Small-radius curve shield segment slab staggering correcting device

Abstract

The invention discloses a small-radius curve shield segment dislocation correcting device which comprises a mounting ring and a limiting stopper, a plurality of transverse columns are fixedly connected to one side of the mounting ring in an annular array mode, a radial oil cylinder is fixed to the end of each transverse column, a connecting clamp is arranged at the end of each radial oil cylinder, and the limiting stopper comprises a positioning pipe. Two half pipes are slidably connected in the positioning pipe, the two half pipes are combined to form a circular pipe and axially slide in the positioning pipe, one end of each half pipe is fixedly connected with a base plate, and the two base plates are symmetrically and obliquely arranged; the outer circle of the half pipe is fixedly connected with a limiting column, and the limiting column and the clamp are arranged correspondingly. After the base plate is inserted between the duct piece and the tunnel wall and the clamp is connected with the two duct piece rings, the staggered duct piece is adjusted to the qualified installation position through traction of the radial oil cylinder, the staggered duct piece of the curved section of the curved tunnel is corrected in time, and therefore the construction quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of shield segment misalignment correction, and in particular to a small-radius curve shield segment misalignment correction device. Background Art

[0002] The excavation of the shield has a unloading effect on the segments and the soil of the tunnel wall. The tunnel wall soil does not have enough support for the segments, and the segments are prone to uneven settlement. In addition to common vertical displacements such as floating and sinking, the segments can also undergo lateral displacements due to various reasons. For the laying of shield segments in small radius curves, the segments are more likely to be misaligned at the bends.

[0003] When the shield machine is laying segment rings, grouting reinforcement is performed between the segment rings and the tunnel wall. The slurry can easily enter the cracks in the rock strata, and the grouting slurry cannot provide enough supporting force to correct the segment line shape. The correction effect is not ideal. After the traditional pulling correction of the segment, new misalignment is likely to occur later due to insufficient grouting support. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a small radius curved shield segment misalignment correction device, thereby solving the problems existing in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for correcting misalignment of shield segments in a small radius curve comprises a mounting ring and a stopper, wherein a plurality of transverse columns are fixedly connected in a circular array on one side of the mounting ring, a radial oil cylinder is fixed at the end of each transverse column, and a connecting fixture is arranged at the end of the radial oil cylinder, and the stopper comprises a positioning tube, two half-tubes are slidably connected in the positioning tube, the two half-tubes are combined to form a circular tube and slide axially in the positioning tube, one end of each half-tube is fixedly connected to a pad, and the two pads are symmetrically inclined;

[0007] The outer circle of the half pipe is fixedly connected to a limiting column, and the limiting column is correspondingly arranged with the clamp.

[0008] Preferably, the fixture includes a base plate, which is rotatably connected to the radial cylinder, a circular arc plate is fixedly connected to one side of the base plate, a "C"-shaped structural plate is arranged at the end of the circular arc plate, a slot is arranged on the structural plate, and the limiting column is arranged corresponding to the slot.

[0009] Preferably, the transverse column is fixedly connected to the arc-shaped back plate, the arc plate fits the inner arc surface of the back plate, the outer circular surface of the arc plate is rotatably connected to the guide column, the back plate is provided with a wavy guide groove, an axial straight guide section is provided at one end of the guide groove, and the guide column is adapted to the guide groove.

[0010] Preferably, the pad is in a fan-shaped structure.

[0011] Preferably, the pad is provided with a slurry outlet hole.

[0012] Preferably, two sides of the positioning tube are respectively fixedly connected to a fastening plate.

[0013] Preferably, one side of the transverse column is fixedly connected to a transverse plate, the transverse plate is fixedly connected to a grouting pipe, the end of the grouting pipe is fixedly connected to a grouting head, the grouting head is coaxial with the positioning pipe, and the grouting head is combined with two half pipes to form a circular pipe corresponding to the arrangement.

[0014] The advantages of the present invention are as follows: a small-radius curved shield segment misalignment correction device provided by the present invention absorbs and rotates the segment through a segment paving machine. After the segment is close to the tunnel wall, it moves along the tunnel wall toward the laid segment ring, and is inserted between the segment and the tunnel wall through a pad. After the clamp is connected to the two segment rings, the misaligned segment is adjusted to a qualified installation position through the traction of a radial cylinder, so that the misalignment of the curved section of the curved tunnel can be corrected in time, thereby ensuring the construction quality.

[0015] The present invention limits the circular arc plate by the guide column and the guide groove, so that the circular arc plate rotates alternately forward and reversely at a certain angle, and the pad plate rotates accordingly. On the one hand, the filling material grouting after the shield is squeezed and compacted, and on the other hand, a fan-shaped cavity larger than the pad plate is formed after the pad plate moves, which is convenient for further grouting in the fan-shaped cavity to form a reinforcement block, thereby further improving the supporting force of the pipe segment and preventing new misalignment from occurring later. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a basic structural schematic diagram of the present invention;

[0017] Figure 2 yes Figure 1 A local enlarged view of point E in FIG.

[0018] Figure 3 It is a schematic diagram of the coaxial state of the limiter and the fixture of the present invention;

[0019] Figure 4 This is a schematic diagram of the present invention for correcting tunnel segments;

[0020] Figure 5 It is a top view of the turning section of the tunnel segment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Example 1

[0023] like Figures 1 to 5 As shown, a small radius curved shield segment misalignment correction device provided by the present invention comprises a mounting ring 1 and a stopper 2. The mounting ring 1 is fixed to the segment paving machine by bolts and rotates together with the segment paving machine. A plurality of transverse columns 11 are fixedly connected to the circular array on one side of the mounting ring 1. A radial cylinder 12 is fixed to the end of each transverse column 11. A connecting fixture 3 is arranged at the end of the radial cylinder 12. The stopper 2 comprises a positioning tube 21. A fastening plate 20 is fixedly connected to both sides of the positioning tube 21. A pre-buried steel plate is buried inside the prefabricated segment of the curved tunnel turning section. The fastening plate 20 is installed in the prefabricated segment. At one end of the inner arc surface of the pipe segment, after the two adjacent pipe segments are corrected in place, the fastening plates 20 on both sides respectively fix the corresponding pipe segments, thereby further strengthening the structural strength. The two half-tubes 22 are slidably connected in the positioning tube 21. The two half-tubes 22 are combined to form a circular tube and slide axially in the positioning tube 21. One end of each half-tube 22 is fixedly connected to a pad 23. The pad 23 has a fan-shaped structure and is provided with a slurry outlet hole 231. The two half-tubes 22 form a circular tube, which is convenient for correcting the misalignment. After the pipe segment moves, a cavity is formed with the inner wall of the tunnel. Slurry is injected into the cavity in time for reinforcement to avoid the subsequent re-formation of the misalignment.

[0024] The two pads 23 are symmetrically arranged. Figure 5 As shown, since the segment ring 10 adapts to the requirements of tunnel turning, the inner gap between two adjacent segment rings 10 is smaller than the outer gap, the welding angles of the prefabricated pad 23 and the half pipe 22 are set correspondingly, and the pads 23 on the inner and outer sides are adapted to different slopes, providing good support for the segment ring 10;

[0025] The outer circle of the half pipe 22 is fixedly connected to the limiting column 24 , and the limiting column 24 is arranged corresponding to the clamp 3 .

[0026] like Figure 1 As shown, the present invention uses the prior art segment laying machine to vacuum absorb the prefabricated segments, and a limiter 2 is pre-fixed in the middle of one side of the prefabricated segment. The pad 23 of the limiter 2 is staggered (the pad 23 close to the segment ring 10 that has been laid is arranged outward, that is, the pad 23 is far away from the center of the mounting ring 1, so that the pad 23 can be easily inserted into the gap between the segment ring 10 that has been laid and the tunnel wall formed by shield cutting, and the gap is filled with grouting after the shield). The segment being laid by the segment laying machine is adjusted as a reference by the posture of the shield machine cutter head. The segment ring 10 that has been laid is prone to dislocation due to insufficient grouting support between it and the shield cutting wall.

[0027] The segment is rotated by absorption by the segment laying machine. After the segment is close to the tunnel wall, it moves along the tunnel wall toward the laid segment ring 10, and is inserted between the segment and the tunnel wall through the pad 23. After the clamp 3 is connected to the two segment rings 10, the radial cylinder 12 is used to pull the misaligned segment to a qualified installation position, so that the misalignment of the curved section of the curved tunnel can be corrected in time, thereby ensuring the construction quality.

[0028] Example 2

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the fixture 3 includes a base plate 31, which is rotatably connected to the radial cylinder 12, and a circular arc plate 32 is fixedly connected to one side of the base plate 31. A "C"-shaped structural plate 33 is arranged at the end of the circular arc plate 32, and a slot 34 is arranged on the structural plate 33. The limiting column 24 is arranged corresponding to the slot 34.

[0030] The transverse column 11 is fixedly connected to the arc-shaped support plate 35, the arc plate 32 fits the inner arc surface of the support plate 35, and the outer circular surface of the arc plate 32 is rotatably connected to the guide column 36. The support plate 35 is provided with a wavy guide groove 37, and an axial straight guide section is provided at one end of the guide groove 37. The guide column 36 is adapted to the guide groove 37.

[0031] During paving, the positioning tube 21 enters the arc plate 32 from the side and is coaxial with the radial cylinder 12. The radial cylinder 12 contracts, and the limiting column 24 enters the slot 34. As the radial cylinder 12 contracts, the originally misplaced pad 23 is pulled to be flush with the resistance of the pipe segment, so that the two adjacent pipe segments are corrected in place. When the pad 23 moves, the limiting column 24 enters the slot 34 (the guide column 36 slides in the sliding section of the guide groove 37 so that the limiting column 24 Entering the slot 34), the arc plate 32 slides axially relative to the support plate 35. Due to the limitation of the guide column 36 and the guide slot 37, the arc plate 32 rotates alternately in a certain angle, which correspondingly causes the pad 23 to rotate. On the one hand, the filling material grouting after the shield is squeezed and compacted. On the other hand, after the pad 23 moves, a fan-shaped cavity larger than the pad 23 is formed, which is convenient for further grouting in the fan-shaped cavity to form a reinforcement block, thereby further improving the supporting force of the pipe segment and preventing new misalignment in the future.

[0032] Example 3

[0033] On the basis of Example 1, one side of the transverse column 11 is fixedly connected to the transverse plate 13, the transverse plate 13 is fixedly connected to the grouting pipe 14, the end of the grouting pipe 14 is fixedly connected to the grouting head 15, the grouting head 15 is coaxial with the positioning pipe 21, and the grouting head 15 is combined with the two half pipes 22 to form a circular pipe corresponding to the setting.

[0034] In Example 3, Figure 2 and Figure 3 As shown, the radial cylinder 12 and the clamp 3 are connected with two half-tubes 22. The two half-tubes 22 are combined to form a circular tube, which is pulled closer to the grouting tube 14 through correction. The grouting tube 14 is inserted into the circular tube to form grouting. The injected slurry penetrates along the circular tube into the cavity formed after the pad 23 moves, thereby forming a reinforcement block between the tunnel and the pipe segment. The reinforcement block is set corresponding to the misalignment of the pipe segment, which is highly targeted, thereby avoiding the subsequent recurrence of quality problems of misalignment.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for correcting misalignment of shield segments in a small radius curve, comprising a mounting ring (1) and a stopper (2), wherein one side of the mounting ring (1) is fixedly connected to a plurality of transverse columns (11) in an annular array, a radial cylinder (12) is fixed to the end of each transverse column (11), and a connecting fixture (3) is provided at the end of the radial cylinder (12), characterized in that: The stopper (2) comprises a positioning tube (21), two half tubes (22) are slidably connected in the positioning tube (21), the two half tubes (22) are combined to form a circular tube and slide axially in the positioning tube (21), one end of each half tube (22) is fixedly connected to a pad (23), and the two pads (23) are symmetrically inclined. The outer circle of the half pipe (22) is fixedly connected to a limiting column (24), and the limiting column (24) is arranged corresponding to the clamp (3).

2. The device for correcting misalignment of shield segments in a small radius curve according to claim 1 is characterized by: The fixture (3) comprises a base plate (31), the base plate (31) is rotatably connected to the radial oil cylinder (12), one side of the base plate (31) is fixedly connected to a circular arc plate (32), a "C"-shaped structural plate (33) is arranged at the end of the circular arc plate (32), the structural plate (33) is provided with a clamping groove (34), and the limiting column (24) is arranged corresponding to the clamping groove (34).

3. The device for correcting misalignment of shield segments in a small radius curve according to claim 2 is characterized in that: The transverse column (11) is fixedly connected to an arc-shaped support plate (35), the arc plate (32) fits the inner arc surface of the support plate (35), the outer circular surface of the arc plate (32) is rotatably connected to a guide column (36), the support plate (35) is provided with an undulating guide groove (37), one end of the guide groove (37) is provided with an axial straight guide section, and the guide column (36) is adapted to the guide groove (37).

4. The device for correcting misalignment of shield segments in a small radius curve according to claim 1 is characterized in that: The pad (23) is in a fan-shaped structure.

5. The device for correcting misalignment of shield segments in a small radius curve according to claim 1 is characterized by: The pad (23) is provided with a pulp outlet hole (231).

6. The device for correcting misalignment of shield segments in a small radius curve according to claim 1 is characterized by: A fastening plate (20) is fixedly connected to each of the two sides of the positioning tube (21).

7. The device for correcting misalignment of shield segments in a small radius curve according to claim 1 is characterized by: One side of the transverse column (11) is fixedly connected to a transverse plate (13), the transverse plate (13) is fixedly connected to a grouting pipe (14), the end of the grouting pipe (14) is fixedly connected to a grouting head (15), the grouting head (15) is coaxial with the positioning pipe (21), and the grouting head (15) and the two half pipes (22) are combined to form a circular pipe corresponding to the arrangement.

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