JP3284426B2 - Tarpaulin - Google Patents
TarpaulinInfo
- Publication number
- JP3284426B2 JP3284426B2 JP13605993A JP13605993A JP3284426B2 JP 3284426 B2 JP3284426 B2 JP 3284426B2 JP 13605993 A JP13605993 A JP 13605993A JP 13605993 A JP13605993 A JP 13605993A JP 3284426 B2 JP3284426 B2 JP 3284426B2
- Authority
- JP
- Japan
- Prior art keywords
- waterproof sheet
- ground
- cloth
- mounting
- tunnel
- 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.)
- Expired - Lifetime
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、トンネル掘穿坑道の内
壁面に展張され、該坑道の地山から浸出する湧水を前記
坑道の両側底に集排水させる防水シートに関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sheet which is spread on the inner wall surface of a tunnel excavation tunnel and collects and drains spring water leaching from the ground of the tunnel at both bottoms of the tunnel.
【０００２】[0002]
【従来の技術】ＮＡＴＭ工法において、トンネル掘穿坑
道を掘削したのち、その内壁面となる地山の表面には、
一次覆工としてのコンクリートが吹きつけられる。そし
て、この一次覆工コンクリートに防水シートを展張さ
せ、この防水シートに二次覆工コンクリートが打設され
る。すなわち、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、防水シートを介装させ、一次覆工コン
クリート側からの湧水をこの一次覆工コンクリートと防
水シートとの間に通水させ、前記湧水を二次覆工コンク
リート側に浸出することを防止している。2. Description of the Related Art In the NATM method, after excavating a tunnel excavation road, the surface of the ground, which is the inner wall surface,
Concrete is sprayed as primary lining. Then, a waterproof sheet is spread on the primary lining concrete, and the secondary lining concrete is cast on the waterproof sheet. That is, between the primary lining concrete and the secondary lining concrete, a waterproof sheet is interposed, and spring water from the primary lining concrete side is allowed to flow between the primary lining concrete and the waterproof sheet, The spring water is prevented from seeping out to the secondary lining concrete side.
【０００３】従来、この防水シートは、遮水シートと、
透水性緩衝材としての不織布やループ状起毛織布とを積
層して形成された構造が知られている。そして、この防
水シートを前記一次覆工コンクリートに展張させるに
は、前記透水性緩衝材をこの一次覆工コンクリート面に
当接させ、その両側縁を釘等を用い、坑道の横断方向へ
順次、固定させていた。また、広幅の防水シートの場
合、その展張時に、防水シートの中央部分が自重で弛ん
でしまうため、その略中央に帯状に形成された中間止め
用の取付け片を備えた防水シートも開発されている（実
開昭６１−５８２９９号公報）。[0003] Conventionally, this waterproof sheet has a waterproof sheet,
2. Description of the Related Art A structure formed by laminating a nonwoven fabric or a loop-like raised woven fabric as a water-permeable cushioning material is known. Then, in order to spread the waterproof sheet on the primary lining concrete, the water permeable cushioning material is brought into contact with the primary lining concrete surface, and both side edges thereof are nailed or the like, sequentially in the transverse direction of the tunnel, It was fixed. Also, in the case of a wide waterproof sheet, the central part of the waterproof sheet is loosened by its own weight when the waterproof sheet is expanded. Therefore, a waterproof sheet having a belt-shaped mounting piece for an intermediate stopper substantially at the center has been developed. (Japanese Utility Model Application Laid-Open No. 61-58299).
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た従来の防水シートは、作業者の手作業で施工していた
が、作業効率を上げる為、展張装置による施工が行われ
るようになってきた。この場合、展張装置の押さえロー
ラで防水シートを地山側壁面へ押さえる為、中間止片を
固定する作業性が悪いという欠点が発生した。However, the above-mentioned conventional waterproof sheet has been constructed manually by an operator. However, construction has been carried out by a stretching device in order to increase work efficiency. In this case, since the waterproofing sheet is pressed against the ground side wall surface by the pressing roller of the spreading device, there is a disadvantage that workability for fixing the intermediate stopper is poor.
【０００５】そこで本発明は、上記問題点を解消するた
めに、地山側に対して作業性のよい防水シートを提供す
ることを目的としている。Accordingly, an object of the present invention is to provide a waterproof sheet having good workability on the ground side in order to solve the above problems.
【０００６】[0006]
【課題を解決するための手段】次に、上記の目的を達成
するための手段を、実施例に対応する図面（図１４）を
参照して説明する。Next, means for achieving the above object will be described with reference to the drawings (FIG. 14) corresponding to the embodiments.
【０００７】この発明の防水シート３１は、トンネル掘
穿坑道２０の内壁面に展張され、該坑道２０の地山２１
側から浸出する湧水を前記坑道２０の底部に集排水させ
る防水シートにおいて、遮水シート３２の地山対接面３
２ａに、通水性を有する緩衝布３３が、中間の複数の箇
所が接着されて重複形成されているとともに、前記緩衝
布３３の前記地山に対接する面に、緩衝布３３の長さ方
向に所定間隔となるように、複数の取付片３４を、緩衝
布３３の幅方向に取り付け配設し、前記各取付片３４
は、その長辺を前記緩衝布３３の幅方向に対しやや斜め
となるように取り付けた構成としたことを特徴としてい
る。[0007] The waterproof sheet 31 of the present invention is spread on the inner wall surface of the tunnel excavation road 20, and
A waterproof sheet for collecting and draining spring water leaching from the side at the bottom of the tunnel 20.
In 2a, a plurality of buffer cloths 33 having water permeability are bonded and formed at a plurality of intermediate locations, and a surface of the buffer cloth 33 which is in contact with the ground is provided in a length direction of the buffer cloth 33. A plurality of attachment pieces 34 are attached and arranged in the width direction of the cushioning cloth 33 so as to be at a predetermined interval.
Is characterized in that its long side is attached to be slightly oblique to the width direction of the cushioning cloth 33.
【０００８】前記取付片３４は、その長辺の一方の辺を
前記緩衝布の幅方向に沿って逢着する逢着部分とし、他
方の長辺を緩衝布の面より浮き上がる自由端縁部分３４
ｂとすることが望ましい。The mounting piece 34 has one of its long sides as an attachment portion to meet along the width direction of the cushioning cloth, and the other long side of the free edge portion 34 rising from the surface of the cushioning cloth.
It is desirable to set b.
【０００９】また、図１５の実施例の示すように、トン
ネル掘穿坑道２０の上部内壁面４５に当接される部分の
前記取付片の取付間隔は、下部内壁面４６に当接される
部分の前記取付片の取付間隔より小さいことが望まし
い。Further, as shown in the embodiment of FIG. 15, the mounting interval of the mounting piece in the portion abutting on the upper inner wall surface 45 of the tunnel excavation road 20 is the portion in contact with the lower inner wall surface 46. It is preferable that the distance is smaller than the mounting interval of the mounting pieces.
【００１０】この発明の防水シートの展張方法は、ロー
ル状に巻回された防水シートを解反させるとともに、該
防水シートの緩衝布面を展張装置の押さえローラで前記
地山側へ当接させ、同時に該防水シートの緩衝布の側縁
を地山側へ固定させるとともに、前記取付片を地山側へ
固定して、前記坑道の内壁面を横断方向に連続して被着
させるようにする。また、この展張方法において、防水
シートの緩衝布の側縁と取付片は、押さえ板３６（図１
２参照）を介して地山側へ固定させることとしてもよ
い。In the method for spreading a waterproof sheet according to the present invention, the waterproof sheet wound in a roll is released, and the cushioning surface of the waterproof sheet is brought into contact with the ground side by a pressing roller of a spreading device. At the same time, the side edge of the cushioning cloth of the waterproof sheet is fixed to the ground side, and the mounting piece is fixed to the ground side so that the inner wall surface of the tunnel is continuously applied in the transverse direction. Further, in this stretching method, the side edge of the cushioning cloth and the mounting piece of the waterproof sheet are attached to the holding plate 36 (FIG. 1).
2) may be fixed to the ground side.
【００１１】[0011]
【作用】図１乃至図６の参考例に示すように、上記の防
水シートでは、遮水シートの地山対接面に、通水性を有
する緩衝布が、部分接着により中間の複数箇所が接着さ
れて重複形成され、また、この緩衝布の地山に対接する
面に、取付片が所望の位置に適宜配設される。そして、
ロール状に巻回された前記防水シートを解反させるとと
もに、該防水シートの緩衝布面を地山側へ当接させ、同
時に該防水シートの緩衝布の側縁及び、前記取付片を地
山２１側へ固定して、前記坑道２０の内壁面２０ａの横
断方向に連続して被着し、展張させる。これにより、坑
道２０の地山２１から浸出する湧水を前記坑道２０の底
部に集排水させる。As shown in the reference examples of FIGS. 1 to 6, in the above waterproof sheet, a water-permeable buffer cloth is attached to the surface of the waterproof sheet facing the ground, and a plurality of intermediate portions are bonded by partial bonding. The mounting piece is disposed at a desired position on a surface of the cushioning cloth which is in contact with the ground. And
The waterproof sheet wound in a roll is disengaged, and the cushioning surface of the waterproof sheet is brought into contact with the ground side. At the same time, the side edge of the buffer cloth of the waterproof sheet and the mounting piece are ground Side, and is continuously applied in the cross direction of the inner wall surface 20a of the tunnel 20, and is extended. Thereby, the spring water leaching from the ground 21 of the tunnel 20 is collected and drained at the bottom of the tunnel 20.
【００１２】[0012]
【実施例】始めに、本発明及び参考例の防水シート１
１，３１，４１を、トンネルの坑道内壁面２０ａに展張
させる展張装置２５について説明する。この展張装置２
５は、図１に示すように、トンネル掘穿坑道２０の地山
２１表面に一次覆工コンクリート２２が吹きつけられた
後の、坑道２０内に枠組みされた作業架台２６に、この
坑道２０の内壁面２０ａの横断方向に沿って配設される
湾曲形成したガイドレール２７上を移動するようになっ
ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a waterproof sheet 1 of the present invention and a reference example
The expansion device 25 for expanding 1, 31, 41 on the inner wall surface 20a of the tunnel will be described. This expansion device 2
As shown in FIG. 1, as shown in FIG. 1, after the primary lining concrete 22 has been sprayed on the surface of the ground 21 of the tunnel excavation road 20, the work platform 26 framed in the tunnel 20 It moves on a curved guide rail 27 which is disposed along the transverse direction of the inner wall surface 20a.
【００１３】そして、この展張装置２５は、ロール状に
巻回された防水シート１１，３１，４１が載置され、こ
のロール状の防水シート１１，３１，４１を所定ピッチ
で解反させるとともに、前記ガイドレール２７上を移動
し、かつ解反させた防水シート１１，３１，４１を図４
に示すように緩衝布３側を表面とするように一対のアー
ム２８で伸長させ支持し、坑道２０の内壁面２０ａなど
の被展張部分に、アーム２８間に配設された押さえロー
ラ２９にてこの防水シート１１，３１，４１の緩衝布３
面を当接させるようになっている。なお、この展張装置
２５には、作業者が搭乗する作業台３０が付設されてい
る。In the stretching device 25, the waterproof sheets 11, 31, 41 wound in a roll shape are placed, and the roll-shaped waterproof sheets 11, 31, 41 are disengaged at a predetermined pitch. The waterproof sheets 11, 31, 41 moved on the guide rail 27 and disengaged are shown in FIG.
As shown in FIG. 3, the pair of arms 28 are extended and supported so that the cushioning cloth 3 side is the surface. The cushioning cloth 3 of the waterproof sheets 11, 31, 41
The surfaces come into contact. In addition, a work table 30 on which an operator rides is attached to the extension device 25.
【００１４】次に、第１の参考例の防水シート１１につ
いて説明する。図２は、本参考例の防水シートを示す平
面図、図３は同防水シートの概略縦断面図である。この
防水シート１１は、図２及び図３に示すように遮水シー
ト１２と、緩衝布１３と、取付片１４とで構成されてい
る。Next, the waterproof sheet 11 of the first reference example will be described. FIG. 2 is a plan view showing the waterproof sheet of the present reference example, and FIG. 3 is a schematic longitudinal sectional view of the waterproof sheet. As shown in FIGS. 2 and 3, the waterproof sheet 11 includes a waterproof sheet 12, a cushioning cloth 13, and a mounting piece 14.
【００１５】遮水シート１２は、ポリエチレン，ポリプ
ロピレン，ポリ塩化ビニル，エチレン・酢酸ビニル共重
合体，等の軟質な熱可塑性樹脂や、エラストマー等の軟
質な合成ゴムなどを素材とし、幅広の帯状に形成されて
いる。The water-blocking sheet 12 is made of a soft thermoplastic resin such as polyethylene, polypropylene, polyvinyl chloride, ethylene-vinyl acetate copolymer or the like, or a soft synthetic rubber such as an elastomer. Is formed.
【００１６】また、緩衝布１３は、不織布や、ポリエチ
レンやポリプロピレンの生地にループを織り込んだ起毛
布等の通水性を有した材質である。The cushioning cloth 13 is made of a material having water permeability, such as a nonwoven fabric or a raised cloth in which loops are woven in a cloth of polyethylene or polypropylene.
【００１７】さらに、取付片１４は前記緩衝布１３と同
様の不織布等より形成され、略矩形状の片状に成形され
ている。Further, the mounting piece 14 is formed of a non-woven fabric or the like similar to the cushioning cloth 13, and is formed into a substantially rectangular piece.
【００１８】そして、前記遮水シート１２の地山対接面
となる一方の面１２ａに、前記緩衝布１３が重複形成さ
れるが、図３に示すように、緩衝布１３は遮水シート１
２への接着箇所間が弛むように設定され、点接着や線接
着によって間欠的に複数の中間箇所が接着されている。Then, the buffer cloth 13 is formed so as to overlap on one surface 12a of the water-blocking sheet 12 which is in contact with the ground, but as shown in FIG.
2 are set so as to be loosened, and a plurality of intermediate portions are intermittently bonded by point bonding or line bonding.
【００１９】また、前記緩衝布１３の地山対接面となる
一方の面３ａには、複数の取付片１４が縫着などにより
取り付けられている。複数の取付片１４は、緩衝布１３
の長さ方向に所定間隔毎となるように、前記緩衝布１３
のみに縫着によって取り付けられている。A plurality of attachment pieces 14 are attached to one surface 3a of the cushioning cloth 13 which is to be in contact with the ground by sewing or the like. The plurality of mounting pieces 14 are
The cushioning cloth 13 is arranged at predetermined intervals in the length direction.
Only attached by sewing.
【００２０】この参考例の防水シート１１の取付片１４
は、前記緩衝布１３と同様の不織布等より形成され、図
２に示すように短冊状に形成されている。The mounting piece 14 of the waterproof sheet 11 of this reference example
Is formed of a nonwoven fabric or the like similar to the cushioning cloth 13, and is formed in a strip shape as shown in FIG.
【００２１】各取付小片４は、緩衝布１３の幅方向の略
中央に、この幅方向を長辺の方向とし、この長辺の一方
の辺である一方の縁部、本実施例では図４に示すように
前記展張装置２５によってこの防水シート１１を坑道２
０の内壁面２０ａに展張する際の被展張側となる押さえ
ローラ２９側、を縫着によって取り付けられている。す
なわち、一方の長辺を固定される縫着部分（縫い目）１
４ａとし、他方の長辺は自由端縁１４ｂとなる略翼状と
なるように取り付けられている。Each of the mounting pieces 4 is located substantially at the center of the buffer cloth 13 in the width direction, and the width direction is the direction of the long side. One of the long sides, one edge of the long side, in this embodiment, FIG. As shown in FIG.
The pressing roller 29 side, which is on the side to be extended when it is extended on the inner wall surface 20a, is attached by sewing. That is, the sewn portion (seam) 1 to which one long side is fixed
4a, and the other long side is attached so as to be substantially wing-shaped to be a free edge 14b.
【００２２】なお、この防水シート１１の両側縁部分
は、遮水シート１２と緩衝布１３とが接着されておら
ず、遊離状態となっており、緩衝布１３の両側は取付縁
部１５となっている。The both sides of the waterproof sheet 11 are separated from each other because the waterproof sheet 12 and the cushioning cloth 13 are not adhered to each other, and both sides of the cushioning cloth 13 serve as mounting edges 15. ing.
【００２３】次に、上記のように構成された第１の参考
例の防水シート１１のトンネル掘穿坑道２０への展張の
方法について説明する。まず、上述した防水シート１１
は、地山２１側と対接する面、すなわち緩衝布１３側を
地山側となるようにロール状に巻回される。そして、こ
のロール状の防水シート１１を、展張装置２５に載置す
るとともに、先端が押さえローラ２９に掛けられ、展張
が開始される。Next, a method of extending the waterproof sheet 11 of the first embodiment configured as described above on the tunnel excavation road 20 will be described. First, the above-described waterproof sheet 11
Is wound in a roll shape so that the surface in contact with the ground 21 side, that is, the buffer cloth 13 side is the ground side. Then, the roll-shaped waterproof sheet 11 is placed on the spreading device 25 and the leading end is hung on the pressing roller 29 to start spreading.
【００２４】展張が開始されると、展張装置２５はロー
ル状の防水シート１１を解反させるとともに、この防水
シート１１の緩衝布１３面側を押さえローラ２９で地山
２１側に当接させる。このとき、押さえローラ２９の位
置で、取付片１４の縫い目１４ａ部分が先に当接するこ
とから、この取付片１４の自由端縁部分１４ｂが、図４
に示すように、緩衝布１３面より浮き上がり、この緩衝
布１３と取付片１４との間にてこの取付片１４を、図５
に示すように、作業台３０上の作業者が地山２１側へ釘
７等で固定させる。また、同時に、作業台３０上の作業
者は、地山２１側に当接される防水シート１１の緩衝布
１３の両側の取付縁部１５を地山側へ釘６等で固定す
る。（図６参照）When the stretching is started, the stretching device 25 releases the roll-shaped waterproof sheet 11, and makes the surface of the cushioning cloth 13 of the waterproof sheet 11 abut on the ground 21 side by the pressing roller 29. At this time, at the position of the pressing roller 29, the seam 14a of the mounting piece 14 comes into contact first, so that the free edge portion 14b of the mounting piece 14 is
As shown in FIG. 5, the mounting piece 14 is lifted up from the surface of the cushioning cloth 13, and the mounting piece 14 is
As shown in (1), an operator on the work table 30 fixes it to the ground 21 side with a nail 7 or the like. At the same time, the worker on the work table 30 fixes the mounting edges 15 on both sides of the cushioning cloth 13 of the waterproof sheet 11 abutting on the ground 21 side to the ground side with nails 6 or the like. (See Fig. 6)
【００２５】そして、展張装置２５は、防水シート１１
を所定ピッチ毎繰り出すとともに、ガイドレール２７上
をこのピッチに合わせて坑道２０の横断方向に移動し、
作業者は順次この防水シート１１の取付片１４、および
両側縁部分の取付縁部１５を釘６等で地山２１側へ固定
する。The stretching device 25 is connected to the waterproof sheet 11.
At a predetermined pitch, and moves on the guide rail 27 in the transverse direction of the tunnel 20 in accordance with the pitch,
The operator sequentially fixes the mounting pieces 14 of the waterproof sheet 11 and the mounting edges 15 on both side edges to the ground 21 with nails 6 or the like.
【００２６】従ってこのように構成された第１の参考例
の防水シート１１では、地山対接面に翼状の取付片１４
が設けられたことにより、地山２１側への固定が防水シ
ート１１の両側（取付縁部１５）だけでなく、その中間
部分においても固定されるので、防水シート１１は展張
された状態で必要以上に弛むことなく地山２１側に固定
され、展張後の二次覆工コンクリート打設時に支障を来
すことがない。Therefore, in the waterproof sheet 11 of the first reference example thus configured, the wing-shaped mounting piece 14
Is provided, fixing to the ground 21 side is performed not only on both sides (the mounting edge 15) of the waterproof sheet 11 but also at an intermediate portion thereof, so that the waterproof sheet 11 is required in an expanded state. It is fixed to the ground 21 side without loosening as described above, and does not hinder the casting of the secondary lining concrete after the spreading.
【００２７】また、前述したように防水シート１１に翼
状の取付片１４が設けられていることで、展張時にこの
取付片１４が浮き上がり、地山２１側への固定作業が行
いやすくなっている。Further, since the wing-shaped mounting pieces 14 are provided on the waterproof sheet 11 as described above, the mounting pieces 14 are lifted up at the time of expansion, so that the fixing work to the ground 21 can be easily performed.
【００２８】なお、上記参考例では、取付片１４を短冊
状に形成して緩衝布１３の幅方向の略中央に縫着した例
について述べたが、図７の参考例では、短尺な短冊状に
形成し、所定間隔をあけて並設させるとともに、緩衝布
１３の長手方向に間隔をあけて複数配設させる構成とし
ており、また、図８の参考例では、取付片１４を千鳥状
に交互に配設している。In the above-described reference example, an example in which the mounting piece 14 is formed in a strip shape and sewn at substantially the center in the width direction of the cushioning cloth 13 has been described. However, in the reference example of FIG. 8 and are arranged side by side at predetermined intervals, and a plurality of them are arranged at intervals in the longitudinal direction of the buffer cloth 13. In the reference example of FIG. 8, the mounting pieces 14 are alternately arranged in a staggered manner. It is arranged in.
【００２９】次に、第２の参考例の防水シート３１につ
いて説明する。この参考例の防水シート３１は、前述し
た第１の参考例の防水シート１１と同様の構成及び形状
の遮水シート３２、及び緩衝布３３と、取付片３４とで
構成されている。なお、この第２の参考例の防水シート
３１を構成する遮水シート３２、及び緩衝布３３は、前
述した第１の実施例と同様の構成及び形状なので説明を
省略する。Next, a waterproof sheet 31 according to a second reference example will be described. The waterproof sheet 31 of this reference example includes a waterproof sheet 32 and a cushioning cloth 33 having the same configuration and shape as the waterproof sheet 11 of the first reference example, and a mounting piece 34. The waterproof sheet 32 and the cushioning cloth 33 constituting the waterproof sheet 31 of the second reference example are similar in configuration and shape to those of the above-described first embodiment, and thus description thereof is omitted.
【００３０】この第２の参考例の防水シート３１の取付
片３４は、前記緩衝布３３と同様の不織布等より形成さ
れ、図９に示すように、前記第１の参考例の取付片１４
より長尺な帯状形状に形成されている。The attachment piece 34 of the waterproof sheet 31 of the second reference example is formed of the same nonwoven fabric as the cushioning cloth 33, and as shown in FIG. 9, the attachment piece 14 of the first reference example.
It is formed in a longer strip shape.
【００３１】そして、前述した第１の参考例と同様に、
図１０に示すように、前記遮水シート３２の地山対接面
となる一方の面３２ａに、前記緩衝布３３が点接着や線
接着によって間欠的に複数の中間箇所が接着され、重複
形成されるとともに、前記緩衝布３３の地山対接面とな
る一方の面３３ａに複数の取付片３４が図９に示すよう
に、緩衝布３３の長さ方向に所定間隔毎となるように、
前記緩衝布３３のみに縫着によって取り付けられてい
る。Then, similarly to the above-mentioned first reference example,
As shown in FIG. 10, the buffer cloth 33 is intermittently adhered to one surface 32a of the water impermeable sheet 32 which is to be in contact with the ground by point adhesion or line adhesion to form an overlap. At the same time, as shown in FIG. 9, a plurality of mounting pieces 34 are provided at predetermined intervals in the length direction of the cushioning cloth 33 on one surface 33 a of the cushioning cloth 33 serving as the ground contact surface.
It is attached to only the buffer cloth 33 by sewing.
【００３２】各取付片３４は、緩衝布３３の幅方向、す
なわち、この緩衝布３３の長手方向と直交する方向を長
辺の方向とし、この長辺の一方の辺である一方の縁部、
本実施例では図１１に示すように前記展張装置２５によ
ってこの防水シート３１を坑道２０の内壁面２０ａに展
張する際の被展張側となる押さえローラ２９側、を縫着
によって取り付けられている。すなわち、一方の長辺を
固定される縫着部分（縫い目）３４ａとし、他方の長辺
を自由端縁３４ｂとなるように取り付けられている。Each of the mounting pieces 34 has a long side in a width direction of the cushioning cloth 33, that is, a direction orthogonal to the longitudinal direction of the cushioning cloth 33.
In this embodiment, as shown in FIG. 11, the pressing device 29, which is the side to be spread when the waterproof sheet 31 is spread on the inner wall surface 20 a of the tunnel 20, is attached by sewing by the spreading device 25. That is, one long side is fixed as a sewn portion (seam) 34a, and the other long side is a free edge 34b.
【００３３】なお、この防水シート３１の両側縁部分
は、前記第１の参考例と同様に遮水シート３２と緩衝布
３３とが接着されておらず、遊離状態となっており、緩
衝布３３の両側は取付縁部３５となっている。Note that, as in the first embodiment, the waterproof sheet 32 and the buffer cloth 33 are not adhered to each other, and the waterproof sheet 31 is in a free state. On both sides are mounting edges 35.
【００３４】次に、上記のように構成された第２の参考
例の防水シート３１のトンネル掘穿坑道２０への展張の
方法について説明する。防水シート３１は、地山２１側
と対接する面となる緩衝布３３側を地山側となるように
ロール状に巻回され、このロール状の防水シート３１
を、前記第２の実施例と同様に、展張装置２５に載置す
るとともに、シート先端が押さえローラ２９に掛けら
れ、展張が開始される。Next, a method for extending the waterproof sheet 31 of the second embodiment constructed as described above on the tunnel excavation road 20 will be described. The waterproof sheet 31 is wound in a roll shape such that the cushioning cloth 33 side, which is the surface in contact with the ground 21 side, is on the ground side.
Is placed on the stretching device 25 as in the second embodiment, and the leading end of the sheet is hung on the pressing roller 29 to start stretching.
【００３５】展張が開始されると、展張装置２５はロー
ル状の防水シート３１を解反させるとともに、この防水
シート３１の緩衝布３３面側を押さえローラ２９で地山
２１側に当接させる。このとき、押さえローラ２９の位
置で、取付片３４の縫い目３４ａ部分が先に当接するこ
とから、この取付片３４の自由端縁部分３４ｂが、前記
第１の実施例と同様に図１１に示すように、緩衝布３３
面より浮き上がり、この緩衝布３３と取付片３４との間
にてこの取付片３４を、作業台３０上の作業者が地山２
１側へ釘７等で固定させる。この固定の際、取付片３４
を直に釘７等にて地山２１側に固定させてもよいが、図
１２に示すように、この取付片３４の上から帯状に形成
された押さえ板３６にて押さえ、この押さえ板３６を介
して地山２１側へ固定させる。また、同時に、作業台３
０上の作業者は、地山２１側に当接される防水シート３
１の緩衝布３３の両側の取付縁部３５を地山側へ釘６等
で固定する。When the expansion is started, the expansion device 25 releases the roll-shaped waterproof sheet 31, and makes the surface of the buffer cloth 33 of the waterproof sheet 31 abut against the ground 21 side by the pressing roller 29. At this time, at the position of the pressing roller 29, the seam 34a of the attachment piece 34 comes into contact first, so that the free edge portion 34b of the attachment piece 34 is shown in FIG. 11 similarly to the first embodiment. As shown, the cushioning cloth 33
Surface of the buffer cloth 33 and the mounting piece 34, and the worker on the work table 30 holds the mounting piece 34
It is fixed to one side with a nail 7 or the like. At the time of this fixing, the mounting piece 34
May be directly fixed to the ground 21 side with a nail 7 or the like, but as shown in FIG. 12, a pressing plate 36 formed in a band shape from above the mounting piece 34, and the pressing plate 36 And is fixed to the ground 21 side. At the same time, the work table 3
The worker on the waterproof sheet 3 is brought into contact with the ground 21 side.
The mounting edges 35 on both sides of the cushioning cloth 33 are fixed to the ground side with nails 6 or the like.
【００３６】そして、展張装置２５は、防水シート３１
を所定ピッチ毎繰り出すとともに、ガイドレール２７上
をこのピッチに合わせて坑道２０の横断方向に移動し、
作業者は順次この防水シート３１の取付片３４、および
両側縁部分の取付縁部３５を釘６等で地山２１側へ固定
する（図１３参照）。The spreading device 25 is provided with a waterproof sheet 31.
At a predetermined pitch, and moves on the guide rail 27 in the transverse direction of the tunnel 20 in accordance with the pitch,
The operator sequentially fixes the mounting piece 34 of the waterproof sheet 31 and the mounting edges 35 at both side edges to the ground 21 with nails 6 or the like (see FIG. 13).
【００３７】従ってこのように構成された第２の参考例
の防水シート３１では、地山対接面に取付片３４が設け
られたことにより、地山２１側への固定が防水シート３
１の長さ方向の両側（取付縁部３５）だけでなく、その
幅方向においても所定間隔毎に固定されるので、防水シ
ート３１は展張された状態で弛むことなく地山２１側に
固定され、展張後の二次覆工コンクリート打設時に支障
を来すことがない。Therefore, in the waterproof sheet 31 of the second reference example configured as described above, since the mounting piece 34 is provided on the ground contact surface, the waterproof sheet 3 can be fixed to the ground 21 side.
Since the waterproof sheet 31 is fixed at predetermined intervals not only on both sides (mounting edge 35) in the length direction but also in the width direction thereof, the waterproof sheet 31 is fixed to the ground 21 side without loosening in an extended state. There is no hindrance when placing secondary lining concrete after spreading.
【００３８】また、前述したように防水シート３１に長
尺の取付片３４が設けられていることで、展張装置２５
による展張時に、この取付片３４が緩衝布３３面から浮
き上がり、地山２１側への固定作業が極めて行いやすく
なっている。Further, as described above, since the waterproof sheet 31 is provided with the long mounting piece 34, the stretching device 25 is provided.
At the time of the expansion, the mounting piece 34 rises from the surface of the cushioning cloth 33, and the fixing operation to the ground 21 side is extremely easily performed.
【００３９】上記参考例では、取付片３４をその長辺が
緩衝布３３の幅方向に直交して縫着された例について述
べたが、図１４の本発明の実施例では、取付片３４の長
手方向（長辺）を緩衝布３３の幅方向に対しやや斜めと
なるように取り付けた構成としている。この場合、展張
装置２５による展張時に取付片３４がその長手方向の端
部から順次起き上がるので地山側への固定がさらに容易
になる。In the above reference example, an example was described in which the long side of the mounting piece 34 was sewn perpendicular to the width direction of the cushioning cloth 33. However, in the embodiment of the present invention shown in FIG. The structure is such that the longitudinal direction (long side) is slightly oblique to the width direction of the buffer cloth 33. In this case, the mounting pieces 34 are sequentially raised from the ends in the longitudinal direction at the time of expansion by the expansion device 25, so that the fixing to the ground side is further facilitated.
【００４０】次に、図１５の実施例の防水シート４１に
ついて説明する。この防水シート４１は、前述した第２
の参考例の防水シート３１と同様に、遮水シート４２と
緩衝布４３と取付片４４とで構成されている。Next, the waterproof sheet 41 of the embodiment shown in FIG. 15 will be described. This waterproof sheet 41 is the same as the second sheet described above.
As in the case of the waterproof sheet 31 of the reference example, a waterproof sheet 42, a cushioning cloth 43, and a mounting piece 44 are provided.
【００４１】なお、この実施例の各構成部分である遮水
シート４２，緩衝布４３は前述した第１、第２の各参考
例と同様の構成及び形状なので説明を省略する。The water-impervious sheet 42 and the cushioning cloth 43, which are the respective components of this embodiment, have the same configuration and shape as those of the first and second reference examples, and will not be described.
【００４２】この防水シート４１の取付片４４は、緩衝
布４３と同様の不織布等より形成され、前記第２の参考
例の取付片３４と略同形状の長尺な帯状形状に形成され
て、図１５に示すようにトンネル掘穿坑道２０の天井部
分すなわち上部内壁面４５に当接される部分の前記取付
片の取付間隔は、坑道２０の側面すなわち下部内壁面４
６に当接される部分の前記取付片の取付間隔より小さく
なるように、緩衝布４３のみに縫着によって取り付けら
れている。The attachment piece 44 of the waterproof sheet 41 is formed of a nonwoven fabric or the like similar to the cushioning cloth 43, and is formed in a long strip shape having substantially the same shape as the attachment piece 34 of the second reference example. As shown in FIG. 15, the mounting interval of the mounting pieces at the ceiling portion of the tunnel excavation road 20, that is, the portion that comes into contact with the upper inner wall surface 45, is determined by the side surface of the tunnel 20, ie, the lower inner wall surface 4.
6 is attached to only the buffer cloth 43 by sewing so as to be smaller than the attachment interval of the attachment piece in the portion that comes into contact with 6.
【００４３】そして、遮水シート４２の地山対接面とな
る一方の面４２ａに、緩衝布４３が点接着や線接着によ
って間欠的に複数の中間箇所が接着され、重複形成され
ている（図１０参照）。Then, the buffer cloth 43 is intermittently adhered to one surface 42a of the water impermeable sheet 42 which is to be in contact with the ground by point bonding or line bonding, and is formed in an overlapping manner ( (See FIG. 10).
【００４４】上記の実施例では、弛みやすいトンネル掘
穿坑道の上部内壁面４５に当接着される部分の前記取付
片の取付間隔が密になっているので、防水シート４１を
確実に地山へ固定でき、二次覆工コンクリートの打設時
に支障を来すことがない。In the above embodiment, since the mounting interval of the mounting pieces at the portion which is adhered to the upper inner wall surface 45 of the tunnel excavation road, which is easy to loosen, is tight, the waterproof sheet 41 can be securely transferred to the ground. It can be fixed and does not hinder the casting of secondary lining concrete.
【００４５】[0045]
【発明の効果】以上説明したように本発明による防水シ
ートでは、地山側への固定が防水シートの両側だけでな
く、中央部分においても固定されるので、防水シートは
展張された状態で必要以上に弛むことなく地山側に固定
され、展張後の二次覆工コンクリート打設時に支障を来
すことがないという効果がある。As described above, in the waterproof sheet according to the present invention, the waterproof sheet is fixed not only on both sides of the waterproof sheet but also on the central portion thereof. It is fixed to the ground without sagging, and has the effect of not hindering the placing of secondary lining concrete after spreading.
【００４６】また、防水シートに設けられている取付片
が、展張装置による展張時に浮き上がるという効果があ
り、これにより地山側への固定作業が容易に行えるとい
う効果がある。Further, there is an effect that the attachment piece provided on the waterproof sheet is lifted up at the time of expansion by the expansion device, and thereby there is an effect that the fixing work on the ground side can be easily performed.
【００４７】また、シートの地山対接面に長尺の取付片
が幅方向に設けられたことにより、地山側への固定が防
水シートの両側だけでなく、その幅方向においても所定
間隔毎に固定されるので、防水シートは展張された状態
で弛むことなく坑道の内壁面に展張固定され、展張後の
二次覆工コンクリート打設時に支障を来すことがないと
いう効果がある。Further, since the long mounting pieces are provided in the width direction on the ground contact surface of the sheet, the waterproof sheet can be fixed not only on both sides of the waterproof sheet but also at predetermined intervals in the width direction. Therefore, the waterproof sheet is stretched and fixed to the inner wall surface of the tunnel without being slackened in the stretched state, so that there is an effect that there is no trouble in placing the secondary lining concrete after the spread.
【００４８】また、取付片が、展張装置による展張時に
地山対接面より確実に浮き上がるという効果があり、こ
れにより地山側への固定作業が極めて容易に行えるとい
う効果がある。本発明では、取付片の長手方向（長辺）
を緩衝布の幅方向に対しやや斜めとなるように取り付け
た構成としており、展張装置による展張時に取付片がそ
の長手方向の端部から順次起き上がるので地山側への固
定がさらに容易になる。Further, there is an effect that the mounting piece is surely lifted from the ground contact surface when the mounting piece is extended by the extension device, so that the fixing work on the ground side can be performed very easily. In the present invention, in the longitudinal direction (long side) of the mounting piece
Are mounted so as to be slightly oblique with respect to the width direction of the cushioning cloth. Since the mounting pieces are sequentially raised from the longitudinal ends at the time of expansion by the expansion device, the fixing to the ground side is further facilitated.
【００４９】さらに、弛みやすいトンネル掘穿坑道の上
部内壁面に当接着される部分の前記取付片の取付間隔を
密にすることにより、地山側の内壁面が、平滑な面では
なく凹凸の多い面であっても防水シートを確実に地山へ
固定できる。Further, by narrowing the mounting interval of the mounting pieces in a portion which is adhered to the upper inner wall surface of the tunnel excavation road which is easy to loosen, the inner wall surface on the ground side is not smooth but has many irregularities. Even on a surface, the waterproof sheet can be securely fixed to the ground.
【図１】本発明の防水シートの展張時に使用される展張
装置の概略側面図FIG. 1 is a schematic side view of a spreading device used when spreading a waterproof sheet of the present invention.
【図２】本発明による第１の参考例の防水シートの平面
図FIG. 2 is a plan view of a waterproof sheet according to a first reference example of the present invention.
【図３】同参考例による防水シートの縦断面図FIG. 3 is a longitudinal sectional view of a waterproof sheet according to the reference example.
【図４】同展張装置の要部の縦断面図FIG. 4 is a longitudinal sectional view of a main part of the stretching device.
【図５】同参考例による防水シートの取付状態を示す縦
断面図FIG. 5 is a vertical cross-sectional view showing a mounting state of the waterproof sheet according to the reference example.
【図６】同参考例による防水シートの取付状態を示す横
断面図FIG. 6 is a cross-sectional view showing a mounting state of the waterproof sheet according to the reference example.
【図７】他の参考例の防水シートを示す平面図FIG. 7 is a plan view showing a waterproof sheet of another reference example.
【図８】他の参考例の防水シートを示す平面図FIG. 8 is a plan view showing a waterproof sheet of another reference example.
【図９】本発明による第２の参考例の防水シートを示す
平面図FIG. 9 is a plan view showing a second embodiment of the waterproof sheet according to the present invention.
【図１０】同参考例の防水シートの縦断面図FIG. 10 is a longitudinal sectional view of the waterproof sheet of the reference example.
【図１１】同参考例による防水シートの展張時の概略側
面図FIG. 11 is a schematic side view when the waterproof sheet according to the reference example is spread.
【図１２】同参考例による展張装置の防水シート展張時
の一部省略斜視図FIG. 12 is a partially omitted perspective view of the spreading device according to the reference example when the waterproof sheet is spread.
【図１３】同参考例による防水シートの取付状態を示す
縦断面図FIG. 13 is a vertical cross-sectional view showing a mounted state of the waterproof sheet according to the reference example.
【図１４】本発明による実施例の防水シートを示す平面
図FIG. 14 is a plan view showing a waterproof sheet according to an embodiment of the present invention.
【図１５】本発明による実施例の防水シートの取付状態
を示すトンネル掘穿坑道の断面図FIG. 15 is a sectional view of a tunnel excavation road showing a mounting state of a waterproof sheet according to an embodiment of the present invention.
１１，３１，４１…防水シート １２，３２，４２…遮水シート １２ａ，３２ａ，４２ａ…地山対接面（一方の面） １３，３３，４３…緩衝布 １３ａ，３３ａ…地山対接面（一方の面） １４，３４，４４…取付片 ２０…坑道 ２０ａ…内壁面 ２１…地山 ２５…展張装置 ２９…押さえローラ ３６…押さえ板 ４５…上部内壁面 ４６…下部内壁面 11, 31, 41: Waterproof sheet 12, 32, 42: Waterproof sheet 12a, 32a, 42a: Ground contact surface (one surface) 13, 33, 43: Buffer cloth 13a, 33a: Ground contact surface (One surface) 14, 34, 44 mounting piece 20 mine tunnel 20a inner wall surface 21 ground surface 25 expanding device 29 pressing roller 36 pressing plate 45 upper inner wall surface 46 lower inner wall surface
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−330199（ＪＰ，Ａ) 実開 昭61−58299（ＪＰ，Ｕ) 実開 昭57−33796（ＪＰ，Ｕ) 実公 昭63−9680（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) E21D 11/38 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-330199 (JP, A) JP-A 61-58299 (JP, U) JP-A 57-33796 (JP, U) 9680 (JP, Y2) (58) Fields investigated (Int. Cl. 7 , DB name) E21D 11/38
Claims (3)
該坑道の地山側から浸出する湧水を前記坑道の底部に集
排水させる防水シートにおいて、 遮水シートの地山対接面に、通水性を有する緩衝布が、
中間の複数の箇所が接着されて重複形成されているとと
もに、前記緩衝布の前記地山に対接する面に、緩衝布の
長さ方向に所定間隔となるように、複数の取付片を、緩
衝布の幅方向に取り付け配設し、前記各取付片は、その
長辺を前記緩衝布の幅方向に対しやや斜めとなるように
取り付けた構成としたことを特徴とする防水シート。Claims: 1. An inner wall of a tunnel excavation road,
In a waterproof sheet for collecting and draining spring water leached from the ground side of the tunnel at the bottom of the tunnel, a water-permeable buffer cloth is provided on the ground-facing surface of the waterproof sheet,
A plurality of mounting pieces are buffered so that a plurality of intermediate portions are adhered and overlapped, and a plurality of mounting pieces are formed on a surface of the buffer cloth facing the ground so as to have a predetermined interval in a length direction of the buffer cloth. It is mounted and arranged in the width direction of the cloth, and each of the mounting pieces is
So that the long side is slightly oblique to the width direction of the cushioning cloth
A waterproof sheet characterized by being attached .
記緩衝布の幅方向に沿って逢着する逢着部分とし、他方
の長辺を緩衝布の面より浮き上がる自由端縁部分とした
ことを特徴とする請求項１記載の防水シート。2. The mounting piece according to claim 1, wherein one of the long sides is an attachment part to be attached along the width direction of the buffer cloth, and the other long side is a free edge part floating above the surface of the buffer cloth. The waterproof sheet according to claim 1, wherein:
れる部分の前記取付片の取付間隔は、下部内壁面に当接
される部分の前記取付片の取付間隔より小さいことを特
徴とする請求項１又は２記載の防水シート。3. A mounting interval of the mounting pieces in a portion abutting on an upper inner wall surface of a tunnel excavation road is smaller than an mounting interval of the mounting pieces on a portion abutting on a lower inner wall surface. The waterproof sheet according to claim 1 or 2, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13605993A JP3284426B2 (en) | 1993-02-17 | 1993-06-07 | Tarpaulin |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2818193 | 1993-02-17 | ||
| JP5-28181 | 1993-02-17 | ||
| JP13605993A JP3284426B2 (en) | 1993-02-17 | 1993-06-07 | Tarpaulin |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001353148A Division JP3607244B2 (en) | 1993-02-17 | 2001-11-19 | How to spread tarpaulin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06299797A JPH06299797A (en) | 1994-10-25 |
| JP3284426B2 true JP3284426B2 (en) | 2002-05-20 |
Family
ID=26366222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13605993A Expired - Lifetime JP3284426B2 (en) | 1993-02-17 | 1993-06-07 | Tarpaulin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3284426B2 (en) |
-
1993
- 1993-06-07 JP JP13605993A patent/JP3284426B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06299797A (en) | 1994-10-25 |
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