JPH0828194A - Tunnel waterproofing construction and its waterproofing material - Google Patents

Abstract

PURPOSE:To reduce leakage of water by extending coil spring like spiral movable striations in the tunnel cross direction between a water permeable sheet and a flat waterproofing sheet and arranging them in parallel by way of separating them from each other in the tunnel lengthy direction. CONSTITUTION:Coil spring like spiral striations 2 consisting of plastic, etc., are interposed between sheets 11, 12 in case of covering a tunnel initially covered surface L with the flat waterproofing sheet 12 under interposition of the water permeable sheet 11 of nonwoven fabric, etc. Thereafter, these striations 2 are extended in the cross direction of a tunnel and arranged in parallel by way of separating them from each other in the tunnel lengthy direction. Thereafter, a drain space S extending in the tunnel cross direction is formed on the back surface of the sheet 12 by the striations 2. Water springing out from a natural ground to the initially covered surface L flows to a drain pipe on a lower part of a tunnel sidewall through the space S. Additionally, the nonwoven fabric diffuses springing water and prevents leakage of water from a broken hole of the sheet 12 at a point at a distance from a water springing point. Consequently, it is possible to prevent or to reduce leakage of water and to improve workability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel waterproofing method in which a primary lining surface of a tunnel is covered with a flat waterproof sheet with a water-permeable sheet such as a non-woven fabric interposed therebetween, and a waterproofing material used therefor.

In such a tunnel waterproofing construction, a water-permeable sheet and a flat waterproof sheet are interposed between the primary lining and the secondary lining of the tunnel, and the linings are separated from each other to form the secondary lining. Prevents concrete from cracking, the water-permeable sheet plays a role of protecting the waterproof sheet, and the waterproof sheet plays a role of preventing leakage of tunnel spring water.

[0003]

2. Description of the Related Art According to the conventional method of tunnel waterproofing construction of the above-mentioned style, if there is a broken part in the waterproof sheet, even if the spring part of the ground is separated from the damaged part, There were times when water leaked. This is because the water-permeable sheet contains natural spring water and diffuses it into the four sides of the primary lining surface. This tendency becomes stronger when the water-permeable sheet is a non-woven fabric. The water permeability of the non-woven fabric in the cloth surface direction is about 10 times higher than that in the thickness direction.

The above-mentioned water leakage problem due to the above-mentioned reason is called a corrugated sheet in which ribs are formed in parallel on one side, and a conventional waterproof sheet stretched on the primary lining surface is used instead of the flat waterproof sheet. However, it is not resolved.
The rib of the corrugated sheet, that is, the corrugated rib, has a height of about 1.5 to 2.5 mm. When the parallel body of the rib is covered with a water-permeable sheet such as nonwoven fabric, the groove formed by the parallel ribs is water-permeable. Since it is a sheet, it virtually disappears, and the result is similar to that of a flat sheet. Even if the groove is left as a drainage space on the back surface of the waterproof sheet by some means, the water leakage cannot be eliminated. With the corrugated type, the drainage space extends over the entire back surface of the tarpaulin. This means that when the primary lining surface is covered with the waterproof sheet with the water-permeable sheet interposed, the entire back surface of the waterproof sheet becomes substantially water. Therefore, the water in the drainage space is almost ineffective for the above-mentioned measures against water leakage.

[0005]

DISCLOSURE OF THE INVENTION An object of the present invention is to diffuse spring water by a water permeable sheet in waterproof construction of a tunnel in which the primary lining surface of the tunnel is covered with a flat waterproof sheet with a water permeable sheet interposed. It is to prevent the leakage of water due to the above.

Another object of the present invention is to obtain excellent workability in waterproofing a tunnel of the above-mentioned type.

Another object of the present invention is to provide a tunnel waterproof material which can achieve the above object.

[0008]

The construction method according to the present invention adopts the following or the following specifications in the waterproof construction of a tunnel in which the primary lining surface of the tunnel is covered with a flat waterproof sheet with a water-permeable sheet such as a non-woven fabric interposed therebetween. It is characterized by that.

In a mode in which a coil spring-like spiral-shaped flexible strip is provided between the water-permeable sheet and the flat waterproof sheet, the strip extending in the tunnel crossing direction and being spaced apart in the tunnel length direction and arranged in parallel. The waterproof construction is performed by a method of interposing.

A sheet waterproof material, which is a laminate of a water-permeable sheet such as a non-woven fabric and a flat waterproof sheet, is interposed between the coil spring-like spiral flexible strips arranged in parallel with each other. The existing direction is the tunnel crossing direction, and the flat tarpaulin is inside the tunnel mine,
The waterproof construction is performed by laying on the primary lining surface of the tunnel.

[0012] A water-permeable sheet such as a non-woven fabric attached on one side in a manner of arranging coiled-spring-like spiral-shaped flexible strips in parallel with each other in a direction in which the strips extend in the tunnel transverse direction inside the tunnel pit. As described above, the waterproofing is carried out by laying on the primary lining surface of the tunnel and laying a flat waterproof sheet on it.

The tunnel waterproof material according to the present invention is a laminated body of a water-permeable sheet such as a non-woven fabric and a flat waterproof sheet, and between the sheets, coiled spring-like spiral flexible strips are arranged in parallel. It is characterized in that it is interposed under the form.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings showing an embodiment of the present invention,
The present invention will be described.

In the present invention, the primary of the tunnel is provided under the interposition of a water-permeable sheet such as a non-woven fabric (hereinafter, "non-woven fabric" is a general term for the water-permeable sheet except for the "effects of the invention" and the following). It is intended for tunnel waterproofing in which the lining surface L is covered with the flat waterproof sheet 12.

To carry out this type of tunnel waterproofing, in the present invention, a coil spring-like spiral flexible strip 2 is provided between the non-woven fabric 11 and the flat waterproof sheet 12, and the strip 2 is a tunnel. A method of extending in the transverse direction and interposing in a manner of being spaced apart and arranged in parallel in the tunnel length direction is adopted (this method is referred to as specification (I)).

Alternatively, in order to carry out the waterproof construction, a sheet made of a laminated body of a non-woven fabric 11 and a flat waterproof sheet 12 which are interposed between the flexible strips 2 in a spiral shape like a coil spring in a spaced apart and parallel manner. The waterproof material 1 is stretched on the primary lining surface L of the tunnel in the following a procedure (this method is referred to as specification (II)).

A. When the sheet waterproof material 1 is stretched on the primary lining surface, the extending direction of the striations 2 is oriented in the tunnel transverse direction, and the flat waterproof sheet 12 is located inside the tunnel pit.

Alternatively, for waterproofing the same, a non-woven fabric 11 attached to one side in a spiral spring-like helical flexible line 2 spaced apart and arranged in parallel is formed on the primary surface L of the tunnel as in the following step b. Then, the flat waterproof sheet 12 is stretched from above (this is referred to as specification (III)).

B. When the non-woven fabric 11 is stretched on the primary lining surface, the striations 2 are oriented so as to extend in the tunnel transverse direction inside the tunnel pit.

The construction method of the specification (I) is not limited, but as a result of adopting the construction method of the specification (II) or (III), the striation 2 is formed between the nonwoven fabric 11 and the flat waterproof sheet 12.
It is preferable to interpose in a predetermined manner as shown above.

The outline of the tunnel waterproof construction according to the specifications (I), (II) and (III) is as shown in FIG. FIG. 1 is a cross-sectional view in the tunnel length direction schematically showing a state in which construction has been completed.

The reference numeral 3 in FIG. 1 indicates the joint between the non-woven fabric 11 and the flat waterproof sheet 12. In the illustrated example, the non-woven fabric 11 and the flat waterproof sheet 12 are heat-fusible, and their joining is heat-welding according to a conventional method.

In the above-mentioned specification (II), the sheet waterproof material 1 for the tunnel waterproof material is shown in FIG. 2 (A), and the coil spring-like spiral flexible line 2 is shown in FIG. 2 (B).

The tunnel waterproof material shown in FIG. 2A is a nonwoven fabric 1.
1 and the flat waterproof sheet 12 are interleaved with a coil spring-like spiral flexible strip 2 in parallel with each other, and the nonwoven fabric 11 and the flat waterproof sheet 12 are produced by a method known per se. It is joined. The striations 2 may be attached to the non-woven fabric 11 in the predetermined juxtaposed manner, and the flat waterproof sheet 12 may be bonded to the non-woven fabric 11 from above, so that the strips 2 are interposed between them. The striation 2 can be attached to the non-woven fabric 11 by sewing, and the sewing is sufficient at some places.

The coil spring-like spiral flexible strip 2 may be filled with a plastic wire material such as polyvinyl chloride or polyethylene.

The component of the tunnel waterproof material, which is used in the specification (III) and is composed of the nonwoven fabric 11 having the coil spring-like spiral flexible strip 2 on one surface, is shown in FIG. The striation 2 can be attached to the element 1'by the above method.

In the present invention, in order to cover the primary tunnel lining surface L with the flat waterproof sheet 12 with the non-woven fabric 11 interposed,
The coil spring-like spiral line 2 is interposed between the non-woven fabric 11 and the sheet 12 in the predetermined manner shown above.
According to this, the ridge line 2 forms a drainage space S, that is, a water channel, extending in the tunnel transverse direction on the back surface of the flat waterproof sheet 12. Therefore, the water that gushes from the natural ground to the primary lining surface flows through the drainage space S formed by the spiral line 2 to the drain pipe at the bottom of the tunnel side wall or collects at the water collecting work at the invert section.

The drainage space S as the water channel according to the present invention is composed of the inner space of the coil spring-like spiral line 2.
They are separated in the tunnel length direction. For this reason,
The non-woven fabric diffuses the spring water from the spring location, which prevents water from leaking from the waterproof sheet damage hole at the location away from the spring location, or at least contributes to significantly reduce the tendency of water leakage. To do. If the drainage space as a waterway is separated in the length direction of the tunnel, if water comes to the location of the drainage space before the water diffuses into the sheet damage hole at the location away from the spring part, It flows in and is drained or collected as described above, and does not diffuse beyond the same space. Moreover,
The coil-like spiral shape has a sufficiently high porosity of water inflow, and it is extremely easy for water to flow in. That is, the drainage space according to the present invention functions to prevent the spring water generated at a location apart from the sheet breakage hole from diffusing to the hole.

In the case of the above-mentioned specification (II), the spiral pitch 2 which becomes the drainage space generally has a parallel pitch of about 2 to 1 m, more preferably about 0.5 to 0.3 m. In the case of III), the parallel pitch is about 2 to 1 m, more preferably 0.5 to 0.3 m, and the spiral inner diameter d of the thread 2 is 5 to 20 mm for both specifications (II) and (III).

In the present invention, the spiral line 2 is filled with a flexible one. This is because even in the specification (II), in the waterproof waterproof construction of the style described at the beginning, the sheet waterproofing material 1 has good conformability to the unevenness of the primary lining surface of the tunnel, and excellent workability is obtained. In the specification (III), since the nonwoven fabric 11 with the striations 2 and the flat waterproof sheet 12 are stretched separately, the conformability to the irregularities of the primary lining surface of them is further excellent, and the workability is also excellent.

According to the present invention, a coil spring-like spiral flexible line is used for the member for forming the drainage space on the back surface of the waterproof sheet so that the line can be formed even after the secondary lining concrete is placed. By ensuring the drainage space behind the tarpaulin.

A tunnel waterproof material which is a laminated type of a non-woven fabric 11 and a flat waterproof sheet 12 and in which a flexible strip 2 having a coil-like spiral shape is separated and juxtaposed between the non-woven fabric and the sheet. According to (Invention of Claim 4), the construction method of the above-mentioned specification (II) is used to obtain the waterproofing effecting the above-mentioned preferable action easily on the primary lining surface of the tunnel.

[0033]

As is clear from the above description,
The present invention, in the tunnel waterproofing construction of the style described at the beginning, due to the permeable sheet diffusing the spring water,
It has the effect of preventing water from leaking from the waterproof sheet damage hole at a location distant from the spring location, or at least has the effect of significantly reducing the tendency of water leakage, and can also obtain excellent workability, and such an effect is achieved. The provision of a tunnel waterproofing material can be achieved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an outline of a construction mode of a construction method according to the present invention.

FIG. 2 (A) is a perspective view showing an example of a tunnel waterproof material according to the present invention with a part thereof cut away, and FIG. 2 (B) is a front view of the waterproof material with a helical strip line partially omitted. Is.

FIG. 3 is a perspective view showing a component of a tunnel waterproof material of another example according to the present invention with a part cut away.

[Explanation of symbols]

1 Sheet waterproofing material as waterproofing material for tunnel waterproofing construction 1'Construction element of tunneling waterproofing material 11 Water permeable sheet 12 Flat waterproof sheet 2 Coil spring-like spiral flexible strip L Tunnel primary lining surface S Drainage space

Claims (4)

[Claims] 1. In a waterproof construction of a tunnel in which the primary lining surface of the tunnel is covered with a flat waterproof sheet with a water-permeable sheet interposed, a flexible spring line like a coil spring is provided between the two sheets, A tunnel waterproof construction method, characterized in that the construction is carried out by a method of extending in a tunnel crossing direction and being spaced apart in a length direction of the tunnel and arranged in parallel. 2. In waterproof construction of a tunnel in which the primary lining surface of the tunnel is covered by a flat waterproof sheet with a water-permeable sheet interposed, the flexible ridges of a coil spring-like spiral are separated and arranged in parallel. A sheet waterproof material made of a laminated body of a water permeable sheet and a flat waterproof sheet, which is stretched on the primary lining surface of the tunnel so that the extension direction of the striations is across the tunnel and the flat waterproof sheet is inside the tunnel pit. Then, a tunnel waterproofing construction method characterized in that the construction is carried out. 3. The tunnel lining surface is covered with a flat waterproof sheet with a water-permeable sheet interposed between them. Under the tunnel waterproofing construction, the coil spring-like spiral flexible strips are installed on one side in a spaced and parallel manner. Perform the above-mentioned construction with a specification that a waterproof sheet is laid on the primary lining surface of the tunnel and the flat waterproof sheet is laid on it so that the above-mentioned line extends in the tunnel transverse direction inside the tunnel mine. Tunnel waterproofing construction method characterized by that. 4. A laminated type of a water-permeable sheet and a flat waterproof sheet, wherein a coil spring-like spiral flexible strip is interposed between the sheets in a spaced and juxtaposed manner. Characteristic tunnel waterproof material.