JPS6340556Y2 - - Google Patents
Info
- Publication number
- JPS6340556Y2 JPS6340556Y2 JP1982163911U JP16391182U JPS6340556Y2 JP S6340556 Y2 JPS6340556 Y2 JP S6340556Y2 JP 1982163911 U JP1982163911 U JP 1982163911U JP 16391182 U JP16391182 U JP 16391182U JP S6340556 Y2 JPS6340556 Y2 JP S6340556Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- sheet
- stop sheet
- permeable fabric
- permeable
- 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
Links
- 239000004744 fabric Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Laminated Bodies (AREA)
Description
【考案の詳細な説明】
この考案は、トンネル掘穿坑道の地山からの湧
水を坑道の側底に集排水するためのトンネル工事
用止水シートに関するものである。[Detailed Description of the Invention] This invention relates to a water-stop sheet for tunnel construction, which collects and drains spring water from the ground of a tunnel excavation shaft into the side bottom of the tunnel.
ナトム工法によつて掘穿されるトンネル坑道に
おいては、第１図に示すように、岩盤１に１次コ
ンクリート２が吹付けられてなる坑道３の地山
に、上記集排水用の止水シートＳを展張させた上
で、２次覆工コンクリート４の打設工事を行うよ
うにしていて、これにより、覆工コンクリート４
からの漏水及びクラックを防止する方策が採られ
ている。 In tunnels excavated by the Natom construction method, as shown in Figure 1, the water stop sheet for water collection and drainage is placed on the ground of the tunnel 3, which is made by spraying primary concrete 2 onto bedrock 1. After expanding S, the secondary lining concrete 4 is placed, and as a result, the lining concrete 4
Measures are taken to prevent water leakage and cracks.
このため止水シートの特性には、(a)地山の凹凸
に良く馴染むための十分な伸張性を持つて、地山
との間に悪影響を及ぼす空〓を生じないこと、(b)
シート面に沿う通水性が良好であつて、目詰りを
生じないこと、(c)コンクリートの充填圧等によつ
てシートに破損が生じないこと、等が要求され
る。 For this reason, the characteristics of a water-stop sheet are (a) to have sufficient extensibility to fit well into the irregularities of the ground, and to not create any negative effects between it and the ground; (b)
It is required that water permeability along the sheet surface is good and clogging does not occur, and (c) that the sheet is not damaged by concrete filling pressure, etc.
ところで、従来の止水シートの構造には、不識
布積層方式の構造が知られていて、この方式で
は、第２図に示すように、軟質合成樹脂シートよ
り成る伸張性の良好な遮水シート５と、通水性を
有する不織布６との積層によつて止水シート７が
形成されている。 By the way, the structure of the conventional water-stop sheet is known to be the structure of laminated cloth, and in this method, as shown in Figure 2, a water-stop sheet with good stretchability made of a soft synthetic resin sheet is used. A water stop sheet 7 is formed by laminating the sheet 5 and a water-permeable nonwoven fabric 6.
しかし、このような従来の止水シート７による
と、不織布６の強度が高くて伸びが悪いために、
遮水シート５の伸張率が高いにも拘らず、止水シ
ート７に伸びが無く、その結果、第３図に示すよ
うに、地山との間に空隙８が生じてコンクリート
４の充填性を害し、あるいは、伸びないままで充
填圧によつて止水シート７が破断するＯスパン破
断現象が生じる不具合があつた。 However, according to such a conventional water stop sheet 7, since the strength of the nonwoven fabric 6 is high and the elongation is slow,
Despite the high elongation rate of the water-blocking sheet 5, the water-blocking sheet 7 does not stretch, and as a result, as shown in FIG. There have been problems in which O-span rupture occurs, in which the water stop sheet 7 is damaged by the filling pressure without elongating.
本考案は、上記不具合を解消するためになされ
たものであつて、すなわち、本考案の目的は、地
山の凹凸に対する追従性が良好で、下地に十分に
馴染み得るようにしたトンネル工事用止水シート
を提供することにある。 The present invention was devised in order to eliminate the above-mentioned problems, and the purpose of the present invention is to provide a stopper for tunnel construction that has good ability to follow the irregularities of the ground and is able to fully adapt to the groundwork. Our goal is to provide water sheets.
その目的を達成する手段として、本考案の止水
シートは、遮水シートを本体と成し、かつ同遮水
シートの地山対接面には、通水性布地が点接着ま
たは線接着により多数の中間箇所が接着されて重
複形成されており、上記通水性布地は、その上記
各接着箇所の長さが、夫々同様箇所間の遮水シー
トの長さよりも長く形成されてたるまされた状態
で同遮水シートに重複されており、さらに上記通
水性布地は、上記遮水シートに重複した状態で通
水性布地の引張破断強度より弱い接着強度で仮止
め接着されていることを特徴としている。 As a means to achieve this purpose, the water-stop sheet of the present invention has a water-blocking sheet as its main body, and a large number of water-permeable fabrics are attached to the surface of the water-blocking sheet that is in contact with the ground by dot or line bonding. The water-permeable fabric is formed so that the length of each bonded area is longer than the length of the water-blocking sheet between the similar areas, and the water-permeable fabric is in a sagging state. The water-permeable fabric is overlapped with the water-blocking sheet, and the water-permeable fabric is temporarily bonded to the water-permeable fabric with an adhesive strength lower than the tensile strength at break of the water-permeable fabric.
以下、図示の実施例に基づいて本考案を説明す
る。 The present invention will be explained below based on the illustrated embodiments.
この止水シート９は、軟質塩化ビニール樹脂，
エチレン・酢酸ビニール共重合樹脂等の軟質合成
樹脂、または軟質ゴムからなる可焼性の遮水シー
ト１０の地山対接面に、例えば不織布などの通水
性布地１１が重複形成されたものであつて、同通
水性布地１１は、遮水シート１０への接着箇所
Ｐ，Ｌ間がたるまされた状態で、同接着箇所間の
長さが、同様箇所間の遮水シート１０の長さより
も長く、第５図に示すような点接着Ｐ、あるいは
第６図に示すような線接着Ｌによつて間欠的に多
数の中間箇所が接着されている。 This water stop sheet 9 is made of soft vinyl chloride resin,
A water-permeable fabric 11 such as a non-woven fabric is overlaid on the surface of a combustible water-blocking sheet 10 made of soft synthetic resin such as ethylene/vinyl acetate copolymer resin or soft rubber, which faces the ground. In this case, the water-permeable fabric 11 is slackened between the bonding points P and L to the water-blocking sheet 10, and the length between the bonding points is longer than the length of the water-blocking sheet 10 between the same points. , a large number of intermediate locations are intermittently bonded by point bonding P as shown in FIG. 5, or line bonding L as shown in FIG.
しかして、上記通水性布地１１は、その引張破
断強度より十分に弱い接着強度で、遮水シート１
０に仮止接着されている。 Therefore, the water-permeable fabric 11 has an adhesive strength that is sufficiently lower than the tensile breaking strength of the water-permeable fabric 11, and
It is temporarily attached to 0.
このように構成された止水シート９において
は、通水性布地１１のたるみにより遮水シート１
０が自由に伸張し得るので、地山展張時における
下地への追従性が良好である。 In the water-blocking sheet 9 configured in this way, the water-blocking sheet 1
0 can be expanded freely, so it has good followability to the base when expanding the ground.
また、覆工コンクリート４の充填圧によつて、
遮水シート１０が通水性布地１１のたるみがなく
なる迄伸張し、さらに伸張する圧力を受けた時に
は、接着箇所Ｐ，Ｌが剥離されて通水性布地１１
が遮水シート１０からづれて遊離し、これによ
り、Ｏスパン破断を起すことなしに遮水シート１
０は広い面積に亘り自由に伸張する。 Also, depending on the filling pressure of the lining concrete 4,
When the water-blocking sheet 10 is stretched until the water-permeable fabric 11 is no longer sagging and is subjected to further stretching pressure, the adhesive points P and L are peeled off and the water-permeable fabric 11
is released from the water-shielding sheet 10, and as a result, the water-shielding sheet 1 is removed without causing O-span breakage.
0 extends freely over a large area.
このように、実施例の止水シート９は自由に伸
張し得ることから、覆工コンクリート４打設時に
は、第７図に示すように、下地に良好に馴染ん
で、地山との間に空隙が生じず、その結果、確実
な打設が得られ、しかも、地山突部の角部等によ
り止水シート９が破断して漏水の生じる虞れが少
い。 In this way, since the water stop sheet 9 of the example can be freely expanded, when the lining concrete 4 is placed, it blends well into the base and leaves no gaps between it and the ground, as shown in FIG. As a result, reliable pouring can be achieved, and there is less risk of water leakage due to breakage of the water stop sheet 9 due to corners of protruding parts of the ground.
以上述べたように、本考案に係るトンネル工事
止水シート９によれば、遮水シート１０の地山対
接面に、通水性布地１１を点接着または線接着に
より遮水シート１０に対してたるませた状態で接
着させて止水シート９を構成したので、覆工コン
クリート打設時に通水性布地１１に拘束されるこ
となく遮水シート１０を自由に伸張させることが
可能になり、これにより、止水シートの破損が防
止されるほか、覆工コンクリートの充填性を確実
化させる効果がある。 As described above, according to the water-stop sheet 9 for tunnel construction according to the present invention, the water-permeable fabric 11 is bonded to the water-shielding sheet 10 by dot or line bonding on the surface of the water-shielding sheet 10 that is in contact with the ground. Since the water-stopping sheet 9 is constructed by adhering it in a slack state, it becomes possible to freely stretch the water-stopping sheet 10 without being restricted by the water-permeable fabric 11 during pouring of lining concrete. This has the effect of not only preventing damage to the water stop sheet, but also ensuring the fillability of the lining concrete.
また、通水性布地１１は、遮水シート１０に重
複した状態で、通水性布地１１の引張破断強度よ
り弱い接着強度で仮止め接着されているので、遮
水シート１０が伸張して通水性布地１１のたるみ
がなくなつた後、さらに伸張する圧力が加わつた
場合には、上記接着箇所が剥離して通水性布地１
１が遮水シート１０から分離し、遮水シート１０
が全体として十分伸張して地山の凹凸に追従す
る。従つて、伸張により通水性布地１１が破断
し、これに併い比較的狭い面積で遮水シート１０
が急激に伸張して破断し、漏水が生ずるというこ
とがない。 In addition, since the water-permeable fabric 11 is overlapped with the water-permeable sheet 10 and temporarily bonded with an adhesive strength lower than the tensile breaking strength of the water-permeable fabric 11, the water-permeable sheet 10 is stretched and the water-permeable fabric After the slack in fabric 11 is gone, if further stretching pressure is applied, the adhesive area will peel off and the water-permeable fabric 1
1 is separated from the water-shielding sheet 10, and the water-shielding sheet 10 is separated from the water-shielding sheet 10.
expands sufficiently as a whole to follow the unevenness of the ground. Therefore, the water-permeable fabric 11 breaks due to stretching, and the water-permeable sheet 10 breaks in a relatively narrow area.
There is no possibility that the material will suddenly expand and break, causing water leakage.
第１図は、トンネル掘穿坑道の断面図、第２図
は、従来の止水シートの断面図、第３図は、従来
の止水シートにおける第１図の部分Ａの拡大断面
図、第４図は、本考案の実施例を示すトンネル工
事用止水シートの断面図、第５図および第６図
は、同止水シートの部分平面図であつて、夫々接
着態様の異る図、第７図は、覆工コンクリート打
設時における実施例の止水シートの態様図で、第
３図に相当する図である。
Ｐ……点接着箇所、Ｌ……線接着箇所、２……
地山のコンクリート、３……坑道、９……止水シ
ート、１０……遮水シート、１１……通水性布
地。
Fig. 1 is a cross-sectional view of a tunnel excavation shaft, Fig. 2 is a cross-sectional view of a conventional water-stop sheet, Fig. 3 is an enlarged cross-sectional view of part A in Fig. 1 of a conventional water-stop sheet, FIG. 4 is a cross-sectional view of a water-stop sheet for tunnel construction showing an embodiment of the present invention, and FIGS. 5 and 6 are partial plan views of the same water-stop sheet, each showing a different adhesive mode. FIG. 7 is a diagram corresponding to FIG. 3, which is a view of the water-stop sheet of the embodiment at the time of pouring concrete for the lining. P...Point bonding location, L...Line bonding location, 2...
Concrete from the ground, 3... Mine shaft, 9... Water-stop sheet, 10... Water-blocking sheet, 11... Water-permeable fabric.
Claims (1)
底に集排水するための止水シートにおいて、遮水
シートを本体と成し、かつ同遮水シートの地山対
接面には、通水性布地が点接着または線接着によ
り多数の中間箇所が接着されて重複形成されてお
り、上記通水性布地は、その上記各接着箇所間の
長さが、夫々同様箇所の遮水シートの長さよりも
長く形成されてたるまされた状態で同遮水シート
に重複されており、さらに上記通水性布地は、上
記遮水シートに重複した状態で、通水性布地の引
張破断強度より弱い接着強度で仮止め接着されて
いることを特徴とするトンネル工事用止水シー
ト。 In a water-stop sheet for collecting and draining spring water from the ground of a tunnel excavation path to the side bottom of the tunnel, the main body is a water-stop sheet, and the surface of the water-stop sheet that comes into contact with the ground contains: The water-permeable fabric is formed by adhering many intermediate points by point adhesion or line adhesion to form an overlapping structure. The water-permeable fabric has an adhesive strength that is lower than the tensile breaking strength of the water-permeable fabric when it is overlapped with the water-permeable sheet. A water-stop sheet for tunnel construction, characterized by being temporarily adhesively bonded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16391182U JPS5969295U (en) | 1982-10-30 | 1982-10-30 | Water stop sheet for tunnel construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16391182U JPS5969295U (en) | 1982-10-30 | 1982-10-30 | Water stop sheet for tunnel construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5969295U JPS5969295U (en) | 1984-05-10 |
| JPS6340556Y2 true JPS6340556Y2 (en) | 1988-10-24 |
Family
ID=30359500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16391182U Granted JPS5969295U (en) | 1982-10-30 | 1982-10-30 | Water stop sheet for tunnel construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5969295U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990424U (en) * | 1982-12-10 | 1984-06-19 | 藤森工業株式会社 | waterproof sheet |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS595700B2 (en) * | 1978-03-01 | 1984-02-06 | 金井 宏之 | nonwoven fabric for printing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58155226U (en) * | 1982-04-10 | 1983-10-17 | 三井化学株式会社 | Laminated sheet for civil engineering |
| JPS595700U (en) * | 1982-06-30 | 1984-01-14 | 藤森工業株式会社 | Composite waterproof sheet |
-
1982
- 1982-10-30 JP JP16391182U patent/JPS5969295U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS595700B2 (en) * | 1978-03-01 | 1984-02-06 | 金井 宏之 | nonwoven fabric for printing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5969295U (en) | 1984-05-10 |
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