JPS63171999A - Composite waterproof sheet - Google Patents
Composite waterproof sheetInfo
- Publication number
- JPS63171999A JPS63171999A JP62234178A JP23417887A JPS63171999A JP S63171999 A JPS63171999 A JP S63171999A JP 62234178 A JP62234178 A JP 62234178A JP 23417887 A JP23417887 A JP 23417887A JP S63171999 A JPS63171999 A JP S63171999A
- Authority
- JP
- Japan
- Prior art keywords
- water
- sheet
- waterproof sheet
- lining concrete
- heat
- 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
- 239000002131 composite material Substances 0.000 title description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 6
- 239000004745 nonwoven fabric Substances 0.000 description 16
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012466 permeate Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はトンネルの一次覆工コンクリートと二次覆工コ
ンクリートとの間に配設され、一次覆工コンクリート側
からの湧水が二次覆工コンクリート側に浸出するのを防
止する複合防水シートに関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is provided between a primary lining concrete and a secondary lining concrete of a tunnel, and spring water from the primary lining concrete side flows into the secondary lining concrete. This invention relates to a composite waterproof sheet that prevents leakage into concrete.
従来、トンネル覆工部においては、第４図に示すように
、地山ａ側に一次覆工コンクリートｂを打設すると共に
、この−次層エコンクリートｂに防水シートＣをボルト
、コンクリート釘等により打ちつけ固定し、更にこの防
水シートＣに二次覆工コンクリートｄを打設することが
行なわれており、防水シートＣを一次及び二次層エコン
クリートｂ、ｄ間に介装して湧水を一次覆工コンクリー
トｂと防水シートＣとの間を流下させて排水することに
より、一次覆工コンクリートｂ側からの湧水が二次層エ
コンクリートｄ側に浸出することを防止している。Conventionally, in the tunnel lining section, as shown in Fig. 4, a primary lining concrete b is cast on the ground a side, and a waterproof sheet C is attached to this second layer of concrete b by bolts, concrete nails, etc. A secondary lining concrete d is placed on this waterproof sheet C, and the waterproof sheet C is interposed between the primary and secondary concrete layers b and d to prevent spring water. By draining water by flowing down between the primary lining concrete b and the waterproof sheet C, spring water from the primary lining concrete b side is prevented from seeping into the secondary lining concrete d side.
そして、前記−法覆工コンクリート側からの湧水が一次
覆工コンクリートｂと防水シートＣとの間を流下し易く
するため、従来はシート自体に凹凸を付して水路を形成
した防水シート、或いは合成樹脂基材の片面全面に通水
性、保水性を有する不織布を積層貼着した防水シートが
用い゛られたり、又は予め不織布を一次覆工コンクリー
トに固定してその上にシート状の防水シートを更に重ね
て固定する方式の防水シートが用いられている。In order to make it easier for spring water from the above-mentioned method lining concrete side to flow down between the primary lining concrete b and the waterproof sheet C, conventionally a waterproof sheet is provided with unevenness on the sheet itself to form water channels; Alternatively, a waterproof sheet is used in which a nonwoven fabric with water permeability and water retention properties is laminated and adhered to the entire surface of one side of a synthetic resin base material, or a nonwoven fabric is fixed in advance to the primary lining concrete and a sheet-shaped waterproof sheet is placed on top of the nonwoven fabric. A waterproof sheet is used that is further layered and fixed.
しかしながら、これらのシートは完全防水性を得るため
に、施工工事が繁雑になり、また−次層エコンクリート
からの湧水の通水量を確保するのに難点があった。However, in order to obtain complete waterproofness, these sheets required complicated construction work, and there were also difficulties in ensuring the flow of spring water from the next layer of concrete.
また、防水シートは上述したように覆工コンクリートに
ボルト、コンクリート釘等により打ちつけ固定するもの
であるが、この場合、第５図に示したように、釘等の固
定部材ｅを打ち込んで防水シートＣを一次覆工コンクリ
ートｂに固定した場合において、その固定部材ｅの周壁
を伝って地山側の湧水が二次覆工コンクリート側に漏出
する問題があり、この点の解決が求められていた。In addition, as mentioned above, the waterproof sheet is fixed to the concrete lining with bolts, concrete nails, etc. In this case, as shown in Figure 5, fixing members e such as nails are driven in to secure the waterproof sheet. When C is fixed to the primary lining concrete b, there is a problem that spring water from the ground side leaks through the peripheral wall of the fixing member e to the secondary lining concrete side, and a solution to this problem has been sought. .
本発明は上記事情に鑑みなされたもので、十分な通水量
を確保することができると共に、釘等の固定部材の打込
み箇所における漏水が確実に防止された防水シートを提
供することを目的とする。The present invention has been made in view of the above circumstances, and an object thereof is to provide a waterproof sheet that can secure a sufficient amount of water flow and that can reliably prevent water leakage at locations where fixing members such as nails are driven. .
本発明は上記目的を達成するため、トンネルの一次覆工
コンクリートと二次覆工コンクリートとの間に配設され
、−法覆工コンクリート側からの湧水が二次覆工コンク
リート側に浸出するのを防止する防水シートにおいて、
不透水性基材シート主体の一面に透水性シートを部分的
に複数箇所で接着すると共に、不透水性基材シートの他
面上に釘等の固定部材の打込み箇所に対応して熱融着性
物質層を形成したものである。In order to achieve the above object, the present invention is installed between the primary lining concrete and the secondary lining concrete of a tunnel, and - spring water from the lining concrete side seeps into the secondary lining concrete side. In a waterproof sheet that prevents
At the same time, the water-permeable sheet is partially adhered to one side of the main body of the water-impermeable base sheet at multiple locations, and the other side of the water-impermeable base sheet is heat-sealed at locations where fixing members such as nails will be driven. This layer is made up of a layer of sexual material.
この場合、前記熱融着物質層は透水性シートと不透水性
基材シートとの接着箇所に設けることが好適であり、ま
た熱融着性物質は枠体内に充填し、この枠体を不透水性
基材シートの他面に固着するようにすることが好適であ
る。In this case, it is preferable that the heat-fusible material layer is provided at the bonding location between the water-permeable sheet and the water-impermeable base sheet, and the heat-fusible material is filled into the frame so that the frame is It is preferable to fix it to the other surface of the water-permeable base sheet.
ここで、前記不透水性基材シートとしては、プラスチッ
クシート、ゴムシート及び金属箔に前記シート等を積層
した複合シート等が使用できるが、特にポリエチレンシ
ートやエチレン−酢酸ビニル共重合物シート等が好まし
い。また、前記熱融着性物質としては、エチレン−酢酸
ビニル共重合物等を主原料とするホットメルト接着剤、
生ゴム、合成ゴム等が好適に使用される。Here, as the water-impermeable base sheet, a plastic sheet, a rubber sheet, a composite sheet in which the above sheets are laminated on metal foil, etc. can be used, but in particular, a polyethylene sheet, an ethylene-vinyl acetate copolymer sheet, etc. are used. preferable. In addition, the heat-fusible substance includes a hot-melt adhesive whose main raw material is an ethylene-vinyl acetate copolymer, etc.
Raw rubber, synthetic rubber, etc. are preferably used.
また、透水性シートとしてはポリエチレン、ポリプロピ
レン、ポリエステル、ナイロン等の合成樹脂製の不織布
やポリ塩化ビニル、ポリウレタン等の連続気泡発泡体か
らなるシート等が使用できる。Further, as the water-permeable sheet, a nonwoven fabric made of synthetic resin such as polyethylene, polypropylene, polyester, or nylon, or a sheet made of open-cell foam such as polyvinyl chloride or polyurethane can be used.
本発明の防水シートは、透水性シート面を一次覆工コン
クリート側に向けて配設し、ボルト、コンクリート釘等
の固定部材を不透水性基材シート主体の他面に形成した
熱融着性物質層からこの層を通して一次覆工コンクリー
トに打ち込み、防水シートを固定すると共に、熱融着性
物質を溶融させることにより該熱融着性物質で固定部材
を打ち込んだ際に生じる隙間をうめ、固定部材の頭部側
を密封するものである。The waterproof sheet of the present invention has a water-permeable sheet surface facing the primary lining concrete side, and fixing members such as bolts and concrete nails are formed on the other surface of the water-impermeable base sheet. It is poured into the primary lining concrete from the material layer through this layer to fix the waterproof sheet, and by melting the heat-fusible material, it fills the gap that occurs when the fixing member is poured with the heat-fusible material and fixes it. This seals the head side of the member.
このようにして防水シートを張設した場合、−法覆工コ
ンクリート側からの湧水は不透水性基材シート主体によ
り二次覆工コンクリート側に漏出することが防止され、
湧水は透水性シート側を流下するが、この際本発明の防
水シートは不透水性基材シート主体の全面に不織布等の
透水性シートを接着するのではなく、不透水性基材シー
ト主体の一面に不織布等の透水性シートを部分的に複数
箇所で接着し、他の部分は未接着にして不透水性基材シ
ート主体と離間可能に設けたことにより、湧水が通過す
る透水性シートの機能を十分発揮させることができる。When the waterproof sheet is installed in this way, spring water from the concrete lining side is prevented from leaking to the concrete side of the secondary lining mainly due to the impermeable base sheet;
Spring water flows down the water-permeable sheet side, but in this case, the waterproof sheet of the present invention does not adhere a water-permeable sheet such as non-woven fabric to the entire surface of the water-impermeable base sheet, but instead Water-permeable sheets such as non-woven fabric are glued to one side at multiple locations, and other parts are left unattached so that they can be separated from the main body of the water-impermeable base sheet, resulting in water permeability that allows spring water to pass through. The function of the seat can be fully demonstrated.
即ち、従来の不透水性基材シート主体に不織布を全面接
着した防水シートは主体と不織布とが積重面金面にわた
って接着されていた。このため、水不透過性の接着部が
接着面から不織布中に一定の厚さで不織布の全面に形成
され、不織布中の水の透過し得る実質断面積が減少して
おり、水の透過量は少量にならざるを得なかった。これ
に対して、本発明の防水シートは両者の接着部は小部分
であるため、透水性シート中の湧水の透過量は太き（、
しかも透水性シートと不透水性基材シートとの未接着部
間にも湧水が流れるので、通水量が大きいものである。That is, in the conventional waterproof sheet in which a non-woven fabric is adhered to the entire surface of a water-impermeable base sheet, the main body and the non-woven fabric are adhered to each other over the stacked metal surfaces. For this reason, a water-impermeable bond is formed over the entire surface of the non-woven fabric from the adhesive surface to the non-woven fabric, reducing the effective cross-sectional area of the non-woven fabric through which water can permeate. had to be in small quantities. On the other hand, in the waterproof sheet of the present invention, since the bonded portion between the two is small, the amount of spring water that permeates through the water permeable sheet is large (,
Moreover, since spring water also flows between the unbonded portions of the water-permeable sheet and the water-impermeable base sheet, the amount of water passing through is large.
また、本発明の防水シートは、固定部材の打ち込み箇所
を上述したように密封し得るので、該打ち込み箇所から
湧水が二次覆工コンクリート側に漏出することを確実に
防止し得、従って非常に防水機能が高いものである。Furthermore, since the waterproof sheet of the present invention can seal the casting location of the fixing member as described above, it is possible to reliably prevent spring water from leaking from the casting location to the secondary lining concrete side, and therefore, in an emergency. It has a high waterproof function.
以下、本発明の一実施例につき第１〜３図を参照して説
明する。Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3.
第１図中１はトンネル内の一次覆工コンクリート内周面
に釘等で固定され、−次層エコンクリート側からの湧水
が二次覆工コンクリート側に漏出するのを防止する複合
防水シートである。この防水シート１は不透水性基材シ
ート主体２の上面の両側縁部に沿って、表面に螢光塗料
を塗布した複数筒の合成樹脂製リング状枠体３がその下
部周縁に沿って形成した鍔部３ａにおいて接着されてい
ると共に、枠体３の内部には中央部にコンクリート釘挿
入透孔４が穿設された円板状座金５が嵌入され、その上
に熱融着性物質６が充填されている。1 in Figure 1 is a composite waterproof sheet that is fixed to the inner peripheral surface of the primary lining concrete in the tunnel with nails, etc., and prevents spring water from leaking from the second layer concrete side to the secondary lining concrete side. It is. This waterproof sheet 1 has a ring-shaped frame body 3 made of a plurality of cylinders made of synthetic resin, the surface of which is coated with fluorescent paint, formed along both sides of the upper surface of the main body 2 of the water-impermeable base sheet, along its lower peripheral edge. At the same time, a disc-shaped washer 5 with a concrete nail insertion hole 4 bored in the center is fitted inside the frame 3, and a heat-fusible material 6 is placed on top of the disc-shaped washer 5. is filled.
前記主体２の下面には透水性シート７が積重されている
と共に、主体２の他面の前記枠体３に対応する位置にお
いて、主体２の下面と透水性シート７とが部分的に接着
されて第２図に示す接着部９が形成されており、主体２
と透水性シート７との積重面の大部分は未接着のままで
残され、主体２と透水性シート７との間に未接着の間隙
８を形成し得るようになっている。A water-permeable sheet 7 is stacked on the lower surface of the main body 2, and the lower surface of the main body 2 and the water-permeable sheet 7 are partially adhered at a position corresponding to the frame 3 on the other surface of the main body 2. The adhesive part 9 shown in FIG. 2 is formed by bonding the main body 2.
Most of the stacked surface of the main body 2 and the water-permeable sheet 7 is left unbonded, so that an unbonded gap 8 can be formed between the main body 2 and the water-permeable sheet 7.
次に、上記複合防水シート１をトンネル内に取り付ける
場合に付き説明すると、第３図に示すように、まず防水
シート１の透水性シート７側を一次覆工コンクリート１
０内周壁に当接し、前記熱融着性物質６の上面から、座
金５の釘挿入孔４、防水シート１を通して釘１１を一次
覆工コンクリート１０に打込み、これにより防水シート
１を一次覆工コンクリートｌＯに固定する０次いで、釘
１１の頭部１２に加熱溶融した熱融着性物質をハンドガ
ン等の射出装置を用いて射出し、釘１１の頭部１２を熱
融着性物質の被膜１３で水密に被膜するものである。Next, to explain the case where the composite waterproof sheet 1 is installed inside a tunnel, as shown in FIG.
0, a nail 11 is driven into the primary lining concrete 10 through the nail insertion hole 4 of the washer 5 and the waterproof sheet 1 from the upper surface of the heat-fusible material 6, thereby making the waterproof sheet 1 the primary lining. Next, a heat-melted heat-fusible substance is injected onto the head 12 of the nail 11 using an injection device such as a hand gun, and the head 12 of the nail 11 is coated with a heat-fusible substance coating 13. This is a watertight coating.
このようにして、一次覆工コンクリート１０に取付けた
複合防水シート１は、公知の手段で相互に連結せしめた
後、この上に二次覆工コンクリート（図示せず）を打設
するものである。The composite waterproof sheet 1 attached to the primary lining concrete 10 in this manner is interconnected by known means, and then a secondary lining concrete (not shown) is poured thereon. .
本実施例の防水シート１ばシート主体２の下面に透水性
シート７を積重すると共に、積重面を部分的に接着する
ようにしたので、主体２と透水性シート７との積重面の
大部分は前述したように未接着のままで残されている。In the waterproof sheet 1 of this embodiment, the water-permeable sheet 7 is stacked on the lower surface of the sheet main body 2, and the stacked surface is partially adhered, so that the stacked surface of the main body 2 and the water-permeable sheet 7 is Most of it is left unbonded as mentioned above.
このため、主体２と透水性シート７との間に生じる水不
透過性の接着部９は全体のうちの小部分を占めるに過ぎ
ず、透水性シート７の水通過能力が損なわれることが少
ないので、透水性シート７中の水の透過量は大きいもの
である上、主体２と透水性シート７との積重面ば大部分
が未接着であるので、主体２と透水性シート７との間に
間隙を形成し得、この間隙を通して多量の水を流し得る
ものである。Therefore, the water-impermeable adhesive portion 9 formed between the main body 2 and the water-permeable sheet 7 occupies only a small portion of the whole, and the water-passing ability of the water-permeable sheet 7 is rarely impaired. Therefore, the amount of water that permeates through the water-permeable sheet 7 is large, and most of the stacked surfaces of the main body 2 and the water-permeable sheet 7 are not bonded. A gap can be formed between them, through which a large amount of water can flow.
また、シート主体２の上面側には枠体３を接着し、その
中に熱融着性物′１ｔ６を充填したので、この熱融着性
物質６を通して打込んだ釘１１の頭部１２は一部が熱融
着性物質６内に埋没する傾向にあり、このため熱融着性
物質６を釘１１の頭部１２にハンドガン等を用いて射出
した場合、前記頭部１２を覆って被膜１３を容易に形成
できる上、被膜１３と熱融着性物質６とは同質のもので
あるので相互に接着性が良く、水密性の良好な被膜を形
成する。従ってこの釘１１の打込部を通して湧水が一次
覆工コンクリー）１０側から二次覆工コンクリート側へ
漏出するおそれは全くなく、本実施例の防水シート１の
防水は確実なものである。In addition, since the frame 3 is glued to the upper surface side of the sheet main body 2 and the heat-fusible material '1t6 is filled therein, the head 12 of the nail 11 driven through the heat-fusible material 6 is A portion of the heat-fusible material 6 tends to be buried in the heat-fusible material 6. Therefore, when the heat-fusible material 6 is injected onto the head 12 of the nail 11 using a hand gun or the like, a coating is formed covering the head 12. 13 can be easily formed, and since the coating 13 and the heat-fusible substance 6 are of the same quality, they have good mutual adhesion and form a coating with good watertightness. Therefore, there is no risk of spring water leaking from the primary lining concrete 10 side to the secondary lining concrete side through the driving portion of the nail 11, and the waterproofing of the waterproof sheet 1 of this embodiment is reliable.
更に、枠体３に対応する主体２の下面側には小部分の接
着部９が形成されているが、この接着部９は機械的強度
が大きいため、防水シート１を一次覆工コンクリート１
０内周壁に釘１１で固定した場合、防水シートｌが釘１
１の打込部で破れてコンクリート１０内周壁から脱落す
る事故もない。Furthermore, a small adhesive part 9 is formed on the lower surface side of the main body 2 corresponding to the frame 3, but since this adhesive part 9 has a large mechanical strength, the waterproof sheet 1 is attached to the primary lining concrete 1.
0 When fixed to the inner peripheral wall with nails 11, the waterproof sheet l is attached to the nail 1
There have been no accidents where the concrete 10 breaks at the pouring part and falls off the inner circumferential wall of the concrete 10.
また、一次覆工コンクリート１０内周面には通常−次層
エコンクリート打設時に用いるロックボルトの頭部が突
出していることが多く、このロックボルトの頭部で防水
シートが破損されることが多いため、これを防止する目
的で、従来は不織布で頭部を覆うことが行なわれており
、これは手間がかかるものである。これに対し、本実施
例の防水シートによれば、そのまま−次層エコンクリー
ト１０内周壁に取付けることができ、この場合には透水
性シート７が一部破損するだけでシート主体２には損傷
は及ばないものであり、このため防水シートの取付けは
簡単なものである。In addition, the heads of rock bolts used when pouring normal-second layer concrete often protrude from the inner peripheral surface of the primary lining concrete 10, and the waterproof sheet may be damaged by the heads of these rock bolts. Therefore, in order to prevent this, conventionally the head has been covered with a non-woven fabric, but this is time-consuming. On the other hand, according to the waterproof sheet of this embodiment, it can be attached to the inner circumferential wall of the second layer concrete 10 as it is, and in this case, only a part of the water permeable sheet 7 is damaged, but the sheet main body 2 is damaged. Therefore, the installation of the tarpaulin sheet is simple.
更に、二次覆工コンクリートを打設した後においては、
地山の圧力のため、防水シートに張力がかかるが、従来
の不織布をシート主体全面に接着した防氷シートの場合
にはシート主体の伸長度は比較的大きいものの伸長度の
小さい不織布が全面に接着形成されているので、不織布
が破損されるとともにシート自体が破損する。これに対
して、本実施例の防水シート１によれば、伸長度の比較
的小さな不織布等の透水性シート７が地山の圧力で破損
されても、不透水性基材シート主体２とは点接着である
ため、地山の圧力とともに不透水性基材シート主体２が
伸びるので防水シート１の損傷が少ないものである。し
かも、枠体３には螢光塗料を塗布しであるので、比較的
薄暗いトンネル内においても、釘１１の打込場所が容易
に確認でき、作業性の良いものである。Furthermore, after placing the secondary lining concrete,
Tension is applied to the waterproof sheet due to the pressure of the ground, but in the case of conventional anti-icing sheets in which non-woven fabric is bonded to the entire surface of the sheet, the degree of elongation of the sheet itself is relatively large, but the non-woven fabric with a small degree of elongation covers the entire surface. Since it is adhesively formed, the nonwoven fabric is damaged and the sheet itself is damaged. On the other hand, according to the waterproof sheet 1 of this embodiment, even if the water permeable sheet 7 made of non-woven fabric or the like with a relatively small degree of elongation is damaged by the pressure of the earth, the main body 2 of the impermeable base sheet Since point adhesion is used, the water-impermeable base sheet main body 2 stretches with the pressure of the ground, so damage to the waterproof sheet 1 is less likely. Moreover, since the frame body 3 is coated with fluorescent paint, the driving location of the nail 11 can be easily confirmed even in a relatively dimly lit tunnel, resulting in good workability.
更に、防水シート１を製造する際に、枠体３をシート主
体２の上面に加熱融着させる場合には、枠体３がシート
主体２の上面に融着すると共に、シート主体２を通る余
熱でシート主体２の下面と、これと対向する透水性シー
ト７とが同時に熱接着されるため、製造工程が簡略化さ
れ、製造能率の良いものである。Furthermore, when manufacturing the waterproof sheet 1, when the frame 3 is heat-fused to the upper surface of the sheet main body 2, the frame 3 is fused to the upper surface of the sheet main body 2, and residual heat passing through the sheet main body 2 Since the lower surface of the sheet main body 2 and the water permeable sheet 7 facing thereto are simultaneously thermally bonded, the manufacturing process is simplified and manufacturing efficiency is improved.
なお、本実施例においてはシート主体２の両面にそれぞ
れ枠体３と接着部９とを対応させて設けたがこれに限ら
れず、また場合により枠体３を設けず、熱融着性物質６
を直接シート主体の他面に設けることもできる。更に、
−次層エコンクリートｌＯ内周壁に防水シート１を固定
する際に釘１１の頭部１２を覆う被１ｌｉ１３を形成す
る手段も、加熱溶融した熱融着性物質６を射出すること
に限られず、例えば枠体３内の熱融着性物質を通して打
込んだ釘１１の頭部１２附近をバーナー等で加熱して熱
融着性物質６を溶融し、これにより熱融着性物質６が流
動化して頭部１２を覆わしめるようにしても良く、その
信奉発明の要旨を逸脱しない範囲で種々変形して差支え
ない。In this embodiment, the frame body 3 and the adhesive portion 9 are provided on both sides of the sheet main body 2 in correspondence with each other, but the present invention is not limited to this, and in some cases, the frame body 3 is not provided and the heat-fusible material 6 is provided.
can also be provided directly on the other surface of the main body of the sheet. Furthermore,
- The means for forming the cover 1li13 that covers the head 12 of the nail 11 when fixing the waterproof sheet 1 to the inner circumferential wall of the next layer concrete 10 is not limited to injecting the heat-melted material 6; For example, the vicinity of the head 12 of the nail 11 driven through the heat-fusible material in the frame 3 is heated with a burner or the like to melt the heat-fusible material 6, thereby fluidizing the heat-fusible material 6. It is also possible to cover the head 12 with the head 12, and various modifications may be made without departing from the gist of the invention.
以上説明したように、本発明の複合防水シートによれば
一次覆工コンクリート側からの湧水が透水性シート内及
び透水性シートと不透水性基材シート主体との未接着部
間を流下するので、湧水の透過量が大きい、更に、シー
ト主体の他面に形成した熱融着性物質層によって釘等の
固定部材頭部を被覆することができるので、防水性は完
全で一次覆工コンクリート側から二次覆工コンクリート
側への漏水は完全に防止されるの利点を有する。As explained above, according to the composite waterproof sheet of the present invention, spring water from the primary lining concrete side flows down inside the water permeable sheet and between the unbonded parts of the water permeable sheet and the main body of the water impermeable base sheet. Therefore, the amount of permeation of spring water is large.Furthermore, the head of a fixing member such as a nail can be covered with a layer of heat-adhesive material formed on the other side of the main sheet, so it is completely waterproof and can be used as a primary lining. It has the advantage of completely preventing water leakage from the concrete side to the secondary lining concrete side.
第１図は本発明の一実施例を示す斜視図、第２図は同例
の■−■線に沿う断面正面図、第３図は同例を一次覆工
コンクリート内周壁に固定する態様を示す一部省略断面
側面図、第４図は防水シートが配設されるトンネル覆工
部の断面側面図、第５図は従来の防水シートの覆工コン
クリートへの固着態様を示す一部省略断面図である。
１・・・複合防水シート、２・・・シート主体、６・・
・熱融着性物質、７・・・透水性シート、９・・・接着
部、１０・・・一次覆工コンクリート。
出 願 人 藤森工業株式会社Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is a cross-sectional front view of the same example taken along the line Fig. 4 is a cross-sectional side view of the tunnel lining section where the waterproof sheet is installed, and Fig. 5 is a partially omitted cross-section showing how a conventional waterproof sheet is fixed to lining concrete. It is a diagram. 1...Composite waterproof sheet, 2...Sheet main body, 6...
- Heat-fusible substance, 7... Water-permeable sheet, 9... Adhesive part, 10... Primary lining concrete. Applicant: Fujimori Industries Co., Ltd.
Claims (1)
リートとの間に配設され、一次覆工コンクリート側から
の湧水が二次覆工コンクリート側に浸出するのを防止す
る防水シートにおいて、不透水性基材シート主体の一面
に透水性シートを部分的に複数箇所で接着すると共に、
不透水性基材シートの他面上に釘等の固定部材の打込み
箇所に対応して熱融着性物質層を形成したことを特徴と
する防水シート。 ２、熱融着性物質層を透水性シートと不透水性基材シー
トとの接着箇所に設けた特許請求の範囲第１項記載の防
水シート。 ３、熱融着性物質を不透水基材シート主体の他面に接着
された枠体内に充填した特許請求の範囲第１項又は第２
項記載の防水シート。[Claims] 1. Disposed between the primary lining concrete and secondary lining concrete of the tunnel to prevent spring water from the primary lining concrete side from seeping into the secondary lining concrete side. In the waterproof sheet, a water-permeable sheet is partially adhered to one surface of the main body of the water-impermeable base sheet at multiple locations, and
A waterproof sheet characterized in that a heat-fusible material layer is formed on the other side of the water-impermeable base sheet in correspondence to the places where fixing members such as nails are driven. 2. The waterproof sheet according to claim 1, wherein the heat-fusible material layer is provided at the bonding location between the water-permeable sheet and the water-impermeable base sheet. 3. Claims 1 or 2, in which a heat-fusible substance is filled into a frame adhered to the other surface of the main body of the water-impermeable base sheet.
Tarpaulin sheet as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62234178A JPS63171999A (en) | 1987-09-18 | 1987-09-18 | Composite waterproof sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62234178A JPS63171999A (en) | 1987-09-18 | 1987-09-18 | Composite waterproof sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63171999A true JPS63171999A (en) | 1988-07-15 |
| JPH0372800B2 JPH0372800B2 (en) | 1991-11-19 |
Family
ID=16966894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62234178A Granted JPS63171999A (en) | 1987-09-18 | 1987-09-18 | Composite waterproof sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63171999A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003154328A (en) * | 2001-11-26 | 2003-05-27 | Toyo Tire & Rubber Co Ltd | Construction method for applying impervious sheet to wall surface |
-
1987
- 1987-09-18 JP JP62234178A patent/JPS63171999A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003154328A (en) * | 2001-11-26 | 2003-05-27 | Toyo Tire & Rubber Co Ltd | Construction method for applying impervious sheet to wall surface |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0372800B2 (en) | 1991-11-19 |
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