JP2002129875A - Tunnel boring machine and method of dismantling it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover structures which constitute a tunnel boring machine for reuse, using a method of dismantling the machine. SOLUTION: The cylindrical boring machine body 11 of the tunnel boring machine 10 comprises a front ring 15 and a rear ring 16 integrally connected together by welding, with the front ring 15 comprising approximately fan-shaped A-C rings 17 to 20 which can be circumferentially split from one another. A cutter drive 13 having a plurality of driving motors 12 is detachably attached to the body and a cutter head 14 is detachably attached to the cutter drive 13 so that it can be driven to rotate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavator for propelling a tunnel excavator to excavate a tunnel of a predetermined length, and then recovering a cutter head, a cutter driving device of the cutter head, an excavator body, and the like. And a method of dismantling the tunnel excavator.

[0002]

2. Description of the Related Art Generally, in a shielded excavator, a disk-shaped cutter head is rotatably mounted on a front portion of a cylindrical excavator body, and the cutter head is rotatably supported by a cutter driving device. On the other hand, a large number of shield jacks for advancing the excavator body are mounted on the rear portion, and an erector device for mounting a segment on the inner wall surface of the existing tunnel is mounted. Therefore, when the shield jack is extended while rotating the cutter head by the cutter driving device, the excavator body moves forward by obtaining the reaction force from the existing segment, and a number of cutter bits attached to the cutter head make the front ground clear. Drilling and
A tunnel can be formed.

When a tunnel is constructed in a predetermined construction section using such a shield excavator, a starting shaft and a reaching shaft are excavated in advance in this construction section, and the shield excavator is carried into the starting shaft. In a state where the excavation reaction force is secured in the starting shaft, excavation is performed along a predetermined route by penetrating the ground from the starting port. Then, when the shield excavator digs into the reaching shaft, the shield body is pulled out from the reaching hole formed in advance into the reaching shaft. In this way, a tunnel is constructed at a predetermined position.

[0004] The shield excavator that has reached the reaching shaft is dismantled and partly collected on the ground, while the rest is buried underground as a tunnel structure. That is, in the shield excavator, first, the cutter head is divided into small pieces by a gas cutter or the like, lifted up to the ground through a reaching shaft by a crane, and then the cutter driving device of the cutter head is similarly divided into small pieces by a gas cutter or the like. And is lifted to the ground by a crane through a reaching shaft. The shield jack, the erector device, the earth discharging device (such as a mud pipe, a mud pipe, an agitator, and a screw conveyor) are removed from the excavator body and lifted to the ground by a crane. On the other hand, the remaining excavator body is connected to the existing segment and buried as a part of the tunnel structure. Then, the cutter head that has been divided and lifted to the ground, the cutter driving device, and the like are temporarily discarded.

[0005]

However, from the viewpoint of the global environment, an increase in industrial waste due to waste treatment is not preferable, and reuse is desired. In this case, since the cutter head is pressed against the ground with its front surface being excavated, the cutter bit is greatly worn. In some cases, replacement of the cutter bit makes it possible to reuse the cutter bit. In addition, since the cutter driving device of the cutter head is disposed on the excavator body side separated by the bulkhead, the cutter driving device may be less damaged, and may be reused by maintenance. Therefore, at least reuse of the cutter head and the cutter driving device is desired. Furthermore, a sludge discharging device (for example,
(Agitator, screw conveyor, etc.) mounting bracket, earth pressure sensor, underground monitoring device, etc. are mounted, so it is desirable to collect and reuse the excavator itself rather than remove these various members. I have.

An object of the present invention is to solve such a problem, and to provide a tunnel excavator and a method of dismantling the tunnel excavator, which enable a structure constituting the excavator to be recovered and reused. Aim.

[0007]

According to a first aspect of the present invention, there is provided a tunnel excavator having a cylindrical excavator body which is capable of being divided into a plurality of sections along a circumferential direction, and an excavator body. A cutter driving device detachably mounted on a front portion of the excavator body and having a driving motor and an output transmission portion, and a rotatable drive disposed on a front portion of the excavator body and connected to an output transmission portion of the cutter driving device. A unique cutter head.

[0008] In the tunnel excavator according to the second aspect of the present invention, the excavator body is formed by integrally connecting front and rear rings,
The front ring can be divided into multiple parts along the circumferential direction,
It is characterized in that a part thereof can be disassembled on the inner peripheral side.

According to a third aspect of the present invention, the cutter head is detachably connected to an output transmitting portion of the cutter driving device.

According to a fourth aspect of the present invention, the cutter driving device is disposed on an inner peripheral side of a mounting flange of the excavator main body, and is connected to a plurality of connecting members divided in a circumferential direction by bolts or the like. It is characterized by being fastened.

According to a fifth aspect of the present invention, there is provided a method for dismantling a tunnel excavator, wherein the tunnel excavator is propelled to excavate a tunnel, and the tunnel excavator is stopped at a predetermined position where a predetermined construction section has been excavated. Separating the front cutter head and the cutter driving device from the cylindrical excavator body, disassembling the excavator body in a plurality of parts in the circumferential direction, and collecting the excavator body on the ground through the existing tunnel at the rear. It is.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic sectional view of a tunnel excavator according to a first embodiment of the present invention, FIG. 2 is a front view of an excavator body, FIG.
5 to 5 schematically show a method of dismantling the tunnel excavator of the present embodiment.

As shown in FIGS. 1 and 2, in a tunnel excavator 10 of the present embodiment, a cutter driving device 13 having a plurality of driving motors 12 is mounted on a front portion of a cylindrical excavator body 11, A cutter head 14 is rotatably supported by a cutter driving device 13. In this case, the excavator body 11 is formed by integrally connecting the front and rear ring portions 15 and 16 so that the front ring 15 can be divided into a plurality of pieces along the circumferential direction. Also, the cutter driving device 13
Are unitized and detachable from the excavator body 11, and a cutter head 14 is detachable from the cutter driving device 13.

That is, in the excavator body 11, a front ring 15 for mounting the cutter driving device 13 and the like and a rear ring 16 for mounting a shield jack and an elector device described later are integrally connected by welding. And can be easily separated by gas cutting or the like. The front ring 15 is composed of substantially fan-shaped A to C rings 17 to 20 which can be divided into a plurality (four in this embodiment) along the circumferential direction. That is, the A ring 17 is located at the lower part,
It comprises an arc-shaped outer peripheral portion 17a, a mounting flange portion 17b formed on the inner peripheral surface thereof, and a connecting flange portion 17c formed at both ends along the radiation from the center O. The B rings 18 and 19 are located on both sides, and are formed along the arc-shaped outer peripheral portions 18a and 19a, the mounting flange portions 18b and 19b formed on the inner peripheral surface thereof, and one end along substantially the radiation from the center O. Connecting flanges 18c, 19c and a connecting flange 18 formed parallel to each other at the other end.
d and 19d. Further, the C-ring 20 is located at an upper portion and includes an arc-shaped outer peripheral portion 20a, a mounting flange portion 20b formed on the inner peripheral surface thereof, and a connecting flange portion 20c formed at both ends in parallel with each other. .

The connecting flange portions 17c, 18
c, 18d, 19c, 19d, and 20c are closely adhered and fastened by bolts 21 so that the mounting flange 22 (the mounting flange portions 17b, 18b, 19b, 19b, The front ring 15 on which 20b) is formed is formed. When the bolt 21 is loosened, the C ring 20 can be disassembled from the front ring 15 to the inner peripheral side.

On the other hand, in the cutter driving device 13, a ring gear (not shown) is rotatably supported in a casing 23 having a box shape, and driving gears of a plurality of driving motors 12 mesh with each other. The ring gear extends forward to form a connection flange 24 as an output transmission portion, and a connection flange 25 of the cutter head 14 is fastened to the connection flange 24 by a bolt 26. The casing 23 of the cutter driving device 13 is fitted on the inner peripheral surface of the mounting flange 22, and is fastened by bolts 28 via a split flange 27 as a connecting member. The split flange 27 has a fan shape obtained by dividing a ring member having a predetermined width in the circumferential direction, and is fastened by bolts 28 in a state of being fitted to the outer peripheral groove 23 a of the casing 23 and being in close contact with the mounting flange 22.

At the rear of the excavator body 11, a mounting flange 29 is formed along the circumferential direction, and a plurality of shield jacks 30 are arranged on the mounting flange 29 along the circumferential direction. Is extruded rearward in the excavation direction and pressed against an existing segment constructed on the inner peripheral surface of the excavated tunnel, whereby the excavator body 11 can be advanced by the reaction force. Further, the excavator body 11
A swivel ring 31 is rotatably supported at the rear part, and an erector device 32 for assembling a segment is mounted on the swivel ring 31.

At the front end of the excavator body 11, a chamber 33 is formed at the rear of the cutter head 14, and a mud feed pipe and a drain pipe (not shown) are opened in the chamber 33 and an agitator is provided. Is mounted so that the earth and sand excavated by the cutter head 14 can be discharged to the outside.

Here, a tunnel excavation operation by the tunnel excavator 10 of the present embodiment configured as described above will be described.

In order to excavate and form a tunnel, first, a starting shaft having a predetermined depth is excavated at the excavation start position, a tunnel excavator 10 is loaded into the starting shaft, and a cutter head 14 is rotated by a drive motor 12. Meanwhile, the plurality of shield jacks 30 are extended, the excavator body 11 is advanced by a reaction force that is pressed against the reaction force receiver in the starting shaft, and the tunnel excavation work is started by excavating the standing wall of the starting shaft. Then, with the excavation of the ground by the cutter head 14, the excavated earth and sand is discharged from the chamber 33 to the outside by a mud pipe, and the segments S are assembled in a ring shape by the erector device 32 to construct a tunnel.

When a tunnel of a predetermined length is constructed by the tunnel excavator 10, excavation is stopped. In this state, first, the shield jack 30 and the elector device 32,
Remove and collect sludge pipe, sludge pipe, agitator, etc.
Subsequently, the bolts 26 are loosened to remove the cutter head 14 from the cutter driving device 13 of the excavator body 11, and the bolts 28 are loosened to remove the split flanges 27. 13 is removed. Then, the cutter driving device 13 is conveyed rearward through the inside of the excavator main body 11 by a winch or the like (not shown), and FIG.
As shown in FIG.
On the trolley A that is movable along the, move backward and collect it from the starting shaft onto the ground.

After the cutter driving device 13 is recovered in this manner, the front ring 15 and the rear ring 1 are then cut by gas cutting or the like.
6 and cut and separated. And B rings 18, 19 and C
Each bolt 22 connecting the ring 20 is loosened, and the C-ring 20 is moved inward and separated as shown in FIG.
As shown in FIG. 5, the carriage A is conveyed backward through the rear ring 16 and placed on the carriage A, and the carriage A is moved backward and collected on the ground. Similarly, the bolts 22 are loosened to separate the B rings 18, 19 and the A ring 17 by moving them inward, and conveyed rearward to be collected on the ground by the cart A.

Since the cutter head 14 is generally severely worn, it is cut to a size that allows the cutter head 14 to pass through the inside of the excavator body 11 without being collected, and is mounted on a carriage A and carried out. Then, the excavator main body 31 remaining in the ground is joined to the existing segment S by welding or concrete casting and used as a tunnel structure.

As described above, the tunnel excavator 1 of the present embodiment is
0, the excavator main body 11 having a cylindrical shape is formed by integrally connecting the front ring 15 and the rear ring 16 by welding, and the front ring 15 can be divided into a substantially sector shape in a circumferential direction. A to C cutter 17 having a plurality of drive motors 12 is removably mounted, and a cutter head 14 is removably mounted on the cutter drive 13 to enable driving rotation. I have.

Therefore, after completion of the tunnel excavation work, first, the cutter head 14 and the cutter driving device 13 are detached from the excavator body 11 and collected on the ground through the existing segment S at the rear, and then the front ring 15 and the rear ring 16 is cut and separated, and the rings 18 to 20 are separated and collected on the ground, so that the rings can be reused, and the cutter head 14, the cutter driving device 13, and the front ring 15 are reused to manufacture an excavator. The cost can be reduced, and an increase in industrial waste due to disposal can be suppressed.

In this case, the cutter head 14 may be replaced with a worn cutter bit, and the cutter driving device 13 performs necessary maintenance after inspection. The front ring 15 may connect the rings 18 to 20 with bolts. The required output of the cutter driving device 13 differs depending on the diameter of the excavation tunnel and the type of excavation ground. However, by making a large number of drive motors 12 detachable, the number of mounted drive motors 12 is selected according to the required output. Good.

FIG. 6 shows a schematic cross section of a tunnel excavator according to a second embodiment of the present invention.

As shown in FIG. 6, in a shield excavator 40 of the present embodiment, a cutter driving device 4 having a plurality of drive motors 42 at the front of a cylindrical excavator body 41 is provided.
The excavator body 41 has front and rear ring portions 45 and 46 integrally connected, and the front ring 45 extends in the circumferential direction. The cutter driving device 43 is unitized and detachable from the front ring 45.

That is, the excavator body 41 has a front ring 45 and a rear ring 46 which are integrally connected by welding and can be separated. The front ring 45 is a substantially fan-shaped A to C ring 47 to be divided into a plurality of pieces along the circumferential direction.
Each of the rings 47 to 50 is in close contact with each other and is fastened by bolts 51, so that a cylindrical mounting flange 52 is formed on the inner peripheral surface along the circumferential direction. When the bolt 51 is loosened, the C ring 50 can be disassembled from the front ring 45 to the inner peripheral side.

On the other hand, the cutter driving device 43 is
A ring gear 55 is rotatably supported in the bearing 3 by a bearing 54, and a drive gear 56 of each drive motor 42 is
5 is engaged. The ring gear 55 extends forward to form a connection flange 57 as an output transmission portion, and the connection flange 58 of the cutter head 44 is
Has been concluded. And this cutter driving device 4
The third casing 53 is fitted on the inner peripheral surface of the mounting flange 52, and is fastened by bolts 61 via a split flange 60 as a connecting member. The split flange 61 has a fan shape in which a ring member having a predetermined width is divided in the circumferential direction, and is fastened with bolts 61 in a state of being fitted to the outer peripheral groove 53 a of the casing 53 and being in close contact with the mounting flange 52.

A plurality of shield jacks 63 are provided along a circumferential direction on a mounting flange 62 formed at a rear portion of the excavator main body 31, and a turning ring 64 is supported so as to be swingable. An erector device 65 for assembling a segment is mounted on the erection device.

Therefore, in order to excavate and form a tunnel, the tunnel excavator 40 is loaded into the starting shaft and the driving motor 4
While rotating the cutter head 44 by 2, the plurality of shield jacks 63 are extended and the excavator body 41 is advanced by a reaction force pressed against a reaction force receiver in the starting shaft,
Excavate the vertical shaft of the starting shaft and start tunnel excavation work. Thereafter, when a tunnel of a predetermined length is constructed by the tunnel excavator 40, the excavation is stopped.

Here, first, the shield jack 62, the elector device 65, the mud feeding pipe, the mud discharging pipe, the agitator, various sensors and the like are removed and collected. Subsequently, by loosening each bolt 59 and removing the cutter head 44 from the cutter driving device 43, and loosening each bolt 61 and removing each split flange 60, the cutter driving device 4 is removed from the excavator body 41.
Remove 3 Then, the cutter driving device 43 is conveyed rearward by a winch or the like, and is moved and collected within the existing segment by a movable cart. Next, the front ring 45 and the rear ring 46 are separated by gas cutting or the like, the bolts 51 are loosened, the C ring 50 is moved inward and separated, and then conveyed backward through the rear ring 46 to be collected. I do. Similarly, the bolts 51 are loosened to move the B-rings 48 and 49 and the A-ring 47 inward to separate them, and to convey and collect them rearward. Further, the cutter head 34 is cut to a predetermined size and carried out. Then, the excavator body 41 remaining in the ground is joined to the existing segment S by welding or concrete casting and used as a tunnel structure.

In the above embodiments, the front rings 15, 45 and the rear rings 16, 46 of the excavator bodies 11, 41 are used.
Are integrally connected by welding and separated by gas cutting or the like, but may be separated by bolting. In addition, the cutter driving device 1
3 and 43 are bolted flanges 27 and 60 and bolt 2
Although it is made detachable by 8, 61, other methods may be used. Also, the cutter heads 14 and 44 are supported in an intermediate manner,
Although the center shaft support method is used, the present invention can be applied to a center support method.

In the above-described embodiment, the tunnel excavator of the present invention has been described as a shield excavator for excavating soft ground. However, the present invention can be applied to a tunnel boring machine for excavating rock. Furthermore, although the tunnel excavator of the present invention has been described as a mud shield excavator, it may be a mud pressure shield excavator. In this case, a screw conveyor may be used instead of the water pipe, the drain pipe, and the agitator.

[0037]

As described in detail in the above embodiment, according to the tunnel excavator according to the first aspect of the present invention, the tunnel excavator is driven by the front part of the cylindrical excavator body which can be divided into a plurality of parts along the circumferential direction. A cutter drive device having a motor and an output transmission unit is detachably mounted, and a cutter head disposed at the front of the excavator body is connected to the output transmission unit of the cutter drive device so that the cutter drive unit can be driven to rotate. After the excavation work is completed, the cutter drive device is removed from the excavator body, and the excavator body can be divided in the circumferential direction and then recovered on the ground, so that it can be reused. Can be suppressed.

According to the tunnel excavator of the second aspect, the excavator body is formed by integrally connecting the front and rear rings, and the front ring can be divided into a plurality of pieces along the circumferential direction, and a part of the front ring can be divided. Can be disassembled on the inner peripheral side, so that the excavator body can be easily separated in the existing tunnel.

According to the third aspect of the present invention, the cutter head is detachably connected to the output transmitting portion of the cutter driving device, so that the cutter head can be separated from the cutter driving device, and each of the cutter heads can be separated. The collection operation can be easily performed by collecting.

According to the third aspect of the present invention, the cutter driving device is fastened to the mounting flange of the excavator main body by bolts or the like via the plurality of connecting members divided in the circumferential direction. By collecting the cutter backward, the cutter driving device can be easily collected even in a place where the reaching shaft cannot be excavated.

According to the method for dismantling a tunnel excavator according to the fifth aspect of the present invention, the tunnel excavator is propelled to excavate the tunnel, and the tunnel excavator is stopped at a predetermined position where a predetermined construction section has been excavated. Then, the front cutter head and cutter driving device were separated from the cylindrical excavator body, and the excavator body was disassembled into a plurality in the circumferential direction and collected on the ground through the existing tunnel at the rear, After the tunnel excavation work is completed, the excavator body is dismantled and collected on the ground, so that it can be reused. By reusing the collected excavator body, the increase in industrial waste due to disposal can be suppressed. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a tunnel excavator according to a first embodiment of the present invention.

FIG. 2 is a front view of the excavator body.

FIG. 3 is a schematic view illustrating a method of dismantling the tunnel excavator according to the embodiment.

FIG. 4 is a schematic view illustrating a method of dismantling the tunnel excavator according to the embodiment.

FIG. 5 is a schematic view illustrating a method of dismantling the tunnel excavator according to the embodiment.

FIG. 6 is a schematic sectional view of a tunnel excavator according to a second embodiment of the present invention.

[Explanation of symbols]

 10,40 Tunnel excavator 11,41 Excavator body 12,42 Drive motor 13,43 Cutter drive 14,44 Cutter head 15,45 Front ring 16,46 Rear ring 17,47 A ring 18,19,48,49 B-ring 20, 50 C-ring 21, 51 Bolt 22, 52 Mounting flange 24, 57 Connection flange (output transmission part) 27, 60 Split flange 30, 63 Shield jack (propulsion jack) 32, 65 Elector device S segment

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshimitsu Kumano 1-1-1 Wadazakicho, Hyogo-ku, Kobe City, Hyogo Prefecture Inside Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Yasushi Toyama Sekigahara, Fuwa-gun, Gifu Prefecture Machi 2067 Komatsu Ltd. Sekigahara Business Room (72) Inventor Mitsuhiro Genda 2067 Sekigahara-cho, Fuwa-gun, Gifu Prefecture Komatsu Ltd. Sekigahara Business Room F-term (reference) 2D054 AD05 EA01

Claims (5)

[Claims] An excavator main body having a cylindrical shape that can be divided into a plurality of parts along a circumferential direction, a cutter driving device detachably mounted on a front portion of the excavator main body and having a drive motor and an output transmission unit; And a cutter head that is disposed at a front portion of the excavator body and is connected to an output transmission unit of the cutter driving device and that can be driven to rotate. 2. The tunnel excavator according to claim 1, wherein the excavator body is formed by integrally connecting front and rear rings, and a front ring can be divided into a plurality of parts along a circumferential direction, and a part of the front ring can be divided. A tunnel excavator characterized in that it can be dismantled on the inner peripheral side. 3. The tunnel excavator according to claim 1, wherein the cutter head is detachably connected to an output transmission unit of the cutter driving device. 4. The tunnel excavator according to claim 1, wherein the cutter driving device is disposed on an inner peripheral side of a mounting flange of the excavator main body, and a bolt or the like is provided through a plurality of circumferentially divided coupling members. A tunnel excavator, which is fastened with a. 5. A tunnel excavator is propelled to excavate a tunnel, the tunnel excavator is stopped at a predetermined position where a predetermined construction section has been excavated, and a front cutter head and a cutter driving device are formed in a cylindrical shape. A method for dismantling a tunnel excavator, comprising separating the excavator body from the excavator body to be formed, dividing the excavator body into a plurality of pieces in a circumferential direction, and collecting the excavator body on the ground through a rear existing tunnel.