JPH0868290A - Jumbo for tunnel excavation - Google Patents

Abstract

PURPOSE: To promote safety and efficiency of work by installing a drill, a for-a-pile driving device, a concrete spraying device, etc., on a jumbo traveling on a rail, and excavating a tunnel while driving a pile in the upper surface thereof. CONSTITUTION: A for-a-pile 6 is driven in the upper surface of a tunnel by a for-a-pile driving device consisting of a drill 19, etc., provided to the front of a trestle 3 of a jumbo 1 for excavating a large sectional tunnel 50. Side piles are driven to the sides of the tunnel by side pile driving devices 9 to both side frames 3a of the holder 3. The jumbo is driven while protecting the peripheral bedrock, at the same time, concrete is sprayed to the surface of the excavated bedrock with a spraying machine 15 to protect, and various kinds of works can be carried out with one device. By the constitution, excavation work of the tunnel can be carried out safely and efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumbo for excavating a tunnel, and more particularly to a jumbo for excavating a tunnel having a function of protecting surrounding rocks.

[0002]

2. Description of the Related Art In a so-called mountain tunnel in which a tunnel is excavated and formed in a stable ground such as bedrock ranging from soft rock to hard rock, various excavating heavy machines such as crushing the face of the tunnel by blasting or rock drilling machine. A method of digging a tunnel while crushing or excavating using a method is adopted.

As a heavy machine for efficiently performing excavation work on such a mountain tunnel when a tunnel having a large cross section is constructed, an excavation heavy machine called a jumbo has been conventionally known. This tunnel excavation jumbo is
For example, as shown in Japanese Examined Patent Publication No. 63-57598, a self-propelled carriage capable of traveling mainly on the bottom of a tunnel,
It is composed of a jumbo main body installed so as to be able to move up and down with respect to this self-propelled carriage, and a plurality of boring booms provided on the jumbo main body and arranged to face the tunnel face.

According to this jumbo for tunnel excavation, the tunnel is efficiently excavated by excavating the face by loading explosives into a large number of holes formed in the face by the boring boom and exploding the face. You can move on.

[0005]

Even in mountain tunnels in which such a jumbo for excavating tunnels is adopted, geological features such as rocks and landslides with many cracks and slip surfaces, soft rocks and expansive rocks with low strength, etc. There is a possibility that the ground may pass through unfavorable conditions, and if excavation work by a tunnel excavation jumbo is carried out in such ground, there is a risk of causing a risk of collapse or collapse of surrounding rocks. When excavating such ground, it is necessary to reinforce the ground in front of the face, especially the ground at the top of the tunnel, in order to prevent the ground from collapsing or collapsing. The fore piling method is known as a means for reinforcing such natural ground.

[0006] That is, this forepiling method is
A large number of linear cores made of, for example, steel members or hardened bodies, i.e., fore piles, are driven along the top face of the tunnel from the face face of the tunnel toward the front ground, and excavations formed by such fore piles. The excavation work is carried out after the excavation ground is first protected by the roof covering the ground.

However, in a mountain tunnel where a jumbo for tunnel excavation is used for excavation work while preserving and protecting the excavated ground by the fore piling method, such a fore pile is driven by a dedicated machine. Since it is necessary to install and form the tunnel face, it is necessary to replace it with a jumbo for tunnel excavation on the face of the face, so that the congestion of the heavy machinery may occur and the work may be dangerous. It will lead to stagnation.

Further, in the case of a tunnel having a large cross section, in order to drive the fore pile, a large-sized driving machine must be used because of its scaffolding and the like. It is difficult to drive a fore pile quickly and accurately.

Therefore, the present invention has been made by paying attention to the above-mentioned conventional problems, and avoids congestion of heavy machinery and stagnation of excavation work, and easily and accurately receives the excavation ground. An object of the present invention is to provide a jumbo for tunnel excavation that enables safe excavation of the face of a tunnel.

It is another object of the present invention to provide a jumbo for tunnel excavation which enables safer excavation work of the tunnel by promptly protecting the top surface of the tunnel immediately after excavation. .

A further object of the present invention is to provide a jumbo for excavating a tunnel which can simultaneously reinforce the ground on the side of the tunnel.

[0012]

The jumbo for tunnel excavation of the present invention has been made to achieve the above-mentioned object. A jumbo mount that can move in the axial direction of the tunnel and a jumbo mount in front of the jumbo mount are provided. A plurality of drilling devices provided for drilling the face, a slide track for the fore pile extending along the shape of the top surface of the tunnel in the tunnel crossing direction above the jumbo mount, and the slide for the fore pile. It is supported by a track and is placed opposite to the top of the tunnel face, and by moving along the slide track for the fore pile, the fore pile is driven into the ground in front of it along the top of the tunnel. It is characterized by having a fore pile placing device.

Further, the jumbo for tunnel excavation of the present invention further comprises a blowing slide track extending along the shape of the top surface of the tunnel in the transverse direction of the tunnel above the jumbo mount, and the sliding slide track. While being supported and arranged to face the top end surface, by moving along the slide path for the fore pile,
It is preferable to further include a spraying machine for spraying the sprayed concrete along the top surface of the tunnel.

Further, the tunnel excavating jumbo of the present invention may be provided with a side pile driving device on a side of the jumbo mount, the side pile driving device being opposed to the ground on the side.

[0015]

According to the jumbo for tunnel excavation of the present invention,
While moving the fore pile placing device sequentially on the slide track for the fore pile provided along the shape of the top face of the tunnel above the jumbo mount, the fore pile was moved along the top end of the tunnel by the placing device. It can be easily driven into place. That is, the slide track for fore pile is firmly supported and fixed in the vicinity of the top end of the face by using a jumbo mount as a scaffold, and the fore pile placing device uses a slide track having a shape along the top end face of the tunnel. While moving sequentially as a guide, a large number of fore piles can be accurately driven into a predetermined position along the top end surface.

Further, by providing a spraying slide track around the upper part of the jumbo mount and moving the spraying machine of the spraying concrete along the slide track, the top surface of the tunnel after excavation can be protected quickly. .

If a side pile driving device is provided on the side of the jumbo mount so as to face the ground on the side, excavation work can be performed while simultaneously reinforcing the ground on the side of the tunnel. You can

[0018]

The present invention will be described below with reference to the illustrated embodiments. The jumbo 1 for tunnel excavation shown in FIGS.
It was used in the so-called upper half advanced method of excavating the upper half part 51 of the tunnel 50 in advance, and mainly used for the rail 2 laid on the bottom plate of the tunnel upper half part 51 that was excavated earlier, that is, the upper surface of the tunnel lower half part 52 A jumbo mount 3 that can travel along the tunnel axis, a plurality of drilling drifters 19 as a drilling device that is provided in front of the jumbo mount 3 and that drills a face face, and the jumbo mount 3 It is supported by front and rear guide cells 13 and 14 as slide tracks for the fore pile extending along the arch-shaped top end surface of the tunnel 50 in the transverse direction in the upper periphery and the guide cells 13 and 14 before and after such guide cells. It is placed opposite the top of the tunnel face and slides along these guide cells 13, 14. Ri, is constituted by a fore pile hitting set device 5 driving a sequential number of fore piles 6 to the front of the natural ground along an arcuate tunnel top end face.

The jumbo frame 3 has a frame structure in which H-shaped steel and other steel materials are assembled and joined in a sectional shape that fits in the shape of the upper half 51 of the tunnel, and wheels 54 are provided at the lower ends of the columns 53. While traveling on the rail 2 by means of the above, at the rear part thereof, there is provided a driving / control room 55 having a facility for driving and controlling the drilling drifter 19 and the fore pile placing device 5, and other devices and equipment. There is. Further, the upper portion of the jumbo frame 3 is covered with an arch-shaped protector 4, which ensures the safety of the work and the equipment therebelow. The drive / control room 55 also has a function as a counter weight, and contributes to the stability of the jumbo 1 during the drilling work or the fore pile placing work by the tunnel excavating jumbo 1.

On the other hand, the hole drilling lifter 19 is a hole drilling lifter boom base 7 attached to the tip of the jumbo base 3.
From the drifter boom 58 having a bendable joint
It is located in front of the jumbo mount 3 via the through hole, and is arranged so as to face the face face, and by driving from the drive / control chamber 55, a face hole is formed at a predetermined position for loading explosive for blasting on the face face. To do. It is also possible to replace the hole-drilling drifter 19 with a rock breaker or the like and directly perform excavation work on the face. That is, the drilling device according to the present invention also includes other excavating devices such as a rock breaking machine. Further, a supporting work handling device 21 is further provided at the tip of the jumbo frame 3, so that various supporting work assembling work can be performed.

The fore pile driving device 5 is provided with front and rear fore pile drifter boom bases 56, 57 which are supported on the front and rear guide cells 13, 14 and slide along the guide cells 13, 14, respectively. The guide rod 18 is supported by the drifter boom bases 56 and 57, and the fore pile drifter 17 extends forward of the guide rod 18.
That is, each of the front and rear drifter boom bases 56, 57 is provided with a jack mechanism that can be moved up and down, and can be easily and accurately positioned toward the top end portion of the tunnel face, and the guide rod 18, that is, the fore pile 6 can be positioned. The driving angle can be adjusted arbitrarily. Further, the drifter boom bases 56 and 57 are connected to the guide cell 13,
By successively sliding along 14 the number of fore piles 6 along the arch-shaped tunnel top surface
It is possible to cover the tunnel excavation portion in front of the face face with a roof shape, and to drive it sequentially and accurately by the forelift drifter 17.

Further, as shown in FIG. 4, the jumbo 1 for tunnel excavation of this embodiment has the front guide cell 13 as shown in FIG.
Of the spraying guide cell 12 having the same arch-like shape as that of the spraying machine 15 disposed toward the top end surface immediately after the excavation while moving along the spraying guide cell 12. By spraying, the arch-shaped top end face after excavation can be protected quickly and easily.

Further, as shown in FIG. 5, the tunnel excavating jumbo 1 of this embodiment has side piles mounted on the frames located on both sides of the jumbo frame 3 via side pile drifter boom bases 9. A drift lifter boom 10 is provided so that a side pile 8 for reinforcing the ground can be placed on the side of the tunnel 10. The side pile 8 is a linear core material made of, for example, a steel member or a hardened body that is driven into the ground on the side of the tunnel 10, and includes so-called side piles, micro piles, foot piles, and the like.

According to the tunnel excavating jumbo 1 of the present embodiment having the above-described structure, even when passing through a rock with poor geological conditions, a large number of fore piles 6 can be accurately provided by the function of the jumbo 1 itself. By driving in, an arch-shaped roof that covers the excavated ground is formed, which allows safe and easy tunnel excavation work while receiving the surrounding ground in advance.

Further, the arch-shaped top end surface after excavation is rapidly protected by spraying concrete with a spraying machine 15, and the ground on the side of the tunnel is struck by the side pile 8. The tunnel excavation work can be carried out more safely while being protected.

According to the jumbo 1 for tunnel excavation of this embodiment, the drilling work, the fore pile placing work, the side pile placing work and the like can be arbitrarily selected and separately performed. It is also possible to carry out these operations in parallel by arbitrarily combining a plurality of operations.

6 and 7 show another embodiment of the jumbo for tunnel excavation of the present invention. That is,
The jumbo 1 for tunnel excavation of this embodiment is a tunnel 5
0 is used in a so-called limited upper half advanced method of excavating the limited upper half portion 60 in advance, and while having the same configuration as the jumbo 1 for tunnel excavation shown in FIGS. In order to enable only excavation work, of the jumbo 1 for tunnel excavation shown in FIGS. 1 to 3, both side frames 3a that are projected as triangular blade portions.
Also, the detachable side portion 1a including both side portions 4a of the protector 4 supported by the protector 4 is removed. In other words, the jumbo 1 for tunnel excavation can change the height division according to the natural condition.

The jumbo for tunnel excavation of the present invention is not limited to the one used in the above-mentioned upper-half advanced construction method or limited upper-half advanced construction method, and the back splitting is performed according to the shape of the tunnel cross section to be excavated. By changing it, it can be applied to other tunnel construction methods, for example, when excavating the entire cross section of the tunnel at the same time.

Incidentally, in FIG. 1 or FIG.
Is a wheel type jumbo disposed below the jumbo base 3 separately from the jumbo 1 for tunnel excavation of the above-mentioned embodiment. For example, the upper half advanced method or the limited upper half advanced method is a bench cut method. This is used when excavating the lower face in parallel with the excavation of the upper face by the tunnel excavating jumbo 1.

[0030]

In summary, the multi-functional jumbo of the present invention comprises a fore-pile slide track extending along the shape of the top surface of the tunnel in the transverse direction of the tunnel in the upper periphery of the jumbo mount, and the fore-pile slide track. It is supported and is arranged to face the top of the tunnel face, and is equipped with a fore pile placing device that moves along the slide track for the fore pile. By driving the fore piles one after another with high accuracy, it is possible to form a roof for receiving the front covering the excavated ground. That is, since the excavation ground is accurately pre-received by itself, it is possible to safely excavate the tunnel while avoiding congestion of the heavy machinery and stagnation of excavation work.

Further, by providing a spraying machine for spraying concrete that moves along a spraying slide track provided above the jumbo frame, the tunnel crown surface after excavation can be protected quickly while the tunnel is safer. You can go digging.

Further, by providing a side pile driving device on the side of the jumbo mount facing the ground on the side, the ground on the side of the tunnel is reinforced by the side pile and the tunnel is safer. You can go digging.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a tunnel excavating jumbo according to an embodiment of the present invention is arranged in a tunnel.

FIG. 2 is a side view showing a jumbo for tunnel excavation according to an embodiment of the present invention.

FIG. 3 is a plan view showing a state in which a tunnel excavating jumbo according to an embodiment of the present invention is arranged in a tunnel.

4 is a cross-sectional view taken along the line AA of FIG.

5 is a cross-sectional view taken along the line BB of FIG.

6 is a cross-sectional view showing a jumbo for tunnel excavation according to another embodiment of the present invention, showing a configuration of a portion corresponding to a cross section taken along the line AA of FIG.

FIG. 7 is a cross-sectional view showing a jumbo for tunnel excavation according to another embodiment of the present invention, showing a configuration of a portion corresponding to a cross section taken along the line BB of FIG.

[Explanation of symbols]

1 Jumbo for tunnel excavation 1a Side part 2 Rail 3 Jumbo frame 3a Both sides frame 4 Protector 5 Support handling device 6 Fore pile 7 Drifter boom platform for drilling 8 Side pile 9 Drifter boom platform for side pile 10 Drifter boom for side pile 11 wheel jumbo 12 guide cell for spraying (slide track for spraying) 13,14 guide cell for fore pile (slide track for fore pile) 15 spraying machine 17 drifter for fore pile (drilling track) 18 guide rod (drilling device) ) 19 Drifter for drilling (drilling device) 21 Supporting and handling device 50 Tunnel 51 Upper half of tunnel 52 Lower half of tunnel 55 Drive control room 56, 57 Drifter boom platform (Drilling device) 60 Upper half of tunnel limited

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoichi Moriya 2-3 Kandajimachi, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office

Claims (3)

[Claims] 1. A jumbo mount that can move in the axial direction of the tunnel, a plurality of drilling devices that are provided in front of this jumbo mount and drill holes in the face of the face, and in the tunnel crossing direction above the jumbo mount. , A slide track for fore piles extending along the shape of the tunnel top face, and a slide track for fore piles, which is supported by the slide track for fore piles and is arranged to face the top end of the tunnel face, and along the slide track for fore piles A jumbo for tunnel excavation, characterized by comprising a fore pile placing device for sequentially moving the fore pile to the ground in front of the tunnel by moving it. 2. A blowing slide track extending along the shape of the tunnel top surface in the tunnel crossing direction above the jumbo frame and a support provided by the blowing slide track and arranged to face the tunnel top surface. The jumbo for tunnel excavation according to claim 1, further comprising a spraying machine that sprays sprayed concrete along the top surface of the tunnel by moving along the slide track for the fore pile. . 3. The side pile driving device is further provided on a side of the jumbo mount so as to face the ground on the side, and the side pile driving device is further provided. Jumbo for tunnel excavation.