JPH05321586A - Tunnel excavator - Google Patents

Abstract

PURPOSE:To enable the excavation of a tunnel and the lining of concrete at once and to promote efficiency of excavation work. CONSTITUTION:A device is divided into the front and rear parts, both of them are detachable, and a messer 12 passing through the ceiling of a bedrock, a side shoring device 21 shoring the side of a tunnel and a side concrete placement 14 placing concrete to a the lower half of the side, etc., are provided to the front body 1 carrying excavators 17 and 26 to the front thereof. An upper half concrete placement device 30 placing concrete in the shape of a circular arc to the hopper half of the tunnel and a gripper 33 fixing the rear body 2 to the tunnel are provided to the rear body 2. Excavation and concrete placement to the side are carried out at the front and, at the same time, and concrete placement to the upper half of the tunnel is made at the rear.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavating device capable of efficiently excavating a tunnel.

[0002]

2. Description of the Related Art Among tunnel excavation methods, a full-section excavation method is known as an efficient method. This method is a method of excavating the entire cross section of the tunnel at once for each cycle.

[0003]

However, with this method, it is necessary to maintain the stability of the ground after excavation and earth removal until the support work is completed. In other words, since the entire cross section is opened at once, it is necessary to bear the large load from the ground.

Further, when the inner wall surface of the tunnel is lined with concrete, there is a problem that the excavator cannot be advanced while the concrete is being cured.

[0005]

In order to solve the above-mentioned problems, in the present invention, the front main body and the rear main body are connected to each other by extension / contraction drive means so that they can be relatively approached and separated from each other, and A plurality of messels that support the ceiling surface of the tunnel are provided so that they can move back and forth, and a mountain retaining device that presses the mountain retaining member against the side surface of the tunnel is provided on the side surface of the front body, and the lower half of the side surface covers the lower half side surface of the tunnel. A side concrete pouring device for working is provided, and the rear body is provided with an upper half concrete pouring device for lining the upper half part of the tunnel,
The tunnel excavating device was constructed by providing fixing means for fixing the rear body to the tunnel.

[0006]

In the tunnel excavation by the excavation device, a messel is inserted in the upper part of the ground in front, and the excavation of the entire cross section is performed with the ground being stabilized. Excavation proceeds by moving the front body relative to the rear body. At this time, the rear body is fixed by the fixing means, and a reaction force for propelling the front body is received. In the rear main body, the upper half of concrete is placed to cover the upper half of the tunnel and stand by for curing.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the tunnel excavating device according to the present invention will be described with reference to the drawings. FIG. 1 shows a partially crushed perspective view of an apparatus according to an embodiment. The tunnel excavating device is composed of a front part for excavating the tunnel and lining the lower half side surface, and a rear part for lining the upper half part. 1
Is a front main body (frame body) that forms the base of the front part, and 2 is a rear main body (frame body) that forms the base of the rear part, both of which are connected by propulsion jacks 3 and 4 which are expansion and contraction drive means for propulsion. There is. That is, the propulsion jack 3 is installed on the rear side of the floor (base) 5 of the front main body 1, the movable portion 6 thereof is connected to the front of the rear main body 2, and The propulsion jack 4 is installed on the rear side of the support base 7 in the middle of the vertical direction, and the movable portion 8 thereof is provided on the support base 9 of the rear main body 2 and the frame base 1 is provided.
It is connected to the front of 0. The propulsion jacks 3 and 4 are provided on the left and right, respectively, although not shown in the figure.

On the support base 7 of the front main body 1, a frame 11 having an arched upper part is constructed.
On the upper surface of 1a, a plurality of messels 12 are arranged in parallel in the front-back direction. As shown in FIG. 2, the messels 12 are assembled so that the edges of adjacent ones overlap each other.
The arch portion 11a is provided with the same number of the jacks 13 for moving the messels as the messels 12, and the movable parts 13a thereof are respectively coupled to the front and rear surfaces of the messels 12. Therefore, by the operation of the jack 13 for moving the Messel,
The messels 12 move forward or backward by using the mutually adjacent ones as guides.

A side surface concrete pouring device 14 is provided on the front lower side surface of the front body 1. The concrete pouring device 14 is a concrete pouring device for pouring concrete between an inner formwork 16 that is pushed out and in by a hydraulic cylinder 15 to the side and an inner formwork 16 that is protruded to the side and the excavated side face of a tunnel ( (Not shown).

On the floor 5 of the front main body 1, a forward ground 19
The excavator 17 for excavating the lower half part of the is loaded. The excavator 17 employed here is mounted on a rail 18 so that it can move forward and backward with respect to the forward ground 19.
Also, on the floor 5, rocks excavated by the excavator 17,
A conveyor for discharging soil is installed.

On both side surfaces of the upper part of the front main body 1, there are provided side surface mountain retaining devices 21 through which the mountain retaining members 20 come in and out. The earth retaining member 20 presses the excavated surface of the tunnel to stabilize the ground. In addition, at the front part on the support base 7 of the front body 1, the mountain retaining device 2 for the front ground 19 is provided.
Two are provided. The mountain retaining device 22 is provided with a large number of jack driving mountain retaining members 25 on a frame platform 24 that can move on a rail 23 laid on the support platform 7. Of course,
The frame base 24 is fixed to the rail 23 during mountain fastening.

The frame 24 of the mountain retaining device 22 on the support 5.
An excavator 26, which mainly contributes to excavation of the upper half of the forward ground 19, is carried into the inside of the. The excavator 26 rides on a rail 27 laid inside the rail 23 and can move forward and backward with respect to the natural ground 19. Behind the excavator 26, a conveyor for earth removal is installed. As described above, the propulsion jack 4 is installed near the rear portion of the support base 5.

The rear body 2 is equipped with an upper half concrete placing device 30. The upper half concrete placing device 30 includes an inner mold 31 forming an arc surface along the tunnel ceiling, and a concrete pouring device (not shown) for pouring concrete between the inner mold 31 and the tunnel wall surface. It consists of As shown in FIG. 3, the inner frame 31 is attached to a frame base 10 having a substantially trapezoidal shape fixed on the support base 9 by a jack 32 so as to be able to move in and out in the radial direction.
When all the inner mold frames 31 are projected by a predetermined amount, the adjacent ones are in close contact with each other and the outer peripheral surface forms a circular arc surface. As described above, the movable portion of the propulsion jack 4 is connected to the front surface of the frame base 10.

A gripper 33 is provided in the lower rear half of the rear body 2 as a rear body fixing means that projects laterally and presses the tunnel wall surface. The pressing force of the gripper 33 is obtained by the jack 34 or the like. A conveyor provided in the front main body 1 penetrates through the rear main body 2.

Next, the tunnel excavation work by the tunnel excavation device having the above-mentioned configuration will be described. First of all, forward ground 1
An upper half peripheral portion of 9 is excavated in an arc shape. Next, FIG. 4 (A)
As shown in FIG. 3, the jack 13 for moving the messel 12 is operated to cause the messel 12 to penetrate into the excavated arc-shaped space. The penetration of the messel 12 supports the earth pressure at the tunnel ceiling.

Next, as shown in FIG. 4B, excavation and earth removal of the entire tunnel section are performed by the upper and lower excavators 17 and 26. When the excavation of the entire cross section of the tunnel of the prescribed length is completed, concrete is placed at the bottom (invert) of the tunnel. Further, at the time of excavation, the side surface concrete placing device 14 connects the both end portions of the bottom placing concrete 51 on which the concrete has already been placed to perform the concrete placing on the lower half portion of the side surface. On the other hand, in the rear main body 2, the upper half concrete pouring device 30 is connected to the upper end of the side lower half pouring concrete 52 that has already been poured, and the arc-shaped upper half concrete is poured. That is, the lining of concrete is performed in parallel at each stage, and the closing of the tunnel by the concrete is completed in the rear main body 2. In addition, when the self-sustainability of the ground 19 is poor, the side surface before the concrete lining is the side surface retaining device 2
Hold it down at 1.

Excavation can proceed during curing of the concrete 53 cast in the upper half. That is, the gripper 33 in the rear main body 2 is laterally projected, the side surface lower half casting concrete 52 is pressed to fix the rear main body 2, and the propulsion jacks 3 and 4 are extended in this state. The front main body 1 moves away from the rear main body 2, and the front ground 1
The excavation of 9 can proceed. Forward ground 1
The excavation of 9 is performed in the same procedure as described above. The change of the excavation direction can be dealt with by changing the operation amount of the left jacks 3 and 4.

After the front main body 1 has moved by a predetermined amount and the curing of the upper half cast concrete 53 is completed, the gripper 33 in the rear main body 2 is released from the side wall to propel the jacks 3, 4.
4 to operate the front body 1 as shown in FIG. 4 (C).
The rear main body 2 is pulled toward. At this time, the front body 1
The mountain clasp member 20 of the side surface mountain clasping device 21 is pressed against the wall surface of the tunnel to receive a reaction force.

The above embodiment is merely an example, and various constituent members can be variously modified without impairing their functions. The manner of assembling the jack and the hydraulic cylinder is not limited to the above. For example, the propulsion jacks 3 and 4 may be installed on the rear body 2 side. The excavator is not limited to the type shown in the embodiment, and a free-section excavator or the like can be used.

[0020]

According to the tunnel excavating device of the present invention, the front part of the device and the rear part of the device for performing different works are divided,
In addition, since they can move closer to and away from each other, propulsion and lining can be performed at the same time, which improves tunnel excavation efficiency and shortens the construction period. Further, since the messel is inserted into the ceiling portion before excavation, excavation can be performed while the ground is kept stable. Furthermore, since the concrete lining is performed in a space almost closed by the concrete placing device, the working environment is not polluted.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of a tunnel excavating device according to an embodiment is crushed.

FIG. 2 is a schematic front view showing an array of messels.

FIG. 3 is a front view of a rear body.

FIG. 4 is a schematic explanatory view of an excavation process.

[Explanation of symbols]

 1 Front main body 2 Rear main body 3, 4 Propulsion jack 12 Messel 13 Jack for moving Messel 14 Side concrete placing device 16 Inner formwork 17 Excavator 19 Rock mass 21 Side mountain retaining device 22 Mountain retaining device 26 Excavator 30 Above Half-concrete placing device 31 Inner formwork 33 Grippers 51, 52, 53 Placed 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 front main body and a rear main body are connected to each other by expansion and contraction drive means so that they can be relatively moved toward and away from each other, and a plurality of messels for supporting a tunnel ceiling surface are provided in an upper part of the front main body so as to be movable back and forth. While providing a mountain retaining device for pressing the mountain clasp member to the side of the tunnel on the side of the front body, the lower half of the side is provided with a side concrete placing device for lining the side of the lower half of the tunnel, and on the rear body, A tunnel excavating device comprising an upper half concrete placing device for lining an upper half of the tunnel and a fixing means for fixing a rear main body to the tunnel.