JPH011897A - Water stop structure for tunnels - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention directs spring water from another mountain into the tunnel excavation to the bottom of the tunnel! & This relates to a water-stop structure for tunnels in which a waterproof sheet is placed on the side of another mountain for drainage.

[Conventional technology]

In general, a tunnel shaft is constructed by installing a waterproof sheet 1 for water collection and drainage on the other side of the tunnel 4, which is made by spraying secondary concrete 3 onto bedrock 2, as shown in Figure 7JrJ6. Covering the secondary concrete 14, water leakage from the ground is collected by the waterproof sheet 1 and drained to the side bottom of the tunnel 4, thereby preventing cracks from occurring in the stop of the tunnel shaft and the secondary concrete. Ta.

This waterproof sheet 1 has a width of 1 as shown in Figure 7.
~ 1.5 meters long is extended and fixed around the tunnel circumference,
A steel band 15 was attached to the widthwise end of the waterproof sheet 1 with an appropriate amount of slack in order to adjust to the irregularities of other mountains, and concrete nails 16 were driven into the waterproof sheet 1.

[Problem that the invention seeks to solve]

However, in the method described in F, the width h- of the waterproof sheet 1 is
It is easy to make the waterproof sheet l slack in the direction (tunnel H direction), but it is difficult to make it loose in the length direction (tunnel circumferential direction) of the waterproof sheet l.
Due to the load when pouring the secondary 3Y and 1 concrete after iI, the waterproof sheet l will be pulled in the circumferential direction of the tunnel, and it will not adjust to the unevenness of the ground, and if forced, there is a risk that the waterproof sheet will be damaged. In addition, in this method, since the band iron 15 is brought into contact with the front side (inner surface side of the tunnel) of the waterproof sheet 1 laid out on the ground and the concrete nails 16 are driven in, a bottle hole can be made in the waterproof sheet 7. Water leaks often occur, and furthermore, since the tarpaulin sheet 1 is used to attach narrow items of 1 to 1.5 m, adjacent tarpaulin sheets! There were many problems, such as having to overlap each other or welding another waterproof sheet to the mating part when attaching it to an adjacent sheet, which required a complicated processing process.

This invention was made in view of the above points, and an object of the present invention is to provide a water-stop structure for tunnels, which allows easy installation of a waterproof sheet, and prevents damage to the waterproof sheet, occurrence of cracks, and water leakage. There is.

[Means for solving problems]

Next, the present invention will be described with reference to FIG. 1 corresponding to the embodiment.
j and explain. That is, this invention provides guides G made of a plurality of long strips of R-78 material provided at predetermined intervals in the circumferential direction of the tunnel. There are several hanging devices S, S2., which cover the other side of the tunnel and are movably attached to the Moeki guide on the back side. The waterproof sheet 1 provided with S3... and an IF water tank structure for a tunnel are used as the f stage.

(Function) 11 “By step f in the description, the suspenders S, S
2. By movably attaching the guides G1, G2, and so on to the guides G1, G2, and so on, a waterproof sheet cover as shown in FIG. 1 is formed inside the earth. This waterproof sheet 1 has a guide G.

G2. G3... is attached to a part of G3 while folded in the direction of the tunnel, is guided by moving it to the left, and is extended to the side of another mountain or moved to an arbitrary position within the tunnel. be done. By doing this, the waterproof sheet l
No matter how long it is made in the tunnel direction,
Hanging tools S, S2 for the waterproof sheet 1. S3. Not only is it possible to install the waterproof sheet by simply connecting it to the guide G, G2゜G,, ..., but if the waterproof sheet is 1 or long, there will be less cover and it will be easier to cover the ground. Spring water can be collected and drained from the bottom without leaking.

In addition, since each part of the waterproof sheet 1 is supported by multiple guides, its gravity is supported evenly, and if it is only in the tunnel direction, it can be expanded with slack in the circumferential direction of the tunnel. It is.

[Example] An example of the present invention will be described above based on the drawings. 1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a partial cross-sectional perspective view of the tunnel municipal water structure, FIG. 2 is a perspective view of a guide, and FIG. 3 is a perspective view of a guide. The figure is a perspective view of the fastener attached to the guide in Figure 2, and Figure 4 is a hanger fixed to the back of the waterproof sheet! It is an external perspective view of 1S. In the figure, 1 is a waterproof sheet, 2 is the bedrock of the excavated tunnel, and 3 is
is a partial concrete layer sprayed on bedrock 21:
4 is the tunnel formed by the next concrete layer 3.

As shown in FIG. 1, the waterproof sheet 1 is a water-blocking sheet made of soft resin or rubber, and the back side (on the ground side) is provided with a loop-raised knitted fabric layer as a water-permeable buffer layer 5 that provides extensibility. On the back side of this waterproof sheet l, hanging tools S, S2, which will be described later, are placed at predetermined intervals (intervals according to the slackness of the waterproof sheet).
．． S,,- are attached.

The tunnel 4 is drilled into the bedrock 2.
A concrete layer 3 is sprayed on a part of the surface to temporarily prevent the collapse of the bedrock 2 and spring water.

Guides G, , G2 . -... is fixed.

The guide may be fixed to the bedrock 2.

As shown in Fig. 2, the guide G is a long piece of material with a C-shaped cross section, and mounting holes 6 are provided at predetermined intervals in the longitudinal direction, and the guide G is attached to the other side using concrete nails (not shown). can be attached to. During this installation, the 1R of the waterproof sheet 1 is parallel to the tunnel direction and tilted in the tunnel circumferential direction.
In addition, a plurality of guides G, , G2, etc. can be attached taking into consideration the pondage of the tarpaulin sheet 1 when it is unfolded. These guides (G+, G2...) are fixed in the grooves 7 of the guides G, t', respectively.
L It is designed to be able to send multiple items.

The fastener T is formed by a cylindrical main body part 8 and a hook part 9 provided on one end surface of the main body part 8.
The cylindrical part has a step 1 that engages with the groove 7 of the guide G.
0 is the default. The hook portion 9 protrudes from the end surface of the main body portion 8, and a locking hole 11 is provided in the protruding portion. A hanging tool 5 is adapted to be locked in this locking +F hole 11.

The hanger 5 is a nearly circular key part protruding from the center of the planar plate-like flat part 12 [3], and the back side of the flat part 12 is pasted on the waterproof sheet 1, and the key part 13 is By being locked to the hook part 9 of the Moeki fastener T, the waterproof sheet 1 is locked to the fastener T and can be guided by the guide G and moved.

With the configuration described above, there is a guide G on the back side of the Pme waterproof sheet 1.
,,G2... Hanging JLs+ according to the interval.

S2. S, -... are fixed by welding etc., and the guys F, G,
, G2. - Fastener T, attached to...

T2. By moving the waterproof sheet 1 toward the tunnel while sequentially locking the key portions 13 of the hanger 5 to the hook portions 9 of T3..., the waterproof sheet 1 partially covers the concrete layer 3.
It is easy to spread it loosely inside the ground.

At this time, if the waterproof sheet 1 has a width in the circumferential direction of the tunnel, it can be stretched in the tunnel direction as long as shown in the figure.

In this way, by providing the waterproof sheet 1 inside the earth and providing the secondary concrete inside it, as shown in FIG. 6, it is possible to drain the spring water from the earth.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, the guides G, .几S, , --... are directly engaged.

(Effects of the Invention) According to the present invention, the tarpaulin sheet can be slackened in the tunnel circumferential direction, the slackness of the tarpaulin sheet in the tunnel direction can be set freely, and the tarpaulin sheet suspended at a predetermined position can be pulled out in the tunnel direction. It is possible to display it in this way. Furthermore, it is possible to use a long waterproof sheet in the tunnel direction, and there is no need to provide mounting holes on the surface of the waterproof sheet. Therefore, according to the present invention, there is a significant effect that it is possible to improve the efficiency of the work of spreading the waterproof sheet, and it also contributes to improving the +h water reliability.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional perspective view of a water stop structure for tunnels according to the first embodiment of the present invention, FIG. 2 is an external perspective view of the guide used in FIG. 1, and FIG. 2 is an external perspective view of a fastener attached to the guide, FIG. 4 is an external perspective view of a hanging box secured to the fastener shown in FIG. 3, and FIG. 5' Partial cross-sectional perspective view of an example city water structure for tunnels, No. 6
The figure is a front cross-sectional view of the completed tunnel, and FIG. 7 is a cross-sectional view of the conventional technology. ! ... Tarpaulin sheet, 4-・Mine shaft. G--Guide, S--Hanging device. Patent applicant: Norimitsu Nishimura, agent/patent attorney for CI Kasei Co., Ltd. Figure 2G Figure 3 141 Figure 6

Claims (1)

[Claims] In a water-stop structure for a tunnel in which a waterproof sheet is stretched on the side of the ground of a tunnel excavation path, a plurality of strips are provided parallel to the tunnel direction on the side of the ground and spaced at predetermined intervals in the circumferential direction of the tunnel. For a tunnel, comprising: a guide made of elongated material; and a waterproof sheet that covers the side surface of the ground of the tunnel and has a plurality of hanging tools on the back side that are slidably engaged with the guide. Water-stop structure.