CN118065763A - Automated segment removal device for construction of super-large diameter shield tunnel connection channel - Google Patents

Abstract

The invention discloses an automatic duct piece dismantling device for construction of a communication channel of a super-large-diameter shield tunnel, which comprises a cross beam, wherein one side of the cross beam is fixedly connected with a butt joint sleeve, two ends of the cross beam are respectively and fixedly connected with a right-angle clamping plate, and the cross beam is provided with a rotary digging reaming device; the rotary digging reaming device comprises an annular guide rail, the guide rail is in sliding connection with a sliding seat, the sliding seat is fixedly connected with a side plate, the side plate is fixedly connected with a first motor, a main shaft of the first motor is provided with a swinging rod, and one end of the swinging rod, which is far away from the first motor, is provided with a scraper. According to the invention, the scraper rotates by pushing the gear through the slide bar, so that the influence of the angle change of the swinging rod on the soil cutting angle is adapted, and the cutting angle of the scraper is always kept suitable.

Description

Automated segment removal device for construction of super-large diameter shield tunnel connection channel

Technical Field

The invention relates to the technical field of tunnel construction, and in particular to an automatic segment removal device for construction of a connecting channel of an ultra-large diameter shield tunnel.

Background technique

Generally, subway projects have connecting passages (referred to as side passages) between the uplink and downlink tunnels so that when a fire or accident occurs in one of the tunnels during subway operation, passengers can get off the train in an emergency and evacuate safely to another tunnel through the side passages.

For shield tunnels with extra-large diameters, existing technologies, such as the shield tunnel connecting channel construction method disclosed in patent announcement number CN117145494A, adopt hoisting, traction and other methods. Since the tunnel segments are in a state of interlocking and mutual adhesion, traction into the tunnel is likely to cause corner collapse and damage to other segments. The use of the special K-shaped blocks disclosed in CN117145494A makes the segments insufficiently support the inner wall of the tunnel. Therefore, a targeted automatic segment removal device is needed to carry out the construction of shield tunnel connecting channels.

Summary of the invention

The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose an automatic segment removal device for the construction of a connecting channel of an ultra-large diameter shield tunnel, thereby solving the problems existing in the prior art.

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

The automatic segment removal device for the construction of the connecting channel of the super-large diameter shield tunnel includes a crossbeam, one side of the crossbeam is fixedly connected to the docking sleeve, the two ends of the crossbeam are respectively fixedly connected to the right-angle clamping plate, and the crossbeam is provided with a rotary drilling and expanding device;

The rotary drilling and reaming device includes an annular guide rail, which is slidably connected to a slide seat, which is fixedly connected to a side plate, which is fixedly connected to a first motor, a main shaft of the first motor is equipped with a swing rod, and a scraper is provided at one end of the swing rod away from the first motor.

Preferably, the scraper is rotatably connected to the swing rod, the scraper's rotating shaft extends into the swing rod and is fixedly connected to a gear and a reset rotation torsion spring is provided, the swing rod is slidably connected to a slide rod, one end of the slide rod is engaged with the gear, and the other end of the slide rod extends out of the swing rod and is rotatably connected to a 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.

Preferably, the swing rod and the sliding rod are respectively in separate structures.

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

Preferably, one side of the sleeve is fixedly connected to the box body, a plurality of spacer blocks are installed in the box body, one end of the box body is fixedly connected to the electric push rod, the telescopic rod of the electric push rod extends into the box body and is fixedly connected to the push block, the push block is provided with a first magnet, the spacer blocks are sequentially adsorbed on the first magnet, the sleeve is provided with a through slot, and the spacer blocks can enter between the slide rod and the anchor rod through the through slot;

The side plate is rotatably connected to the circular ring, and the side plate is threadedly connected to the locking bolt, the locking bolt is used to lock the circular ring and the side plate, the spiral structure plate is fixedly connected to the circular ring, the spiral structure plate is provided with a threaded hole, the threaded hole is threadedly connected to the fixing pin, the fixing pin is arranged corresponding to the main shaft of the first motor, the swing arm is rotatably connected to the main shaft of the first motor and is provided with a synchronous latch;

The cylinder has a second magnet built into it.

Preferably, one side of the scraper is in an arc-shaped structure.

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

The advantages of the present invention are: when the swing arm is rotated counterclockwise by the swing rod in the automatic segment removal device for the construction of the connecting channel of the super-large diameter shield tunnel provided by the present invention, the scraper rotates clockwise; when the first motor drives the swing arm to rotate counterclockwise, the cylinder connected to one end of the sliding rod inside the swing arm is rotatably connected to 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, and the gear is pushed by the sliding rod to rotate the scraper to adapt to the influence of the swing arm angle change on the soil cutting angle, thereby always keeping the scraper cutting angle appropriate.

The present invention fixes the swing arm after it rotates to the angle for applying the anchor rod, separates the power transmission between the first motor and the swing arm, and the locking bolt of the circular ring is loosened, and the spiral structure plate is fixedly connected to the main shaft of the first motor, so that the first motor rotates forward and reversely to drive the spiral structure plate to rotate forward and reversely alone. The spiral structure plate rotates forward and reverse periodically, and the cylinder is adsorbed on the inner side of the spiral structure plate by the second magnet. Due to the gradual change of the inner diameter of the spiral structure plate, the sliding rod is periodically advanced or retracted. After the sliding rod retracts, a gap is formed between the anchor rod and the sliding rod, and the padding block is pushed into the gap and adsorbed on the tail end of the anchor rod. With the next push of the sliding rod, the previous padding block is inserted into the inner wall of the communication channel with the sliding rod, and a gap is formed for the next padding block to enter. The anchor rod is pushed into the inner wall of the communication channel by the push of multiple padding blocks. After the anchor rod is pushed into place, grouting or anchoring of the conventional structure is carried out, thereby reinforcing the communication channel to avoid the instability of the inner wall of the tunnel caused by the removal of the remaining shield segments.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the basic structure of the present invention;

Fig. 2 is a schematic diagram of the connection structure of the K-type block and the present invention, and the scraper is located on the inner side of the guide rail;

FIG3 is a partial enlarged view of point E of FIG2 of the present invention;

FIG4 is a schematic diagram of a scraper located outside the guide rail;

FIG5 is a schematic diagram of the scraper moving from the inner side of the guide rail to the outer side of the guide rail;

FIG6 is a schematic diagram of the structure of a rotary drilling and reaming device;

FIG. 7 is a schematic diagram of the structure of the anchor rod of the present invention installed on the rotary drilling and reaming device.

Detailed ways

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.

As shown in FIGS. 1 to 7 , the automatic segment removal device for the construction of the connecting channel of a super-large diameter shield tunnel provided by the present invention comprises a crossbeam 1, one side of the crossbeam 1 is fixedly connected to a docking sleeve 11, which is convenient for connecting and separating with a hydraulic jacking cylinder, and both ends of the crossbeam 1 are respectively fixedly connected to right-angle clamping plates 12, the inner side of the right-angle clamping plates 12 is fixedly connected to a rubber pad 13, and the crossbeam 1 is provided with a rotary drilling and reaming device 2;

A K-shaped block 10 with a circular hole in the middle is prefabricated, and the circular hole is sealed with a steel plate in advance. The K-shaped block 10 is laid at the position of the communication channel as the shield machine moves forward. After the tunnel segments are laid, the steel plate is cut open and the excavation is expanded based on the circular hole of the K-shaped block 10.

The rotary drilling and reaming device 2 includes an annular guide rail 21, which is slidably connected to a slide seat 22. The slide seat 22 is driven to slide on the guide rail 21 by conventional power. The slide seat 22 is fixedly connected to a side plate 23, and the side plate 23 is fixedly connected to a first motor 24. A swing rod 25 is installed on the main shaft of the first motor 24. A scraper 26 is provided at one end of the swing rod 25 away from the first motor 24. One side of the scraper 26 is an arc-shaped structure 261, which is convenient for discharging slag to the middle of the circular hole of the K-type block 10.

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 a reset rotation torsion spring is set, the swing rod 25 is slidably connected to the slide rod 28, one end of the slide rod 28 is engaged 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.

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

When expanding the hole, due to the narrow space, the scraper 26 needs to be located at the center of the guide rail 21 first, and the size of the expanded hole is changed by rotating the swing rod 25, as shown in Figure 5, and finally the scraper 26 is located outside the guide rail 21. Since one side of the scraper 26 is an arc-shaped structure 261, it is necessary to form a constant angle relationship with the soil cutting contour surface to facilitate soil cutting. When the swing rod 25 rotates counterclockwise in the present invention, the scraper 26 rotates clockwise, as shown in Figures 2 to 6, especially referring to Figure 6. When the first motor 24 drives the swing rod 25 to rotate counterclockwise (in the direction of the arrow in Figure 6), the cylinder 29 connected to one end of the sliding rod 28 in the swing rod 25 is rotated and abuts against the inner side surface of the spiral structure plate 291. The cylinder 29 has a second magnet built in it. Due to the spiral gathering effect of the spiral structure plate 291, the cylinder 29 moves toward the axis of the first motor 24, and the gear 27 is pushed by the sliding rod 28 to rotate the scraper 26 to adapt to the influence of the angle change of the swing rod 25 on the soil cutting angle, thereby always keeping the cutting angle of the scraper 26 appropriate.

Furthermore, the swing rod 25 and the slide rod 28 are respectively split structures, that is, the entire swing rod 25 or the slide rod 28 is disconnected in the middle, and the outer end of the swing rod 25 or the slide rod 28 can be replaced with an extension rod. When a larger hole needs to be expanded, the swing rod 25 is rotated back to the initial angle, and the extended swing rod 25 and the slide rod 28 are replaced to meet the hole expansion requirements of communication channels with different diameters.

Furthermore, a sleeve 3 is provided at one end of the swing rod 25, and the sleeve 3 is fixedly connected to an extension tube 31, and an anchor rod 32 is slidably connected inside the extension tube 31, and the anchor rod 32 is used to be injected into the inner wall of the communication channel for reinforcement.

After multiple anchor rods 32 are injected into the circular array on the inner wall of the connecting channel, the jacking cylinder pushes the K-block 10 into the connecting channel, removes the connection between the docking sleeve 11 and the jacking cylinder, and removes the jacking cylinder. After the other pipe segments on the inner wall of the tunnel outside the connecting channel are adsorbed by the manipulator or vacuum adsorption of conventional equipment, the direct fixing bolts of the other pipe segments are removed. Since the K-block 10 is pushed into the connecting channel, the other pipe segments can be easily removed.

Further, one side of the sleeve 3 is fixedly connected to the box body 33, and a plurality of spacer blocks 34 are installed in the box body 33. One end of the box body 33 is fixedly connected to the electric push rod 35. 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, and the spacer blocks 34 are sequentially adsorbed on the first magnet. The sleeve 3 is provided with a through slot, and the spacer blocks 34 can enter between the slide rod 28 and the anchor rod 32 through the through slot;

The side plate 23 is rotatably connected to the circular ring 37, and the side plate 23 is threadedly connected to the locking bolt, and the locking bolt is used to lock the circular ring 37 and the side plate 23. The spiral structure plate 291 is fixedly connected to the circular ring 37. The spiral structure plate 291 is provided with a threaded hole 38. The threaded hole 38 is internally threaded to connect a fixing pin, and the fixing pin is arranged corresponding to the main shaft of the first motor 24. The swing arm 25 is rotatably connected to the main shaft of the first motor 24 and is provided with a synchronous pin.

After the swing rod 25 rotates to the angle where the anchor rod 32 is applied, it 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 first motor 24 rotates forward and reverse to drive 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 adsorbed on the inner side of the spiral structure plate 291 through the second magnet. Due to the gradual change in the inner diameter of the spiral structure plate 291, the sliding rod 28 is periodically advanced or retracted. After the rod 28 retracts, a gap is formed between the anchor rod 32 and the slide rod 28, and the pad block 34 is pushed into the gap and adsorbed on the tail end of the anchor rod 32. With the next push of the slide rod 28, the previous pad block 34 is inserted into the inner wall of the communication channel along with the slide rod 28, forming a gap for the next pad block 34 to enter. By pushing multiple pad blocks 34, the anchor rod 32 is pushed into the inner wall of the communication channel. After the anchor rod 32 is pushed into place, conventional structural grouting or anchoring is carried out to reinforce the communication channel to avoid the instability of the inner wall of the tunnel caused by the removal of the remaining shield segments.

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 (7)

1. An automatic segment removal device for construction of a connecting channel of an ultra-large diameter shield tunnel, comprising a crossbeam (1), one side of the crossbeam (1) is fixedly connected to a docking sleeve (11), both ends of the crossbeam (1) are respectively fixedly connected to right-angle clamping plates (12), and the crossbeam (1) is provided with a rotary drilling and expanding device (2), characterized in that: The rotary drilling and reaming device (2) comprises an annular guide rail (21), the guide rail (21) is slidably connected to a slide seat (22), the slide seat (22) is fixedly connected to a side plate (23), the side plate (23) is fixedly connected to a first motor (24), a main shaft of the first motor (24) is provided with a swing rod (25), and a scraper (26) is provided at one end of the swing rod (25) away from the first motor (24). 2. According to claim 1, the automatic segment removal device for the construction of the connecting channel of the super-large diameter shield tunnel is characterized in that: 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 a reset rotation torsion spring is provided, the swing rod (25) is slidably connected to the slide rod (28), one end of the slide rod (28) is meshed 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) contacts the inner side of the spiral structure plate (291). 3. The automatic segment removal device for the construction of the connecting channel of a super-large diameter shield tunnel according to claim 2 is characterized in that the swing rod (25) and the slide rod (28) are respectively in a split structure. 4. The automatic segment removal device for the construction of the connecting channel of a super-large diameter shield tunnel according to claim 2 is characterized in that a sleeve (3) is arranged at one end of the swing rod (25), the sleeve (3) is fixedly connected to the extension tube (31), and the extension tube (31) is slidably connected to the anchor rod (32). 5. The automatic segment removal device for the construction of the connecting channel of the super-large diameter shield tunnel according to claim 4 is characterized in that: one side of the casing (3) is fixedly connected to the box body (33), a plurality of padding blocks (34) are installed in the box body (33), one end of the box body (33) is fixedly connected to the electric push rod (35), 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 padding blocks (34) are sequentially adsorbed on the first magnet, the casing (3) is provided with a through slot, and the padding blocks (34) can enter between the slide rod (28) and the anchor rod (32) through the through slot; The side plate (23) is rotatably connected to the circular ring (37), and the side plate (23) is threadedly connected to the locking bolt, the locking bolt is used to lock the circular ring (37) and the side plate (23), the spiral structure plate (291) is fixedly connected to the circular ring (37), the spiral structure plate (291) is provided with a threaded hole (38), the threaded hole (38) is internally threadedly connected to a fixing pin, the fixing pin is arranged corresponding 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 latch; The cylinder (29) has a second magnet built in it. 6. The automatic segment removal device for construction of a connecting channel of a super-large diameter shield tunnel according to claim 1 is characterized in that one side of the scraper (26) is an arc-shaped structure (261). 7. The automatic segment removal device for the construction of the connecting channel of a super-large diameter shield tunnel according to claim 1 is characterized in that a rubber pad (13) is fixedly connected to the inner side of the right-angle clamping plate (12).