JPH02296998A - Method and device for building segment in shield construction - Google Patents

Abstract

PURPOSE:To continue the work by providing an assembly device on the side of existing segments and arranging a segment one by one while adapting a propelling jack to the assembled segment so as to advance a shield main unit. CONSTITUTION:A segment supporting device 5 is fixed in a front end part of a segment B, and its true circle holding is performed. Next, a segment A is positioned in the lower of a segment holding device 6 and held through a segment conveying device 34 and a segment supply device 35, and the segment A is mounted to the segment B. Here the residual segment A is used to always propel a shield main unit 2. When assembly of one ring is finished, a segment pressing member 14 is retracted inward, and the supporting device 5 is moved toward by one ring distance by a rear extruding cylinder device. In this way, excavation can be continuously performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a segment assembly method and a segment assembly apparatus in a shield construction method.

BACKGROUND OF THE INVENTION Generally, when a tunnel is dug using the shield construction method, that is, a shield excavator, the inner wall of the tunnel is constructed by sequentially assembling arc cane segments into a ring immediately behind the shield body. By the way, conventionally, when assembling segments, they were assembled by a predetermined width, that is, one ring at a time. Therefore, after the shield body has dug a predetermined width, the digging is stopped and a plurality of segments are assembled into a ring shape using a segment assembly device. Furthermore, this segment assembly device holds the segments and moves them to a predetermined position on the inner surface of the tunnel, and has conventionally been provided on the shield body side.

Problems to be Solved by the Invention According to the conventional shield assembly method described above, since assembly is performed one ring at a time, a propulsion jack cannot be used during assembly, and therefore, there is a problem in that continuous excavation cannot be performed. Ta.

Further, according to the above-mentioned conventional segment assembly device, since the assembly device itself is provided on the shield body side, the shield body, that is, the segment assembly device, moves within the gap between the shield body and the existing ring-shaped segment. Therefore, there are problems in that it becomes difficult to position a new segment to be attached with respect to the existing ring-shaped segment, and it is impossible to attach the segment while the shield body is being excavated. Furthermore, since the shield body is moving forward during excavation of the shield body, there is also a problem that it is difficult to automatically supply the segments to the segment assembly device.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a segment assembly method and a segment assembly apparatus in a shield construction method that can solve the above problems.

Means for Solving the Problems In order to solve the above problems, the segment assembly method of the present invention provides a method for assembling segments of the present invention, in which, when a plurality of segments are arranged in a ring shape along the inner surface of a tunnel, the segment assemblies are arranged on the side of the existing ring-shaped segments. In this method, segments are sequentially arranged one by one using a segment assembly device, and a propulsion jack is brought into contact with the assembled segments other than those currently being arranged to advance the shield body.

Further, the segment assembly device of the present invention is composed of a support device that is fixed and releasable within an existing ring-shaped segment, and a segment holding device that is rotatably provided on the support device along the inner surface of the tunnel. .

Effects According to the segment assembly method and assembly device described above, since the segments are assembled using the segment holding device provided on the existing ring-shaped segment side, the shield main body cannot be moved forward even while the segments are being arranged. Therefore, drilling can be carried out continuously.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 to 5.

In FIG. 1, reference numeral 1 denotes a shield tunneling machine, which is composed of a shield body 2 and a cutter head 3 rotatably disposed at the front of the shield body 2. The assembly device 4 for the segment A constituting the inner wall of the tunnel is disposed in an existing ring-shaped segment B that is already disposed behind the shield body 2 and along the inner wall of the tunnel.

This segment assembly device 4 includes a support device 5 that can be fixed and released within an existing ring-shaped segment B, and a support device 5 that can be freely fixed and released within an existing ring-shaped segment B.
and a segment holding device 6 rotatably provided along the inner surface of the tunnel. As shown in FIGS. 2 and 3, the support device 5 includes a pair of front and rear square-shaped support members 11, a connecting member 12 that integrally connects both support members 11, and a connecting member 12 that connects the support members 11 together. Left, right, top and bottom protrusions 11. The segment a is composed of arc-shaped segment pressing members 14 each supported via a guide holder 13, and a cylinder device 15 for moving the pressing members 14 in and out in the radial direction within the tunnel. Therefore, by protruding all the cylinder devices 15 for egress and withdrawal toward the inner surface of the tunnel within the existing ring-shaped segment B, the segment pressing member 14 is pressed against the ring-shaped segment B, and this support device 5 itself is shaped like a ring. It can be fixed to the segment B side.

Further, the segment holding device 6 is shown in FIGS. 4 and 5.
As shown in the figure, a ring frame 17 is attached to the front surface of the front support member 11 via a rotation bearing 16 so as to be able to freely rotate in a vertical plane, and a rotation device (for example, a rotation a motor 21 having a pinion 20 that meshes with a ring gear 19 formed on the outer periphery of the bearing 18; a pair of guides and a frame 22 protruding forward from left and right positions on the front surface of the ring frame 17; , a slide frame 23 that is movably guided by each of these guide frames 22 in the front-back direction, a first moving cylinder device 24 that is disposed within the guide frame 22 and moves the slide frame 23 back and forth, and each of the above-mentioned a pair of rod-shaped guide bodies 25 that are movably guided on the slide frame 23 in a direction perpendicular to the slide direction and parallel to each other;
A moving frame 26 attached to the tips of both rod-shaped guide bodies 25, a second moving cylinder device 27 provided on each slide frame 23 for moving the moving frame 26 toward and away from the inner surface of the tunnel, and a second moving cylinder device 27 for moving the moving frame 26 toward and away from the tunnel inner surface. The support frame 29 of segment A is attached to the frame 26 via an attitude control device 28.

Therefore, after holding the segment A on the support frame 29, by operating the second moving cylinder device 27, the first moving cylinder device 24, and the motor 21 as appropriate, the segment A can be moved to any position on the inner surface of the tunnel. can be moved to Note that the support frame 29 has bolts and bolts for connecting segment A.
An automatic nut tightening device 30 is provided.

Furthermore, as shown in FIG.
is arranged, and this rear truck 32 is connected to the shield main body 2 via a connection frame 33. This rear truck 32 is for supplying a hydraulic power source, power source, etc. for driving various devices in the 1-shield main body 2. Further, at a lower position of the connection frame 33, a segment conveyance device 34 and a segment supply device 35 for automatically supplying the segments A to the segment holding device 6 are provided.
is located. For example, this segment conveying device 34 includes a guide frame 36 disposed below the connecting frame 33 between the front end position of the support device 5 and the rear position of the connecting frame 33, and a segment conveyor 36 guided by the guide frame 36. )A transport tool 37. The segment supply device 35 also includes a swing arm 4 for guiding the segment A transported by the segment transport device 34 below the segment holding device 6.
0 and a swinging device (not shown) that swings the swinging arm 40. Therefore, from the segment conveying device 38 behind the connecting frame 33 to the hoist 39
The segments A that have been lowered onto the guide frame 36 are sequentially conveyed to the front via the conveyor 37, and then automatically moved below the segment holding device 6 by the swing arm 40.

Note that in order to automatically and reliably transfer the segment A to the segment holding device 6, the front part of the guide frame 36 of the segment conveying device 34 is connected to the connecting member 12 of the supporting device 5.
The segment feeding device 35 is fixed to the supporting member 11 side, and its rear portion is movably suspended from the connecting frame 33 via a guide ring 41. Further, as the support device 5 is excavated, it becomes necessary to move the support device 5 forward, but in that case, as shown by the imaginary line in FIG.
Wheels 4 are attached to the guide rails 42 on the upper surface of the connecting frame 33.
3, and an extrusion cylinder device 4 provided between the connecting member 12 and the connecting frame 33.
4, the entire support device 5 is pushed forward.

Next, a method of assembling one segment will be explained.

First, within the front end of the existing ring-shaped segment B,
The advancing/retracting cylinder device 15 presses each segment pressing member 14 against the inner wall surface of the existing ring-shaped segment B to fix the support device 5.

At this time, the operation of maintaining the existing ring-shaped segment B in perfect circle is also performed. Next, a newly arranged segment A is positioned below the segment holding device 6 via the segment conveying device 34 and the segment feeding device 35. next,
This segment A is held by a segment holding device 6, rotated to a predetermined tunnel inner wall position, and then inserted into a predetermined position and attached to an existing ring-shaped segment B via bolts and nuts. At this time, a propulsion jack (shown in FIG. 1) 7 on the side of the shield main body 2 is brought into contact with segments A other than the attached segment A, so that the shield main body 2 is always moved forward. After this segment A is attached, for example, another segment A at an adjacent position is attached. In this case too,
Of course, only the propulsion jack 7 in this portion is retracted to attach the segment A, and the shield body 2 is advanced by the remaining propulsion jack 7.

Therefore, while one segment) A is being assembled, the remaining segment A is always used to assemble the shield body 2.
continues, and even while segment A is being assembled, excavation can continue. That is,
The segments A can be assembled one by one in a spiral manner.

Note that when one ring is assembled, the support device 5 is moved forward by that amount. That is, as described above, after the segment pressing member 14 is retracted inward and the entire supporting device 5 is temporarily supported by the connecting frame 33, the rod of the extrusion cylinder device 44 provided on the connecting frame 33 side is The tip end is connected to the connecting member 12 and the supporting member 5 is moved forward. The forward movement of the shield body 2 is interrupted only during this work.

In this way, while assembling segment A, the remaining segments A can be used to move the shield body 2 forward. There are no long interruptions in advance or excavation operations.

Effects of the Invention As described above, according to the segment assembling method of the present invention, the segment assembling device disposed on the side of the existing ring-shaped segment sequentially arranges the segments one by one, and also eliminates the need to assemble segments outside of the amount during the arrangement. Since the shield body is advanced by bringing the propulsion jack into contact with the segment, there is no need to interrupt excavation even when the segment is placed on the inner wall surface of the tunnel.

Further, according to the segment assembly device of the present invention, since the support device provided with the segment holding device is supported inside the existing ring-shaped segment, when arranging a new segment, the support device provided with the segment holding device is supported inside the existing ring-shaped segment. can be used as a reference, which improves the assembly accuracy, and also allows segment assembly and bolt/nut tightening work even during excavation.Furthermore, the segment transport and feeding equipment , since it is placed on the side of the existing ring-shaped segment, it is possible to easily automate the transportation and supply of the segments.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall sectional view, FIG. 2 is a sectional view of the support device, and FIG. 3 is a cross-sectional view of the support device.
-I sectional view, FIG. 4 is a sectional view of the segment holding device, and FIG. 5 is a partially cutaway front view of the same device. A... segment, B ring-shaped segment, 1...
...Shield excavator, 2...Shield body, 4...
... Segment assembly device, 5... Support device, 6...
...Segment holding device.

Claims (1)

[Claims] 1. When arranging a plurality of segments in a ring shape along the inner surface of a tunnel, a segment assembly device placed on the side of the existing ring-shaped segment sequentially arranges the segments one by one. At the same time, a segment assembly method in the shield construction method is characterized in that the shield body is advanced by bringing a propulsion jack into contact with the assembled segments other than those currently being installed. 2. A segment assembly device for shield construction method, comprising a support device that can be fixed and released within an existing ring-shaped segment, and a segment holding device that is rotatably provided on the support device along the inner surface of the tunnel. .