JP2007051467A - Centering device for shape retaining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a centering device for a vertically expandable shape retaining device, which can secure shapes of assembled segments with high accuracy even in the construction of a curved portion. <P>SOLUTION: In the implementation of the centering device, the shape retaining device 1 for securing the shapes of the segments 3 after the completion of the assembling of the same is arranged along a rear deck 5 extending from the rear of a shield frame 4 in an axially movable and laterally movable manner, and then center position adjusting means 6 for laterally moving the shape retaining device 1 are arranged in the rear deck 5 such that the center of the shape retaining device 1 matches with centers of the segments 3 in a shape retained state during the construction of the curved portion. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shape holding device for securing the shape of a segment after completion of segment assembly, and more particularly to a centering device for a shape holding device that can ensure the shape of a segment assembled during curve construction with high accuracy.

  Generally, a tunnel excavated with a shield machine is assembled along its inner circumference, and the segment is fixed by injecting the backing material on the back side of the segment, but until the backing material solidifies, The shape must be retained.

  Therefore, the shield machine is provided with a shape holding device that presses and holds the inner peripheral surface of the segment assembled along the inner periphery of the tunnel on the rear deck extended behind the shield frame.

  The shape holding device is formed so as to be able to expand and contract up and down, and presses and holds the upper and lower inner peripheral surfaces of the segments assembled on the inner peripheral surface of the tunnel.

Japanese Patent Laid-Open No. 11-210397 No. 7-47516

  By the way, as shown in FIG. 5, since the shape holding device 30 is provided on the rear deck 31 extending rearward from the inside of the shield frame 4, the segment assembled on the inner peripheral surface of the mine shaft 32 when used at the time of curve construction. There is a problem in that it is difficult to ensure the shape of the assembled segment with high accuracy because there is a difference between the center (not shown) and the center of the shape holding device 30. In particular, when the tunnel 32 has a non-circular cross section such as a horseshoe shape, there is a problem that the tunnel wall formed by the segment is deformed even if the above-described deviation is slight.

  Accordingly, an object of the present invention is to provide a centering device for a shape holding device that can solve the above-described problems and can accurately ensure the shape of the assembled segment even during curve construction.

  In order to solve the above problems, the present invention provides a shape holding device for securing the shape of the segment after completion of the segment assembly so as to be axially movable along the rear deck extending from the rear of the shield frame. The center position adjusting means for moving the shape holding device in the width direction is provided on the rear deck so that the center of the shape holding device and the center of the segment holding the shape coincide with each other at the rear deck. It is a thing.

  The shape holding device may include an upper and lower frame that extends in the vertical direction and an expansion jack that is provided between the upper and lower frames and expands and contracts the upper and lower frames.

  The rear deck behind the upper and lower frames is provided with a moving jack, the upper and lower frames are connected to the moving jack, and the upper and lower frames are moved to the position of the segment that holds the shape after the segment assembly is completed. The upper and lower frames may be adjusted in position by the center position adjusting means.

  The rear deck is provided with a rail for mounting the shape holding device in an axially movable and horizontal posture, and the upper frame is provided with a roller that runs on the rail in the axial direction. The roller width may be formed wider than the rail so that the roller slides in the width direction with respect to the rail.

  According to the present invention, it is possible to ensure the shape of the assembled segment with high accuracy even during curve construction.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the centering device 2 of the shape holding device 1 extends the shape holding device 1 for securing the shape of the segment 3 after the segment assembly is completed from the rear of the shield frame 4. Provided along the rear deck 5 so as to be movable in the axial direction, and provided so as to be movable in the width direction. The rear deck 5 is shaped so that the center of the shape holding device and the center of the segment holding the shape coincide with each other during curve construction. A center position adjusting means 6 for moving the holding device 1 in the width direction is provided.

  As shown in FIGS. 2 and 3, the rear deck 5 is provided integrally with the shield frame 4 and extends rearward along the axis 7 of the shield frame 4. Further, rails 8 are provided on both sides of the upper surface of the rear deck 5 for mounting the shape holding device 1 in an axially movable and horizontal posture.

  A plurality of shape holding devices 1 are provided on the rear deck 5 so as to be separated from each other in the front-rear direction. The upper and lower frames 9 and 10 expand in the vertical direction, and the upper and lower frames 9 and 10 are expanded and contracted. And an expansion jack 11 to be configured. As shown in FIGS. 1 and 2, the upper frame 9 is formed extending in the width direction, and an upper abutting portion 14 that abuts on the upper inner peripheral surface 13 of the tunnel wall 12 formed by a plurality of segments 3. And upper column portions 15 and 15 which are formed to hang from both ends of the upper contact portion 14 and are slidably engaged with the lower frame 10 and extend inward in the width direction to the upper column portions 15 and 15. An inner beam portion 17 placed on the rail 8 via a roller 16 is provided. The upper contact portion 14 is formed to be curved along the upper inner peripheral surface 13 of the tunnel wall 12 so as to receive the segment 3 in a wide range. The roller 16 is for running on the rail 8 in the axial direction, and has a roller width wider than the rail 8 so as to slide in the width direction with respect to the rail 8. Thereby, the shape holding device 1 can move in the width direction with respect to the rear deck 5.

  The lower frame 10 extends downward from both ends of the lower contact portion 18 that is in contact with the lower inner peripheral surface of the tunnel wall 12 and can be slid up and down to the upper column portions 15 and 15 of the upper frame 9. And lower column parts 19 and 19 engaged with each other. The lower contact portion 18 is formed to be curved along the lower inner peripheral surface 20 of the tunnel wall 12 and supports the segment 3 in a wide range.

  As shown in FIGS. 2 and 3, the rear deck 5 behind the upper and lower frames 9 and 10 is provided with a moving jack 21 for moving the upper and lower frames 9 and 10 in the axial direction. Specifically, the moving jacks 21 are provided on both sides of the rear deck 5 in the width direction, respectively, one end of which is connected to the rear deck 5 and the other end is connected to the upper frame 9 with the outer beam members 22 and 23. It is connected through. When the segment 3 is assembled over the entire circumference in the shield frame 4 and the rear deck 5 is propelled by the segment 1 ring, the moving jack 21 is maintained in order to maintain the shape of the assembled segment 3. The upper and lower frames 9 and 10 are configured to move to the position of the segment 3. The outer beam members 22 and 23 are provided on both sides of the upper frame 9 so as to extend outward in the width direction, and are respectively connected to the other end of the moving jack 21.

  As shown in FIG. 1, the center position adjusting means 6 is a receiving jack that receives the leading end of the aligning jack 24 provided on the rear deck 5 and the aligning jack 24 provided on the shape holding device 1. Part 25. The alignment jacks 24 are provided on both sides of the rear deck 5 so as to face the predetermined positions where the upper and lower frames 9 and 10 are expanded, and the upper and lower frames 9 and 10 are moved to the position of the segment 3 to be held. At that time, the upper and lower frames 9 and 10 are adjusted in position. The position where the upper and lower frames 9 and 10 expand is the position where the upper and lower frames 9 and 10 are moved by the moving jack 21 and is the position of the segment 3 where the shape after assembly is to be maintained. The receiving portion 25 includes a receiving frame 26 that extends downward from the inner beam portion 17 and a receiving plate 27 that is provided on the receiving frame 26 and is pressed by the aligning jack 24. The receiving plate 27 is curved so as to go outward in the width direction as it goes downward, and is smoothly detached from the alignment jack 24 when the upper frame 9 rises from above the rail 8.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 3, when the segment 3 is assembled over the entire circumference in the shield frame 4 and the rear deck 5 is propelled by the segment 1 ring, the movement jacks 21 are respectively extended, and the shape holding device 1 is moved to the second position. Advancing from a position indicated by a chain line to a predetermined position indicated by a solid line. At this time, the upper and lower frames 9, 10 of the shape holding device 1 are reduced in the vertical direction in advance and placed on the rail 8, and run on the rail 8 while being separated from the segment 3. When the moving jack 21 is fully extended, the shape holding device 1 reaches the position of the segment 3 to be held.

  As shown in FIG. 1, when the curve construction is performed, centering of the shape holding device 1 is performed using the center position adjusting means 6. Specifically, the amount of deviation between the center of the shape holding device 1 and the center of the segment 3 holding the shape from the curvature of the curve under construction and the distance from the shape holding device 1 to the proximal end of the rear deck 5. As shown in FIGS. 1 and 2, the alignment jack 24 positioned inside the curve is extended to push the receiving portion 25 in the width direction (in the direction of the arrow), and the shape holding device 1 is curved. Is moved by the calculated displacement amount w. At this time, the upper and lower frames 9, 10 are placed on the rail 8 via the rollers 16, but the rollers 16 are formed wider than the rails 8, so that the width of the upper side of the rails 8 is increased. By sliding, the posture of the upper and lower frames 9 and 10 is kept horizontal. As a result, the center of the shape holding device 1 is moved in the direction of the arrow by a shift amount w, and the center of the shape holding device 1 and the center of the segment 3 that holds the shape are aligned in the width direction and aligned.

  Thereafter, the expansion jack 11 is extended to expand the upper and lower frames 9 and 10. Specifically, when the expansion jack 11 is extended, the lower frame 10 is lowered and brought into contact with the lower inner peripheral surface 20 of the tunnel wall 12 with the upper frame 9 placed on the rail 8. . At this time, since the shape holding device 1 is aligned with the center of the segment 3 that holds the shape, the shape holding device 1 is uniformly abutted against the inner peripheral surface of the segment 3. When the lower frame 10 is brought into contact with the segment 3 in this way, the lower frame 10 stops descending and the upper frame 9 begins to rise. When the upper frame 9 starts to rise, the roller 16 floats from the rail 8. However, since the upper frame 9 is supported by being connected to the movement jacks 21 on both sides, it does not fall down and rises stably. Is done. As shown in FIG. 4, similarly to the lower frame 10, the upper frame 9 is evenly abutted against the inner peripheral surface of the segment 3, and the segment 3 is accurately held in a predetermined shape.

  Thereafter, when the segment 3 is assembled over the entire circumference in the shield frame 4, the shield frame 4 shown in FIGS. 2 and 3 is advanced together with the rear deck 5. At this time, the moving jack 21 is released from the hydraulic pressure so as to freely expand and contract, and retracts as the rear deck 5 advances. As a result, the upper and lower frames 9 and 10 stop at a predetermined position regardless of the forward movement of the rear deck 5 and can stably hold the segment 3. When the rear deck 5 is propelled by one segment ring and stopped, the expansion jack 11 is retracted to separate the upper and lower frames 9 and 10 from the segment 3 and placed on the rail 8, and then the same as described above. The shape holding device 1 is advanced to a predetermined position by extending the moving jack 21, and thereafter, the same procedure as described above is repeated to sequentially hold the front segments 3 by the shape holding device 1.

  As described above, the shape holding device 1 for securing the shape of the segment 3 after completion of the segment assembly is provided so as to be axially movable along the rear deck 5 extending from the rear of the shield frame 4, and in the width direction. Center position adjusting means 6 for moving the shape holding device 1 in the width direction so that the center of the shape holding device 1 and the center of the segment 3 holding the shape coincide with the rear deck 5 at the time of curve construction. Since the centering device 2 of the shape holding device 1 is provided, the shape of the assembled segment 3 can be easily and accurately secured even during curve construction.

  Since the shape holding device 1 includes the upper and lower frames 9 and 10 that extend in the vertical direction and the expansion jack 11 that is provided between the upper and lower frames 9 and 10 and expands and contracts the upper and lower frames 9 and 10, It can be moved easily.

  The rear deck 5 behind the upper and lower frames 9 and 10 is provided with a moving jack 21, and the upper and lower frames 9 and 10 are connected to the moving jack 21, and the position of the segment 3 holding the shape after the segment assembly is completed. Since the upper and lower frames 9 and 10 are moved to the position and the positions of the upper and lower frames 9 and 10 are adjusted by the center position adjusting means 6 at that position, the positions of the upper and lower frames 9 and 10 can be accurately adjusted.

  The rear deck 5 is provided with a rail 8 for placing the shape holding device 1 in an axially movable and horizontal posture, and the upper frame 9 is provided with a roller 16 that runs on the rail 8 in the axial direction. In addition, since the roller 16 is formed wider than the rail 8 so that the roller 16 slides in the width direction with respect to the rail 8, the shape holding device 1 can be easily moved in the width direction with a simple structure. it can.

  The moving jack 21 has one end connected to the rear deck 5 and the other end connected to the upper frame 9, but the other end may be connected to the lower frame 10.

It is front sectional drawing of the centering apparatus of the shape holding | maintenance apparatus which shows suitable embodiment of this invention. It is a top view of FIG. FIG. 3 is a side view of FIG. 2. It is front sectional drawing of the centering apparatus which press-holds a segment. It is a plane schematic explanatory drawing of the conventional shape holding | maintenance apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shape holding device 2 Centering device 3 Segment 4 Shield frame 5 Back deck 6 Center position adjustment means 8 Rail 9 Upper frame 10 Lower frame 11 Expansion jack 16 Roller 21 Movement jack

Claims (4)

  A shape holding device for securing the shape of the segment after completion of the segment assembly is provided so as to be movable in the axial direction along the rear deck extending from the rear of the shield frame and to be movable in the width direction. And a center position adjusting means for moving the shape holding device in the width direction so that the center of the shape holding device and the center of the segment holding the shape coincide with each other at the time of curve construction. apparatus.   2. The centering device for a shape holding device according to claim 1, wherein the shape holding device includes an upper and lower frame extending in the vertical direction, and an expansion jack provided between the upper and lower frames to expand and contract the upper and lower frame.   The rear deck behind the upper and lower frames is provided with a moving jack, the upper and lower frames are connected to the moving jack, and the upper and lower frames are moved to the position of the segment that holds the shape after the segment assembly is completed. 3. The centering device for a shape holding device according to claim 2, wherein the upper and lower frames are adjusted in position by the center position adjusting means. The rear deck is provided with a rail for mounting the shape holding device in an axially movable and horizontal posture, and the upper frame is provided with a roller that runs on the rail in the axial direction. 4. The centering device for a shape holding device according to claim 2, wherein the roller is formed wider than the rail so that the roller slides in the width direction relative to the rail.

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