whole water-swellable clay layer is in a state of being connected to each other. For this reason, when the sheet is cut or a hole is formed, there is a problem that the clay easily and continuously flows out from the cut or perforated portion and dissipates.
【０００５】また上記の多層遮水シートにおいては、水
膨潤性粘土を介して２枚のシートをニードルングするた
め、ニードル自体の消耗が激しく、取替えロスが生じ生
産性も悪い。Further, in the above-mentioned multilayer water-impermeable sheet, since two sheets are needled through the water-swellable clay, the needles themselves are greatly consumed, replacement loss occurs, and productivity is poor.
【０００６】このようなことから、ニードルを使用しな
いで且つ、粘土が連続して流れ出すようなことのない遮
水マットが開発されている。例えば、２層の通水性シー
トの間に任意の高さの隔壁が設けられ、該隔壁内に高吸
水物質が充填されている遮水マット（特許登録公報第２
５５２３０７号）がそれである。[0006] Under such circumstances, a water-proof mat which does not use a needle and which does not allow clay to flow continuously has been developed. For example, a partition wall having an arbitrary height is provided between two water-permeable sheets, and the partition wall is filled with a highly water-absorbing substance (Patent Registration Publication No. 2).
No. 552307).
【０００７】この遮水マットは、ニードルを使用しない
ため、この遮水マット自体に不用意に穴が空いたり一部
破断した場合、隔壁内の高吸水物質が連続して外に流れ
出すようなことはない。また、その穴や破断部分では隔
壁内の高吸水物質が散逸してしまうが、周囲からの圧力
により隔壁がせり出してきて、その穴や破断部分を埋め
る作用が働く。[0007] Since this water-proof mat does not use needles, if the water-proof mat itself is inadvertently punctured or partially broken, the highly water-absorbing substance in the partition walls may continuously flow out. There is no. In addition, the high water-absorbing substance in the partition wall is dissipated in the hole or the broken portion, but the partition wall protrudes due to the pressure from the surroundings, and acts to fill the hole or the broken portion.
【０００８】しかし、穿孔した穴や破断部分に、他の隔
壁内の高吸水物質が容易に転移移動して、その部分を埋
めるという確実な修復作用がないのである。従って、こ
の遮水マットは、破断や穿孔事故に対して、水の逃げを
必ずしも確実に防止できない欠点がある。[0008] However, the highly water-absorbing substance in the other partition wall is easily transferred and moved to the perforated hole or the broken portion, and there is no reliable repairing action of filling the portion. Therefore, this water-blocking mat has a drawback that it is not always possible to reliably prevent the escape of water in the event of breakage or perforation.
【０００９】また、この遮水マットは、両面が通水性の
シートを使っているので、遮水マットを現場で施工する
場合、水が表面に付着し易く、更に付着した水が通水性
シートを介して隔壁内の高吸水物質に吸収されてしまう
結果、その一部が硬化して施工性が悪くなる欠陥があっ
た。本発明は、上述した技術的背景のもとでなされたも
のである。すなわち、本発明は、高吸水物質の散逸を防
止でき、破断や穿孔等の場合にもその部分を確実に埋め
ることができ、また、施工性にも優れた遮水シートを提
供することである。[0009] Further, since the water-blocking mat uses a water-permeable sheet on both sides, when the water-blocking mat is constructed on site, water easily adheres to the surface, and the water that adheres further forms the water-permeable sheet. As a result, the water is absorbed by the highly water-absorbing substance in the partition walls, and as a result, there is a defect that a part of the material is hardened and the workability is deteriorated. The present invention has been made under the above-mentioned technical background. That is, an object of the present invention is to provide a water-blocking sheet that can prevent dissipation of a highly water-absorbing substance, can surely fill the portion even in the case of breakage or perforation, and has excellent workability. .
【００１０】[0010]
【課題を解決するための手段】かくして、本発明者等
は、このような問題点に対して鋭意研究を行った結果、
水膨潤性保蓄材を充填保持するための多数の凹部におい
て、該凹部間相互に水膨潤性保蓄材を適度に通過させる
べく通孔性を付与することにより、シートが破断や穿孔
した場合に、その部分に他からの水膨潤性保蓄材が一部
移動する点を見出した。本発明は、この知見をもとに達
成されたものである。Means for Solving the Problems Thus, the present inventors have conducted intensive studies on such problems, and as a result,
In the case where the sheet is broken or perforated by providing a plurality of recesses for filling and holding the water-swellable storage material with perforation to allow the water-swellable storage material to pass between the recesses appropriately. Then, it was found that a part of the water-swellable storage material from other moved to that part. The present invention has been achieved based on this finding.
【００１１】即ち、本発明は、（１）、裏シート部材と
表シート部材と水を保蓄するために両者間に介在する水
保蓄材とよりなる遮水シートであって、裏シート部材が
水膨潤性保蓄材を充填保持するための多数の凹部を備
え、該凹部間は水保蓄材が適度に通過可能な通孔性を有
し、表シート部材が水保蓄材を充填保持した状態の凹部
を封鎖してなる遮水シートに存する。That is, the present invention relates to (1) a water-blocking sheet comprising a back sheet member, a front sheet member, and a water storage / storage material interposed therebetween for storing water. Is provided with a number of recesses for filling and holding the water-swellable storage material, and between the recesses has a perforation that allows the water storage material to appropriately pass, and the front sheet member fills the water storage material. The water-impervious sheet is formed by closing the held concave portion.
【００１２】そして、（２）、裏シート部材と表シート
部材と水を保蓄するための両者間に介在する粒状の水保
蓄材とよりなる遮水シートであって、裏シート部材が柔
軟性且つ透水性を有し、水保蓄材を充填保持するための
多数の凹部を備え、該凹部間は水膨潤性保蓄材が適度に
通過可能な通穴性を有し、表シート部材が柔軟性且つ不
透水性を有して水膨潤性保蓄材を充填保持した状態の凹
部を封鎖してなる遮水シートに存する。(2) A water-impervious sheet comprising a back sheet member, a front sheet member, and a granular water storage material interposed therebetween for storing water, wherein the back sheet member is flexible. A plurality of recesses for filling and holding the water storage material, having a plurality of recesses between the recesses, having a through hole through which the water swellable storage material can appropriately pass; Is a water-impervious sheet which is flexible and impermeable to water and has a water-swelling storage material filled and held in a recessed state.
【００１３】そしてまた、（３）、裏シート部材として
ダブルラッセル編地を使用する上記（２）の遮水シート
に存する。Further, (3) the water-impervious sheet according to the above (2), wherein a double Russell knit fabric is used as a back sheet member.
【００１４】そしてまた、（４）、ダブルラッセル編地
の編密度が、２０〜６０コース／インチ及び１６〜４０
ウエール／インチである上記（３）の遮水シートに存す
る。(4) The knitting density of the double Russell knitted fabric is 20 to 60 courses / inch and 16 to 40 courses / inch.
It is in the impermeable sheet of (3) above, which is wale / inch.
【００１５】そしてまた、（５）、裏面シート部材の凹
部の開口面積率は１０〜８０％である上記（１）〜
（４）のいずれか１つの遮水シートに存する。[0015] (5) The opening area ratio of the concave portion of the back sheet member is 10 to 80%.
(4) It exists in any one of the impermeable sheets.
【００１６】そしてまた、（６）、柔軟性且つ透水性を
有し水膨潤性保蓄材を充填保持した多数の凹部を備えた
裏シート部材と、裏シート部材に接着又は溶着され柔軟
性且つ不透水性を有し水膨潤性保蓄材を充填保持した状
態の凹部を封鎖する表シート部材とよりなる遮水シート
であって、裏シート部材は編密度が２０〜６０コース／
インチ及び１６〜４０ウエール／インチであるダブルラ
ッセル編地で形成され、該凹部間が水膨潤性保蓄材を通
過可能な通穴性を有し、凹部の開口面積率は１０〜８０
％である遮水シートに存する。本発明は、この目的に沿
ったものであれば、上記１〜６の中から選ばれた２つ以
上を組み合わせた如何なる構造も採用可能である。(6) A back sheet member having a large number of concave portions filled and held with a water-swellable storage material having flexibility and water permeability, and a flexible and adhered or fused back sheet member. A water-impermeable sheet comprising a front sheet member that seals off a concave portion in a state of being impermeable and filled with a water-swellable storage material, wherein the back sheet member has a knitting density of 20 to 60 courses /
It is formed of a double raschel knitted fabric having an inch and 16 to 40 wale / inch, has a hole between the recesses capable of passing a water-swellable storage material, and has an opening area ratio of 10 to 80.
% In the impermeable sheet. The present invention can employ any structure in which two or more selected from the above 1 to 6 are combined as long as this object is met.
【００１７】[0017]
【発明の実施の形態】以下、本発明の各実施の形態を図
面に基づき説明する。本発明の遮水シートＳは、基本的
に、裏シート部材２、表シート部材４、及び水を保蓄す
るために両者間に介在する水膨潤性保蓄材３とを有する
ものである。Embodiments of the present invention will be described below with reference to the drawings. The impermeable sheet S of the present invention basically has a back sheet member 2, a front sheet member 4, and a water-swellable storage material 3 interposed therebetween for storing water.
【００１８】裏シート部材は、水膨潤性保蓄材３を充填
保持するための独立した多数の凹部１を有しており、こ
の凹部１には水膨潤性保蓄材３が充填されている。ま
た、凹部間（いわゆる隔壁部）が水膨潤性保蓄材３を適
度に通過可能な通孔性を有しており、凹部は相互に水膨
潤性保蓄材の転移移動を行うことができる。そして凹部
は、水膨潤性保蓄材を保持する保持力も同時に兼ね備え
ているものである。The back sheet member has a large number of independent concave portions 1 for filling and holding the water-swellable storage material 3, and the concave portions 1 are filled with the water-swellable storage material 3. . In addition, the space between the concave portions (so-called partition wall portion) has a porosity that allows the water-swellable storage material 3 to appropriately pass therethrough, and the concave portions can transfer and move the water-swellable storage material mutually. . The recess also has a holding force for holding the water-swellable storage material at the same time.
【００１９】また裏シート部材２は柔軟性を備えてお
り、そのため本発明のシートを現場で取り付ける場合、
屈曲し易く施工性がよい。更に裏シート部材２は、透水
性を有するので、例えば、山留壁５にシートが敷設され
た場合、山留壁５からの漏水がシートに吸収される。そ
の結果、水を吸収した水膨潤性保蓄材３は、膨潤し内圧
が高まって硬くなり、水の通過を遮断するのである。Further, the back sheet member 2 has flexibility, so that when the sheet of the present invention is installed on site,
Easy to bend and good workability. Further, since the back sheet member 2 has water permeability, for example, when a sheet is laid on the retaining wall 5, water leakage from the retaining wall 5 is absorbed by the sheet. As a result, the water-swellable storage material 3 that has absorbed water swells and becomes harder due to an increase in internal pressure, thereby blocking the passage of water.
【００２０】裏シート部材２の材料としては、上述のよ
うに、柔軟性と透水性を有し、表シート部材４が凹部１
を封鎖した状態で該凹部間が水膨潤性保蓄材３を適度に
通過させる通孔性を有するものであれば特に制限されな
いが、特に繊維からなる連結糸によって隔壁をつくって
いるダブルラッセル編地が好適である。ここで封鎖する
には、表シート部材４や裏シート部材２の材質によって
異なるが、通常、接着又は溶着が採用される。As described above, the material of the back sheet member 2 has flexibility and water permeability, and the front sheet member 4
Is not particularly limited as long as the space between the concave portions has a permeability that allows the water-swellable storage material 3 to pass through appropriately in a closed state. The ground is preferred. Here, in order to close, it depends on the material of the front sheet member 4 and the back sheet member 2, but usually, adhesion or welding is adopted.
【００２１】この裏シート部材２に形成された凹部１
は、水膨潤性保蓄材３を保持すると共に、適度に水膨潤
性保蓄材３を通過させる必要があるために、ダブルラッ
セル編地の編密度は、２０〜６０コース／インチ及び１
６〜４０ウエール／インチの範囲が好ましく採用され
る。この場合、ダブルラッセル編地の連結糸が水膨潤性
保蓄材を適度に通過させることとなる。The concave portion 1 formed in the back sheet member 2
Since it is necessary to hold the water-swellable storage material 3 and pass the water-swellable storage material 3 appropriately, the knitting density of the double Russell knitted fabric is 20 to 60 courses / inch and 1
A range of 6 to 40 wale / inch is preferably employed. In this case, the connecting yarn of the double Russell knitted fabric passes the water-swellable storage material appropriately.
【００２２】裏シート部材の材質としては、水に接する
ことから比較的、耐水性のある天然繊維、人造繊維、合
成繊維等が用いられる。As the material of the back sheet member, natural fibers, artificial fibers, synthetic fibers, etc., which are relatively water-resistant because they come into contact with water, are used.
【００２３】裏シート部材２において、凹部１の開口の
占める割合、すなわち、開口面積率は、１０〜８０％が
採用される。これはできるだけ大きい方がよいが、大き
過ぎて８０％を越えると凹部の形成維持が十分確保でき
なくなり、１０％より小さいと自己修復性を有するだけ
の十分な水膨潤性保蓄材を充填保持できない。In the back sheet member 2, the ratio of the opening of the concave portion 1, that is, the opening area ratio is 10 to 80%. This should be as large as possible, but if it is too large and exceeds 80%, the maintenance of the formation of the recesses cannot be sufficiently ensured. If it is less than 10%, a sufficient water-swellable storage material having self-healing properties is filled and held. Can not.
【００２４】裏シート部材２の凹所内に充填保持される
水膨潤性保蓄材３は、水を吸収することにより膨潤して
圧力が高まるため硬化し、一旦、膨潤した後は、水の通
過を遮断する層となる。The water-swellable storage material 3 filled and held in the recess of the back sheet member 2 swells by absorbing water and increases in pressure, so that it hardens, and once swells, passes water. Layer.
【００２５】水膨潤性保蓄材３としては、粉体状であ
り、例えば、水膨潤性等の各種粘土、水膨潤性のベント
ナイト、水膨潤性の高分子剤等が採用され、それぞれ単
独或いは必要に応じ混合して用いられる。水膨潤性保蓄
材３の粉径は、保持能力の観点から０．１〜４ｍｍの範
囲が好ましい。また、水膨潤性保蓄材の裏シート部材に
充填保持される充填量は、通常、１〜２０ｋｇ／ｍ2 程
度である。The water-swellable storage material 3 is in the form of powder, for example, water-swellable clays, water-swellable bentonite, water-swellable polymer agents, etc., each of which is used alone or separately. It is used by mixing if necessary. The powder diameter of the water-swellable storage material 3 is preferably in the range of 0.1 to 4 mm from the viewpoint of the holding ability. The filling amount of the water-swellable storage material filled and held in the back sheet member is usually about 1 to 20 kg / m 2 .
【００２６】水膨潤性保蓄材３には、必要に応じて、金
属封鎖剤（例えば、アクリル酸共重合体、スルフォン化
スチレン共重合体など）や活性炭等も混合して用いられ
る場合もある。The water-swellable storage material 3 may be mixed with a metal-sequestering agent (for example, acrylic acid copolymer, sulfonated styrene copolymer, etc.), activated carbon, or the like, if necessary. .
【００２７】一方、表シート部材４は、裏シート部材２
の凹部１に充填保持された水膨潤性保蓄材を封じ込むた
めのものであり、封じ込めた状態で裏シート部材２に接
着又は溶着される。表シート部材４は柔軟性を備えてお
り、裏シート部材２と同様に、現場で取り付ける際の施
工性がよい。また、表シート部材４は、裏シート部材の
凹部１に水膨潤性保蓄材を充填保持した状態で完全に封
じ込こむ必要があるために不透水性を有するものとす
る。更に、施工後は表面に露出することから、耐薬品
性、耐候性のあるものが好ましい。On the other hand, the front sheet member 4 is
For sealing the water-swellable storage material filled and held in the concave portion 1, and is bonded or welded to the back sheet member 2 in the sealed state. The front sheet member 4 has flexibility and, like the back sheet member 2, has good workability when attached at the site. In addition, the front sheet member 4 has water impermeability because it needs to be completely sealed in a state where the water swellable storage material is filled and held in the concave portion 1 of the back sheet member. Furthermore, since it is exposed on the surface after construction, a material having chemical resistance and weather resistance is preferable.
【００２８】例えば、エチレンプロピレンゴム、スチレ
ンブタジエンゴム、ブタジエンゴム等の合成ゴムシート
材、ポリ塩化ビニール、エチレン−酸ビ共重合体、ポリ
オレフィン系樹脂、ポリフロロエチレン共重合体等の合
成樹脂シート材、アスファルト系のシート材等が採用さ
れる。また、地中において水で徐々に溶解していくもの
や、微生物で徐々に分解していくシート材も採用され
る。For example, synthetic rubber sheet materials such as ethylene propylene rubber, styrene butadiene rubber, butadiene rubber, etc., and synthetic resin sheet materials such as polyvinyl chloride, ethylene-acid copolymer, polyolefin resin, polyfluoroethylene copolymer, etc. , Asphalt-based sheet materials and the like are employed. Also, a sheet material that is gradually dissolved in water under the ground and a sheet material that is gradually decomposed by microorganisms are used.
【００２９】ところで、本発明の遮水シートは、裏シー
ト部材２に形成された多数の独立しした凹部１に、上述
したように粉粒状の水膨潤性保蓄材３を小分けした状態
で充填保持するためのものであり、凹部１は、裏シート
全体に均等に分散して形成されている。In the meantime, the water-blocking sheet of the present invention fills a large number of independent concave portions 1 formed in the back sheet member 2 with the water-swellable storage material 3 in the form of powder as described above. The recesses 1 are provided for holding, and are uniformly distributed over the entire back sheet.
【００３０】遮水シートが穿孔された場合でも、図３に
模式的に示すように、周囲からその穴Ｈの部分に水膨潤
性保蓄材３が転移移動されて即座に埋まり込み、修復す
る特性、いわゆる自己修復性を発揮する。なお、遮水シ
ートＳの厚みとしては、屈曲性の観点から２ｍｍ〜１０
ｍｍが好適に採用されている。以下、本発明における遮
水シートの施工の実施例を挙げて具体的に説明する。Even when the water-blocking sheet is perforated, as shown schematically in FIG. 3, the water-swellable storage material 3 is transferred from the periphery to the hole H and immediately embedded and repaired. Exhibits properties, so-called self-healing properties. The thickness of the impermeable sheet S is 2 mm to 10 mm from the viewpoint of flexibility.
mm is suitably employed. Hereinafter, specific examples will be described with reference to working examples of the construction of the impermeable sheet according to the present invention.
【００３１】[0031]
【実施例１】本発明の遮水シートを、水を含む地下土壌
の山留壁に施工した実験例である。裏シート部材として
多数の凹部を有するダブルラッセル編地（編密度：３７
コース／インチ、２２ウエール／インチ、開口面積率：
５５％）を用いた。水膨潤性保蓄材として、粒状のベン
トナイト〔商品名クニゲル（クニミネ工業株式会社
製）〕、粒度０．２〜１ｍｍを使用し：４ｋｇ／ｍ2 を
裏シート部材の凹部に充填した。Example 1 This is an experimental example in which the impermeable sheet of the present invention was applied to a retaining wall of underground soil containing water. Double Russell knitted fabric having a large number of concave portions as a back sheet member (knitting density: 37
Course / inch, 22 wale / inch, open area ratio:
55%). As the water-swellable storage material, granular bentonite (trade name: Kunigel (manufactured by Kunimine Industries Co., Ltd.)) having a particle size of 0.2 to 1 mm was used: 4 kg / m 2 was filled in the concave portion of the back sheet member.
【００３２】ここで、裏素材は２枚の地組織とそれらを
結合する連結糸とよりなるダブルラッセル編地であっ
て、一方の地組織（グランド面）の筬Ｌ１，Ｌ２には１
５０デニール／４８フィラメントのポリエステルフィラ
メント糸１０７２本を通して、鎖サデン組織とし、他方
（メッシュ面）の地組織の筬Ｌ４，Ｌ５には１５０デニ
ール／４８フィラメントのポリエステルフィラメント糸
５５２本を通し、ハニカム組織とし、連結糸は３０デニ
ールのポリエステルモノフィラメント糸を１０７２本通
し、ダブルラッセル編機（カールマイヤ社製）にて、１
２４ｃｍの幅に編み上げたものである。編み上がったも
のは、グランド面が３７コース／インチ×２２ウェル／
インチの鎖サテン組織で、メッシュ面はタテ方向５穴／
インチ×ヨコ方向６穴／インチのハニカム組織で厚さは
６．２ｍｍの編地である。Here, the backing material is a double Russell knitted fabric composed of two ground structures and connecting yarns connecting them, and one reed L1 and L2 of one ground structure (ground surface) has one.
A chain saddle structure is formed by passing 1072 50 denier / 48 filament polyester filament yarns, and 552 150 denier / 48 filament polyester filament yarns are passed through the other reeds L4 and L5 (mesh surface) to form a honeycomb structure. The connecting yarn was passed through 1072 30-denier polyester monofilament yarns and passed through a double Russell knitting machine (manufactured by Karl-Miya Co., Ltd.).
It is woven to a width of 24 cm. The knitted one has a ground surface of 37 courses / inch x 22 wells /
Inch chain satin structure, mesh surface in vertical 5 holes /
The knitted fabric has a honeycomb structure of 6 inches / inch in the horizontal direction and a thickness of 6.2 mm.
【００３３】表シート部材として、エチレン−酸ビ共重
合体のシートを使った。そして、ダブルラッセル編地の
凹部にベントナイトを充填し、それに３０ミクロンのエ
チレン−酸ビ共重合体のシートを熱と圧力で溶着し凹部
を封鎖した。このような構成の遮水シートを使ってダブ
ルラッセル編地面を水を含む地下土壌の山留面に接触さ
せて敷設した。敷設施工の後、山留面からの湧水をベン
トナイトが十分吸収している状態が観察された。次に、
敷設された遮水シートにエチレン−酸ビ共重合体のシー
ト側から、径２ｍｍの穴を開け、それを観察した。As the front sheet member, a sheet of an ethylene-acid bi-copolymer was used. Then, bentonite was filled in the concave portion of the double Russell knitted fabric, and a sheet of a 30-micron ethylene-acid bipolymer was welded thereto by heat and pressure to seal the concave portion. Using the water-impervious sheet having such a configuration, the double raschel knitted ground was laid in contact with the retaining surface of the underground soil containing water. After laying, it was observed that bentonite was sufficiently absorbing the spring water from the retaining surface. next,
A hole having a diameter of 2 mm was formed in the laid water-impervious sheet from the sheet side of the ethylene-oxy-copolymer, and the hole was observed.
【００３４】その結果、穴の部分にその周囲から水膨潤
性保蓄材が移動し、速やかに穴に埋まり込んだ。そのた
め穴を開けたにもかかわらず水の漏れは全く生じない。
この実施例の遮水シートは、施工の際、ダブルラッセル
編地を内側にして巻込んでおくことができ、運搬の際、
水が降りかかっても、外側が不透水性のため不用意に施
工前に水膨潤性保蓄材が膨潤するようなことがなかっ
た。また、施工の後、エチレン−酸ビ共重合体のシート
が表面に露出している状態であるため、水を降りかけて
も全くベントナイトに影響は無かった。As a result, the water-swellable storage material moved from the periphery to the hole, and was quickly buried in the hole. Therefore, water leakage does not occur at all even though the holes are made.
The impermeable sheet of this embodiment can be wound with the double raschel knitted fabric inside during construction,
Even when water began to fall, the water-swellable storage material did not swell inadvertently before construction because the outside was impervious. In addition, after the application, since the sheet of the ethylene-acid bipolymer was exposed on the surface, the bentonite had no effect even when the water was dropped.
【００３５】ところで、この実施例１では、遮水シート
のダブルラッセル編地面を水を含む地下土壌の山留面に
接触させて敷設した施工例を示したが、本発明の遮水シ
ートの使用態様は、施工現場によって種々異なる場合が
ある。そのため、上述の使用方法とは逆に、遮水シート
のエチレン−酸ビ共重合体を水を含む地下土壌の山留面
に接触させて敷設した施工実験も行ってみた。その場
合、山留面からの湧水によるベントナイトの膨潤は全く
なく、施工時の貼り込み作業が極めてやり易かった。但
し、この場合、表面側に露出したダブルラッセル編地の
上に不透水シートを敷設することが好ましい。In the first embodiment, an example was shown in which the double raschel knitted ground of the impermeable sheet was laid in contact with the retaining surface of the underground soil containing water. The mode may vary depending on the construction site. Therefore, contrary to the above-described method of use, a construction experiment was conducted in which the ethylene-acid-bipolymer of the water-blocking sheet was laid in contact with the retaining surface of the underground soil containing water. In that case, there was no swelling of the bentonite due to the spring water from the mountain retaining surface, and the sticking work during construction was extremely easy. However, in this case, it is preferable to lay the water-impermeable sheet on the double raschel knitted fabric exposed on the surface side.
【００３６】[0036]
【実施例２】実施例１において、裏シート部材として多
数の凹部を有するダブルラッセル編地（編密度：５０コ
ース／インチ、３５ウエール／インチ、開口面積率：６
０％）を用いた以外、同様の実験を行って観察した。そ
の結果、実施例１とほぼ同じ結果であった。Example 2 In Example 1, a double Russell knitted fabric having a large number of concave portions as a back sheet member (knitting density: 50 courses / inch, 35 wale / inch, opening area ratio: 6)
0%) and the same experiment was carried out. As a result, the result was almost the same as that of Example 1.
【００３７】[0037]
【比較例１】裏シート部材とし実施例１と同じダブルラ
ッセル編地（編密度：３７コース／インチ、２２ウエー
ル／インチ、開口面積率：５５％）を用いた。水膨潤性
保蓄材として、粒状のベントナイト〔商品名クニゲル
（クニミネ工業株式会社）製〕、粒度０．２〜１ｍｍを
使用した。Comparative Example 1 The same double raschel knitted fabric as in Example 1 (knitting density: 37 courses / inch, 22 wales / inch, opening area ratio: 55%) was used as a back sheet member. As the water-swellable storage material, granular bentonite (trade name, manufactured by Kunigel Co., Ltd.) having a particle size of 0.2 to 1 mm was used.
【００３８】表シート部材として、透水性の不織布（目
付１００ｇ／ｍ2 ）を使用した。そして、ダブルラッセ
ル編地の凹部にベントナイトを充填し、それに不織布を
接着し凹部を封鎖した。このような構成の遮水シートを
使ってダブルラッセル編地面を水を含む地下土壌の山留
面に接触させて敷設した。敷設施工の後、観察すると、
山留面からの湧水をベントナイトが吸収しているが、継
ぎ部分の密着が悪くなっており、また表面の不織布から
水が滲み出ている部分が散見された。敷設された遮水シ
ートに実施例１と同様に不織布側から径０．２ｍｍの穴
を開け、それを観察した。A water-permeable nonwoven fabric (having a basis weight of 100 g / m 2 ) was used as the front sheet member. Then, the bent portion of the double Russell knitted fabric was filled with bentonite, a nonwoven fabric was adhered to the bentonite, and the recess was closed. Using the water-impervious sheet having such a configuration, the double raschel knitted ground was laid in contact with the retaining surface of the underground soil containing water. After laying, observe
Although bentonite absorbed the spring water from the mountain surface, the adhesion at the joint was poor, and there were sporadic water seepage from the nonwoven fabric on the surface. A hole having a diameter of 0.2 mm was made in the laid water-impervious sheet from the nonwoven fabric side in the same manner as in Example 1, and the hole was observed.
【００３９】その結果、穴の部分に水膨潤性保蓄材であ
るベントナイトが周囲から十分移動できず、穴が十分埋
めきれない状態となっていた。施工の際、ダブルラッセ
ル編地を内側にして巻込んでおいた場合、水が降りかか
ると、外側の不織布を通して水が通過し、敷設する前に
既にベントナイトが膨潤して遮水シートが一部硬化し
た。また、施工済の後、織布が露出している状態である
ため、水を降りかけると即座にベントナイトが膨潤し遮
水シートが一部硬化した。As a result, bentonite, which is a water-swellable storage material, could not sufficiently move from the surroundings into the hole, and the hole could not be completely filled. If the double russell knitted fabric is wrapped inside during construction, water will pass through the outer non-woven fabric when the water falls, and the bentonite has already swelled before laying and the water impermeable sheet partially hardens did. In addition, since the woven fabric was exposed after the construction was completed, bentonite immediately swelled when the water was poured, and the water-blocking sheet was partially hardened.
【００４０】以上、本発明を説明してきたが、本発明は
上述の実施の形態や実施例に限定されることなく、その
目的に沿う限り、変更が可能である。例えば、表シート
部材は、織編物や不織布等の透水性の素材の上に合成樹
脂フイルム等を積層して一体化し不透水性にしたものを
使用しても良い。また、本発明の遮水シートの裏シート
部材側に不透水性のフイルムを貼着して使用することも
場合によっては可能である。この場合には、当然先述し
たように、貼り込み地に雨水等が降りかかることによる
ベントナイトの膨潤を防止できる。Although the present invention has been described above, the present invention is not limited to the above-described embodiments and examples, and can be modified as long as the object is met. For example, the front sheet member may be made of a water-permeable material such as a woven or knitted fabric or a nonwoven fabric, and a synthetic resin film or the like may be laminated and integrated to make it impermeable. In some cases, an impermeable film may be attached to the back sheet member side of the water-impervious sheet of the present invention. In this case, as described above, it is possible to prevent swelling of bentonite due to rainwater or the like falling on the stuck place.
【００４１】[0041]
【発明の効果】本発明の遮水シートは、水膨潤性保蓄材
３が裏シート部材２間に凹部１ごとに小分けされた状態
で独立して充填保持されているので、仮に遮水シートが
破断したり穿孔したりしても、水膨潤性保蓄材３が逃げ
るのは、破断部や穴開き部の周辺のみであって、水膨潤
性保蓄材３の流出量を最小限に維持できる。According to the present invention, since the water-swellable storage material 3 is independently filled and held between the back sheet members 2 in a state of being divided into the concave portions 1, the water-impermeable sheet is temporarily provided. Even if the water swellable storage material 3 breaks or is perforated, the water swellable storage material 3 escapes only in the vicinity of the broken portion or the perforated portion. Can be maintained.
【００４２】また裏シート部材が水膨潤性保蓄材３を適
度に通過可能な通孔性を有するので、穿孔したり破断し
た場合、穴や破断部分にその周囲から水膨潤性保蓄材が
速やかに移動して穴に埋まり込み、水の漏れが封鎖され
る。また表シート部材は不透性であるので、水膨潤性保
蓄材がそれに沿って移動し易く穴を埋め易い。Further, since the back sheet member has a permeation property capable of appropriately passing through the water-swellable storage material 3, when the hole is punctured or broken, the water-swellable storage material is formed around the hole or the broken portion from the periphery. It moves quickly and is buried in the hole, blocking any water leakage. Further, since the front sheet member is impermeable, the water-swellable storage material can easily move along the surface sheet member and can easily fill the holes.
【００４３】また、施工する場合、裏シート部材を内側
にして巻込んでおくことができ、運搬の際水が降りかか
っても、外側が不透水性の表シート部材であるためため
不用意に水膨潤性保蓄材が膨潤し遮水シートが部分的に
硬化するようなことはない。また、施工した後も、表シ
ート部材が露出している状態にできるため、水を降りか
けても全く水膨潤性保蓄材に影響は無い。Also, in the case of construction, the back sheet member can be wound inside with the back sheet member inside, and even if water starts to fall during transportation, the outside is a water impervious front sheet member, so careless care is required. The water-swellable storage material does not swell and the water-impervious sheet does not partially cure. In addition, even after construction, the front sheet member can be exposed, so that even if water is dropped, there is no effect on the water-swellable storage material.
【図１】図１は、本発明の遮水シートを示す概略図であ
る。FIG. 1 is a schematic view showing a water impermeable sheet of the present invention.
【図２】図２は、本発明の遮水シートの断面を模式的に
示す図である。FIG. 2 is a diagram schematically showing a cross section of a water impermeable sheet of the present invention.
【図３】図３は、穿孔した穴に対して水膨潤性保蓄材が
転移移動される作用を模式的に示した図である。FIG. 3 is a view schematically showing an action in which a water-swellable storage material is transferred to a perforated hole.
【図４】図４は、本発明の遮水シートを山留壁へ施工し
た例を示す。FIG. 4 shows an example in which the impermeable sheet of the present invention is applied to a retaining wall.
１…凹部 ２…裏シート部材 ３…水膨潤性保蓄材 ４…表シート部材 ５…山留壁 ６…駆体コンクリート ７…シーリング材 ８…保護モルタル Ｓ…遮水シート DESCRIPTION OF SYMBOLS 1 ... Depression 2 ... Back sheet member 3 ... Water swelling storage material 4 ... Front sheet member 5 ... Retaining wall 6 ... Driving concrete 7 ... Sealing material 8 ... Protective mortar S ... Waterproof sheet
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大岩 雄次 愛知県名古屋市西区貴生町68番地 株式会 社ナゴヤセーレン内 Ｆターム(参考） 2D018 DA03 4D004 AA41 AA46 BB05 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yuji Oiwa 68th Kiyocho, Nishi-ku, Nagoya-shi, Aichi F-term in Nagoya Seiren Co., Ltd. 2D018 DA03 4D004 AA41 AA46 BB05
Claims (6)
するために両者間に介在する水保蓄材とよりなる遮水シ
ートであって、裏シート部材が水膨潤性保蓄材を充填保
持するための多数の凹部を備え、該凹部間は水保蓄材が
適度に通過可能な通孔性を有し、表シート部材が水保蓄
材を充填保持した状態の凹部を封鎖してなることを特徴
とする遮水シート。1. A water-blocking sheet comprising a back sheet member, a front sheet member, and a water storage material interposed therebetween for storing water, wherein the back sheet member comprises a water-swellable storage material. It has a large number of recesses for filling and holding, between the recesses has a perforation that allows the water storage material to appropriately pass, and the front sheet member seals the recess where the water storage material is filled and held. A water-impervious sheet comprising:
するための両者間に介在する粒状の水保蓄材とよりなる
遮水シートであって、裏シート部材が柔軟性且つ透水性
を有し、水保蓄材を充填保持するための多数の凹部を備
え、該凹部間は水膨潤性保蓄材が適度に通過可能な通穴
性を有し、表シート部材が柔軟性且つ不透水性を有して
水膨潤性保蓄材を充填保持した状態の凹部を封鎖してな
ることを特徴とする遮水シート。2. A water-shielding sheet comprising a back sheet member, a front sheet member, and a granular water storage material interposed therebetween for storing water, wherein the back sheet member is flexible and water-permeable. It has a number of recesses for filling and holding the water storage material, between the recesses has a through hole through which the water swellable storage material can appropriately pass, the front sheet member is flexible and What is claimed is: 1. A water-blocking sheet comprising a water-impermeable, water-swellable storage material filled and held in a recessed state.
を使用することを特徴とする請求項２記載の遮水シー
ト。3. The impermeable sheet according to claim 2, wherein a double raschel knitted fabric is used as the back sheet member.
６０コース／インチ及び１６〜４０ウエール／インチで
あることを特徴とする請求項３記載の遮水シート。4. The knitting density of a double Russell knitted fabric is 20 to 20.
4. The impermeable sheet according to claim 3, wherein the sheet is 60 courses / inch and 16-40 wale / inch.
０〜８０％であることを特徴とする請求項１〜４のいず
れか１項記載の遮水シート。5. An opening area ratio of a concave portion of the back sheet member is 1
The water impermeable sheet according to any one of claims 1 to 4, wherein the water impermeable sheet is 0 to 80%.
を充填保持した多数の凹部を備えた裏シート部材と、裏
シート部材に接着又は溶着され柔軟性且つ不透水性を有
し水膨潤性保蓄材を充填保持した状態の凹部を封鎖する
表シート部材とよりなる遮水シートであって、裏シート
部材は編密度が２０〜６０コース／インチ及び１６〜４
０ウエール／インチであるダブルラッセル編地で形成さ
れ、該凹部間が水膨潤性保蓄材を通過可能な通穴性を有
し、凹部の開口面積率は１０〜８０％であることを特徴
とする遮水シート。6. A back sheet member having a plurality of concave portions filled and held with a water-swellable storage material having flexibility and water permeability, and a flexible and water-impermeable material adhered or welded to the back sheet member. A water-blocking sheet comprising a front sheet member for closing a concave portion filled with a water-swellable storage material, and a back sheet member having a knitting density of 20 to 60 courses / inch and 16 to 4 knits.
It is formed of a double raschel knitted fabric of 0 wale / inch, has a hole passing between the recesses through which the water-swellable storage material can pass, and the opening area ratio of the recesses is 10 to 80%. And impermeable sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37586798A JP3876558B2 (en) | 1998-12-21 | 1998-12-21 | Waterproof sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37586798A JP3876558B2 (en) | 1998-12-21 | 1998-12-21 | Waterproof sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000186316A true JP2000186316A (en) | 2000-07-04 |
| JP3876558B2 JP3876558B2 (en) | 2007-01-31 |
Family
ID=18506190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP37586798A Expired - Fee Related JP3876558B2 (en) | 1998-12-21 | 1998-12-21 | Waterproof sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3876558B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002348857A (en) * | 2001-05-24 | 2002-12-04 | Dai Nippon Construction | Core material for earth retaining and its execution method |
| KR101838598B1 (en) * | 2017-12-01 | 2018-04-27 | 주식회사 제이제이이엔지 | Construction Method of Golf Course Pond |
-
1998
- 1998-12-21 JP JP37586798A patent/JP3876558B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002348857A (en) * | 2001-05-24 | 2002-12-04 | Dai Nippon Construction | Core material for earth retaining and its execution method |
| KR101838598B1 (en) * | 2017-12-01 | 2018-04-27 | 주식회사 제이제이이엔지 | Construction Method of Golf Course Pond |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3876558B2 (en) | 2007-01-31 |
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