JP3080772B2 - Tunnel drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavation apparatus capable of performing excavation of ground, assembling of supports, and placing concrete in a series of excavations.

[0002]

2. Description of the Related Art At present, various types of mechanization are being planned to improve the efficiency of tunnel excavation work and reduce the burden on workers. For example, it may be necessary to assemble a shoring in order to support the ground at the ceiling, and a typical example of the work is a process of assembling an H-shaped steel into an arch shape and arranging a reinforcing bar between the H-shaped steels. However, in order to perform this work efficiently according to the progress of excavation, it is necessary to smoothly supply H-section steel and reinforcing steel to the site. Further, since the reinforcing bar is formed in a wire mesh shape and is large and difficult to handle, it is desired that the assembling work be machined as much as possible.

[0003] In addition, concrete lining is performed later by covering the shoring. However, this work requires time for curing the concrete, so that it takes time, and even in the case of mechanization, it is independent of the excavation process. We need to be able to do it. To put it the other way around, it is desirable that the excavation work be able to proceed independently in terms of excavation efficiency.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to satisfy the above-mentioned demands in the conventional tunnel excavation work. And a transfer bogie that moves between them, and the preceding bogie has a rebar for an excavator provided for excavation of the ground and a shoring provided along the inner wall surface of the excavated tunnel. A rebar assembling device to be supplied is mounted, and the transporting truck for transporting materials and the like is transferred to the concrete placing device or the preceding truck by the transfer cart.

[0005]

According to the tunnel excavator having the above structure, excavation of the ground is performed by the excavator on the preceding bogie. Also, for the support provided on the inner wall of the excavated tunnel,
The rebar is supplied and attached by the rebar assembling device.
On the other hand, concrete is cast on the inner surface of the tunnel over the support by the concrete casting device behind. During this time, the excavation proceeds independently. The transport trolley coming from behind the concrete placing device is transferred to the transfer trolley through the concrete placing device, is moved to the rear end of the preceding trolley together with the transfer trolley, and is moved from the transfer trolley to the preceding trolley. Move up and supply rebar.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a perspective external view of an apparatus according to one embodiment. Reference numeral 1 denotes a preceding bogie, which can run on a rail 2 laid at the bottom of the tunnel. Rails 3 are laid on both sides of the upper surface of the preceding bogie 1, and an arch-shaped frame 5 of a reinforcing-bar assembly device 4 is movably mounted thereon. A rack 6 is provided on the peripheral surface of the arm-shaped frame 5 in an arc shape, and a transfer table 7 is provided so as to be movable using the rack 6 as a rail. The reinforcing bar 8 is placed on the transfer table 7 and is transferred. The reinforcing bar 8 is formed in a wire mesh shape.

[0007] A rail 9 is laid on the inside of the rail 3 on the preceding bogie 1, and a self-propelled ridge device 10 is mounted on the rail 9. The mountain retaining device 10 includes a substantially trapezoidal frame 1.
1 and a plurality of mountain retaining members 12 arranged along the outer periphery of the frame 11. The mountain retaining member 12 is the jack 1
4. This retaining device 10 includes a front ground 1
5 so that it can pass through the reinforcing-bar assembly device 4 in order to move forward and to stand behind when unnecessary. At the rear of the shoring device 10, the device 10 is
Is provided with a rail clamp device 16 for fixing the rail clamp device to the rail. In addition, at the front end of the preceding bogie 1, a holding device 18 for holding a held member 17 protruding from the front surface of the frame body 11 is provided to hold the buckling device 10 that has come to the forward end.

A rail 19 is also laid on the preceding carriage 1 further inside the rail 9, and an excavator 20 is mounted on the rail 19. The excavator 20 is used for excavating the ground 15 at the front end on the rail 19. The excavator 20 employed here is a free-section excavator, which is used for excavating the entire section of the tunnel.

A concrete placing device 21 is located behind the excavated tunnel. In the figure, it is shown at a close position for convenience of expression, but actually, it is located further back. The concrete placing device 21 is supported by a base 22 moved on the tunnel floor, a support frame 23 constructed on the base 22, a jack 24 provided on the support frame 23, and the like. Is provided with an inner mold 25 that is arched along the inner wall surface of the tunnel in which is built, and a concrete injection device (not shown) that injects concrete between the outer peripheral surface of the inner mold frame 25 and the inner wall surface of the tunnel. Has become. The inner frame 25 can be expanded and contracted by the jack 24 and the like.

A transfer truck 26 is mounted on the rail 2 between the preceding truck 1 and the concrete placing device 21. The transfer trolley 26 is used to transfer a transport trolley 27 for transporting materials such as H-section steel and the reinforcing bars 8. The transfer trolley 26 is connected to the front end of the concrete laying device 21, and is transferred to the concrete laying device 21. The transfer cart 27 can be transferred to and from the cart 26, and is connected to the rear end of the preceding cart 1, so that the transport cart 2 between the preceding cart 1 and the transfer cart 26 can be transferred.
7 can be delivered. The supply of the materials to the transport trolley 27 is performed behind the concrete placing device 21, for example, at the entrance of a tunnel.

Next, the concrete lining work of assembling excavation and support by the tunnel excavator having the above configuration will be described. The ground 15 in front is excavated by the excavator 20 located at the front end of the preceding bogie 1. Excavated rocks, soil discharge,
That is, the displacement is performed by the conveyor 28 arranged on the tunnel floor.

[0012] In parallel with the excavation work, a support is assembled on the excavated tunnel inner wall. The assembling work is performed by assembling the H-shaped steels 29 at predetermined intervals along the inner wall surface of the tunnel in an arch shape, and arranging the reinforcing bars 8 between the H-shaped steels 29. The installation of the reinforcing bar 8 on the lower side surface is relatively easy by an operator, but the mounting on the upper side is performed by transporting the reinforcing bar 8 to the reinforcing bar assembling device 4 because the reinforcing bar 8 is large and difficult to handle. It is mounted on the table 7 and carried to the mounting target by the transfer table 7 to perform the mounting operation.

[0013] Further behind, a concrete lining operation is performed in parallel with the above operation. That is, the inner mold 25 of the concrete placing device 21 is expanded, and concrete is poured between the inner mold 25 and the inner wall surface of the tunnel. As the concrete pouring device, for example, the inner mold 25
A concrete nozzle is used to supply concrete from a pipe-shaped nozzle extending parallel to the top of the container. Concrete flows down on both sides and accumulates, eventually filling gaps,
It is reinforced concrete in a dome shape. In addition, the front end side of the inner formwork 25 is closed by the end frame 30 so that concrete does not leak. In the figure, reference numeral 31 denotes cast concrete.

Since the concrete lining work and the curing of the concrete take time, the concrete placing device 21 is stopped at that position for a while, but as mentioned above, the excavation and the assembling of the support work are performed in parallel. Done. Further, the transport vehicle 27 passes through the inside of the stopped concrete placing device 21 and supplies the material forward through the transfer vehicle 26. The concrete is cast on the bottom of the tunnel (invert) behind the concrete casting device 21.

The retaining device 10 is used when the ground 15 has low self-sustainability, such as when excavation work is suspended. That is, the retaining device 10 comes to the front end of the preceding carriage 1 and is fixed, and the retaining member 12 is pushed forward by the jack 14 and pressed against the ground 15.

When the excavation of a predetermined length is completed and the excavation is completed, the rail 2 is extended on the bottom surface of the tunnel, and the preceding bogie 1 is advanced forward.

In the above embodiment, the leading bogie 1 is provided with the rebar assembling device 4 as a device for facilitating the support work, but may be further provided with a holding device for the H-shaped steel 29 and the like.

[0018]

According to the tunnel excavator of the present invention, a preceding bogie for performing excavation and shoring work, a concrete placing device for performing concrete lining, and a transfer bogie that freely moves between them. , And the excavation, assembling of the shoring, and the concrete placing can be performed independently in parallel and as a series of operations, so that the efficiency of tunnel excavation can be improved. In addition, the mechanization of the shoring and assembling work can reduce the burden on the worker.

[Brief description of the drawings]

FIG. 1 is a perspective external view of a tunnel excavator according to one embodiment.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 preceding bogie 4 rebar assembling apparatus 7 transfer stand 8 rebar 10 retaining device 12 retaining member 15 ground 20 excavator 21 concrete placing device 25 inner formwork 26 transfer truck 27 transporting cart 28 conveyor 29 H-shaped steel 31 casting Concrete

Continued on the front page (72) Inventor Toshio Takasaki 1-3-15 Awaza, Nishi-ku, Osaka-shi, Osaka Kashima Construction Co., Ltd., Osaka Branch (72) Inventor Koichi Tsukamoto 21-, Nagatake-cho, Shichiku, Kita-ku, Kyoto-shi, Kyoto 4 (72) Inventor Shigeru Nishitake 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Prefecture Inside Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Yoshiho Tachibana 1-chome, Wadasakicho, Hyogo-ku, Kobe-shi, Hyogo Prefecture No. 1 No. 1 Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (58) Fields surveyed (Int. Cl. ⁷ , DB name) E21D 9/10 E21D 9/06 302 E21D 11/10 E21D 9/06 301

Claims (1)

(57) [Claims] The present invention comprises a preceding truck, a rear concrete placing device, and a transfer truck that moves between the preceding truck, and the preceding truck includes an excavator used for excavation of ground, A reinforcement assembly device for supplying reinforcement to the shoring provided along the inner wall surface of the tunnel is mounted, and the transfer truck transports materials and the like to the concrete placing device or the preceding truck by the transfer truck. A tunnel drilling rig characterized by being delivered.