JPH1128438A - Impervious sheet - Google Patents
Impervious sheetInfo
- Publication number
- JPH1128438A JPH1128438A JP9188534A JP18853497A JPH1128438A JP H1128438 A JPH1128438 A JP H1128438A JP 9188534 A JP9188534 A JP 9188534A JP 18853497 A JP18853497 A JP 18853497A JP H1128438 A JPH1128438 A JP H1128438A
- Authority
- JP
- Japan
- Prior art keywords
- water
- swelling
- connection
- junctures
- connection portion
- 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
Landscapes
- Laminated Bodies (AREA)
- 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、例えば廃棄物処分
場における汚染水の拡散を防止するための遮水のような
遮水技術に関し、特に汚染水などの拡散を防止するため
の鉛直遮水構造に用いるのに好適な遮水シートに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seepage control technique such as a seepage control method for preventing the diffusion of contaminated water at a waste disposal site, and more particularly to a vertical seepage control method for preventing the diffusion of contaminated water and the like. The present invention relates to a waterproof sheet suitable for use in a structure.
【０００２】[0002]
【従来の技術】例えば廃棄物処分場を例にとると、そこ
から漏れ出す汚染水の拡散を防止するために、鉛直遮水
が用いられる。鉛直遮水は、廃棄物処分場の周囲を囲む
ようにし、且つ粘性土質の不透水層まで達するようにし
て遮水材を地中に立設する方式できる。この鉛直遮水方
式で用いる遮水材の代表的な一つとして合成樹脂製の遮
水シートがある。このような遮水シートを用いた鉛直遮
水方式の典型的な例が特公平６−１１９９４号公報に開
示されている。2. Description of the Related Art For example, in the case of a waste disposal site, vertical water barrier is used to prevent the diffusion of contaminated water leaking from the site. The vertical water barrier can be a method in which a water barrier material is erected underground so as to surround the waste disposal site and reach a water-impermeable layer of viscous soil. A typical example of the water-blocking material used in the vertical water-blocking method is a water-blocking sheet made of synthetic resin. A typical example of a vertical water barrier system using such a water barrier sheet is disclosed in Japanese Patent Publication No. 6-11994.
【０００３】上記公報から理解できるように、遮水シー
トは、左右各側辺に雄形接続部と雌形接続部が設けられ
た所定のサイズの方形状に形成されている。そしてそれ
ぞれの雄形接続部と雌形接続部を介して複数枚を接続し
て用いられる。そのためそれぞれの接続部における遮水
性が問題になる。この接続部における遮水性の確保に関
して特公平６−１１９９４号公報に開示の技術では、水
膨張性の樹脂棒を接続部に組み込むようにしている。つ
まり接続部に水が侵入すると、この水で樹脂棒が膨張
し、これにより接続部の水密性を高めて遮水性を確保す
る。[0003] As can be understood from the above-mentioned publication, the impermeable sheet is formed in a rectangular shape of a predetermined size in which a male connection portion and a female connection portion are provided on each of the left and right sides. And a plurality of sheets are connected and used via each male connection part and female connection part. Therefore, there is a problem of water blocking at each connection portion. In the technique disclosed in Japanese Patent Publication No. 6-11994 for ensuring the water shielding at the connection portion, a water-swellable resin rod is incorporated in the connection portion. That is, when water enters the connecting portion, the water expands the resin rod, thereby increasing the watertightness of the connecting portion and securing water shielding.
【０００４】このような樹脂棒を接続部に別部品として
組み込む方式は、原理的には十分な遮水性を接続部に与
える。ただ、遮水シートを地中に埋め込んでゆく工事の
際に、樹脂棒が損傷したり離脱したりして遮水性を損な
うようなことのないように、細心の注意を必要とし、工
事の負担が大きくなる。このことは有効性の高い鉛直遮
水構造を廃棄物処分場などに広く利用する上で好ましい
ことでない。[0004] The method of incorporating such a resin rod into the connection portion as a separate component gives sufficient water blocking to the connection portion in principle. However, during the work of embedding the impermeable sheet in the ground, careful attention is required so that the resin rods will not be damaged or come off and impair the waterproofness. Becomes larger. This is not preferable in the case where a highly effective vertical water impermeable structure is widely used in a waste disposal site or the like.
【０００５】[0005]
【発明が解決しようとする課題】したがって本発明の目
的は、上記のような問題点を有効に解消できる遮水シー
トの提供にある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a waterproof sheet which can effectively solve the above-mentioned problems.
【０００６】[0006]
【課題を解決するための手段】本発明による遮水シート
は、一方の側辺に第１の接続部が設けられるとともに、
他方の側辺に第２の接続部が設けられており、それぞれ
における第１の接続部と第２の接続部の係合により複数
枚を接続して用いられ、一定領域を囲むように地中に立
設することで前記領域を遮水的に閉鎖するのに機能す
る。そして第１の接続部と第２の接続部の何れか一方ま
たは両方に、吸水で膨潤する膨潤層を一体的に備えてい
る。According to the water impermeable sheet of the present invention, a first connecting portion is provided on one side,
A second connecting portion is provided on the other side, and a plurality of the connecting portions are used by engaging the first connecting portion and the second connecting portion in each of the second connecting portions. It functions to close the area in a water-tight manner by standing upright. Then, one or both of the first connection portion and the second connection portion are integrally provided with a swelling layer which swells due to water absorption.
【０００７】本発明による遮水シートは、第１の接続部
や第２の接続部が膨潤層を一体的に備えているので、地
中に埋め込む工事の際に膨潤層を損傷するなどの問題を
効果的に避けることができる。したがって膨潤構造によ
る原理上の遮水性を損なうことがなく、常に安定した遮
水性を接続部に確保することができる。[0007] In the water impermeable sheet according to the present invention, since the first connection portion and the second connection portion are integrally provided with the swelling layer, there is a problem that the swelling layer is damaged when the work is embedded in the ground. Can be effectively avoided. Therefore, it is possible to always ensure stable water shielding at the connection portion without impairing the theoretical water shielding by the swelling structure.
【０００８】上記のような遮水シートについては、膨潤
剤を添加した合成樹脂でその膨潤層を形成するのが好ま
しい。膨潤剤としては、例えばアクリル酸、ポリアクリ
ル酸塩、アクリル酸ソーダ重合体、ポリエチレンオキサ
イド変性物、アクリル酸ビニルアルコール重合体などを
用いることができる。[0008] With respect to the above-mentioned water-impervious sheet, it is preferable to form a swelling layer with a synthetic resin to which a swelling agent is added. As the swelling agent, for example, acrylic acid, polyacrylate, sodium acrylate polymer, modified polyethylene oxide, vinyl alcohol acrylate polymer and the like can be used.
【０００９】このような膨潤層を第１の接続部や第２の
接続部の接続部に一体化させるには二つの方式が可能で
ある。一つは本体部の成形と同時に膨潤層を一体成形す
る方式であり、他は別工程で成形した膨潤層を接着や溶
着などで接合させて一体化する方式である。加工性や一
体化強度の点で一体成形方式がより優れている。一体成
形方式には、本体部と膨潤層の一体成形性が関係する。
この点について、上記のように膨潤剤の添加で膨潤層を
形成することが有効となる。つまり膨潤剤添加とするこ
とで膨潤層に用いる合成樹脂の選択に自由度が高くな
り、本体部と同じ合成樹脂を膨潤層に用いることがで
き、本体部分に対する膨潤層の強固な一体化を与えやす
くなる。このような一体成形方式は、硬さなどの物理的
性能や化学的安定性に優れ、遮水シートとして最も適し
ている一方で接着が困難なポリエチレン樹脂で本体部分
を形成する場合に特に有効である。In order to integrate such a swelling layer with the first and second connection parts, two methods are available. One is a method in which the swelling layer is integrally formed at the same time as the molding of the main body, and the other is a method in which the swelling layer formed in another step is joined by bonding, welding, or the like to be integrated. The integral molding method is more excellent in terms of processability and integral strength. The integral molding method involves integral molding of the main body and the swelling layer.
In this regard, it is effective to form a swelling layer by adding a swelling agent as described above. In other words, by adding a swelling agent, the degree of freedom in selecting a synthetic resin to be used for the swelling layer is increased, and the same synthetic resin as that of the main body can be used for the swelling layer. It will be easier. Such an integral molding method is excellent in physical performance such as hardness and chemical stability, and is particularly effective when the main body is formed of polyethylene resin, which is most suitable as a water barrier sheet but difficult to adhere. is there.
【００１０】[0010]
【実施の形態】本発明の好ましい一実施形態による遮水
シートは、図１に示すように、上下方向に長い長方形状
の本体シート部１の左右各側辺に側辺部２、３を一体的
に接続してなり、その一方の側辺部２には第１の接続部
として接続実４が形成され、また他方の側辺部３には第
２の接続部として接続溝５が形成されている。なお図１
では上下方向の長さを縮めて示してある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a waterproof sheet according to a preferred embodiment of the present invention has lateral sides 2, 3 integrally formed on left and right sides of a rectangular main body sheet 1 which is long in the vertical direction. A connection member 4 is formed on one side portion 2 as a first connection portion, and a connection groove 5 is formed on the other side portion 3 as a second connection portion. ing. FIG. 1
In the figure, the vertical length is reduced.
【００１１】接続実４は、やじり様の断面を持つ形状で
シート部分から膨出するように形成されており、その尖
った先端部に膨潤層４ｉを一体的に備えている。一方、
接続溝５は、接続実４の断面にほぼ対応する断面形状、
より具体的には接続実４を図２中の矢印の如く差し込む
ことが可能で、且つ差し込んだ際に接続実４を包み込む
ことになるような形状に形成されている。そして図３に
示すようにして接続実４が嵌合した状態でその膨潤層４
ｉの先端が位置する部位に膨潤層５ｉを一体的に備えて
いる。これらの膨潤層４ｉ、５ｉは、本体部と同じポリ
エチレン樹脂かこれと相溶性のある合成樹脂に膨潤剤を
混練した樹脂材で形成し、側辺部２、３を押し出し成形
などで成形する際に一体的に成形する。膨潤剤の添加量
は、１０％以上の膨潤率与える程度とする。より好まし
くは１００〜３００％の膨潤率を与える程度とする。The connection member 4 is formed so as to bulge out of the sheet portion in a shape having a crimp-like cross section, and is integrally provided with a swelling layer 4i at its sharp tip. on the other hand,
The connection groove 5 has a cross-sectional shape substantially corresponding to the cross-section of the connection real 4,
More specifically, it is formed in such a shape that the connection member 4 can be inserted as shown by an arrow in FIG. 2 and, when inserted, wraps around the connection member 4. Then, as shown in FIG.
The swelling layer 5i is integrally provided at the position where the tip of i is located. These swelling layers 4i, 5i are formed of the same polyethylene resin as the main body or a resin material obtained by kneading a swelling agent with a synthetic resin compatible with the same, and the side portions 2, 3 are formed by extrusion molding or the like. And molded integrally. The amount of the swelling agent added is such that the swelling ratio is 10% or more. More preferably, the degree of swelling is from 100 to 300%.
【００１２】このような遮水シートは、それぞれの接続
実４と接続溝５を介して図３に示すように接続して用い
る。例えば廃棄物処分場における鉛直遮水構造に用いる
場合であれば、多数の遮水シートを廃棄物処分場の周囲
を一周して囲むように接続して用いる。このような使用
状態にあって、接続実４と接続溝５による接続部に廃棄
物処分場から漏れ出した汚水などが侵入すると、この水
で膨潤層４ｉ、５ｉが膨潤し、これにより接続実４と接
続溝５の密着性が高まって水密性が向上する。この結
果、十分な遮水性を接続部に与えることができる。[0012] Such a water-blocking sheet is used by being connected as shown in FIG. For example, when used for a vertical water-blocking structure in a waste disposal site, a large number of water-impervious sheets are connected and used to surround the waste disposal site. In such a state of use, when sewage or the like leaked from the waste disposal site enters the connection portion between the connection member 4 and the connection groove 5, the swelling layers 4i and 5i swell with the water, and as a result, the connection member The adhesion between the connection groove 4 and the connection groove 5 is increased, and the watertightness is improved. As a result, sufficient water shielding can be provided to the connection portion.
【００１３】[0013]
【発明の効果】以上説明したように本発明によると、接
続部の遮水性を安定なものとすることができ、例えば廃
棄物処分場などについてより安全な鉛直遮水構造が可能
となる。As described above, according to the present invention, it is possible to stabilize the water shielding of the connection part, and it is possible to provide a more secure vertical water shielding structure for a waste disposal site, for example.
【図１】一実施形態による遮水シートの斜視図。FIG. 1 is a perspective view of a water impermeable sheet according to one embodiment.
【図２】遮水シート同士の接続の関係を示す説明図。FIG. 2 is an explanatory diagram showing a connection relationship between water impermeable sheets.
【図３】遮水シート同士の接続の状態を示す説明図。FIG. 3 is an explanatory diagram showing a state of connection between water-impervious sheets.
４ 接続実（第１の接続部） ５ 接続溝（第２の接続部） ４ｉ 膨潤層 ５ｉ 膨潤層 4 Connection Real (First Connection) 5 Connection Groove (Second Connection) 4i Swelling Layer 5i Swelling Layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 上田 滋夫 東京都世田谷区池尻２−33−16太陽工業株 式会社内 (72)発明者 山口 忠重 千葉県八千代市上高野1384−５上高野工業 団地長谷川化学工業株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeo Ueda Within Taiyo Kogyo Co., Ltd. 2-33-16 Ikejiri, Setagaya-ku, Tokyo (72) Inventor Tadashige Yamaguchi 1384-5 Kamedano Industrial Complex, Yachiyo-shi, Chiba Pref. Hasegawa Chemical Industry Co., Ltd.
Claims (3)
とともに、他方の側辺に第２の接続部が設けられてお
り、複数枚をそれぞれにおける第１の接続部と第２の接
続部の係合により接続して用いられ、一定領域を囲むよ
うに地中に立設することで前記領域を遮水的に閉鎖する
のに機能する遮水シートにおいて、前記第１の接続部と
第２の接続部の何れか一方または両方に、吸水で膨潤す
る膨潤層を一体的に設けたことを特徴とする遮水シー
ト。1. A first connection part is provided on one side and a second connection part is provided on the other side, and a plurality of sheets each have a first connection part and a second connection part. A first connection portion, wherein the first connection portion is used in connection with engagement of a connection portion, and is provided to stand underground so as to surround a certain region and function to close the region in a water-impervious manner. A water impermeable sheet, wherein a swelling layer which swells due to water absorption is integrally provided on one or both of the first and second connecting portions.
成した請求項１に記載の遮水シート。2. The impermeable sheet according to claim 1, wherein the swelling layer is formed of a synthetic resin to which a swelling agent is added.
求項１または請求項２に記載の遮水シート。3. The impermeable sheet according to claim 1, wherein the swelling layer is integrated by integral molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18853497A JP3641104B2 (en) | 1997-07-14 | 1997-07-14 | Waterproof sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18853497A JP3641104B2 (en) | 1997-07-14 | 1997-07-14 | Waterproof sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1128438A true JPH1128438A (en) | 1999-02-02 |
| JP3641104B2 JP3641104B2 (en) | 2005-04-20 |
Family
ID=16225394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18853497A Expired - Fee Related JP3641104B2 (en) | 1997-07-14 | 1997-07-14 | Waterproof sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3641104B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033744A (en) * | 2001-07-23 | 2003-02-04 | Taiyo Kogyo Corp | Vertical water barrier sheet, and inspection method for water barrier wall constituted by using the same |
| JP2009001992A (en) * | 2007-06-19 | 2009-01-08 | Ashimori Ind Co Ltd | Impervious device |
-
1997
- 1997-07-14 JP JP18853497A patent/JP3641104B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033744A (en) * | 2001-07-23 | 2003-02-04 | Taiyo Kogyo Corp | Vertical water barrier sheet, and inspection method for water barrier wall constituted by using the same |
| JP2009001992A (en) * | 2007-06-19 | 2009-01-08 | Ashimori Ind Co Ltd | Impervious device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3641104B2 (en) | 2005-04-20 |
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