JPH09217595A - Timbering erection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the safety of a worker against a falling accident of a working face or the like by enabling the worker to carry out timbering erection work around the working face inside a safety workbench during tunnel excavating work. SOLUTION: Supports curved at the upper parts so as to constitute a roof part 21, and vertical supports are combined using frame members such as steel frame members, and upper and lower parts are reinforced and fixed by horizontal frames. Expanded metal or the like is then spread on the roof part 21 to constitute a safety workbench 13. The safety workbench 13 is fitted to a moving arm 12, equipped at an erection device for timbering 10, through a bracket 23 fitted to the support of the safety workbench 13. The safety workbench 13 can thereby be elevated, and a worker enters into the safety workbench 13 to carry out specified work. The safety workbench 13 is also fitted to the upper part of pantograph type exapnsion mechanism installed on a movable self-traveling vehicle. Since the worker can work inside the safety workbench, the safety of the worker can be ensured against a rockslide accident, a falling-in accident, and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a support work, and more particularly to a safety measure facility for a construction work of a support work around a face face of a tunnel excavation work.

[0002]

2. Description of the Related Art Conventionally, the construction work for supporting work at the face of tunnel construction has conventionally relied on manpower.
Recently, various types of mechanical equipment have been developed to promote unmanned operation. For example, a method of installing a support gripping device on the tip of a guide cell of a drill jumbo, or an erector (gantry type, self-propelled type) dedicated to the installation of support
The method of using is generally used.

[0003]

However, in the above-mentioned construction work of the support work with the face, it is necessary for the worker to enter the face for positioning the support and shaping the roadbed of the support leg. There is no protection on the front of the car, and it is directly installed. From this situation, it is always adjoining the danger of disasters due to collapse around the cutting face, let alone the fact that most of the disasters in tunnel construction occur around the cutting face. There is an urgent need to ensure the safety of

Therefore, the present invention was developed with the object of providing a method of constructing a support work which can ensure the safety of workers even if an accident such as a wing collapse occurs.

[0005]

In order to achieve the above object, the present invention is carried out by the following method. First, a safety workbench is detachably attached to the moving arm of the construction device (gantry type, self-propelled type) for supporting the tunnel construction, and the construction work is performed by the worker in this safety workbench. .

Further, in the construction work for supporting the tunnel construction, this construction work is carried out in a self-propelled and movable safety workbench.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a view showing a working condition at a face portion according to an embodiment of the method of claim 1 of the present invention, FIG. 2 is an external perspective view of a safety worktable in FIG. 1, and FIG. It is a front external view which shows one Example by the method of 2.

First, as shown in FIG. 1, for the positioning of the support work and the roadbed shaping work of the support work legs, etc., which must be relied on manually, the moving equipment equipped in the erection device 11 of the support work 10 is moved. A safety workbench 13 was attached to the arm 12. Of course, the movable arm 12 is provided so as to be movable, and a safety work table 13 is provided.
Can move freely. Further, the safety workbench 13 is constituted by a frame member such as a steel frame material.

Next, the structure of the safety workbench 13 will be described.
As shown in FIG. 2, a strut frame member 18 made of an iron aggregate and a strut frame member 19 (using H-section steel or the like) having an R at the top are combined so as to be in close contact with the side wall 15 of the face 14 of the tunnel. The legs were fixed by the horizontal frame member 20. Then, the roof portion 2 of the pillar frame member 19
1, a horizontal frame member 20 was passed over to serve as a reinforcing material, and an expanded metal 22 or the like was attached thereon. In other words, even if the wing 14 collapses and is covered with rock fall, earth and sand, etc., safe work can be performed. Further, a horizontal frame member 20 is attached and reinforced between the support frame member 18 and the support frame member 18 and between the support frame member 18 and the support frame member 19 provided with R, and the support frame member 19 provided with the above R. In the middle part on the side, the moving arm 12 equipped on the building device 11 of the support structure 10
A mounting bracket 23 is provided for connecting with the.
The safety work table 13 configured as described above is attached to the moving arm 12 via the mounting bracket 23, and the moving arm 12 is operated and set so as to be in close contact with a predetermined position of the side wall 15 of the tunnel. In this way, the worker 17 enters the safe workbench 13 and performs a predetermined work. It is also possible to reinforce the bottom of the safety work table 13 with a frame member and attach the expanded metal 22 or the like.

Further, an embodiment according to claim 2 of the present invention will be described. As shown in FIG. 3, a pantograph type expansion / contraction mechanism 2 using a parallel link is provided with a jack 25 for expansion / contraction drive provided at the center of a movable vehicle 24 that is configured to be movable.
Configured 6. Link members 27 and 28 are provided in the center above and below the expansion mechanism 26 so that the link members 27 and 28 can be moved uniformly upward and downward. And during construction work,
The wheels 29 are locked, or the self-propelled vehicle 24 is fixed at a predetermined position by using fixed feet or the like, and the jack 25 for extension / contraction drive is contracted / extended. The worker 31 is allowed to perform a predetermined work inside. The structure of the safety workbench 30 is the same as the construction method described above with reference to FIG. In addition, the above-mentioned expansion / contraction mechanism 26 is configured by a composite link mechanism composed of a plurality of sets of multi-stage parallel link mechanisms, and the safe work platform 30 is held in a horizontal state without moving the self-propelled vehicle 24 to move up and down and move horizontally. It goes without saying that it is also possible to configure so that

[0011]

[Embodiment] The concrete size of the above-mentioned safety work table has a width of 3 m, a height of 3 m and a depth of 1.5 m.

[0012]

According to the present invention, since the support work is built with the above-described structure, the following effects can be expected. (1) As a particularly dangerous work (work that will be damaged due to collapse around the face of the tunnel etc.) in the construction work of the shoring work, positioning of the shoring work and interposition, roadbed shaping of the shoring foot,
There is work such as moving and fixing the supporting legs, and it is necessary for workers to enter the roadbed in particular. In such a case, according to the present invention, the work can be performed from the safe workbench, and the safety of the worker can be secured even if a rock fall or a collapse occurs. (2) According to the present invention, the construction work for supporting work by manpower around the face is performed by using a self-propelled safety work table or a moving work arm of the installation device equipped with the safety work table. . Therefore, the safe workbench can be freely moved, and the safe workbench can be set to a predetermined position only when necessary according to the progress of the work process. That is, it does not hinder other work. As a result, efficient construction work for supporting work can be realized, which in turn shortens the construction period.

[Brief description of drawings]

FIG. 1 is a working condition diagram of a face portion showing an embodiment according to the method of claim 1 of the present invention.

2 is an external perspective view of the safety work table in FIG. 1. FIG.

FIG. 3 is a front external view showing an embodiment according to the method of claim 2 of the present invention.

[Explanation of symbols]

 10 ... ・ Supporting work 11 ・ ・ ・ Building device 12 ・ ・ ・ ・ Movement arm 13 ・ ・ ・ ・ Safety worktable 14 ・ ・ ・ ・ Face 15 ・ ・ ・ ・ Sidewall 16 ・ ・ ・ ・ ・ ・ Gripping part 17・ ・ ・ Worker 18 ・ ・ ・ Strut frame member 19 ・ ・ ・ Strut frame member (with top R) 20 ・ ・ ・ Horizontal frame member 21 ・ ・ ・ Roof part 22 ・ ・ ・ Expanded metal 23・ ・ ・ ・ Mounting bracket 24 ・ ・ ・ ・ Self-propelled vehicle 25 ・ ・ ・ ・ Jack 26 ・ ・ ・ ・ Expansion mechanism 27 ・ ・ ・ ・ Link member 28 ・ ・ ・ ・ Link member 29 ・ ・ ・ ・ Wheels 30 ・ ・..Safe work table 31 .... Workers

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Koji Yuki 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation

Claims (2)

[Claims] 1. In a construction work for constructing a support work for a tunnel construction using a gantry type or self-propelled construction device, a movable work arm of the construction device is detachably equipped with a safety worktable. Then, the construction method of the support work is characterized in that the construction work is performed by the worker in the safe workbench. 2. A method of constructing a support work in a construction work of a support work in a tunnel construction, wherein the construction work is carried out in a self-propelled and movable safety work table.