Automatic segment dismantling device for construction of large-diameter shield tunnel connecting passage

Abstract

The application discloses a segment automatic dismantling device for super-large-diameter shield tunnel connecting passage construction, which comprises a cross beam, a butt joint sleeve fixedly connected to one side of the cross beam, right-angle clamping plates fixedly connected to two ends of the cross beam, and a rotary digging and hole expanding device arranged on the cross beam; the rotary digging and hole expanding device comprises a ring-shaped guide rail, a sliding seat slidably connected to the guide rail, a side plate fixedly connected to the sliding seat, a first motor fixedly connected to the side plate, a swing rod mounted on a main shaft of the first motor, and a scraper arranged on an end of the swing rod away from the first motor. The segment automatic dismantling device is characterized in that the scraper is rotated by a sliding rod pushing gear, so that the influence of the swing rod angle change on the soil cutting angle is adapted, and the cutting angle of the scraper is always kept appropriate.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and in particular to an automated segment removal device for the construction of connecting passages in ultra-large diameter shield tunnels. Background Technology

[0002] In general, subway projects are equipped with connecting passages (referred to as bypass passages) between the tunnels of the up and down lines. This allows passengers to get off the train immediately and safely evacuate to another tunnel through the bypass passage in the event of a fire or other accident in one of the tunnel sections during subway operation.

[0003] For ultra-large diameter shield tunnels, existing technologies, such as the shield tunnel connecting passage construction method in patent publication number CN117145494A, employ methods such as hoisting and traction. However, since the tunnel segments are in an interlocking and mutually attached state, traction into the tunnel can easily cause chipping and damage to other segments. Furthermore, the use of the specially designed K-shaped blocks disclosed in CN117145494A results in insufficient support of the segments for the tunnel wall. Therefore, a targeted automatic segment removal device is needed for the construction of shield tunnel connecting passages. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automated segment removal device for the construction of ultra-large diameter shield tunnel connecting passages, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automated segment removal device for the construction of connecting passages in ultra-large diameter shield tunnels includes a crossbeam, a docking sleeve fixedly connected to one side of the crossbeam, right-angle clamping plates fixedly connected to both ends of the crossbeam, and a rotary drilling and hole enlarging device on the crossbeam.

[0007] The rotary drilling and reaming device includes an annular guide rail, a slide block slidably connected to the guide rail, a side plate fixedly connected to the slide block, a first motor fixedly connected to the side plate, a swing rod mounted on the main shaft of the first motor, and a scraper provided at the end of the swing rod away from the first motor.

[0008] Preferably, the scraper is rotatably connected to the swing rod, the rotating shaft of the scraper extends into the swing rod and is fixedly connected to the gear and is provided with a return torsion spring, the swing rod is slidably connected to the slide rod, one end of the slide rod meshes with the gear, the other end of the slide rod extends out of the swing rod and is rotatably connected to the cylinder, the side plate is fixedly connected to the spiral structure plate, and the cylinder abuts against the inner side of the spiral structure plate.

[0009] Preferably, the swing rod and the slide rod are separate structures.

[0010] Preferably, a sleeve is provided at one end of the swing rod, the sleeve is fixedly connected to an extension tube, and an anchor rod is slidably connected inside the extension tube.

[0011] Preferably, a box body is fixedly connected to one side of the sleeve, and multiple shims are installed inside the box body. An electric push rod is fixedly connected to one end of the box body. The telescopic rod of the electric push rod extends into the box body and is fixedly connected to a push block. The push block is provided with a first magnet. The shims are sequentially attracted to the first magnet. The sleeve is provided with a through groove, and the shims can enter between the slide rod and the anchor rod through the through groove.

[0012] The side plate is rotatably connected to the ring, and the side plate is threadedly connected to the locking bolt. The locking bolt is used to lock the ring and the side plate. The spiral structure plate is fixedly connected to the ring. The spiral structure plate has a threaded hole, and the threaded hole is threadedly connected to the fixing pin. The fixing pin is set corresponding to the main shaft of the first motor. The swing rod is rotatably connected to the main shaft of the first motor and is equipped with a synchronous pin.

[0013] The cylinder contains a second magnet.

[0014] Preferably, one side of the scraper has an arc-shaped structure.

[0015] Preferably, a rubber pad is fixedly connected to the inner side of the right-angle plate.

[0016] The advantages of this invention are as follows: When the swing rod rotates counterclockwise, the scraper rotates clockwise. When the first motor drives the swing rod to rotate counterclockwise, the cylinder connected to one end of the inner slide rod of the swing rod abuts against the inner side of the spiral structure plate. Due to the spiral convergence effect of the spiral structure plate, the cylinder moves toward the axis of the first motor. The slide rod pushes the gear to make the scraper rotate, so as to adapt to the influence of the change of the swing rod angle on the cutting angle, thereby always keeping the cutting angle of the scraper appropriate.

[0017] In this invention, after the swing rod rotates to the angle for anchor bolt installation, it is fixed. The power transmission between the first motor and the swing rod is separated, and the locking bolt of the ring is loosened. The spiral structure plate is fixedly connected to the main shaft of the first motor, allowing the first motor to drive the spiral structure plate to rotate in both directions independently. The spiral structure plate rotates periodically in both directions, and the cylinder is attracted to the inner side of the spiral structure plate by the second magnet. Due to the gradual change in the inner diameter of the spiral structure plate, the sliding rod is periodically pushed forward or retracted. After the sliding rod retracts, a gap is formed between the anchor bolt and the sliding rod. The shim block is pushed into this gap and attracted to the tail end of the anchor bolt. With the next sliding rod push, the previous shim block is inserted into the inner wall of the connecting passage along with the sliding rod, creating a gap for the next shim block. Through the pushing of multiple shim blocks, the anchor bolt is pushed into the inner wall of the connecting passage. After the anchor bolt is in place, conventional grouting or anchoring is performed, thereby reinforcing the connecting passage and preventing instability of the tunnel inner wall that might occur during the removal of other shield tunnel segments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the basic structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection structure between the K-type block and the present invention, with the scraper located inside the guide rail;

[0020] Figure 3 This is the present invention. Figure 2 A magnified view of a portion at point E;

[0021] Figure 4 This is a schematic diagram showing the scraper located on the outside of the guide rail;

[0022] Figure 5 This is a schematic diagram showing the scraper moving from the inside of the guide rail to the outside of the guide rail;

[0023] Figure 6 This is a schematic diagram of the rotary drilling reaming device;

[0024] Figure 7 This is a schematic diagram of the structure of the anchor bolt of the present invention installed on the rotary drilling reaming device. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0026] like Figures 1-7 As shown, the automated segment removal device for the construction of the ultra-large diameter shield tunnel connecting passage provided by the present invention includes a crossbeam 1, a docking sleeve 11 fixedly connected to one side of the crossbeam 1 to facilitate connection and separation with the hydraulic jacking cylinder, right-angle clamping plates 12 fixedly connected to both ends of the crossbeam 1 respectively, a rubber pad 13 fixedly connected to the inner side of the right-angle clamping plate 12, and a rotary drilling and hole enlarging device 2 provided on the crossbeam 1.

[0027] K-shaped blocks 10 with round holes in the middle are prefabricated. The round holes are sealed with steel plates beforehand. K-shaped blocks 10 are laid at the location of the connecting passage as the tunnel boring machine advances. After the tunnel segments are laid, the steel plates are cut open and the excavation is carried out with the round holes of K-shaped blocks 10 as the reference.

[0028] The rotary drilling and reaming device 2 includes an annular guide rail 21, which is slidably connected to a slide block 22. The slide block 22 is driven by conventional power to slide on the guide rail 21. The slide block 22 is fixedly connected to a side plate 23, which is fixedly connected to a first motor 24. The main shaft of the first motor 24 is equipped with a swing rod 25. A scraper 26 is provided at the end of the swing rod 25 away from the first motor 24. One side of the scraper 26 has an arc-shaped structure 261, which facilitates the discharge of slag into the center of the circular hole of the K-type block 10.

[0029] Furthermore, the scraper 26 is rotatably connected to the swing rod 25. The rotating shaft of the scraper 26 extends into the swing rod 25 and is fixedly connected to the gear 27 and is provided with a return torsion spring. The swing rod 25 is slidably connected to the slide rod 28. One end of the slide rod 28 meshes with the gear 27, and the other end of the slide rod 28 extends out of the swing rod 25 and is rotatably connected to the cylinder 29. The side plate 23 is fixedly connected to the spiral structure plate 291, and the cylinder 29 abuts against the inner side of the spiral structure plate 291.

[0030] During construction, a reference hole is drilled in the tunnel wall through the round hole of the K-type block 10. The crossbeam 1 is fixed to the telescopic end of the jacking cylinder through the connecting sleeve 11. The jacking cylinder is pushed forward and locked onto the round hole of the K-type block 10 through the right angle clamping plate 12. The slide 22 slides on the guide rail 21. The reference hole is gradually enlarged by the scraper 26. The enlargement of the scraper 26 is achieved by rotating the swing rod 25 to change the position of the scraper 26.

[0031] During hole enlargement, due to the narrow space, the scraper 26 needs to be positioned at the center of the guide rail 21 first. The size of the enlarged hole is then changed by rotating the swing rod 25. Figure 5 As shown, the scraper 26 is ultimately positioned outside the guide rail 21. Since one side of the scraper 26 has an arc-shaped structure 261, a constant angular relationship needs to be formed with the cutting contour surface for easy cutting. In this invention, when the swing rod 25 rotates counterclockwise, the scraper 26 rotates clockwise. Figures 2-6 As shown, see in particular Figure 6 When the first motor 24 drives the swing arm 25 to rotate counterclockwise ( Figure 6 (In the direction of the arrow), the cylinder 29, which is rotatably connected to one end of the inner slide rod 28 of the swing rod 25, abuts against the inner side of the spiral structure plate 291. The cylinder 29 has a second magnet inside. Due to the spiral convergence effect of the spiral structure plate 291, the cylinder 29 moves toward the axis of the first motor 24. The slide rod 28 pushes the gear 27 to make the scraper 26 rotate, so as to adapt to the influence of the change of the angle of the swing rod 25 on the cutting angle, thereby always keeping the cutting angle of the scraper 26 appropriate.

[0032] Furthermore, the swing rod 25 and the slide rod 28 are each a separate structure, that is, the entire swing rod 25 or slide rod 28 is broken in the middle, and the outer end of the swing rod 25 or slide rod 28 can be replaced with an extension rod. When a larger hole needs to be enlarged, the swing rod 25 is rotated back to the initial angle, and the extended swing rod 25 and slide rod 28 are replaced to adapt to the hole enlargement requirements of communication channels with different diameters.

[0033] Furthermore, a sleeve 3 is provided at one end of the swing rod 25, and the sleeve 3 is fixedly connected to the extension tube 31. An anchor rod 32 is slidably connected inside the extension tube 31. The anchor rod 32 is used to drive into the inner wall of the connecting channel for reinforcement.

[0034] After multiple anchor bolts 32 are driven into the inner wall of the connecting passage in a circular array, the jacking cylinder pushes the K-shaped block 10 into the connecting passage, removes the connection between the docking sleeve 11 and the jacking cylinder, and removes the jacking cylinder. After the other segments on the inner wall of the tunnel outside the connecting passage are adsorbed by the robot or vacuum adsorption of conventional equipment, the fixing bolts of the other segments are removed. Since the K-shaped block 10 is pushed into the connecting passage, the other segments can be easily removed.

[0035] Furthermore, a box 33 is fixedly connected to one side of the sleeve 3. The box 33 contains a plurality of shims 34. An electric push rod 35 is fixedly connected to one end of the box 33. The telescopic rod of the electric push rod 35 extends into the box 33 and is fixedly connected to a push block 36. The push block 36 is provided with a first magnet. The shims 34 are sequentially attracted to the first magnet. The sleeve 3 is provided with a through groove, and the shims 34 can enter between the slide rod 28 and the anchor rod 32 through the through groove.

[0036] The side plate 23 is rotatably connected to the ring 37, and the side plate 23 is threadedly connected to the locking bolt. The locking bolt is used to lock the ring 37 and the side plate 23. The spiral structure plate 291 is fixedly connected to the ring 37. The spiral structure plate 291 is provided with a threaded hole 38. The threaded hole 38 is internally threaded to a fixing pin. The fixing pin is correspondingly set to the main shaft of the first motor 24. The swing rod 25 is rotatably connected to the main shaft of the first motor 24 and is provided with a synchronous pin.

[0037] After the swing rod 25 rotates to the angle for driving the anchor rod 32 and is fixed, the power transmission between the first motor 24 and the swing rod 25 is separated, and the locking bolt of the ring 37 is loosened. The spiral structure plate 291 is fixedly connected to the main shaft of the first motor 24, so that the forward and reverse rotation of the first motor 24 drives the spiral structure plate 291 to rotate forward and reverse. The forward and reverse periodic rotation of the spiral structure plate 291 causes the cylinder 29 to be attracted to the inner side of the spiral structure plate 291 by the second magnet. Due to the gradual change in the inner diameter of the spiral structure plate 291, the sliding rod 28 is periodically pushed forward or retracted. After the rod 28 retracts, a gap is formed between the anchor rod 32 and the sliding rod 28. The shim block 34 is pushed into this gap and adheres to the tail end of the anchor rod 32. With the next push of the sliding rod 28, the previous shim block 34 is inserted into the inner wall of the connecting passage along with the sliding rod 28, forming a gap for the next shim block 34 to enter. Through the push of multiple shim blocks 34, the anchor rod 32 is pushed into the inner wall of the connecting passage. After the anchor rod 32 is pushed into place, conventional grouting or anchoring is carried out to reinforce the connecting passage and prevent the instability of the tunnel inner wall that may be caused by the removal of other shield tunnel segments.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated segment removal device for the construction of a connecting passage in an ultra-large diameter shield tunnel, comprising a crossbeam (1), a connecting sleeve (11) fixedly connected to one side of the crossbeam (1), right-angle clamping plates (12) fixedly connected to both ends of the crossbeam (1), and a rotary drilling and hole enlarging device (2) provided on the crossbeam (1), characterized in that: The rotary drilling and reaming device (2) includes an annular guide rail (21), the guide rail (21) is slidably connected to a slide block (22), the slide block (22) is fixedly connected to a side plate (23), the side plate (23) is fixedly connected to a first motor (24), the main shaft of the first motor (24) is equipped with a swing rod (25), and a scraper (26) is provided at the end of the swing rod (25) away from the first motor (24); The scraper (26) is rotatably connected to the swing rod (25). The rotating shaft of the scraper (26) extends into the swing rod (25) and is fixedly connected to the gear (27) and is equipped with a return torsion spring. The swing rod (25) is slidably connected to the slide rod (28). One end of the slide rod (28) meshes with the gear (27), and the other end of the slide rod (28) extends out of the swing rod (25) and is rotatably connected to the cylinder (29). The side plate (23) is fixedly connected to the spiral structure plate (291), and the cylinder (29) abuts against the inner side of the spiral structure plate (291).

2. The automated segment removal device for the construction of ultra-large diameter shield tunnel connecting passages according to claim 1, characterized in that: The swing rod (25) and the slide rod (28) are each a separate structure.

3. The automated segment removal device for the construction of ultra-large diameter shield tunnel connecting passages according to claim 2, characterized in that: The swing rod (25) is provided with a sleeve (3) at one end, the sleeve (3) is fixedly connected to the extension tube (31), and the anchor rod (32) is slidably connected inside the extension tube (31).

4. The automated segment removal device for the construction of ultra-large diameter shield tunnel connecting passages according to claim 3, characterized in that: The sleeve (3) is fixedly connected to the box body (33) on one side. The box body (33) contains multiple shims (34). The box body (33) is fixedly connected to the electric push rod (35) at one end. The telescopic rod of the electric push rod (35) extends into the box body (33) and is fixedly connected to the push block (36). The push block (36) is provided with a first magnet. The shims (34) are attracted to the first magnet in sequence. The sleeve (3) is provided with a through groove. The shims (34) can enter between the slide rod (28) and the anchor rod (32) through the through groove. The side plate (23) is rotatably connected to the ring (37), and the side plate (23) is threadedly connected to the locking bolt. The locking bolt is used to lock the ring (37) and the side plate (23). The spiral structure plate (291) is fixedly connected to the ring (37). The spiral structure plate (291) is provided with a threaded hole (38). The threaded hole (38) is internally threaded to a fixing pin. The fixing pin is correspondingly set to the main shaft of the first motor (24). The swing rod (25) is rotatably connected to the main shaft of the first motor (24) and is provided with a synchronous pin. The cylinder (29) has a second magnet inside.

5. The automated segment removal device for the construction of ultra-large diameter shield tunnel connecting passages according to claim 1, characterized in that: The scraper (26) has an arc-shaped structure (261) on one side.

6. The automated segment removal device for the construction of ultra-large diameter shield tunnel connecting passages according to claim 1, characterized in that: The rubber pad (13) is fixedly connected to the inner side of the right-angle plate (12).

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