JPH0874498A - Lining segment - Google Patents

Abstract

PURPOSE: To enable the execution of water-proofing work with a little labor in a short time and prevent leakage completely by attaching water-proof heat weld sheet like material in the state of wrapping a segment body for covering to protect the excavated hole wall surface, from the outer surface to the faying surface of the side face of the segment body. CONSTITUTION: Bolt holes 2 are fitted to the faying surface IC of the side face of a segment body 1 of sector shape. Water-proof heat weld sheet like material 3 is attached in the state of wrapping the segment body 1, and heating wire 4 is interposed between the faying surface IC and the sheet like material. The faying surface IC of the segment body 1 is brought into contact with the peripheral end face part of an existing segment body 1 in a tunnel constructed by the excavator of a shield machine or the like, and the existing segment body l and the new segment body 1 are connected to each other by bolts to be fixed. A lead wire 5 extended out of each faying surface IC to be sealed is then connected to a heating power source, and a current is applied for the fixed time to heat the heating wire 4. The sheet like material placed between the adjacent faying surface IC is thereby welded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lining segment for covering and protecting a wall surface of an excavated hole and effectively sealing water leakage during excavation work for a tunnel or the like.

[0002]

2. Description of the Related Art Conventionally, as means for protecting wall surfaces of holes and preventing water leakage, a packing made of a plastic or rubber soft material is interposed as a sealing material at the joint portion of each segment, or provided at the joint portion. It is known that a waterproof agent is injected into the groove.

[0003]

However, according to the above-mentioned conventional formation of the segment, the former is complicated because the packing must be attached while assembling the segment, and water leakage from the joint of the packing or elastic due to radial pressure. There is a problem of causing fatigue, and in the latter case there is a problem that a sufficient water-stopping effect cannot be obtained due to the openings of the segments and air bubbles in the water-stopping agent because of only the groove of the water-stopping agent. Was.

An object of the present invention is to solve the above problems and provide a lining segment capable of completely preventing water leakage between the segments.

[0005]

In order to achieve the above object, the present invention includes a water-resistant heat-welding sheet-shaped material wrapped from the outer surface of the segment body for covering and protecting the wall surface of the drilled hole to the side joint surface. It is characterized by

[0006]

In the lining segment according to claim 1, since the water-resistant heat-welding sheet-like material is wrapped from the outer surface of the segment main body to the side joint surfaces, the joint main surfaces are bonded and abutted against each other. By heating the sheet-shaped material at the point of, and welding between these sheet-shaped materials,
It is possible to reliably prevent water leakage.

In the lining segment of the second aspect, since the polyolefin resin is used as the water-resistant, heat-welding sheet-shaped material, it is easily available.

In the lining segment according to claim 3, the sheet-shaped materials can be welded to each other only by energizing the heating wire or the heating plate interposed between the joint surface and the water-resistant heat-welding sheet-shaped material. , The work is extremely easy.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

The segment body 1 is formed in a fan shape, and
Reference numeral a is an inner surface, 1b is an outer surface, and 1c is a side joint surface. A bolt hole 2 for joining is provided on the joining surface 1c.

Reference numeral 3 represents a water-resistant heat-welding sheet-like material,
The sheet-shaped material 3 is made of a polyolefin resin such as high density polyethylene, polypropylene, polyvinyl chloride, polybutene, polyurethane, and synthetic rubber. In the polyolefin resin, particularly, even if the high density polyethylene is thin, it is durable. preferable.

Then, the sheet-shaped material 3 is wrapped from the outer surface 1b of the segment body 1 to the joint surfaces 1c on the four side surfaces thereof, and at the time of this wrapping, the joint surface 1c and the sheet-shaped material are joined together at each joint surface 1c. A heating wire 4 such as a nichrome wire was interposed between the heating wire 3 and the heating wire 3.

Reference numeral 5 indicates a lead wire of the heating wire 4.

Next, the construction by the segment body 1 will be described.

As shown in FIG. 3, the peripheral surface of the existing segment main body 11 in the tunnel formed by an excavator such as a shield machine is brought into contact with the joint surface 1c of each segment main body 1 ... The existing segment body 11 and the new segment body 1 ...

Next, by connecting a lead wire 5 extending from each joint surface 1c to be sealed and a heating power source (not shown) to energize the heating wire 4 for a certain period of time to heat the heating wire 4.
The sheet-like materials 3 between the adjacent joint surfaces 1c and 1c are welded to each other.

Thus, the sheet-like material 3 between the segment main bodies 1 ... 1 can be adhered to each other in a short time with a small amount of labor to perform the water leakage prevention work.

A metal plate may be used instead of the heating wire 4, and an eddy current may be generated in the metal plate to function as the heating plate.

[0019]

As described above, according to the present invention, it is possible to perform the waterproofing work between the lining segments with a small labor and a short time, and it is possible to completely prevent water leakage.

[Brief description of the drawings]

FIG. 1 is a perspective view of a segment according to an embodiment of the present invention as viewed from the inner surface.

FIG. 2 is a perspective view of the segment viewed from the outer surface.

FIG. 3 is a perspective view showing an assembled state of the segments.

[Explanation of symbols]

 1 segment body 1b outer surface 1c joint surface 3 water-resistant heat-welding sheet material 4 heating wire

Claims (3)

[Claims] 1. A lining segment characterized in that a water-resistant heat-welding sheet-like material is wrapped from the outer surface of a segment body for covering and protecting the wall surface of a drilled hole to the side joint surface. 2. The lining segment according to claim 1, wherein the water-resistant heat-welding sheet-shaped material is made of a polyolefin resin. 3. The lining segment according to claim 1, wherein a heating wire or a heating plate is interposed between the joining surface and the water-resistant heat-welding sheet-shaped material.