JP2002147190A - Tunnel constructing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel constructing method which can efficiently mount a partition wall in a tunnel in a short period of time. SOLUTION: When the partition wall 2 is mounted in the tunnel T, a lower bed 2d of the partition wall 2 is prefabricated in a manner tapering from its longitudinal central portion to end portions, and two bearing members 4 are arranged between the lower bed 2d of the partition wall 2 and a floor surface 1c corresponding to a mounting location of the partition wall 2 in the tunnel T in a longitudinal direction of the lower bed 2d, followed by moving the two bearing members 4 in the longitudinal direction of the lower bed 2d of the partition wall 2. As a result, the partition wall 2 is upward lifted, and an upper bed 2c of the partition wall 2 is brought into contact with a ceiling surface 1a of the tunnel T, whereby the partition wall 2 is mounted in the tunnel T.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel construction method including a step of installing a partition wall in a tunnel.

[0002]

2. Description of the Related Art Conventionally, there is a tunnel 41 having a partition wall 40 therein as shown in FIG. This partition wall 40
Is to improve the safety by partitioning the arrangement positions of various cables 42 such as power lines arranged in the tunnel 41 and pipes 43 such as gas pipes. Conventionally, the partition wall 40 has been formed by casting concrete at a construction site, or has been formed by assembling a plurality of blocks 40a as shown in FIG.

[0003]

However, in the method of forming the partition wall 40 by casting concrete, the concrete casting formwork is loaded into the tunnel 41 and the loaded formwork is assembled. In addition, many work steps are required, such as placing concrete in a formwork. Similarly, the method of assembling the plurality of blocks 40a is based on the loading of the block 40a or the loaded block 40a.
It requires many working steps such as assembling a.
As described above, in the conventional method, many work steps are required, and accordingly, the construction period is prolonged, which causes an increase in cost.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a tunnel construction method capable of efficiently installing a partition wall in a tunnel in a short period of time.

[0005]

In order to solve the above-mentioned problems, a tunnel construction method according to the present invention is directed to a tunnel construction method including a step of installing a partition wall in a tunnel. In the longitudinal direction of the lower end surface between the lower end surface of the partition wall and the floor surface corresponding to the installation position of the partition wall in the tunnel while being formed in advance in a tapered shape from the direction center portion to the end portion. The partition wall is lifted upward by moving the two support members along the longitudinal direction of the lower end surface of the partition wall so that the upper end surface of the partition wall contacts the inner surface of the tunnel. And the partition wall is installed in the tunnel.

According to the present invention, the lower end surface of the partition wall is formed in advance in a tapered shape from the center in the longitudinal direction to the end portion, and the tapered lower end surface is formed in two.
The partition wall can be raised and lowered by being supported by two support members and moving these support members in the longitudinal direction of the lower end surface. Then, when installing the partition wall in the tunnel, in order to position the partition wall with respect to the tunnel, it is necessary to lift the partition wall upward and abut the upper end surface of the partition wall and the inner surface of the tunnel. By disposing the support members between the floor surface corresponding to the installation position and moving these support members, the partition wall can be easily lifted upward. Therefore, the positioning of the partition wall with respect to the tunnel can be performed efficiently, and the overall installation work efficiency can be improved, so that cost reduction can be realized.

At this time, a female screw groove is formed in each of the support members, each of the female screw grooves is connected by a bar-shaped male screw member, and each of the support members is easily moved with a simple structure by rotating the male screw member. be able to.

By forming guide grooves on the support surface of the support member that supports the partition wall, the movement of the support member in the longitudinal direction of the lower end surface of the partition wall can be stably realized.

Further, by providing the low frictional resistance member on the support surface of the support member that supports the partition wall, the support member can be moved stably.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a tunnel construction method according to the present invention will be described below with reference to FIG.
FIG. 1 is a view for explaining a tunnel construction method of the present invention, and FIG. 1 (a) is a side sectional view of the tunnel;
FIG. 1B is an enlarged cross-sectional view near the contact surface (support surface) between the support member and the partition wall.

In FIG. 1A, a tunnel T has a partition wall 2 for dividing the inside of the tunnel T into two spaces. The partition wall 2 is installed upright inside the tunnel T. As shown in FIG. 1A, the partition wall 2 is formed by connecting a plurality of partition walls 2 divided along the direction of the axis L of the tunnel T. The upper end of the partition wall 2 in the upright state is fixed to the ceiling surface (inner surface) 1a of the tunnel T by a bolt (fixing member) 3.

A method of constructing the tunnel T having the above-described configuration will be described. First, a hole is excavated by a shield excavator or a boring machine, and work is performed by segment 1.

Next, the partition wall 2 is carried into the tunnel T from the entrance of the tunnel T. Here, when transporting the partition wall 2, for example, the partition wall 2 is mounted on a trolley (not shown),
The trolley on which the partition wall 2 is mounted is transported along a rail laid in advance from the rear side of the partition wall 2 (the entrance side of the tunnel T).

Then, the partition wall 2 is carried in from the entrance of the tunnel T with the partition wall 2 standing inside the tunnel T. The partition wall 2 is formed in advance at a place other than the construction site of the tunnel T, such as a factory. The size (height) of the partition wall 2 is set according to the size (diameter) of the tunnel T. That is, the height of the partition wall 2 is
The upper end face 2 is large enough to be transported while standing inside.
c and the lower end surface 2d and the inner surface 1a of the tunnel T are set to such an extent that a slight gap is formed.

As shown in FIGS. 1 (a) and 2, each lower end surface 2d of the partition wall 2 rises from the center in the longitudinal direction (the direction of the axis L) toward the side end surfaces 2a, 2b. Is formed in a tapered shape as described above. On the other hand, on the floor 1c in the tunnel T corresponding to the installation position of the partition wall 2,
Two support members 4, 4 are arranged. These two support members 4 are arranged along the longitudinal direction (the direction of the axis L) of the partition wall 2 so as to support the two tapered portions of the lower end surface 2d of the partition wall 2 respectively. And the tunnel T
The partition wall 2 carried into the inside is placed on the support members 4, 4 arranged at positions corresponding to the installation positions.

As shown in FIG. 1 (a), the support surface of the support member 4 supporting the partition wall 2 is formed to be inclined in side view in accordance with the tapered shape of the lower end surface 2d. Further, FIG.
As shown in (b), a guide groove 4a having a V-shaped cross section is formed on the support surface of the support member 4 supporting the partition wall 2, and a lower end surface 2d of the partition wall 2 is also V-shaped when viewed in cross section. Is formed.

Each of the support members 4 has a through hole 5 parallel to the axis L, and a female screw groove 5a is formed in the through hole 5. The through holes 5 are connected by a rod-shaped male screw member 6, and the male screw groove of the male screw member 6 and the female screw groove 5 a of the through hole 5 are screwed respectively.

Then, the male screw member 4 screwed into the female screw groove 5a of the support member 4 supporting the partition wall 2 is rotated. Then, with the rotation of the male screw member 6, the support members 4, 4 having the female screw grooves 5a screwed to the male screw member 6 move so as to approach each other as shown by the broken line in FIG. . As the support members 4 approach, the partition wall 2 having the tapered lower end surface 5 is lifted upward.

The partition wall 2 lifted upward as the support members 4, 4 approach each other brings the upper end surface 2c into contact with the ceiling surface 1a of the tunnel T. Thus, the partition wall 2 is positioned with respect to the tunnel T (segment 1). When the upper end surface 2c of the partition wall 2 is brought into contact with the ceiling surface 1a of the tunnel T, the tunnel T
The (segment 1) and the partition wall 2 are fixed, and the partition wall 2 and the support member 4 are also fixed with bolts 8. FIG.
As shown in (a), a cover member 10 such as an iron plate is provided on the upper end surface 2c of the partition wall 2, and a through hole 11 is formed from the side surface to the upper end surface 2c. The bolt 3 is connected to the segment 1 through the through hole 11. A through hole having the same configuration as the through hole 11 is also formed on the lower end surface 2d side of the partition wall 2, and the bolt 8 is passed through the through hole. Then, the partition walls 2 are connected to each other by the connecting tool 14.

After the partition wall 2 has been installed at the installation position in the tunnel T, the next partition wall 2 is installed in the same procedure as described above. And all the partitions 2
After the installation is completed, invert concrete is poured into the lower part of the tunnel T to form a floor (not shown). When the concrete is cast, the lower end surface 2 of the partition wall 2 is formed.
Since the gap formed between d and the floor 1c of the tunnel T is also filled with concrete, the partition wall 2 is stably installed.

As described above, the lower end surface 2 of the partition wall 2
d from the center in the longitudinal direction to the end (side end surfaces 2a, 2b)
And the lower end surface 2d formed in a tapered shape is formed into two support members 4,
4 to support the support members 4 and 4 at the lower end surface 2d.
The partition wall 2 is raised by moving in the longitudinal direction of
Can descend. Then, partition wall 2 is placed in tunnel T
In order to position the partition wall 2 with respect to the tunnel T, the partition wall 2 is lifted upward and
It is necessary to make contact with the ceiling surface 1a, but the lower end surface 2d
By disposing the support members 4 between the support member 4 and the floor surface 1c corresponding to the installation position and moving these support members 4 in the longitudinal direction of the lower end surface 2d, the partition wall 2 can be easily lifted upward. . Therefore, the positioning of the partition wall 2 with respect to the tunnel T can be performed efficiently, and the entire installation work efficiency can be improved, so that cost reduction can be realized.

At this time, a female screw groove 5a is formed in each of the support members 4, and each of the female screw grooves 5a is connected by a single bar-shaped male screw member 6, and the male screw member 6 is rotated to thereby form the support member 4. Each can be easily moved with a simple configuration.

By forming guide grooves 4a on the support surface of the support member 4 supporting the partition wall 2, the sliding between the lower end surface 2d of the partition wall 2 and the support member 4 can be stably realized. it can.

The lower end face 2d of the partition wall 2 and the support member 4
Between the lower end surface 2d of the partition wall 2 and the support member 4 by applying or applying a low friction resistance member such as Teflon (registered trademark). Can be.

Note that, as shown in FIG.
An elastic member (flexible member) 12 such as rubber may be interposed between the upper end surface 2c of the cover member 10 and the cover member 10. By providing the elastic member 12, it is possible to prevent damage when the upper end surface 2c of the partition wall 2 is brought into contact with the ceiling surface 1a of the tunnel T.

In the above embodiment, when the partition wall 2 is raised and the positioning of the partition wall 2 is not performed as desired, the male screw member 6 is rotated in a direction in which the support members 4 and 4 are separated from each other. The partition wall 2 descends. Then, the positioning operation may be performed again.

In the above embodiment, the tapered shape of the lower end face 2d of the partition wall 2 is changed from the center to the end (side end faces 2a, 2d).
The shape is such that it rises toward b), but it may be a shape that descends from the center to the end.
In this case, the partition wall 2 is raised by separating the two support members 4, 4, while the partition wall 2 is lowered by bringing the support members 4, 4 closer.

[0028]

According to the tunnel construction method of the present invention,
The lower end surface of the partition wall is formed in advance in a tapered shape from the longitudinal center portion to the end portion, and the tapered lower end surface is supported by two support members,
By moving these support members in the longitudinal direction of the lower end surface, the partition wall can be moved up and down. And
When the partition wall is installed on the tunnel, it is necessary to lift the partition wall upward and contact the upper end surface of the partition wall and the inner surface of the tunnel in order to position the partition wall with respect to the tunnel. By disposing the support members between the floor surface and the support member and moving these support members, the partition wall can be easily lifted upward. Therefore, the positioning of the partition wall with respect to the tunnel can be performed efficiently, and the overall installation work efficiency can be improved, so that cost reduction can be realized.

[Brief description of the drawings]

FIG. 1 is a view for explaining one embodiment of a tunnel construction method of the present invention.

FIG. 2 is a diagram for explaining how a partition wall is lifted.

FIG. 3 is a diagram for explaining a partition wall.

FIG. 4 is a view for explaining a problem of a conventional tunnel construction method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 segment 1a Ceiling surface (inner surface) 1c Floor surface (inner surface) 2 Partition wall 2a Side end surface 2b Side end surface 2c Upper end surface 2d Lower end surface 3 Bolt (fixing member) 4 Support member 5 Through hole 5a Female thread groove 6 Male screw member 12 Elastic member L (tunnel) axis T tunnel

Claims (4)

[Claims] 1. A tunnel construction method having a step of installing a partition wall in a tunnel, wherein a lower end surface of the partition wall is formed in advance in a tapered shape from a longitudinal center to an end thereof, and Two support members are arranged along the longitudinal direction of the lower end surface between a lower end surface of the partition wall and a floor surface corresponding to an installation position of the partition wall in the tunnel, and each of the two support members is disposed. Is moved in the longitudinal direction of the lower end surface of the partition wall, thereby lifting the partition wall upward to bring the upper end surface of the partition wall into contact with the inner surface of the tunnel, and installing the partition wall in the tunnel. A tunnel construction method characterized by the following. 2. The tunnel construction method according to claim 1, wherein a female screw groove is formed in each of the support members, and each of the female screw grooves is connected with a bar-shaped male screw member.
A tunnel construction method, wherein each of the support members is moved by rotating the male screw member. 3. The tunnel construction method according to claim 1, wherein a guide groove is formed on a support surface of the support member that supports the partition wall. 4. The tunnel construction method according to claim 1, wherein a low frictional resistance member is provided on a support surface of the support member that supports the partition wall. Method.