JPH05321571A - Tunnel excavator - Google Patents

Abstract

PURPOSE:To make excavation, assembly of timbering and placement of concrete as a series of work in excavation work of a tunnel and to improve excavation efficiency. CONSTITUTION:A tunnel excavator is constituted of a preceding truck 1, a backward concrete placement device 21 and a loading truck 26 moving back and forth between them, and an excavator 20 and a reinforcing bar built-up device 4 are mounted on the preceding truck 1. A conveying truck 27 for materials can be delivered to the preceding truck 1 and concrete placement device 21 by the loading truck 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavator which is capable of successively excavating the ground, assembling supporting works, and placing concrete in excavating a tunnel.

[0002]

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

[0003] Later, concrete lining is performed over the supporting work, but this work takes time because it requires concrete curing and the like, and even when it is mechanized, it is independent of the excavation process. We need to be able to do it. Conversely, in terms of excavation efficiency, it is desirable that the excavation work can proceed independently.

[0004]

SUMMARY OF THE INVENTION The present invention has been made as a subject to meet the demands in the conventional tunnel excavation work as described above, and is constituted by a preceding bogie and a rear concrete placing device. , A transfer carriage that moves between them, and the preceding carriage has a rebar for the excavator used for excavation of the ground and the support provided along the inner wall surface of the excavated tunnel. A rebar reassembling device for supplying is mounted, and a transporting trolley for transporting materials and the like is delivered to the concrete placing device or the preceding trolley by the transfer trolley.

[0005]

According to the tunnel excavating device having the above-described structure, excavation of the natural ground is performed by the excavator on the preceding bogie. Also, for the support work provided on the inner wall of the excavated tunnel,
Reinforcing bars are supplied and installed by the reinforcing bar assembling device.
On the other hand, in the rear, concrete is placed on the inner surface of the tunnel while covering the support work with the concrete placing device. During this time, the excavation independently proceeds. The carrier truck that moves from the rear of the concrete placing machine is moved to the transfer truck through the concrete placing machine, and is moved to the rear end of the preceding truck together with the transferring truck, and the preceding truck is moved from above the transferring truck. Transfer to the top and supply rebar etc.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 shows a perspective external view of an apparatus according to an embodiment. Reference numeral 1 is a leading cart, which is capable of traveling 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 body 5 of the reinforcing bar assembling device 4 is movably mounted on the rails 3. A rack 6 is provided in an arc shape on the peripheral surface of the arm-shaped frame body 5, and a transfer table 7 is provided so as to be movable using the rack 6 as a rail. The reinforcing bars 8 are placed on the carrier table 7 and transported. The reinforcing bars 8 are assembled in a wire mesh shape.

A rail 9 is laid inside the rail 3 on the preceding bogie 1, and a self-propelled mountain retaining device 10 is mounted on the rail 9. The Yamadome device 10 is 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
Driven by 4. This mountain retaining device 10 is a front ground 1
It is possible to pass through the rebar assembling device 4 in order to move forward with respect to No. 5 and to stand by at the rear when unnecessary. At the rear of the mountain retaining device 10, the device 10 is connected to the rail 9
It is equipped with a rail clamp device 16 for fixing to. A holding device 18 is provided at the front end of the preceding bogie 1 for holding the retained member 17 protruding to the front surface of the frame body 11 for holding the mountain retaining device 10 that has reached the forward end.

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

A concrete placing device 21 is located behind the excavated tunnel. In the figure, the positions are shown close to each other for convenience of expression, but actually they are located further rearward. The concrete placing device 21 is supported by a base 22 which is moved on the floor of the tunnel, a support frame 23 built on the base 22, a jack 24 provided on the support frame 23, and the like. An inner formwork 25 along the inner wall of the tunnel in which the wall is built, and a concrete pouring device (not shown) for pouring concrete between the outer peripheral surface of the inner formwork 25 and the inner wall of the tunnel. Is becoming The inner mold 25 can be expanded and contracted by the jack 24 and the like.

A transfer carriage 26 is mounted on the rail 2 between the preceding carriage 1 and the concrete placing device 21. The transfer carriage 26 is for transferring a carrier carriage 27 that conveys materials such as H-shaped steel and rebar 8. The transfer carriage 26 is connected to the front end of the concrete placing device 21 to transfer the concrete placing device 21 to and from the concrete placing device 21. The carriage 27 can be delivered to and from the carriage 26 and is connected to the rear end of the preceding carriage 1 so that the carriage 2 between the preceding carriage 1 and the transfer carriage 2
Allows delivery of 7. The material is supplied to the carrier 27 at the rear of the concrete placing device 21, for example, at the entrance of the tunnel.

Next, a concrete lining work for assembling concrete for excavation and support by the tunnel excavating device having the above-mentioned structure will be described. The forward ground 15 is excavated by the excavator 20 located at the front end of the preceding bogie 1. Excavated rocks, soil discharge,
That is, the sliding out is performed by the conveyor 28 arranged on the floor surface of the tunnel.

[0012] In parallel with the excavation work, support work is installed on the excavated tunnel inner wall. The supporting and assembling work is performed by assembling the H-shaped steels 29 in an arch shape at predetermined intervals along the inner wall surface of the tunnel and disposing the reinforcing bars 8 between the H-shaped steels 29. The rebar 8 is attached to the lower side surface relatively easily by an operator, but the rebar 8 is attached to the upper side because the rebar 8 is large and difficult to handle. It is mounted on the table 7 and is carried to the target installation site by the carrier table 7 for installation work.

Further toward the rear, concrete lining work is performed in parallel with the above work. That is, the inner formwork 25 of the concrete placing device 21 is expanded, and concrete is poured between the inner formwork 25 and the inner wall surface of the tunnel. As a concrete pouring device, for example, an inner mold 25
The one that supplies concrete from a pipe-shaped nozzle that extends parallel to the upper part of is used. Concrete flows down to both sides and accumulates, eventually filling the gap,
It is a dome-shaped concrete lining. In addition, the front end side of the inner formwork 25 is closed by a gable frame 30 so that concrete does not leak. In the figure, 31 is the cast concrete.

Since this concrete lining work and concrete curing take time, the concrete placing device 21 is stopped at that position for a while. Is done. Further, the carrier truck 27 passes through the inside of the concrete placing device 21 that is stopped, and supplies the material forward through the transfer truck 26. The concrete is poured into the bottom of the tunnel (invert) behind the concrete placing device 21.

The mountain retaining device 10 is used, for example, when the excavation work is stopped or when the independence of the ground 15 is low. That is, the mountain retaining device 10 comes to the front end of the preceding bogie 1 and is fixed, and the mountain retaining member 12 is pushed forward by the jack 14 and pressed against the natural ground 15.

When the excavation for a predetermined length is completed and the slide-out is completed, the rail 2 is extended to the bottom surface of the tunnel and the preceding bogie 1 is moved forward.

In the above embodiment, the preceding bogie 1 is provided with the reinforcing bar assembling device 4 as a device for facilitating the supporting work, but it may be equipped with an H-shaped steel 29 holding device.

[0018]

According to the tunnel excavating device of the present invention, a preceding bogie for excavating and supporting works, a concrete placing device for lining concrete, and a transfer bogie freely moving between them. Since the construction of excavation, assembling of support work, and placing of concrete can be performed independently in parallel and as a series of operations, the efficiency of tunnel excavation work can be improved. Also, the mechanization of the support work assembly work can reduce the burden on the worker.

[Brief description of drawings]

FIG. 1 is a perspective external view of a tunnel excavating device according to an embodiment.

[Explanation of symbols]

 1 Preceding bogie 4 Reinforcing bar assembling device 7 Conveying platform 8 Reinforcing bar 10 Mountain retaining device 12 Mountain retaining member 15 Ground excavator 20 Excavator 21 Concrete placing device 25 Inner form 26 Transfer truck 27 Conveyor truck 28 Conveyor 29 H-shaped steel 31 Casting Concrete

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Takasaki 1-3-15 Awaza, Nishi-ku, Osaka City, Osaka Prefecture Kashima Construction Co., Ltd. Osaka Branch (72) Inventor, Koichi Tsukamoto Shichitake, Kita-ku, Kyoto City, Kyoto Prefecture Machi 21-4 (72) Inventor Shigeru Nishidake 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Inventor Kaho Tachibana Wadazaki-cho, Hyogo-ku, Kobe-shi, Hyogo 1-1-1 Mitsubishi Heavy Industries, Ltd. Kobe Shipyard

Claims (1)

[Claims] 1. A leading trolley, a rear concrete placing device, and a transfer trolley moving between these, and the leading trolley includes an excavator used for excavation of the ground and an excavator. A reinforcing bar assembly device that supplies reinforcing bars to the support work provided along the inner wall surface of the tunnel is mounted, and the transfer cart transports the material etc. to the concrete placing device or the preceding cart. A tunnel excavation device characterized by being handed over.