JP2008063734A - Waterproof sheet for tunnel - Google Patents

Waterproof sheet for tunnel Download PDF

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JP2008063734A
JP2008063734A JP2006239932A JP2006239932A JP2008063734A JP 2008063734 A JP2008063734 A JP 2008063734A JP 2006239932 A JP2006239932 A JP 2006239932A JP 2006239932 A JP2006239932 A JP 2006239932A JP 2008063734 A JP2008063734 A JP 2008063734A
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waterproof sheet
tunnel
sheet
primary lining
lining surface
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Tetsuo Hamase
哲郎 浜瀬
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HKS Co Ltd
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HKS Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof sheet for a tunnel preventing the waterproof sheet from being damaged, or torn, even by the load of ready mixed concrete placed in secondary lining with no loss in waterproof sheet spreading and extending work performed while adding. <P>SOLUTION: A plurality of fins 4, 40 arranged to the waterproof sheet 1 to spread the waterproof sheet 1 on a primary lining surface f1 are positioned at suitable spaces along the longitudinal direction of the tunnel. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明はトンネル用防水シートに関し、特に、ＮＡＴＭ工法において一次覆工面へ展着するのに適したトンネル用防水シートに関する。   The present invention relates to a tunnel waterproof sheet, and more particularly to a tunnel waterproof sheet suitable for spreading on a primary lining surface in a NATM method.

山岳、地下、海底などのトンネル建設においては、いわゆるＮＡＴＭ工法を採用することがある。ＮＡＴＭ工法とは、掘削後の岩盤が緩み始める前に、露出した地山面に対してコンクリート材を吹き付け、鋼製の支保工を建て込み、ロックボルトを打設して一次覆工面を形成し、そこへ防水シート材を展着した後，当該防水シートを埋め殺しながら更にコンクリートを打設して二次覆工を施す工法であり、壁面の強化や滲水の遮断によってトンネルの安定性や耐久性を向上させる。 The so-called NATM construction method is sometimes used for tunnel construction in mountains, underground, and seabeds. The NATM method is that before the rock after excavation begins to loosen, concrete material is sprayed onto the exposed ground surface, a steel support is built, and a rock bolt is placed to form the primary lining surface. This is a construction method in which a waterproof sheet material is spread on the surface, and then the concrete is laid down and a concrete lining is applied to cover the waterproof sheet, and then secondary lining is applied. Improve sexiness.

二次覆工に際しては、防水シートを一次覆工面に展着しておく必要があるが、当該防水シートに孔を穿つことなく施工し得る方法として、一端が自由で他端が防水シートに固着された柔軟な帯状のシート材（以下、ヒレという）をその自由端側において一次覆工面に釘などで止着する方法が、既に提案されている。   In the case of secondary lining, it is necessary to spread the waterproof sheet on the primary lining surface, but as a method that can be applied without drilling holes in the waterproof sheet, one end is free and the other end is fixed to the waterproof sheet. A method has already been proposed in which a flexible strip-shaped sheet material (hereinafter referred to as fin) is fixed to the primary lining surface on the free end side with a nail or the like.

しかし、上記従来のヒレは防水シートの裏面にトンネル周方向へ沿って配設されているところ、前述の通り、一次覆工面にはＨ型鋼をトンネル周方向に沿うように曲げて埋没された支保工の一部がトンネルの長さ方向に沿って間欠的に突出しており、防水シートを延設するに際してヒレの位置が支保工と重なる場合には釘などの止着部材を打ち込めない。このため、防水シートを手前側の防水シートの上へ大きく後退させてヒレの位置をずらし、すなわち防水シート同士の重なり代を大きく取ってから溶着することになりシートのムダが生じている。   However, the above-mentioned conventional fins are arranged on the back surface of the waterproof sheet along the circumferential direction of the tunnel. As described above, the primary lining surface is supported by being bent and buried in the H-shaped steel along the circumferential direction of the tunnel. A part of the work protrudes intermittently along the length of the tunnel, and when extending the waterproof sheet, if the position of the fin overlaps with the support work, a fixing member such as a nail cannot be driven. For this reason, the waterproof sheet is largely retracted onto the waterproof sheet on the front side to shift the position of the fins, that is, the sheet is welded after a large allowance between the waterproof sheets is taken, resulting in sheet waste.

また、二次覆工では防水シートにより覆われた一次覆工面をさらにコンクリートで補強するが、このとき、防水シートを一次覆工面の有する凹凸へ沿うように隙間なく展着しなければならず、凹部に対してシートがピンと張った張着状態にあれば打設されたコンクリートの荷重によって当該シートが押圧され破損、裂損等することがある。さらに、一次覆工面と型枠によって形成されるスペースの下方から溜まり始める二次覆工コンクリートがシートの裾部を引っ張ってシート全体にテンションを及ぼし、この影響で防水シートの既に止着した部位が一次覆工面から剥離することもあって、作業はなお問題を有している。
特開平８−３０３１９３号公報 特開２０００−５４８００号公報 Moreover, in the secondary lining, the primary lining surface covered with the waterproof sheet is further reinforced with concrete, but at this time, the waterproof sheet must be spread without gaps along the unevenness of the primary lining surface, If the sheet is tightly stretched with respect to the recess, the sheet may be pressed and damaged, cracked, or the like by the load of the placed concrete. In addition, the secondary lining concrete that starts to accumulate from below the space formed by the primary lining surface and the formwork pulls the hem of the sheet and exerts tension on the entire sheet, and the affected part of the waterproof sheet is already fixed The work still has problems, as it may delaminate from the primary lining surface.
JP-A-8-303193 JP 2000-54800 A

本発明は上記のような問題点に鑑み、継ぎ足し乍ら行う防水シートの展着、延設作業においてロスがなく、かつ、二次覆工に際して打設される生コンクリートの荷重によっても当該防水シートが破損、裂損等しないようにしたトンネル用防水シートを提供することを課題とするものである。   In view of the above problems, the present invention has no loss in the spreading and extending work of the waterproof sheet to be added, and the waterproof sheet is also applied by the load of ready-mixed concrete to be cast in the secondary lining It is an object of the present invention to provide a tunnel waterproof sheet that is prevented from being damaged or broken.

上記課題を解決することを目的としてなされた本発明トンネル用防水シートの構成は、一次覆工面に防水シートを展着するために当該防水シートへ配設する複数枚のヒレをトンネル長さ方向に沿って適宜間隔を置いて位置付けたことを特徴とするものである。   The structure of the waterproof sheet for a tunnel of the present invention made for the purpose of solving the above-mentioned problem is that a plurality of fins arranged on the waterproof sheet are arranged in the tunnel length direction in order to spread the waterproof sheet on the primary lining surface. It is characterized in that it is positioned with an appropriate interval along.

本発明は、トンネル建設において防水シートに配設する複数枚のヒレをトンネル長さ方向に沿って位置付けたことにより、突出する支保工の位置に関係なく一次覆工面へヒレを止着できるから、防水シート同士の継ぎ目において当該シートを重複させる重なり代を設計どおりに設定でき、防水シートのムダな使用を回避できる。さらに、不陸な一次覆工面に隙間なく追従させながら防水シートを展着できるため、打設された二次覆工コンクリートの荷重によっても当該防水シートが破損、裂損等することはなく、遮水性を確保しつつ施工できるという効果を有する。   Since the present invention is positioned along the tunnel length direction of a plurality of fins disposed on the waterproof sheet in tunnel construction, the fins can be fixed to the primary lining surface regardless of the position of the projecting support, The overlap allowance for overlapping the sheets at the joint between the waterproof sheets can be set as designed, and wasteful use of the waterproof sheets can be avoided. In addition, since the waterproof sheet can be spread while following the uneven primary lining surface without any gaps, the waterproof sheet will not be damaged or broken even by the load of the secondary lining concrete that has been placed. It has the effect of being able to be constructed while ensuring aqueous properties.

次に、本発明の実施の形態例について図により説明する。図１は本発明に係るトンネル用防水シートの一例の要部を示した斜視図、図２は従来型のトンネル用防水シートの要部を例示した斜視図、図３は本発明防水シートのヒレを一次覆工面に止着した状態を模式的に例示した側端面図、図４は従来型防水シートのヒレを一次覆工面に止着した状態を模式的に例示した側端面図、図５は一次覆工面に張着された防水シートと二次覆工コンクリートを模式的に拡大して例示した側端面図である。   Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view illustrating a main part of an example of a waterproof sheet for tunnel according to the present invention, FIG. 2 is a perspective view illustrating the main part of a conventional tunnel waterproof sheet, and FIG. 3 is a fin of the waterproof sheet of the present invention. FIG. 4 is a side end view schematically illustrating the state where the fin of the conventional waterproof sheet is fixed to the primary lining surface, and FIG. It is the side end figure which expanded and illustrated typically the waterproof sheet and secondary lining concrete stuck on the primary lining surface.

図１において、１は本発明に係るトンネル用防水シートの一例であって、掘削した地山面ｆ０（図３〜図４参照）からの滲水を遮断する止水材２と、当該止水材２を一次覆工面ｆ１の凹凸から保護する緩衝材３の二層からなっている。本実施例において止水材２は、一例としてエチレン酢酸ビニル共重合体からなる厚さ０．８ミリメートル程度のシート材で形成され、一次覆工面ｆ１側の適宜箇所において前記緩衝材３と貼着され一体化している。止水材２の厚さ設計は、防水シート１の熱溶着時における確実性と、その重量による作業時の困難性との兼合いから適宜決定されるものであり、本実施例においては望ましい設定値として０．８ミリメートルを選択しているが、設計はこれに限られるものではなく０．８ミリメートル以上、或は、０．８ミリメートル以下としてもよい。また、止水材２の素材は遮水性を備えればよいから、ポリ塩化ビニル（ＰＶＣ）やエチレン共重合体・ビューチメン（ＥＣＢ）等の合成樹脂製素材、或は、ゴム、人工皮革、その他によって形成することは任意であるが、互いに重ね合わせて延設できるよう電磁熱等によって溶着可能な材質であることが望ましい。なお、本発明の技術は後述するように、止水材２と緩衝材３とを別々にして施工するいわゆる分離型シートにおいても適用可能であり、本実施例の防水シートのように二層一体化された形態に限るものではない。因みに、図１、図２の上下方向はトンネルの周方向に、左右方向はトンネルの長さ方向に沿っている。   In FIG. 1, 1 is an example of the waterproof sheet for a tunnel according to the present invention, and a water-stopping material 2 that blocks water from the excavated natural ground surface f0 (see FIGS. 3 to 4), and the water-stopping material. 2 is composed of two layers of cushioning material 3 that protects the unevenness of the primary lining surface f1. In this embodiment, the water stop material 2 is formed of a sheet material having a thickness of about 0.8 mm made of an ethylene vinyl acetate copolymer as an example, and is bonded to the buffer material 3 at an appropriate location on the primary lining surface f1 side. Are integrated. The thickness design of the water blocking material 2 is appropriately determined from the balance between the certainty at the time of thermal welding of the waterproof sheet 1 and the difficulty at the time of work due to its weight, and is desirable setting in this embodiment. Although 0.8 mm is selected as the value, the design is not limited to this, and the value may be 0.8 mm or more, or 0.8 mm or less. In addition, since the water-stopping material 2 is only required to have water-blocking properties, synthetic resin materials such as polyvinyl chloride (PVC), ethylene copolymer / buchimen (ECB), rubber, artificial leather, etc. However, it is desirable to use a material that can be welded by electromagnetic heat or the like so as to overlap and extend. In addition, as will be described later, the technique of the present invention can be applied to a so-called separation-type sheet in which the water blocking material 2 and the buffer material 3 are separately applied, and two-layer integrated like the waterproof sheet of this embodiment. It is not limited to a simplified form. Incidentally, the vertical direction of FIGS. 1 and 2 is along the circumferential direction of the tunnel, and the horizontal direction is along the length direction of the tunnel.

上記緩衝材３は、厚さが３〜５ミリメートル程の不織布層により形成されており、防水シート１の一次覆工面ｆ１側へ接着剤等により接着、或は、熱溶着されている。一次覆工面ｆ１は、露出したロックボルトＬの鋭利な断面や吹き付けられたコンクリート材Ｃ１の凹凸等によりきわめて不陸であるが、不織布層は緩衝材として破損することなくこれに耐え得るものであることを要する。なお、不織布層の厚さは３〜５ミリメートルに限られるものではなく、３ミリメートル以下、或は、５ミリメートル以上に設計することは任意である。   The cushioning material 3 is formed of a nonwoven fabric layer having a thickness of about 3 to 5 millimeters, and is bonded or heat welded to the primary lining surface f1 side of the waterproof sheet 1 with an adhesive or the like. The primary lining surface f1 is extremely uneven due to the sharp cross section of the exposed rock bolt L and the unevenness of the sprayed concrete material C1, but the nonwoven fabric layer can withstand this without being damaged as a cushioning material. It takes a thing. In addition, the thickness of a nonwoven fabric layer is not restricted to 3-5 millimeters, It is arbitrary to design to 3 millimeters or less, or 5 millimeters or more.

二次覆工コンクリートを打設する前には、遮水性を維持しながら防水シート１を一次覆工面ｆ１へ展着する必要があり、シートに孔を開けることなく施工するためにはいわゆるヒレ部材を用いる方法が有効である。このために、前記緩衝材３には防水シート１を一次覆工面ｆ１に止着するためのヒレ部材４が取り付けてある。このヒレ４は、前記緩衝材３と同様の不織布により形成されているが、引張、引裂に耐える素材であれば織布、合成樹脂、ゴム、皮革その他の素材により形成することは任意である。また、止水材２と緩衝材３を貼着一体化しない分離型シートの場合においては、止水材２に対して直接ヒレ４を固着し（図示せず）、先に一次覆工面ｆ１へ固定された緩衝材３に当該ヒレ４を止着することによって、止水材２を損傷することなく防水シート１を展着できる。   Before placing the secondary lining concrete, it is necessary to spread the waterproof sheet 1 on the primary lining surface f1 while maintaining water shielding. In order to construct the sheet without making a hole, a so-called fin member is used. The method using is effective. For this purpose, a fin member 4 for attaching the waterproof sheet 1 to the primary lining surface f1 is attached to the cushioning material 3. The fin 4 is formed of the same non-woven fabric as the cushioning material 3, but may be formed of woven fabric, synthetic resin, rubber, leather or other materials as long as the material can withstand tension and tearing. Further, in the case of a separation type sheet in which the water blocking material 2 and the buffer material 3 are not bonded and integrated, the fin 4 is directly fixed to the water blocking material 2 (not shown), and first to the primary lining surface f1. The waterproof sheet 1 can be spread without damaging the water blocking material 2 by fixing the fins 4 to the fixed cushioning material 3.

本実施例の止水材２と緩衝材３とは、防水シート１の左右端域約２００〜２５０ミリメートルにおいては貼着せず、分離した構造が採られている。これにより、止水材２はその左右端域を重なり代５として互いに重畳でき、重ね合わせて（積層して）、或は、拝み合わせて（合掌タイプで）溶着することによって防水シート１をトンネル長さ方向へと延設できる。本実施例においてヒレ４は、防水シート１同士の重なり代５における熱溶着作業の支障とならないように防水シート１の幅よりもやや短く乃至はほぼ同じ長さで形成されている（図１参照）。或は、ヒレ４が防水シート１の少なくとも一端縁部において当該防水シート１に固着されず自由となるように形成して、熱溶着作業の支障となるのを回避してもよい。   The waterproofing material 2 and the buffer material 3 of the present embodiment are not attached in the left and right end regions of about 200 to 250 millimeters of the waterproof sheet 1 and are separated from each other. As a result, the waterproofing material 2 can overlap the left and right end regions with the overlap margin 5, and the waterproof sheet 1 can be tunneled by being overlapped (laminated) or welded together (in a palm type). Can extend in the length direction. In this embodiment, the fins 4 are formed slightly shorter or substantially the same length as the width of the waterproof sheet 1 so as not to hinder the heat welding operation in the overlap margin 5 between the waterproof sheets 1 (see FIG. 1). ). Alternatively, the fins 4 may be formed so as to be free without being fixed to the waterproof sheet 1 at at least one edge portion of the waterproof sheet 1 so as to avoid an obstacle to the heat welding operation.

一方、従来型の防水シート１０においては、図２に例示するように、ヒレ４０がトンネル周方向に沿って取り付けられていた。このため、例えば坑口側から防水シート１０を延設して行くに際して、ヒレ４０が前述の鋼製支保工と位置的に重なるときは釘等による止着が不可能なため、手前側へ引き戻して重なり代５０を余計に取らざるを得ずムダとなっていたことは既に述べた通りである。   On the other hand, in the conventional waterproof sheet 10, as illustrated in FIG. 2, the fin 40 is attached along the circumferential direction of the tunnel. For this reason, for example, when extending the waterproof sheet 10 from the wellhead side, if the fin 40 overlaps with the steel support described above, it cannot be fixed with a nail or the like. As already mentioned, it was inevitable that the overlap allowance 50 would have to be taken extra.

また、従来型の防水シート１０は一次覆工面ｆ１に対し、ヒレ４０や緩衝材３０の左右端域をトンネル周方向に沿って止着されるだけであるため、隙間なく当該シート１０を展着することは難しい（図５参照）。このため、二次覆工コンクリートC２の打設によって一次覆工面ｆ１の凹凸部分へ押圧された従来型の防水シート１０が破損、裂損等して不都合の起きていたことは既に述べた通りである。   Further, since the conventional waterproof sheet 10 is merely attached to the left and right end regions of the fin 40 and the cushioning material 30 along the circumferential direction of the tunnel with respect to the primary lining surface f1, the sheet 10 is spread without any gap. It is difficult to do (see FIG. 5). For this reason, as described above, the conventional waterproof sheet 10 pressed against the uneven portion of the primary lining surface f1 by the placement of the secondary lining concrete C2 has been damaged and broken. is there.

そこで本発明トンネル用防水シート１は、図１に例示したように、緩衝材３に対して（或は、止水材２に対して直接）ヒレ４をトンネル長さ方向に沿って配設したことによって、上述の不具合を解消したので、この点について図１〜図５を参照しつつ以下に説明する。   Therefore, in the tunnel waterproof sheet 1 of the present invention, as illustrated in FIG. 1, the fins 4 are arranged along the tunnel length direction with respect to the buffer material 3 (or directly with respect to the water blocking material 2). As a result, the above-described problems have been solved, and this point will be described below with reference to FIGS.

図１において例示する本発明防水シート１は、緩衝材３の一次覆工面ｆ１側へトンネル長さ方向に沿ってヒレ４を備えており、また、その左右端域を重なり代５とすることで溶着、延設可能である。このヒレ４は、図１において上下幅が１０〜２０センチメートル程度、長さが防水シート１とほぼ同程度乃至少し短い程度に形成されており、上下幅における一端が緩衝材３へ固着され他端は自由である。このため、防水シート１の展着において、当該シート１が支保工と出会っても、各ヒレ４において支保工を跨いだ位置で一次覆工面ｆ１へ釘等により止着できるため、支保工の存在は弊害とならず、図２の従来シート１０のヒレ４０の位置形態により生じていたムダは一切ない。   The waterproof sheet 1 of the present invention illustrated in FIG. 1 includes fins 4 along the tunnel length direction toward the primary lining surface f1 side of the cushioning material 3, and the left and right end regions thereof have an overlap margin 5. Can be welded and extended. The fin 4 has a vertical width of about 10 to 20 centimeters in FIG. 1 and a length that is substantially the same as or slightly shorter than the waterproof sheet 1, and one end of the vertical width is fixed to the cushioning material 3. The edge is free. For this reason, even if the sheet 1 meets the support in the spreading of the waterproof sheet 1, it can be fixed to the primary lining surface f1 with a nail or the like at the position across the support in each fin 4. 2 is not harmful, and there is no waste caused by the position of the fin 40 of the conventional sheet 10 in FIG.

本実施例においては、内周長２０メートル程度のトンネルに対してヒレ４が合計で２０枚前後となるように設計されており、各ヒレ４同士は約１メートル間隔で取り付けられている。そして、ヒレ４にはトンネル長さ方向に沿って複数の止着部材７を配設できるから、一次覆工面ｆ１に追従させながら防水シート１を隙間なく展着するのに要する止着箇所を、トンネル周方向と長さ方向のいずれにおいても十分な数と自由な位置で確保することができる。これにより、防水シート１が不陸な一次覆工面ｆ１に対して張着された状態となることを回避でき、その結果、二次覆工コンクリートＣ２の荷重により当該シート１が破損、裂損等することを阻止する。また、防水シート１は従来シート１０よりも多くの止着部材７をもって一次覆工面へ展着することができるため、これによって大きな固着力を得た防水シート１は二次覆工コンクリートＣ２の及ぼすテンションによっても一次覆工面ｆ１から剥離することはない。   In the present embodiment, the design is such that the total number of fins 4 is about 20 for a tunnel having an inner peripheral length of about 20 meters, and the fins 4 are attached at intervals of about 1 meter. And since the several fixing member 7 can be arrange | positioned along the tunnel length direction in the fin 4, the fixing location required in order to spread the waterproof sheet 1 without gap, following the primary lining surface f1, A sufficient number and free positions can be secured in both the tunnel circumferential direction and the length direction. Thereby, it can avoid that the waterproof sheet 1 will be in the state stuck to the primary lining surface f1 which is not landed, As a result, the said sheet | seat 1 is damaged by the load of secondary lining concrete C2, a tear, etc. To stop doing. Further, since the waterproof sheet 1 can be spread on the primary lining surface with more fastening members 7 than the conventional sheet 10, the waterproof sheet 1 having a large fixing force exerted by the secondary lining concrete C2 thereby. The primary lining surface f1 is not peeled off even by the tension.

さらに、防水シート一枚当りの固着力を大きくできれば、当該シート一枚当りのサイズも大きくして固着することができる。この結果、従来シート１０が一枚当りトンネル長さ方向に沿って２メートル程度の長さ（前後方向の幅）で加工されていたところ、本発明の防水シート１にあっては一枚当り４〜６メートル程度で形成し、施工することが可能となった。これによって、トンネル内壁における単位面積当たりの溶着箇所が大幅に削減され、現場の作業負担を軽減できるとともに、防水シート１による遮水性を高いままに維持することが可能となる。   Further, if the fixing force per waterproof sheet can be increased, the size per sheet can be increased and fixed. As a result, when the conventional sheet 10 is processed with a length of about 2 meters (width in the front-rear direction) along the tunnel length direction per sheet, in the waterproof sheet 1 of the present invention, 4 sheets per sheet. It was possible to form and construct with about ~ 6 meters. As a result, the number of welded locations per unit area on the inner wall of the tunnel can be greatly reduced, the work burden on the site can be reduced, and the water shielding by the waterproof sheet 1 can be kept high.

なお、トンネル周方向に沿ってシートを巻き取ると、従来型防水シート１０はヒレ４０の配置構造によりシート幅方向の中間部が膨出した紡錘形の不安定な状態で巻き取られるところ、本発明の防水シート１はヒレ４がトンネル長さ方向に配設されるために従来型のシート１０よりも安定した形状をもって巻き取ることができることから、作業時や運搬時の取扱いにおいても優れている。同様の理由により、シートを巻き取らずにジグザグに折り畳むいわゆるジャバラ折りにおいても、本発明の防水シート１は安定した折畳状態を提供できるので、防水シート１の展着作業も円滑に行い得るなど高い実用性を備えている。   In addition, when the sheet is wound along the circumferential direction of the tunnel, the conventional waterproof sheet 10 is wound in a spindle-shaped unstable state in which the intermediate portion in the sheet width direction bulges due to the arrangement structure of the fins 40. The waterproof sheet 1 can be wound with a more stable shape than the conventional sheet 10 because the fins 4 are arranged in the tunnel length direction, and is excellent in handling during work and transportation. For the same reason, even in the so-called bellows folding in which the sheet is folded in a zigzag manner, the waterproof sheet 1 of the present invention can provide a stable folded state, so that the waterproof sheet 1 can be smoothly spread out. It has high practicality.

本発明は以上の通りであって、トンネル建設において一次覆工面と防水シートとを展着するために当該防水シートへ配設する複数枚のヒレをトンネル長さ方向に沿って位置付けたことによって、一次覆工面へ突出する鋼製支保工の位置に影響されることなくヒレを止着でき、かつ、不陸な一次覆工面に隙間なく追従しながら防水シートを展着できることから、打設された二次覆工コンクリートの荷重によっても当該防水シートが破損、裂損等することはなくなり、遮水性を高く維持しつつ施工できるという効果があるから、トンネル用防水シートとしてきわめて有用である。   The present invention is as described above, and in order to spread the primary lining surface and the waterproof sheet in the tunnel construction, a plurality of fins disposed on the waterproof sheet are positioned along the tunnel length direction. It was installed because the fins can be fixed without being affected by the position of the steel support projecting to the primary lining surface, and the waterproof sheet can be spread while following the uneven primary lining surface without any gaps. The waterproof sheet is not damaged or cracked even by the load of the secondary lining concrete, and can be constructed while maintaining a high water-blocking property. Therefore, the waterproof sheet is extremely useful as a tunnel waterproof sheet.

本発明に係るトンネル用防水シートの一例の要部を示した斜視図The perspective view which showed the principal part of an example of the waterproof sheet for tunnels which concerns on this invention 従来型のトンネル用防水シートの要部を例示した斜視図The perspective view which illustrated the principal part of the conventional waterproof sheet for tunnels 本発明防水シートのヒレを一次覆工面に止着した状態を模式的に例示した側端面図Side end view schematically illustrating a state in which the fin of the waterproof sheet of the present invention is fixed to the primary lining surface 従来型防水シートのヒレを一次覆工面に止着した状態を模式的に例示した側端面図Side end view schematically illustrating a state where fins of a conventional waterproof sheet are fixed to a primary lining surface 一次覆工面に張着された防水シートと二次覆工コンクリートを模式的に拡大して例示した側端面図Side end view schematically exemplifying a waterproof sheet and secondary lining concrete stuck to the primary lining surface

符号の説明Explanation of symbols

１ 本発明防水シート
１０ 従来型防水シート
２，２０ 止水材
３、３０ 緩衝材
４，４０ ヒレ
５、５０ 重なり代
６ 型枠
７ 止着部材
Ｌ ロックボルト
ｆ０ 地山面
ｆ１ 一次覆工面
ｆ２ 二次覆工面
Ｃ１ 一次覆工用コンクリート
Ｃ２ 二次覆工用コンクリート DESCRIPTION OF SYMBOLS 1 This invention waterproof sheet 10 Conventional type waterproof sheet 2,20 Waterproof material 3,30 Buffer material 4,40 Fin 5,50 Overlap allowance 6 Formwork 7 Fastening member L Lock bolt f0 Ground mountain surface f1 Primary lining surface f2 Two Secondary lining surface C1 Primary lining concrete C2 Secondary lining concrete

Claims (5)

トンネル用防水シートであって、その防水シートを一次覆工面に展着するため複数枚のヒレを当該防水シートのトンネル長さ方向に沿って適宜間隔を置いて配設したことを特徴とするトンネル用防水シート。   A tunnel waterproof sheet, wherein a plurality of fins are arranged at appropriate intervals along the tunnel length direction of the waterproof sheet in order to spread the waterproof sheet on the primary lining surface. Waterproof sheet. 前記防水シートは、前記防水シートが有する止水材に対して前記ヒレを固着した請求項１のトンネル用防水シート。   The waterproof sheet for tunnels according to claim 1, wherein the waterproof sheet has the fin fixed to a water stop material of the waterproof sheet. 前記防水シートは、前記防水シートが有する緩衝材に対して前記ヒレを固着した請求項１のトンネル用防水シート。   The waterproof sheet for tunnel according to claim 1, wherein the waterproof sheet has the fin fixed to a cushioning material of the waterproof sheet. 前記ヒレのトンネル長さ方向の長さは、前記防水シートとほぼ同じであり当該防水シートの少なくとも一端縁部において当該防水シートに対して自由である、或は、前記防水シートよりもやや短い請求項１〜３のいずれかのトンネル用防水シート。   The length of the fin in the tunnel length direction is substantially the same as that of the waterproof sheet, and is free with respect to the waterproof sheet at least at one end edge of the waterproof sheet, or slightly shorter than the waterproof sheet. Item 1. The waterproof sheet for tunnel according to any one of Items 1 to 3. 前記緩衝材は、不織布である請求項１〜４のいずれかのトンネル用防水シート。   The waterproof sheet for tunnel according to any one of claims 1 to 4, wherein the cushioning material is a nonwoven fabric.
JP2006239932A 2006-09-05 2006-09-05 Waterproof sheet for tunnel Pending JP2008063734A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011196087A (en) * 2010-03-19 2011-10-06 Fujimori Kogyo Co Ltd Method of stretching waterproof sheet and carriage for stretching waterproof sheet

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JPH03206297A (en) * 1989-09-29 1991-09-09 Bridgestone Corp Waterproof sheet for tunnel and fixing structure thereof
JPH05141197A (en) * 1991-11-15 1993-06-08 Bridgestone Corp Construction sheet for tunnel and setting method therefor
JPH05156897A (en) * 1991-12-10 1993-06-22 Kanko Eng Kk Water-proof sheet extending method and water-proof sheet to be used
JPH05287991A (en) * 1992-04-08 1993-11-02 Bridgestone Corp Water proof sheet mounting method and device
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JPH08303193A (en) * 1995-02-15 1996-11-19 Bridgestone Corp Waterproof sheet for underground structure and execution work method therefor
JPH09123332A (en) * 1995-10-31 1997-05-13 Fujimori Kogyo Kk Waterproof sheet
JPH09310595A (en) * 1996-05-24 1997-12-02 Bridgestone Corp Waterproof sheet with sheet for connection
JPH1096396A (en) * 1996-09-24 1998-04-14 Masayuki Sadatsuka Fitting structure for water stop sheet for tunnel and fitting method
JP2000054800A (en) * 1998-08-10 2000-02-22 Fujimori Kogyo Kk Waterproof sheet and method for stretching the same
JP2002195000A (en) * 1993-02-17 2002-07-10 C I Kasei Co Ltd Waterproof sheet and its stretching method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03206297A (en) * 1989-09-29 1991-09-09 Bridgestone Corp Waterproof sheet for tunnel and fixing structure thereof
JPH05141197A (en) * 1991-11-15 1993-06-08 Bridgestone Corp Construction sheet for tunnel and setting method therefor
JPH05156897A (en) * 1991-12-10 1993-06-22 Kanko Eng Kk Water-proof sheet extending method and water-proof sheet to be used
JPH05287991A (en) * 1992-04-08 1993-11-02 Bridgestone Corp Water proof sheet mounting method and device
JP2002195000A (en) * 1993-02-17 2002-07-10 C I Kasei Co Ltd Waterproof sheet and its stretching method
JPH06323096A (en) * 1993-05-14 1994-11-22 C I Kasei Co Ltd Waterproof sheet
JPH08303193A (en) * 1995-02-15 1996-11-19 Bridgestone Corp Waterproof sheet for underground structure and execution work method therefor
JPH09123332A (en) * 1995-10-31 1997-05-13 Fujimori Kogyo Kk Waterproof sheet
JPH09310595A (en) * 1996-05-24 1997-12-02 Bridgestone Corp Waterproof sheet with sheet for connection
JPH1096396A (en) * 1996-09-24 1998-04-14 Masayuki Sadatsuka Fitting structure for water stop sheet for tunnel and fitting method
JP2000054800A (en) * 1998-08-10 2000-02-22 Fujimori Kogyo Kk Waterproof sheet and method for stretching the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011196087A (en) * 2010-03-19 2011-10-06 Fujimori Kogyo Co Ltd Method of stretching waterproof sheet and carriage for stretching waterproof sheet

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