JPH06240638A - Joint method for impervious sheet and projection - Google Patents
Joint method for impervious sheet and projectionInfo
- Publication number
- JPH06240638A JPH06240638A JP2562393A JP2562393A JPH06240638A JP H06240638 A JPH06240638 A JP H06240638A JP 2562393 A JP2562393 A JP 2562393A JP 2562393 A JP2562393 A JP 2562393A JP H06240638 A JPH06240638 A JP H06240638A
- Authority
- JP
- Japan
- Prior art keywords
- water
- sheet
- inorganic substance
- impervious sheet
- projections
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000126 substance Substances 0.000 claims abstract description 33
- 230000008961 swelling Effects 0.000 claims abstract description 15
- 238000005304 joining Methods 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 abstract description 7
- 239000000440 bentonite Substances 0.000 abstract description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 239000004576 sand Substances 0.000 abstract description 3
- 239000011435 rock Substances 0.000 abstract 3
- 238000000926 separation method Methods 0.000 abstract 1
- 239000011359 shock absorbing material Substances 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 12
- 230000001070 adhesive effect Effects 0.000 description 12
- 230000013011 mating Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000004745 nonwoven fabric Substances 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 235000006506 Brasenia schreberi Nutrition 0.000 description 2
- 244000267222 Brasenia schreberi Species 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004113 Sepiolite Substances 0.000 description 2
- 229960000892 attapulgite Drugs 0.000 description 2
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 2
- VNSBYDPZHCQWNB-UHFFFAOYSA-N calcium;aluminum;dioxido(oxo)silane;sodium;hydrate Chemical compound O.[Na].[Al].[Ca+2].[O-][Si]([O-])=O VNSBYDPZHCQWNB-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910000271 hectorite Inorganic materials 0.000 description 2
- KWLMIXQRALPRBC-UHFFFAOYSA-L hectorite Chemical compound [Li+].[OH-].[OH-].[Na+].[Mg+2].O1[Si]2([O-])O[Si]1([O-])O[Si]([O-])(O1)O[Si]1([O-])O2 KWLMIXQRALPRBC-UHFFFAOYSA-L 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052901 montmorillonite Inorganic materials 0.000 description 2
- 229910052625 palygorskite Inorganic materials 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229910000275 saponite Inorganic materials 0.000 description 2
- 229910052624 sepiolite Inorganic materials 0.000 description 2
- 235000019355 sepiolite Nutrition 0.000 description 2
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 2
- 230000002522 swelling effect Effects 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 241000239290 Araneae Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000000887 hydrating effect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920001289 polyvinyl ether Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Revetment (AREA)
- Laminated Bodies (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水路のライニングや池
の内張り等、主として土木構造物の遮水の為に用いられ
る遮水シートを敷設する際の、パイプ等の突出物取り合
い部における、遮水シートと突出物との接合方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projecting portion for a pipe or the like when laying a water-blocking sheet mainly used for water-blocking a civil structure such as a lining of a waterway or a lining of a pond. The present invention relates to a method of joining a waterproof sheet and a protrusion.
【０００２】[0002]
【従来の技術】人工の水路や池等の斜面部や底部には通
常、流入口や排水口として各種のパイプが突き出してい
るため、ライニングや内張りとして遮水シートを敷設す
る際、パイプの突き出し部ではでは該遮水シートにパイ
プを通すための貫通孔をあけている。そして該貫通孔に
パイプを通して遮水シートを敷設した後、取り合い部か
らの漏水を防ぐため遮水シートとパイプを接合しなけれ
ばならない。2. Description of the Related Art Generally, various pipes are projected at the slopes and bottoms of artificial waterways and ponds as inflow ports and drainage ports. In the section, a through hole for allowing a pipe to pass through is provided in the impermeable sheet. After laying a water blocking sheet through the pipe in the through hole, the water blocking sheet and the pipe must be joined in order to prevent water leakage from the mating portion.
【０００３】従来の遮水シートは、合成ゴムや合成樹脂
など、主として高分子系材料を用いたシートであり、こ
れらの高分子系材料を用いた遮水シートとパイプとの接
合方法としては、現場にてフランジをパイプに通し、パ
イプとフランジ、およびフランジと遮水シートを接着剤
で接着する方法が主に採用されている。一方、漏水防止
のための遮水シートとして、吸水膨潤性無機物質の粒状
体を透水性のシート間に接着固定した遮水シートが実開
昭６１−１３３３２７号公報で知られており、この遮水
シートをパイプと接合する方法は示されていないが、図
４に示す様な内面に吸水膨潤性無機物質１を付着した透
水性シート２にノレン状の切れ込みを５〜８本入れたノ
レン状シートを用意し、該ノレン状シートの吸水膨潤性
無機物質付着面が遮水シートとパイプに接し、かつ切れ
込み部が遮水シートと接するようにしてパイプにまきつ
ける方法が公知の技術である。The conventional water-blocking sheet is a sheet mainly made of a polymer material such as synthetic rubber or synthetic resin. As a method of joining a water-blocking sheet and a pipe using these polymer materials, The method of passing the flange through the pipe at the site and adhering the pipe and the flange, and the flange and the waterproof sheet with an adhesive is mainly adopted. On the other hand, as a water-blocking sheet for preventing water leakage, a water-blocking sheet in which particles of a water-swelling inorganic substance are bonded and fixed between water-permeable sheets is known in Japanese Utility Model Publication No. 61-133327. Although a method of joining the water sheet to the pipe is not shown, the water-permeable sheet 2 having the water-swelling inorganic substance 1 attached to its inner surface as shown in FIG. A known method is to prepare a sheet and wind it on the pipe so that the water absorbing and swelling inorganic substance-adhered surface of the sheet is in contact with the water impervious sheet and the cut portion is in contact with the impermeable sheet.
【０００４】[0004]
【発明が解決しようとする課題】しかし、高分子系材料
を用いる遮水シートは、シートおよびパイプ表面の前処
理（水分、ゴミ等の除去）や接着剤の塗布作業等に手間
がかかり、しかも接着不良等の欠陥が生じやすいという
欠点があった。また、施工後にパイプ周囲の地盤の不等
沈下等により遮水シートに引っ張り力が作用したり、パ
イプ軸に対し垂直力が作用した場合には、接合面がはが
れたり接合部付近の遮水シートに亀裂を生じたりして漏
水するおそれがあった。However, the water-blocking sheet using a polymeric material requires time and labor for pretreatment (removal of water, dust, etc.) on the surface of the sheet and the pipe, application of an adhesive, and the like. There is a defect that defects such as poor adhesion are likely to occur. In addition, if tensile force acts on the impermeable sheet due to uneven settlement of the ground around the pipe after construction, or if a vertical force acts on the pipe axis, the joint surface may peel off or the impermeable sheet near the joint part. There was a risk of water leakage due to cracks.
【０００５】一方、吸水膨潤性無機物質を用いた遮水シ
ートは、前処理や接着剤の塗布作業等の手間は不要であ
るものの、上記と同様の理由で接合面がはがれたり接合
部付近の遮水シートに亀裂を生じたりして漏水するおそ
れがあった。本発明の目的は、以上の欠点を克服し遮水
シートとパイプとの取り合い部における接合方法に関
し、施工が容易であり、かつ接合面の遮水性能を保持す
る接合方法を提供することである。On the other hand, the water-impermeable sheet using the water-swellable inorganic substance does not require pretreatment or application of an adhesive, but for the same reason as described above, the joint surface is peeled off or the vicinity of the joint is removed. There was a risk of water leakage due to cracks in the waterproof sheet. An object of the present invention is to provide a joining method that overcomes the above-mentioned drawbacks, relates to a joining method in a joint portion of a water impervious sheet and a pipe, is easy to construct, and maintains the water impermeability of a joint surface. .
【０００６】[0006]
【課題を解決するための手段】本発明は、透水性シート
間に吸水膨潤性無機物質が存在する遮水シートを、突出
物を有する基盤に、該突出物を前記遮水シート間に貫通
させて敷設する方法において、該遮水シートと該突出物
との接する取り合い部のうち、基盤中の取り合い部に吸
水膨潤性無機物質を介在させることを特徴とする遮水シ
ートと突出物の接合方法である。According to the present invention, a water-impermeable sheet having a water-swellable inorganic substance between water-permeable sheets is provided on a substrate having protrusions, and the protrusions are penetrated between the water-impermeable sheets. In the method of laying the water-impervious sheet and the protrusion, a method of joining the water-impervious sheet and the protrusion, wherein a water-swelling inorganic substance is interposed in the mating portion in the base of the mating portion contacting the water-impermeable sheet and the protrusion. Is.
【０００７】本発明の遮水シートと突出物の接合方法を
図を用いて説明する。図１は本発明の接合方法を示した
ものである。基盤６の上に、遮水シート３は突出物５を
貫通する様に敷設され、該シート３と突出物５の接する
取り合い部のうち、基盤中の取り合い部には、吸水膨潤
性無機物質１が存在している。ここで、取り合い部と
は、土質層部等の基盤から突き出る突出物を貫通させて
遮水シートを敷設する場合において、遮水シートと突出
物が接する部分のことをいう。A method of joining the water-impervious sheet and the protrusion of the present invention will be described with reference to the drawings. FIG. 1 shows the joining method of the present invention. The water-impervious sheet 3 is laid on the base 6 so as to penetrate the protrusions 5. Of the joints where the sheet 3 and the protrusions 5 are in contact with each other, the water-swelling inorganic substance 1 is attached to the joint in the base. Exists. Here, the mating portion refers to a portion where the water-impervious sheet and the protrusion contact each other when the water-impervious sheet is laid by penetrating the protrusion such as the soil layer portion.
【０００８】ここでいう突出物５は、パイプや排水口
等、基盤から突出しており、遮水シートを敷設する場合
貫通させる必要のあるものを言う。本発明においては、
該シート３と突出物５の取り合い部のうち、基盤中の取
り合い部を適宜掘削し、該部分にに吸水膨潤性無機物質
を介在させることが必要である。介在させる量は多い程
遮水効果が大きくなるため、基盤を掘削除去する部分の
深さａ及び突出物周囲からの水平距離ｂは少なくとも突
出物の直径ｄ以上とするのが好ましい。The protrusion 5 referred to here is a pipe, drainage port, or the like that protrudes from the base and must be penetrated when a water-blocking sheet is laid. In the present invention,
It is necessary to appropriately excavate the mating part in the substrate among the mating parts of the sheet 3 and the protrusions 5, and to interpose the water-swelling inorganic substance in the part. Since the greater the amount of interposition, the greater the water blocking effect, it is preferable that the depth a of the portion where the base is excavated and removed and the horizontal distance b from the periphery of the protrusion be at least the diameter d of the protrusion.
【０００９】以下に遮水シートと突出物との接合方法を
述べる。人工の水路や池等の斜面部や底部から突き出し
ている各種の突出物を貫通させて遮水シートと突出物を
接合する場合には、まず図１に示す様に基盤６中の取り
合い部の一部を掘削除去して吸水膨潤性無機物質１を充
填する。次に突出物の断面形状の穴が切りかかれた遮水
シート３を貫通させることにより敷設すれば、遮水シー
ト３と突出物４が接合される。A method of joining the water-blocking sheet and the protrusion will be described below. When joining the impermeable sheet and the protrusions by penetrating various protrusions protruding from the slopes and bottoms of artificial waterways and ponds, first, as shown in FIG. A part is excavated and removed, and the water-swellable inorganic substance 1 is filled. Next, the water-blocking sheet 3 and the protrusions 4 are joined by laying the water-blocking sheet 3 through which a hole having a cross-sectional shape of the protrusion is cut out.
【００１０】前記取り合い部に充填する吸水膨潤性無機
物質１は、以下に述べる遮水シート３を構成する物質と
同様のもので良く、水の存在下で吸水し、水和膨潤しう
るものであれば何でもよい。例えばベントナイト、モン
モリロンナイト、ヘクトライト、サポナイト、バイデラ
イト、アタパルジャイト、セピオライト等の粘土鉱物が
あげられるが、水和膨潤性に優れ遮水性が高い点でベン
トナイトが好ましい。The water-swellable inorganic substance 1 to be filled in the above-mentioned connecting portion may be the same as the substance constituting the water-proof sheet 3 described below, which is capable of absorbing water in the presence of water and hydrating and swelling. Anything is fine. Examples thereof include clay minerals such as bentonite, montmorillonite, hectorite, saponite, beidellite, attapulgite, and sepiolite, but bentonite is preferable because it has excellent hydration swelling properties and high water impermeability.
【００１１】さらに図３に示すように、以下に述べる様
な透水性シート（または上面に吸水膨潤性無機物質を付
着させた透水性シート）２を敷設してから吸水膨潤性無
機物質１を充填すれば、吸水膨潤性無機物質の逸散が防
止され、遮水効果は高まる。また、穴を切り欠いた遮水
シート３を用いた上に、さらに図４に示す様な内面に吸
水膨潤性無機物質１を付着した透水性シート２にノレン
状の切れ込みを５〜８本入れたノレン状シート７を用意
し、図５に示すように該ノレン状シートの吸水膨潤性無
機物質付着面が遮水シート３と突出物４に接し、かつ切
れ込み部が遮水シートと接するようにして突出物４にま
きつけ、針金８などで固定しても良い。Further, as shown in FIG. 3, a water-permeable sheet (or a water-permeable sheet having a water-swellable inorganic substance adhered to the upper surface) 2 as described below is laid and then the water-swellable inorganic substance 1 is filled. This prevents the water-swelling inorganic substance from escaping and enhances the water-blocking effect. In addition to the water-impervious sheet 3 with the holes cut out, 5 to 8 Noren-like cuts are made in the water-permeable sheet 2 having the water-swelling inorganic substance 1 attached to the inner surface as shown in FIG. Prepared a Noren-shaped sheet 7 so that the water-swellable inorganic substance-adhered surface of the Noren-shaped sheet contacts the water-blocking sheet 3 and the protrusion 4, and the cut portion contacts the water-blocking sheet. It may be sprinkled on the protrusion 4 and fixed with a wire 8 or the like.
【００１２】本発明に用いる遮水シート３としては例え
ば以下の様な物を用いることができる。図２は遮水シー
ト３の例であり、透水性シート２の間に吸水膨潤性無機
物質１が存在する構造となっている。透水性シート２
は、上面から下面へ水を透す性質があるので本発明に使
用される。この透水性シート２としては、水を吸水膨潤
性無機物質１に供給できる材質のものであれば何でもよ
く、例えば天然繊維、再生繊維、無機繊維やナイロン、
ポリエステル、ポリプロピレン等の合成繊維等の織物・
編み物・不織布等のシート状物や紙等があげられるが、
柔軟性があるものだとより好ましい。As the water-blocking sheet 3 used in the present invention, the following materials can be used, for example. FIG. 2 shows an example of the water-permeable sheet 3, which has a structure in which the water-swellable inorganic substance 1 exists between the water-permeable sheets 2. Water-permeable sheet 2
Is used in the present invention because it has the property of allowing water to pass from the upper surface to the lower surface. The water permeable sheet 2 may be made of any material as long as it can supply water to the water absorbing and swelling inorganic substance 1, such as natural fiber, recycled fiber, inorganic fiber or nylon.
Fabrics such as synthetic fibers such as polyester and polypropylene
Examples include sheet materials such as knitting and non-woven fabrics, and paper.
It is more preferable that it is flexible.
【００１３】遮水シートに用いる吸水膨潤性無機物質１
としては、水の存在下で吸水し、水和膨潤しうるもので
あれば何でもよく、上述の取り合い部に充填されるベン
トナイト、モンモリロンナイト、ヘクトライト、サポナ
イト、バイデライト、アタパルジャイト、セピオライト
等の粘土鉱物があげられるが、水和膨潤性に優れ遮水性
が高い点でベントナイトが好ましい。これらの吸水膨潤
性無機物質は粒状として用いることが好ましく、粉砕し
たものでも、造粒加工した粒状物でも使用できる。吸水
膨潤性無機物質の粒径は、遮水シートの柔軟性を高くす
るために、０．５〜５．０ｍｍであることが好ましい。Water absorbing and swelling inorganic substance 1 for use in the water shield sheet
As, as long as it is capable of absorbing water in the presence of water and swelling by hydration, any of the above-mentioned bentonite, montmorillonite, hectorite, saponite, beidellite, attapulgite, clay such as sepiolite, which is filled in the interface, can be used. Minerals can be used, but bentonite is preferred because it has excellent hydration swelling properties and high water impermeability. These water absorbing and swelling inorganic substances are preferably used in the form of granules, and may be pulverized or granulated granules. The particle diameter of the water-swellable inorganic substance is preferably 0.5 to 5.0 mm in order to increase the flexibility of the water-impermeable sheet.
【００１４】透水性シート間に吸水膨潤性無機物質を保
持する手段としてはとくに限定しないが、たとえば接着
剤を用いる方法やニードルパンチによる方法が挙げられ
る。接着剤を用いる場合には粘着力があって柔軟性に富
み、しかも吸水膨潤性無機物質の吸水膨潤を妨げず、ホ
ットメルト性を有するものが特に好ましい。例えば、ス
チレン−ブタジエン−スチレン（ＳＢＳ）等のスチレン
系ブロックコポリマー、クロプレンゴム、ポリビニルエ
ーテル、ポリビニルアルコール、ポリイソブチレン、Ｓ
ＢＲ、ブチルゴム、ポリウレタン、アクリルエマルジョ
ン、ニトリルゴム系接着剤などがあげられる。The means for holding the water-swellable inorganic substance between the water-permeable sheets is not particularly limited, but examples thereof include a method using an adhesive and a method using needle punching. In the case of using an adhesive, it is particularly preferable that the adhesive has adhesiveness and is rich in flexibility, does not interfere with water swelling and swelling of the water absorbing and swelling inorganic substance, and has a hot melt property. For example, styrene-based block copolymers such as styrene-butadiene-styrene (SBS), chloroprene rubber, polyvinyl ether, polyvinyl alcohol, polyisobutylene, S
Examples thereof include BR, butyl rubber, polyurethane, acrylic emulsion, nitrile rubber adhesive and the like.
【００１５】以下、遮水シートを製造する方法を述べ
る。例えば前記のポリエステル、ポリプロピレン系重合
体等の合成繊維からなる不織布あるいは織編物などの透
水性シートを準備し、この上に例えば、前記したスチレ
ン系ホットメルト型接着剤を高温の状態にして、軟化さ
せて繊維状でスプレー塗布する。この接着剤が付着され
ている透水性シート上に直ちに前記の吸水膨潤性無機物
質を投入し、所定量接着させる。吸水膨潤性無機物質の
付着は、図２の様に均一層としてもよいし、無作為に投
入した状態としても良い。また、吸水膨潤性無機物質の
層の厚みは、遮水シートの遮水性を高くするために、乾
燥状態で３〜２０ｍｍであることが好ましい。さらにそ
の上から再度前記の接着剤を同一方法で塗布する。この
操作を数回繰り返し行い、前記の吸水膨潤性無機物質粒
の複数層を接着して形成させる。The method for producing the water-blocking sheet will be described below. For example, a water-permeable sheet such as a non-woven fabric or a woven or knitted fabric made of synthetic fibers such as the polyester or polypropylene-based polymer is prepared, and the styrene-based hot-melt adhesive described above is softened by heating the sheet. And spray-apply in fibrous form. The water absorbing and swelling inorganic substance is immediately put on the water permeable sheet to which the adhesive is attached, and a predetermined amount is adhered. The water-swellable inorganic substance may be adhered as a uniform layer as shown in FIG. 2 or may be randomly placed. Further, the thickness of the layer of the water-swellable inorganic substance is preferably 3 to 20 mm in the dry state in order to increase the water impermeability of the impermeable sheet. Further, the above-mentioned adhesive is applied again from above by the same method. This operation is repeated several times to bond and form a plurality of layers of the water-swellable inorganic substance particles.
【００１６】[0016]
【作用】以上の構成にすることにより、施工後も突出物
周囲の地盤の不等沈下等により遮水シートに引っ張り力
が作用したり、突出物軸に対し垂直力が作用した場合で
も、基盤中の取り合い部の充填した吸水膨潤性無機物質
には追随性があり緩衝材の働きをするため、接合面がは
がれたり接合部付近の遮水シートに亀裂を生じたりする
ことがなく、突出物周囲の遮水性が確保される。[Operation] With the above configuration, even after the construction, even if a tensile force acts on the impermeable sheet due to uneven settlement of the ground around the protrusion or a vertical force acts on the protrusion axis, the foundation The water absorbing and swelling inorganic substance filled in the inside joint part has a conforming property and acts as a cushioning material, so that the joint surface does not peel off or the water impermeable sheet near the joint part does not crack, and the protrusions The surrounding water shield is secured.
【００１７】[0017]
【実施例】以下、実施例に基づき、本発明の説明をす
る。 《遮水シートの作製》 作業１：引張張力３０ｋｇｆ／５ｃｍ巾（ＪＩＳ Ｌ−
１０９６法測定、タテ）を有する透水性のポリエステル
不織布（旭化成工業株式会社製、目付量５０ｇ／ｍ2 ）
の上に、ポリスチレン系のエラストマーにロジンを粘着
付与剤として、またプロセスオイルを軟化剤として配合
したホットメルト接着剤を予め１２５℃で軟化させた状
態でくもの糸状でスプレー塗布した（ノズル口径１．２
ｍｍφ使用）。EXAMPLES The present invention will be described below based on examples. << Preparation of water impermeable sheet >> Work 1: Tensile tension 30 kgf / 5 cm width (JIS L-
Water-permeable polyester non-woven fabric having 1096 measurement (vertical) (manufactured by Asahi Kasei Kogyo Co., Ltd., basis weight 50 g / m 2 ).
A hot melt adhesive prepared by blending polystyrene elastomer with rosin as a tackifier and process oil as a softening agent was spray-applied in the form of spider thread in a state of being softened in advance at 125 ° C (nozzle diameter 1 .2
mmφ used).
【００１８】作業２：ただちに粒径２．５ｍｍ、長さ３
〜５ｍｍのベントナイト造粒品を投入し、所定量付着さ
せた。 作業３：付着したベントナイト粒子上に再度該接着剤を
スプレー塗布した。 作業４：作業２、３をさらに１回ずつ繰り返した後、前
記の透水性のポリエステル不織布を重ね、加圧ロールを
通して一体化させ、厚さ６ｍｍの図２に示す遮水シート
を得た。Work 2: Immediately grain size 2.5 mm, length 3
A bentonite granulated product having a size of ˜5 mm was put in and adhered in a predetermined amount. Work 3: The adhesive was again spray-coated on the attached bentonite particles. Work 4: After repeating works 2 and 3 once more, the water-permeable polyester nonwoven fabrics were stacked and integrated by passing through a pressure roll to obtain a water-impervious sheet having a thickness of 6 mm shown in FIG.
【００１９】《遮水性能試験》ＪＩＳＡ１２１８に準拠
し、内径５００ｍｍ、深さ３００ｍｍの円筒形圧力濾過
モールド内に、深さ１００ｍｍにわたって砂を敷いて締
め固めて土質層とし、該土質層中央部にパイプに見立て
た直径１００ｍｍの塩化ビニル製円柱と接合した。さら
に砂により７０ｍｍ厚の覆土を施した後モールド内に注
水し、２４時間静水圧で放置した後、１５分間隔で０．
５ｋｇｆ／ｃｍ2 ずつ昇圧した。なお、いずれの実験も
同一条件で３例ずつ行った。<< Water-impervious performance test >> According to JISA1218, sand is spread over a depth of 100 mm and compacted in a cylindrical pressure filtration mold having an inner diameter of 500 mm and a depth of 300 mm to form a soil layer. The pipe was joined to a vinyl chloride column having a diameter of 100 mm. Furthermore, after covering the soil with a thickness of 70 mm with sand, water was poured into the mold and allowed to stand for 24 hours under hydrostatic pressure.
The pressure was increased by 5 kgf / cm 2 . In addition, all the experiments were performed under the same conditions, three cases each.
【００２０】[0020]
【実施例１】図１にしめすように、突出物４である塩化
ビニル製円柱を有する基盤に上記遮水シートを敷設し
た。まず基盤中の取り合い部の土質層を、深さａ＝１０
０ｍｍ、円柱から水平距離ｂ＝１００ｍｍまでの部分を
掘削除去し、吸水膨潤性無機物質１を２．５ｋｇ充填し
た。次に、遮水シート３の中央部に直径１００ｍｍの穴
を開け、前期円柱を貫通させて該遮水シートを敷設し
た。遮水性能試験をおこなったところ、同一条件の供試
体３例は、すべて１０．０ｋｇｆ／ｃｍ2 に至っても漏
水は認められなかった。Example 1 As shown in FIG. 1, the water-impermeable sheet was laid on a base having a vinyl chloride columnar body which was a protrusion 4. First, the soil layer of the mating part in the base, depth a = 10
A portion of 0 mm from the cylinder to a horizontal distance b = 100 mm was excavated and removed, and 2.5 kg of the water-swellable inorganic substance 1 was filled. Next, a hole having a diameter of 100 mm was made in the central portion of the water-impervious sheet 3, and the water-impermeable sheet was laid by penetrating the cylinder in the previous period. As a result of a water-impervious performance test, no water leakage was observed in all three specimens under the same conditions, even when the test specimen reached 10.0 kgf / cm 2 .
【００２１】[0021]
【比較例１】図６に示すように、突出物である塩化ビニ
ル製円柱４を有する基盤に上記遮水シートを敷設した。
ここでは基盤中の取り合い部の土質層は掘削除去せず、
遮水シート３の中央部に直径１００ｍｍの穴を開け、塩
化ビニル製円柱を貫通させて該遮水シートを敷設した。
次に２００ｍｍ×３５０ｍｍの透水性ポリエステル不織
布（目付量５０ｇ／ｍ2 ）に、前記の遮水シート作製と
同様の方法で付着させ、図４に示すようにノレン状の切
れ込みを６本入れることによってノレン状シートを作製
し、該ノレン状シートの吸水膨潤性無機物質付着面が遮
水シートとパイプに接し、かつ切れ込み部が遮水シート
と接するようにしてパイプにまきつけ、直径０．５ｍｍ
の針金で二重に巻いて固定した。遮水性能試験を行った
ところ、同一条件の供試体３例は、それぞれ０．５、
１．０、２．０ｋｇｆ／ｃｍ2 で漏水（約１０ｃｃ／ｍ
ｉｎ）を生じ、実施例のような高い遮水性は得られなか
った。[Comparative Example 1] As shown in FIG. 6, the water-impermeable sheet was laid on a base having a vinyl chloride column 4 as a protrusion.
Here, the soil layer of the mating part in the base is not excavated and removed,
A hole having a diameter of 100 mm was opened in the central portion of the water-impervious sheet 3, and a vinyl chloride column was penetrated to lay the water-impermeable sheet.
Next, by adhering to a 200 mm × 350 mm water-permeable polyester non-woven fabric (weight per unit area: 50 g / m 2 ) in the same manner as in the production of the above-mentioned water-blocking sheet, by making 6 notren-shaped cuts as shown in FIG. A noren-shaped sheet was prepared, and the noren-shaped sheet was wound on the pipe so that the water-absorption-swelling inorganic substance-adhering surface was in contact with the water-blocking sheet and the pipe, and the cut portion was in contact with the water-blocking sheet, and the diameter was 0.5 mm.
The wire was double wound and fixed. A water-impervious performance test showed that three specimens under the same conditions were 0.5,
Water leakage at about 1.0 and 2.0 kgf / cm 2 (about 10 cc / m
in), and high water impermeability as in the example was not obtained.
【００２２】[0022]
【発明の効果】遮水シートと突出物との接合部に接着財
を用いないため、前処理や接着剤の塗布作業等の手間が
不要であり施工が容易となる。また施工後に突出物周囲
の地盤の不等沈下等により遮水シートに引っ張り力が作
用したり、突出物軸に対し垂直力が作用した場合でも、
接合面がはがれたり接合付近の遮水シートに亀裂を生じ
たりすることがなく、高い遮水性能を得ることができ
る。EFFECTS OF THE INVENTION Since no adhesive material is used at the joint between the water-blocking sheet and the protrusions, there is no need for pretreatment, application of adhesive, etc., and the construction is easy. In addition, even if a tensile force acts on the impermeable sheet due to uneven subsidence of the ground around the protrusion after the construction, or if a vertical force acts on the protrusion axis,
High water impermeability can be obtained without peeling the joint surface or cracks in the impermeable sheet near the joint.
【図１】本発明による遮水シートと突出物との接合部を
しめす断面図FIG. 1 is a cross-sectional view showing a joint between a waterproof sheet according to the present invention and a protrusion.
【図２】遮水シートの構成を示す斜視図FIG. 2 is a perspective view showing the structure of a water-blocking sheet.
【図３】本発明による、遮水シートと突出物との接合部
の他の実施例を示す断面図FIG. 3 is a cross-sectional view showing another embodiment of the joint between the water-blocking sheet and the protrusion according to the present invention.
【図４】ノレン状シートを示す斜視図FIG. 4 is a perspective view showing a Noren sheet.
【図５】本発明による、遮水シートと突出物との接合部
の他の実施例を示す断面図FIG. 5 is a cross-sectional view showing another embodiment of the joint between the water-blocking sheet and the protrusion according to the present invention.
【図６】比較例による、遮水シートとパイプとの接合部
の他の実施例を示す断面図FIG. 6 is a cross-sectional view showing another embodiment of a joint between a water-blocking sheet and a pipe according to a comparative example.
１．吸水膨潤性無機物質 ２．透水性シート ３．遮水シート ４．突出物（パイプ） ５．パイプ ６．基盤 ７．ノレン状シート ８．針金 1. Water-swellable inorganic substance 2. Water-permeable sheet 3. Impermeable sheet 4. Projection (pipe) 5. Pipe 6. Foundation 7. Noren sheet 8. wire
Claims (1)
存在する遮水シートを、突出物を有する基盤に、該突出
物を前記遮水シート間に貫通させて敷設する方法におい
て、該遮水シートと該突出物との接する取り合い部のう
ち、基盤中の取り合い部に吸水膨潤性無機物質を介在さ
せることを特徴とする遮水シートと突出物の接合方法1. A method of laying a water-impermeable sheet having a water-swellable inorganic substance between water-permeable sheets on a substrate having protrusions, wherein the protrusions penetrate between the water-impermeable sheets. A method of joining a water-impervious sheet and a protrusion, wherein a water-swelling swelling inorganic substance is interposed between the water sheet and the protruding portion in contact with the protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2562393A JPH06240638A (en) | 1993-02-15 | 1993-02-15 | Joint method for impervious sheet and projection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2562393A JPH06240638A (en) | 1993-02-15 | 1993-02-15 | Joint method for impervious sheet and projection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06240638A true JPH06240638A (en) | 1994-08-30 |
Family
ID=12171009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2562393A Withdrawn JPH06240638A (en) | 1993-02-15 | 1993-02-15 | Joint method for impervious sheet and projection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06240638A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010227765A (en) * | 2009-03-26 | 2010-10-14 | Osaka Prefecture | Reservoir and its formation method |
-
1993
- 1993-02-15 JP JP2562393A patent/JPH06240638A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010227765A (en) * | 2009-03-26 | 2010-10-14 | Osaka Prefecture | Reservoir and its formation method |
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|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
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