Subway tunnel segment correcting device

Abstract

The invention discloses a metro tunnel segment correcting device, and belongs to the technical field of segment correcting devices, the metro tunnel segment correcting device comprises a base pipe, one end of the base pipe is rotatably connected with a cross rod, a grouting channel is formed in the base pipe and the cross rod, a notch is formed in one side of the cross rod, a folding rod slides in the cross rod, and the folding rod can extend out of the notch. The purpose of facilitating grouting is achieved by stretching the transverse rod into the back side of the segment, on the other hand, the transverse rod can serve as a framework or an anchoring structure to anchor the segment, and the corrected segment is high in structural stability.

Description

Technical Field

[0001] The present invention relates to the technical field of segment correction devices, and particularly to a segment correction device for subway tunnels. Background Art

[0002] After the shield segments are grouted for the first time, due to various reasons, phenomena such as segment floating and sinking, i.e., the segment alignment deviates from the designed position, occur. For the alignment correction work of the shield segments after the misalignment, generally, the method of secondary grouting is adopted to make up for the defects of the segments. Since the grouting pipe is not easy to penetrate into the back side of the segment, on the one hand, it is difficult for the grout to spread over a large area on the back side of the segment, and on the other hand, the supporting stability of the separately injected grout is insufficient. Summary of the Invention

[0003] The purpose of the present invention is to solve the defects existing in the prior art, and a segment correction device for subway tunnels is proposed, so as to solve the problems existing in the prior art.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A segment correction device for subway tunnels includes a base pipe. One end of the base pipe is rotatably connected to a cross bar. A grouting channel is formed in the base pipe and the cross bar. A notch is provided on one side of the cross bar. A folding rod slides in the cross bar. The folding rod can extend out from the notch. When the folding rod extends out from the notch, it forms a folded angle to form a support on the back side of the segment.

[0006] Preferably, the folding rod is provided with cutting teeth and slurry outlet holes.

[0007] Preferably, a cylinder slides and rotates in the base pipe. A spiral groove is provided on the inner wall of the base pipe. A ball is provided on the side surface of the cylinder. The ball slides and is connected in the spiral groove;

[0008] One end of the cross bar is fixedly connected to a circular column. The circular column is rotatably connected to the base pipe. A square hole is provided at one end of the circular column. The cylinder is fixedly connected to a square rod. The square rod slides and is connected in the square hole. A compression cavity is formed between the cylinder and the circular column. The compression cavity is filled with uncured glue.

[0009] Preferably, a communication groove is provided on the inner wall of the base pipe corresponding to the cylinder.

[0010] Preferably, the folding rod includes a first slider, a second slider and two support rods. A support spring is fixedly connected between the first slider and the end wall of the sliding groove at one end of the cross bar. A limiting sliding groove is provided at the other end of the cross bar. The second slider slides and is connected in the limiting sliding groove and is pushed to slide by a pushing member. The first slider and the second slider are respectively hinged to a support rod. The two support rods are hinged to each other and a torsion spring is provided. The hinge shaft of the support rod and the second slider can slide out from the limiting sliding groove;

[0011] The included angle between the two support rods varies between 175° and 150°.

[0012] Preferably, the pushing member includes an arc-shaped plate, and a plurality of arc-shaped bumps and ejecting bumps are fixedly connected to the inner wall of the arc-shaped plate at intervals. The protruding height of the ejecting bump is greater than that of the arc-shaped bump. One side of the second slider is fixedly connected with a ejecting rod, and the ejecting rod is arranged corresponding to the arc-shaped bump and the ejecting bump.

[0013] Preferably, a cushion block is sleeved on the base pipe, adjusting sliding grooves are respectively arranged on both sides of the cushion block, and an arc-shaped cushion plate is slidably connected in the adjusting sliding grooves.

[0014] The advantages of the present invention are as follows: The subway tunnel segment correction device provided by the present invention extends the cross bar into the back side of the segment to facilitate grouting. On the other hand, the cross bar can form an anchor for the segment as a skeleton or an anchoring structure, and the structural stability of the corrected segment is strong.

[0015] In the present invention, the folding rod reciprocates in the cross bar as a whole under the action of the ejecting rod cooperating with the arc-shaped bump. The cutting teeth facilitate cutting the soil body and reduce the resistance of the cross bar to rotate; when the cross bar rotates to the required position, that is, the ejecting rod abuts against the ejecting bump, the height of the ejecting bump enables the hinge shaft of the support rod and the second slider to slide out of the limit sliding groove, so that the support rod can rotate relative to the second slider. Under the action of the torsion spring, the two support rods rotate into a supporting shape. If there is a supporting space between the segment and the tunnel, the cross bar and the support rod form a skeleton in the slurry, and the corresponding single grouting reinforcement structure is stronger. Brief Description of the Drawings

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

[0017] Figure 2 is the sectional connection structural schematic diagram of the base pipe;

[0018] Figure 3 is Figure 2 the partial enlarged view at E in

[0019] Figure 4 is the sectional view of the connection structure of the base pipe and the cross bar of the present invention;

[0020] Figure 5 is the schematic diagram of the two support rods of the present invention forming a supporting shape;

[0021] Figure 6 is the state diagram of the present invention when placed along the gap between two segments;

[0022] Figure 7 is the state schematic diagram of the cross bar of the present invention rotating to the back side of one of the segments. Detailed Description of the Embodiment

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to 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 used to limit the present invention.

[0024] Embodiment 1

[0025] As shown in Figures 1 to 7 the figure, a subway tunnel segment correction device provided by the present invention includes a base pipe 1. A cushion block 11 is sleeved on the base pipe 1. The cushion block 11 is provided with a through hole, and the base pipe 1 is slidably connected through the through hole. According to the requirements of segment correction, the position of the segment and the cushion block 11 is adjusted, and then an integral reinforcement is formed by welding or bolt locking. Adjusting chutes 12 are respectively arranged on both sides of the cushion block 11, and an arc-shaped cushion plate 13 is slidably connected in the adjusting chutes 12. When the tunnel inner wall is soft soil and bulges outwards, causing the segment to bulge and have a dislocation, the arc-shaped cushion plate 13 on the bulging side is pushed by a hydraulic jack in the prior art to push back and correct the bulging and dislocated segment. After correction, the arc-shaped cushion plate 13 on this side is welded and fixed to the cushion block 11. Grouting inside the base pipe 1 cooperates with the arc-shaped cushion plate 13 to form an anchoring structure. One end of the base pipe 1 is rotatably connected to a cross bar 2. After the cross bar 2 rotates to the back side of the segment, the segment sunken into the tunnel wall can also be corrected outwards by pulling the base pipe 1 outwards. A grouting channel 3 is formed inside the base pipe 1 and the cross bar 2. A notch 21 is arranged on one side of the cross bar 2, and a folding rod 4 slides inside the cross bar 2. The folding rod 4 can extend out from the notch 21. When the folding rod 4 extends out from the notch 21, it forms a fold angle shape to support on the back side of the segment. The folding rod 4 is provided with cutting teeth and slurry outlet holes. The cutting teeth extend out from the notch 21 to cut the soft soil on the back side of the segment in cooperation with the rotation of the cross bar 2, reducing the resistance of the rotation inside the cross bar 2.

[0026] One or more of the present invention are set according to the convex condition of the segment. First, a strip-shaped groove extending to the back side of the segment is cleaned out at the joint of two segments by a slitting device in the prior art. After the cross bar 2 is adapted to the strip-shaped groove, it is inserted into the bottom of the strip-shaped groove. Then, the relative rotation angle of the cross bar 2 with respect to the base pipe 1 is between 10° and 170° (such as Figure 6 when the cross bar 2 rotates 90° to form Figure 7 the state). On the one hand, the cross bar 2 extends into the back side of the segment to facilitate grouting. On the other hand, the cross bar 2 can be used as a framework or an anchoring structure to anchor the segment, and the structural stability of the corrected segment is strong.

[0027] Embodiment 2

[0028] As shown in Figures 1 to 7As shown, a cylinder 5 is slidably and rotatably arranged in the base tube 1, that is, the cylinder 5 can slide and rotate along the axial direction of the base tube 1, a spiral groove is arranged on the inner wall of the base tube 1, and the rotation angle of the spiral groove is between 80° and 90°. A ball 51 is arranged on the side of the cylinder 5, and the ball 51 is slidably connected in the spiral groove. When the cylinder 5 is subjected to an axial thrust, the cylinder 5 rotates due to the rotation of the spiral groove.

[0029] One end of the cross bar 2 is fixedly connected to the circular column 22, and the circular column 22 is rotatably connected to the base pipe 1. A square hole is arranged at one end of the circular column 22. The cylinder 5 is fixedly connected to the square rod 52, and the square rod 52 is slidably connected to the square hole. The cylinder 5 can move toward the circular column 22 and rotate with the circular column 22. A compression chamber 53 is formed between the cylinder 5 and the circular column 22. The compression chamber 53 is filled with a glue to be cured. The compression chamber 53 is injected before the pipe segment is corrected. The glue to be cured is cement slurry, water glass and other existing grouting reinforcement liquids (adjusted according to the soft soil, voids, water seepage and other conditions on the back side of the pipe segment). The glue to be cured has good fluidity before solidification, and has a curing and filling effect after being injected into the back side of the pipe segment or filling the gap between two pipe segments. A connecting groove 54 is arranged on the inner wall of the base pipe 1. The connecting groove 54 is arranged corresponding to the cylinder 5, and the connecting groove 54 is staggered with the spiral groove.

[0030] In Example 2, the outer end of the base pipe 1 is threadedly connected to the grouting pipe, and high-pressure slurry is injected. The high-pressure slurry pushes the cylinder 5 to move along the axial direction of the base pipe 1. Due to the limitation of the ball 51 and the spiral groove, the cylinder 5 rotates with the circular column 22, thereby driving the cross bar 2 to rotate to the back side of the segment; when the cylinder 5 moves axially along the base pipe 1, the compression chamber 53 is filled with the glue to be cured and sprayed from the grouting channel 3 to the notch 21. The glue to be cured can first soften the soft soil on the back side of the segment, so that the resistance to the rotation of the cross bar 2 is reduced;

[0031] As the cylinder 5 moves further axially along the base pipe 1, the outer end of the cylinder 5 moves toward the cross bar 2 and exposes one end of the connecting groove 54. The externally injected slurry is pressed through the connecting groove 54-grouting channel 3 into the cavity between the pipe segment and the inner wall of the tunnel separated by the cross bar 2, thereby facilitating a large amount of slurry to penetrate into the back side of the pipe segment to improve the reinforcement effect.

[0032] Example 3

[0033] like Figures 1 to 7As shown in the figure, the folding rod 4 includes a first slider 41, a second slider 42 and two support rods 43. A support spring 44 is fixedly connected between the first slider 41 and the end wall of the sliding groove at one end of the cross bar 2. A limiting sliding groove 45 is arranged at the other end of the cross bar 2. The second slider 42 is slidably connected in the limiting sliding groove 45 and is pushed and slid by a pushing member. The first slider 41 and the second slider 42 are respectively hinged to a support rod 43. The two support rods 43 are hinged to each other and a torsion spring is arranged. The hinge shaft of the support rod 43 and the second slider 42 can slide out of the limiting sliding groove 45. The included angle between the two support rods 43 varies between 175° and 150°. That is, after the hinge shaft of the support rod 43 and the second slider 42 leaves the limiting sliding groove 45, the torsion spring makes the included angle between the two support rods 43 rotate from 175° to 150°. The first slider 41 and the second slider 42 are provided with anti-retreat structures in the prior art, such as ratchet teeth and elastic cards, limiting holes and spring plugs. When the first slider 41 and the second slider 42 are close to each other and the two support rods 43 form a support framework state, they are locked (when there are cavities between the segment and the tunnel inner wall, a framework support is formed in the grouting liquid to further improve the structural strength).

[0034] The pushing member includes an arc-shaped plate 5. A plurality of arc-shaped protrusions 51 and ejecting protrusions 52 are fixedly connected at intervals on the inner wall of the arc-shaped plate 5. The protruding height of the ejecting protrusion 52 is greater than that of the arc-shaped protrusion 51. A ejecting rod 53 is fixedly connected to one side of the second slider 42. The ejecting rod 53 corresponds to the arc-shaped protrusions 51 and the ejecting protrusions 52 (the positions of the arc-shaped protrusions 51 and the ejecting protrusions 52 are designed according to requirements). A reference line is set on the base pipe 1 relative to the segment. The external grouting pipe is grouted or sucked through a reciprocating pump. When the reference line does not rotate to a predetermined angle relative to the segment, by sucking back the slurry, the cylinder 5 and the circular column 22 drive the cross bar 2 to rotate back (before the communication groove 54 plays a communication role). The ejecting rod 53 at one end of the folding rod 4 repeatedly acts on the adjacent arc-shaped protrusions 51, so that the folding rod 4 can reciprocate like a saw, and it is easier to rotate and cut into the back side of the segment with the cooperation of the cutting teeth.

[0035] In Embodiment 3, the cross bar 2 rotates under the grouting pressure in Embodiment 2. When the cross bar 2 rotates, the ejecting rod 53 cooperates with the arc-shaped protrusion 51 to make the folding rod 4 reciprocate as a whole in the cross bar 2, which is convenient for the cutting teeth to cut the soil and reduces the resistance of the cross bar 2 to rotate. When the cross bar 2 rotates to the required position, that is, the ejecting rod 53 abuts against the ejecting protrusion 52. The height of the ejecting protrusion 52 makes the hinge shaft of the support rod 43 and the second slider 42 slide out of the limiting sliding groove 45, so that the support rod 43 can rotate relative to the second slider 42 (the support rod 43 is limited and cannot rotate in the limiting sliding groove 45). Under the action of the torsion spring, the two support rods 43 rotate into a supporting shape. If there is a supporting space between the segment and the tunnel, the cross bar 2 and the support rods 43 form a framework in the slurry, and the corresponding single grouting reinforcement structure is stronger.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A subway tunnel segment correction device, comprising a base pipe (1), one end of the base pipe (1) is rotatably connected to a cross bar (2), a grouting channel (3) is formed in the base pipe (1) and the cross bar (2), and is characterized in that: A notch (21) is provided on one side of the cross bar (2), and a folding rod (4) is slidable inside the cross bar (2). The folding rod (4) can extend out of the notch (21). When the folding rod (4) extends out of the notch (21), it forms an angled shape to provide support on the back side of the pipe segment.

2. A subway tunnel segment correction device according to claim 1, characterized in that: The folding rod (4) is provided with cutting teeth and pulp outlet holes.

3. The subway tunnel segment correction device according to claim 1, characterized in that: A cylinder (5) is slidably and rotatably arranged in the base tube (1), a spiral groove is arranged on the inner wall of the base tube (1), a ball (51) is arranged on the side of the cylinder (5), and the ball (51) is slidably connected in the spiral groove; One end of the cross bar (2) is fixedly connected to a circular column (22), the circular column (22) is rotatably connected to the base tube (1), one end of the circular column (22) is provided with a square hole, the circular column (5) is fixedly connected to a square rod (52), the square rod (52) is slidably connected to the square hole, a compression chamber (53) is formed between the circular column (5) and the circular column (22), and the compression chamber (53) is filled with glue to be cured.

4. The subway tunnel segment correction device according to claim 3 is characterized in that: A communication groove (54) is provided on the inner wall of the base pipe (1), and the communication groove (54) is provided corresponding to the cylinder (5).

5. The subway tunnel segment correction device according to claim 1, characterized in that: The folding rod (4) comprises a first slider (41), a second slider (42) and two support rods (43); a support spring (44) is fixedly connected between the first slider (41) and the end wall of the sliding groove at one end of the cross bar (2); a limiting sliding groove (45) is arranged at the other end of the cross bar (2); the second slider (42) is slidably connected in the limiting sliding groove (45) and is pushed and slid by a pushing member; the first slider (41) and the second slider (42) are respectively hingedly connected to a support rod (43); the two support rods (43) are hingedly connected to each other and are provided with a torsion spring; and a hinge axis between the support rod (43) and the second slider (42) can slide out of the limiting sliding groove (45); The included angle between the two supporting rods (43) varies between 175° and 150°.

6. The subway tunnel segment correction device according to claim 5, characterized in that: The pusher comprises an arc-shaped plate (5), the inner wall of the arc-shaped plate (5) is fixedly connected with a plurality of arc-shaped protrusions (51) and ejection protrusions (52) at intervals, the protrusion height of the ejection protrusions (52) is greater than that of the arc-shaped protrusions (51), and one side of the second sliding block (42) is fixedly connected with an ejector rod (53), and the ejector rod (53) is arranged corresponding to the arc-shaped protrusions (51) and the ejection protrusions (52).

7. The subway tunnel segment correction device according to claim 1, characterized in that: The base pipe (1) is sleeved with a cushion block (11), and adjustment slide grooves (12) are respectively arranged on both sides of the cushion block (11), and an arc-shaped cushion plate (13) is slidably connected in the adjustment slide groove (12).

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