CN220888645U

CN220888645U - Auxiliary structure for removing pile foundation in shield tunnel range

Info

Publication number: CN220888645U
Application number: CN202322450024.4U
Authority: CN
Inventors: 范雨; 吴彬; 曹伟杨; 刘杰; 李宏伟
Original assignee: Guangzhou Metro Construction Management Co ltd; CCCC Tunnel Engineering Co Ltd; Guangzhou Metro Group Co Ltd
Current assignee: Guangzhou Metro Construction Management Co ltd; CCCC Tunnel Engineering Co Ltd; Guangzhou Metro Group Co Ltd
Priority date: 2023-09-08
Filing date: 2023-09-08
Publication date: 2024-05-03
Anticipated expiration: 2033-09-08

Abstract

The application relates to an auxiliary structure for removing pile foundations in a shield tunnel range, which belongs to the field of pile foundation removing devices and comprises the following components: the piston rod of the bottom hydraulic cylinder extends vertically upwards; the mounting ring is fixedly connected with a piston rod of the bottom hydraulic cylinder, an external abutting block is arranged along the circumferential direction of the mounting ring and slides along the radial direction of the mounting ring, and the external abutting block moves in opposite directions to abut against the outer wall of the pile foundation so as to clamp the pile foundation from the outside; the top hydraulic cylinder is arranged above the bottom hydraulic cylinder, and a piston rod of the top hydraulic cylinder extends vertically downwards; the mounting disc is fixedly connected with a piston rod of the top hydraulic cylinder, inner propping blocks are uniformly arranged along the circumferential direction of the mounting disc and slide along the radial direction of the mounting disc, and the inner propping blocks move in opposite directions to prop up the pile foundation from the inside; the backup pad, vertical setting, its top rotates and is connected with the mounting panel, and top pneumatic cylinder body rigid coupling is in the mounting panel bottom. The application has the effect of improving the efficiency of the pile pulling process.

Description

Auxiliary structure for removing pile foundation in shield tunnel range

Technical Field

The application relates to the field of pile foundation cleaning devices, in particular to an auxiliary structure for cleaning a pile foundation in the range of a shield tunnel.

Background

The shield tunnel is a modern tunneling method, when the tunnel burial depth is shallow, the reinforced concrete pile foundation is often caused to invade the tunnel range, for example, a shield machine is used for directly cutting and invading a pile foundation, so that the pile foundation is easily caused to wind around a shield machine cutterhead to continuously detour surrounding soil body and even lock the shield machine cutterhead. In order to ensure the smooth construction of the shield, a oar is required to invade and limit the pile foundation to be cleared. The construction method for removing the obstacle piles generally comprises a pile pulling method, a pile punching method, a blasting method and the like.

The hydraulic tube drawing machine is main equipment in a pile drawing method and comprises a base, a hydraulic cylinder is vertically arranged on the base, a piston rod of the hydraulic cylinder vertically extends upwards, a top cover is fixedly arranged at the end part of the piston rod of the hydraulic cylinder, the top cover moves vertically along with the expansion and contraction of the piston rod, and communication holes are formed in the same positions of the middle part of the top cover and the middle part of the base. The top cover bottom is provided with two and supports tight board, and two support tight board and move in opposite directions or in opposite directions along the top cover level, and when two support tight board and move in opposite directions, press from both sides tight pile foundation.

The hydraulic pipe drawing machine is used in the process that firstly, a base is placed on a pile foundation, and the pile foundation extending to the outside of a soil layer extends upwards from a communicating hole on the base; the two abutting plates move in opposite directions until the pile foundation is abutted tightly, so that the piston rod of the hydraulic cylinder is extended, the top cover is driven to vertically move upwards, and the pile foundation is pulled upwards. In the pile pulling process, the pile pulling device is usually matched with a hoisting device, when the end part of the pile foundation extends to the outside of the top cover from the communication hole on the top cover, a worker is enabled to use a steel rope or the like to connect the pile foundation with the hoisting device, the pile foundation is kept at a certain height by means of the hoisting device, then the piston rod of the hydraulic cylinder is retracted, the abutting block is clamped at the position, close to the soil layer, of the pile foundation, the piston rod of the hydraulic cylinder is extended again, and the pile foundation is pulled out of the soil layer. Finally, the pile foundation is transported to a pile foundation storage area by using a hoisting device.

In view of the above related art, the inventor considers that the hydraulic pipe drawing machine needs to be matched with the hoisting device when in use, and needs a worker to climb on the top of the hydraulic pipe drawing machine in the working process, so that the pile foundation is connected with the hoisting device through the rope. The pile foundation and the hoisting device are connected in a complex process, so that the efficiency of the whole pile pulling process is reduced.

Disclosure of utility model

In order to improve the efficiency of a pile pulling process, the application provides an auxiliary structure for removing pile foundations in the range of a shield tunnel.

The application provides an auxiliary structure for removing pile foundations in a shield tunnel range, which adopts the following technical scheme:

An auxiliary structure for pile foundation removal in a shield tunnel range, comprising:

the bottom hydraulic cylinder is vertically arranged, and a piston rod of the bottom hydraulic cylinder extends vertically upwards;

The mounting ring is fixedly connected with a piston rod of the bottom hydraulic cylinder, external abutting blocks are uniformly arranged along the circumferential direction of the mounting ring and slide along the radial direction of the mounting ring, and the external abutting blocks move in opposite directions to abut against the outer wall of the pile foundation so as to clamp the pile foundation from the outside;

The top hydraulic cylinder is vertically arranged above the bottom hydraulic cylinder, and a piston rod of the top hydraulic cylinder vertically extends downwards;

The mounting disc is fixedly connected with a piston rod of the top hydraulic cylinder, inner abutting blocks are uniformly arranged along the circumferential direction of the mounting disc, the inner abutting blocks slide along the radial direction of the mounting disc, and the inner abutting blocks move back to each other to abut against the inner wall of the pile foundation, so that the pile foundation is abutted from the inside;

The backup pad, vertical setting, its top rotates and is connected with the mounting panel, and top pneumatic cylinder body rigid coupling is in the mounting panel bottom.

Through adopting above-mentioned technical scheme, when pile pulling, at first make outside support tight piece radial to collar center motion along the collar to make the tip of outside support tight piece support tightly at the pile foundation outer wall with the pile foundation from outside clamp. Simultaneously, make the piston rod extension of top pneumatic cylinder, drive the mounting disc vertical motion to the same high position department with the mounting disc to make inside tight piece of supporting follow radial to the mounting disc center motion of mounting disc, so that the tip of inside tight piece of supporting supports tightly at the pile foundation inner wall with the pile foundation from inside tightly.

The inner and outer parts of the pile foundation are clamped together by the inner abutting blocks and the outer abutting blocks, so that the pile foundation is connected with the auxiliary structure more stably, and the pile foundation is pulled upwards conveniently.

After propping, the pile foundation is pulled up under the drive of the bottom hydraulic cylinder and the top hydraulic cylinder, and in the pulling process, the mounting ring can return to a position closer to the soil layer for a plurality of times under the drive of the bottom hydraulic cylinder, so that the pile foundation can be pulled up conveniently; the inner abutting block is always abutted with the inner wall of the pile foundation, so that the pile foundation is kept at a certain height and does not fall off when the outer abutting block is separated from the outer wall of the pile foundation to move downwards.

Above-mentioned pile pulling in-process, inside supports tight piece and has replaced hoist device's effect at traditional pile pulling in-process to utilize pile foundation structure, need not the manual work and be connected it with the pile foundation, save the work wherein with hoist device and pile foundation connection, reduce staff's working strength, and practice thrift operating time, improve the efficiency of whole pile pulling process.

After making the pile foundation break away from the soil layer completely, make outside tight piece of supporting continuously press from both sides tight pile foundation, inside tight piece of supporting breaks away from with the pile foundation inner wall after, vertical motion to the bottom of pile foundation to with the pile foundation bottom inner wall support tightly. And then, the external abutting block is separated from the outer wall of the pile foundation, and the piston rod of the bottom hydraulic cylinder and the piston rod of the top hydraulic cylinder are retracted. The mounting plate rotates 180 degrees around the supporting plate, so that the internal abutting block is separated from the inner wall of the pile foundation.

Pile pulling and discharging of pile foundations can be independently achieved through the mechanism, and a hoisting pile foundation is not required to be additionally arranged.

Optionally, a driving toothed ring is rotationally connected to the mounting ring, an archimedes spiral groove I is formed in the bottom side of the driving toothed ring, a tooth part I is formed in the side surface of the external abutting block, corresponding to the driving toothed ring, and the tooth part I is meshed with the archimedes spiral groove I;

The mounting ring is provided with a first guide groove corresponding to the movement direction of the external abutting block, and the external abutting block slides along the length direction of the first guide groove.

By adopting the technical scheme, the driving toothed ring rotates to provide power for the movement of the external abutting block, and the guide groove I guides the movement of the external abutting block, so that the driving toothed ring rotates to drive the external abutting block to synchronously move along the axial direction of the mounting ring.

Optionally, the outer wall of the driving gear ring is provided with a first driving gear, and the first driving gear is meshed with the first driving gear;

the mounting ring is fixedly provided with a first driving motor, and an output shaft of the first driving motor is fixedly connected to the middle of the first driving gear.

Through adopting above-mentioned technical scheme, driving motor's output shaft rotates, drives driving gear one and rotates, and then drives the rotation of drive ring gear, provides power for the rotation of drive ring gear.

Optionally, a driving turntable is rotationally connected to the mounting plate, an archimedes spiral groove II is formed in the bottom side of the driving turntable, a tooth part II is formed in the inner abutting block, corresponding to the side surface of the driving turntable, and the tooth part II is meshed with the archimedes spiral groove II;

And a second guide groove is formed in the mounting plate corresponding to the movement direction of the inner abutting block, and the inner abutting block slides along the length direction of the second guide groove.

Through adopting above-mentioned technical scheme, the drive carousel rotates and provides power for inside tight piece motion of supporting to the guide slot II is the motion direction of inside tight piece of supporting, thereby makes the drive carousel rotate and can drive the inside tight piece of supporting and move along the axial of collar in step.

Optionally, a second driving tooth is arranged on the outer wall of the driving turntable, and the second driving tooth is meshed with a second driving gear;

The second driving motor is fixedly arranged on the mounting plate, and an output shaft of the second driving motor is fixedly connected to the middle of the second driving gear.

Through adopting above-mentioned technical scheme, driving motor's output shaft rotates, drives driving gear two and rotates, and then drives driving gear and rotate, provides power for driving gear rotation.

Optionally, the outside supports tight piece tip and sets up to with pile foundation outer wall complex arc.

Through adopting above-mentioned technical scheme, increase outside tightly supports the area of contact between piece and the pile foundation to make the outside tightly support and be connected between piece and the pile foundation more firm.

Optionally, the opposite two sides of the external abutting block are inwards recessed to form a first groove, a first sliding block matched with the first groove is fixedly arranged on the inner wall of the first guide groove, and the first sliding block slides along the length direction of the first groove.

Through adopting above-mentioned technical scheme, slider one inlays to be established and gets into recess one in, in the outside tight piece one of supporting along the in-process that the length direction of guide way one slided, restricts the outside and supports the position on the vertical direction of tight piece one, makes the outside support tight piece slide at the same height all the time.

Optionally, the two opposite sides of the inner abutting block are inwards recessed to form a groove II, a sliding block II matched with the groove I is fixedly arranged on the inner wall of the guide groove II, and the sliding block II slides along the length direction of the groove II.

Through adopting above-mentioned technical scheme, slider two inlay establish get into recess two in, in the inside tight piece of support two follow the length direction in second guide way in-process that slides, the restriction is inside to support the position on the vertical direction of tight piece two, makes inside tight piece of support slide at the same height all the time.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

Fig. 2 is a sectional view showing the first guide groove in the embodiment.

FIG. 3 is a schematic view showing the shape of the end of the external abutment in the embodiment.

Fig. 4 is an enlarged view of a portion a in fig. 1.

Fig. 5 is a cross-sectional view showing the second guide groove in the embodiment.

Reference numerals illustrate: 1. a base; 11. a bottom hydraulic cylinder; 12. a top plate; 13. a communication port; 14. a support column; 2. a mounting ring; 21. driving the toothed ring; 211. an Archimedes spiral groove I; 212. a first driving tooth; 22. a first guide groove; 221. a first sliding block; 23. an external abutment block; 231. a groove I; 232. a first tooth part; 24. driving a first motor; 241. a first driving gear; 3. a support plate; 31. a mounting plate; 32. a top hydraulic cylinder; 4. a mounting plate; 41. driving a turntable; 411. archimedes spiral groove II; 412. a second driving tooth; 42. a second guide groove; 421. a second slide block; 43. an internal tightening block; 431. a second groove; 432. a tooth part II; 44. a second driving motor; 441. and a second driving gear.

Detailed Description

The application is described in further detail below with reference to fig. 1-5.

The embodiment of the application discloses an auxiliary structure for removing pile foundations in a shield tunnel range. Referring to fig. 1, an auxiliary structure for pile foundation cleaning in a shield tunnel range comprises a base 1, wherein the base 1 is arranged in a flat plate shape and horizontally arranged at the bottommost part. The position department that is close to both ends at base 1 top vertically has set firmly bottom pneumatic cylinder 11, and the piston rod of bottom pneumatic cylinder 11 vertically upwards extends, and the piston rod tip of base 1 pneumatic cylinder is connected with same roof 12 jointly, and roof 12 level sets up. The same communication port 13 is formed in the middle position of the top plate 12 and the base 1, and the communication port 13 provides a channel for pile foundation movement.

Referring to fig. 1, a plurality of support columns 14 are fixedly arranged at the bottom of the top plate 12, and the support columns 14 are vertically arranged, 4 support columns are illustrated in the drawing, but not limited to 4 support columns.

Referring to fig. 2, the same mounting ring 2 is fixedly connected to the bottom of the support column 14, the mounting ring 2 is in a ring shape, a driving toothed ring 21 is embedded in the top of the mounting ring 2, the driving toothed ring 21 is coaxially arranged and rotatably connected with the mounting ring 2, an archimedes spiral groove one 211 is formed in the bottom side of the driving toothed ring 21, and a driving tooth one 212 is arranged on the outer side wall of the driving toothed ring 21.

Referring to fig. 1 and 2, the mounting ring 2 is provided with a plurality of guide grooves 22, three of which are illustrated as an example, but not limited to, three. The first guide grooves 22 are uniformly distributed around the circumference of the mounting ring 2, and the length direction is arranged along the radial direction of the mounting ring 2. The first guide groove 22 is slidably connected with an external abutting block 23, and the external abutting block 23 horizontally slides along the length direction of the first guide groove 22.

Referring to fig. 2, two opposite inner side walls of the first guide groove 22 are fixedly provided with first sliding blocks 221, two opposite sides of the corresponding external abutting block 23 are inwards recessed to form a first groove 231, and the first sliding blocks 221 slide along the length direction of the first groove in the process of moving the external abutting block 23 along the first guide groove 22. The first sliding block 221 is embedded into the first groove 231, and limits the position of the first external abutting block 23 in the vertical direction in the process that the first external abutting block 23 slides along the length direction of the first guide groove 22, so that the external abutting block 23 slides at the same height all the time.

Referring to fig. 2, the outer abutment 23 is provided with a first tooth 232 on a side surface corresponding to the driving ring 21, and the first tooth 232 is engaged with the first archimedes spiral groove 211. The first driving motor 24 is fixedly arranged on the side wall of the mounting ring 2, the first driving motor 24 is vertically arranged, an output shaft of the first driving motor 24 vertically extends upwards, a first driving gear 241 is fixedly arranged at the end part of the output shaft of the first driving motor 24, the first driving gear 241 is horizontally arranged, and the first driving gear 241 is meshed with the first driving gear 212.

The output shaft of the first driving motor 24 rotates to drive the first driving gear 241 to rotate so as to drive the driving toothed ring 21 to rotate, and the external abutting block 23 synchronously slides along the first guide groove 22 in the direction of approaching to each other so as to clamp the pile foundation; or the external abutting blocks 23 synchronously slide along the second guide grooves 42 in the direction away from each other to separate from the pile foundation.

Referring to fig. 3, one end of the outer abutting block 23, which is close to each other, is provided with an arc shape identical to the arc shape of the outer wall of the pile foundation, so that the contact area between the outer abutting block 23 and the pile foundation is increased, and the connection between the outer abutting block 23 and the pile foundation is more stable.

Referring to fig. 1, an elongated support plate 3 is fixedly provided at the top of a base 1, the support plate 3 is vertically disposed and rotatably connected with a mounting plate 31 at the top thereof, the mounting plate 31 is horizontally disposed at the top of the support plate 3, and the mounting plate 31 horizontally rotates around a hinge point. The top pneumatic cylinder 32 has been set firmly to mounting panel 31 bottom, and top pneumatic cylinder 32 vertical setting is at mounting panel 31 top, and the piston rod of top pneumatic cylinder 32 extends vertically downwards. A mounting plate 4 is fixedly arranged at the end of the piston rod of the top hydraulic cylinder 32.

Referring to fig. 4 and 5, the top of the mounting plate 4 is rotatably connected with a driving turntable 41, an archimedes spiral groove two 411 is formed at the bottom side of the driving turntable 41, and a driving tooth two 412 is formed at the side surface of the driving turntable 41. A plurality of second guide grooves 42 are uniformly formed along the circumferential direction of the mounting plate 4, three of which are shown as an example, but not limited to three. The length direction of the second guide groove 42 extends along the radial direction of the driving turntable 41, an inner abutting block 43 is slidably connected in the second guide groove 42, and the inner abutting block 43 slides along the length direction of the second guide groove 42.

Referring to fig. 5, two opposite side surfaces of the inner abutting block 43 are recessed to form a second groove 431, and two opposite side surfaces of the second guide groove 42 are fixedly provided with a second slider 421, and the second slider 421 slides along the length direction of the second groove 431. The second slide block 421 is embedded into the second groove 431, and limits the position of the second inner abutting block 43 in the vertical direction in the process that the second inner abutting block 43 slides along the length direction of the second guide groove 42, so that the second inner abutting block 43 slides at the same height all the time.

Referring to fig. 5, a second tooth 432 is fixedly provided on the top side of the inner abutment 43, and the second tooth 432 is engaged with the second archimedes spiral groove 411. The side wall of the mounting plate 4 is fixedly provided with a second driving motor 44, the second driving motor 44 is vertically arranged, a piston rod of the second driving motor 44 vertically extends upwards, the end part of the piston rod of the second driving motor 44 is fixedly provided with a second driving gear 441, the second driving gear 441 is horizontally arranged, and the second driving gear 441 is meshed with the second driving gear 412.

The output shaft of the second driving motor 44 rotates to drive the second driving gear 441 to rotate so as to drive the driving turntable 41 to rotate, and the inner abutting block 43 synchronously slides along the second guiding groove 42 in a direction away from each other so as to tightly prop up the pile foundation from the inside of the pile foundation; or the inner abutting blocks 43 synchronously slide along the second guide grooves 42 in the directions approaching to each other and are separated from the inner wall of the pile foundation.

The implementation principle of the auxiliary structure for removing pile foundations in the range of the shield tunnel provided by the embodiment of the application is as follows:

When pile pulling is performed, the outer abutting blocks 23 are firstly moved towards the center of the mounting ring 2 along the radial direction of the mounting ring 2, so that the end parts of the outer abutting blocks 23 abut against the outer wall of the pile foundation to clamp the pile foundation from the outside. Simultaneously, the piston rod of the top hydraulic cylinder 32 is extended, the mounting plate 4 is driven to vertically move to the same height position as the mounting plate 4, and the inner abutting block 43 moves towards the center of the mounting plate 4 along the radial direction of the mounting plate 4, so that the end part of the inner abutting block 43 abuts against the inner wall of the pile foundation to tightly abut against the pile foundation from the inside.

The inner abutting block 43 and the outer abutting block 23 clamp the inner part and the outer part of the pile foundation together, so that the connection between the pile foundation and the auxiliary structure is more stable, and the pile foundation is convenient to pull upwards.

After propping, the pile foundation is pulled up under the drive of the bottom hydraulic cylinder 11 and the top hydraulic cylinder 32, and in the pulling process, the mounting ring 2 can return to a position closer to the soil layer for a plurality of times under the drive of the bottom hydraulic cylinder 11, so that the pile foundation can be pulled up conveniently; the inner abutting block 43 always abuts against the inner wall of the pile foundation, so that the pile foundation is kept at a certain height and does not fall off when the outer abutting block 23 moves downwards away from the outer wall of the pile foundation.

Above-mentioned pile pulling in-process, inside supports tight piece 43 has replaced hoist device's effect at traditional pile pulling in-process to utilize pile foundation structure, need not the manual work and be connected it with the pile foundation, save the work wherein with hoist device and pile foundation connection, reduce staff's working strength, and practice thrift operating time, improve the efficiency of whole pile pulling process.

After the pile foundation is completely separated from the soil layer, the outer abutting block 23 is made to continuously clamp the pile foundation, and the inner abutting block 43 is separated from the inner wall of the pile foundation, vertically moves to the bottom end of the pile foundation and abuts against the inner wall of the bottom of the pile foundation. Thereafter, the outer abutment 23 is disengaged from the pile foundation outer wall, and the piston rod of the bottom hydraulic cylinder 11 and the piston rod of the top hydraulic cylinder 32 are retracted. The mounting plate 31 is rotated 180 degrees around the support plate 3 to disengage the inner abutment 43 from the inner wall of the pile foundation.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. An auxiliary structure for removing pile foundation in shield tunnel range, which is characterized in that: comprising the following steps:

the bottom hydraulic cylinder (11) is vertically arranged, and a piston rod of the bottom hydraulic cylinder (11) vertically extends upwards;

The mounting ring (2) is fixedly connected with a piston rod of the bottom hydraulic cylinder (11), external abutting blocks (23) are uniformly arranged along the circumferential direction of the mounting ring (2), the external abutting blocks (23) slide along the radial direction of the mounting ring (2), and the external abutting blocks (23) move in opposite directions to abut against the outer wall of the pile foundation so as to clamp the pile foundation from the outside;

The top hydraulic cylinder (32) is vertically arranged above the bottom hydraulic cylinder (11), and a piston rod of the top hydraulic cylinder (32) vertically extends downwards;

The mounting disc (4) is fixedly connected with a piston rod of the top hydraulic cylinder (32), inner abutting blocks (43) are uniformly arranged along the circumferential direction of the mounting disc (4), the inner abutting blocks (43) slide along the radial direction of the mounting disc (4), and the inner abutting blocks (43) move in opposite directions to abut against the inner wall of the pile foundation so as to tightly abut against the pile foundation from the inside;

The supporting plate (3) is vertically arranged, the top of the supporting plate is rotationally connected with the mounting plate (31), and the cylinder body of the top hydraulic cylinder (32) is fixedly connected to the bottom of the mounting plate (31).

2. The auxiliary structure for pile foundation cleaning in a shield tunnel according to claim 1, wherein:

the mounting ring (2) is rotationally connected with a driving toothed ring (21), an Archimedes spiral groove I (211) is formed in the bottom side of the driving toothed ring (21), a tooth part I (232) is formed in the side surface of the external abutting block (23) corresponding to the driving toothed ring (21), and the tooth part I (232) is meshed with the Archimedes spiral groove I (211);

The mounting ring (2) is provided with a first guide groove (22) corresponding to the movement direction of the external abutting block (23), and the external abutting block (23) slides along the length direction of the first guide groove (22).

3. The auxiliary structure for pile foundation cleaning in a shield tunnel according to claim 2, wherein:

The outer wall of the driving toothed ring (21) is provided with a first driving tooth (212), and the first driving tooth (212) is meshed with a first driving gear (241);

the mounting ring (2) is fixedly provided with a first driving motor (24), and an output shaft of the first driving motor (24) is fixedly connected to the middle of a first driving gear (241).

4. The auxiliary structure for pile foundation cleaning in a shield tunnel according to claim 1, wherein:

The mounting plate (4) is rotationally connected with a driving turntable (41), an Archimedes spiral groove II (411) is formed in the bottom side of the driving turntable (41), a tooth part II (432) is formed in the inner abutting block (43) corresponding to the side surface of the driving turntable (41), and the tooth part II (432) is meshed with the Archimedes spiral groove II (411);

The mounting plate (4) is provided with a second guide groove (42) corresponding to the movement direction of the inner abutting block (43), and the inner abutting block (43) slides along the length direction of the second guide groove (42).

5. The auxiliary structure for pile foundation cleaning in a shield tunnel according to claim 4, wherein:

The outer wall of the driving turntable (41) is provided with a second driving tooth (412), and the second driving tooth (412) is meshed with a second driving gear (441);

The mounting plate (4) is fixedly provided with a second driving motor (44), and an output shaft of the second driving motor (44) is fixedly connected to the middle part of the second driving gear (441).

6. The auxiliary structure for pile foundation cleaning in a shield tunnel according to claim 1, wherein:

The end part of the external abutting block (23) is arranged into an arc shape matched with the outer wall of the pile foundation.

7. The auxiliary structure for pile foundation cleaning in a shield tunnel according to claim 2, wherein:

The two opposite sides of the external abutting block (23) are inwards recessed to form a first groove (231), a first sliding block (221) matched with the first groove (231) is fixedly arranged on the inner wall of the first guide groove (22), and the first sliding block (221) slides along the length direction of the first groove (231).

8. The auxiliary structure for pile foundation cleaning in a shield tunnel according to claim 4, wherein:

The two opposite sides of the inner abutting block (43) are inwards recessed to form a second groove (431), a second sliding block (421) matched with the first groove (231) is fixedly arranged on the inner wall of the second guide groove (42), and the second sliding block (421) slides along the length direction of the second groove (431).