Pile pulling equipment for steel sheet pile and pile pulling method thereof

Abstract

The invention discloses pile pulling equipment for a steel sheet pile and a pile pulling method of the pile pulling equipment, and relates to the technical field of building construction, the pile pulling equipment comprises a connector, the pile pulling equipment further comprises a mounting plate, the top of the mounting plate is fixedly mounted at the bottom of the connector, and four sliding rods are connected to the mounting plate in a sliding mode; the top of the clamping seat and the bottom ends of four sliding rods are fixedly installed, the four sliding rods are each sleeved with a first spring, the bottom ends of the four first springs are all fixedly installed at the top of the clamping seat, and the top ends of the four first springs are all fixedly installed at the bottom of the installation plate; the vibration assembly is arranged at the bottom of the mounting plate and matched with the top of the clamping seat, pile pulling and vibration knocking of the steel sheet pile are integrated through a simple structure, knocking vibration can be conducted on the steel sheet pile while pile pulling is conducted, the pile pulling efficiency and effect of the steel sheet pile are improved, and the pile pulling efficiency of the steel sheet pile is improved. Meanwhile, cost is reduced, operation is convenient, and practicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a steel sheet pile pulling device and a pile pulling method thereof. Background Art

[0002] Steel sheet piles are a common protective structure used in civil engineering projects, primarily for supporting or isolating soil to prevent soil erosion and water loss, or as part of water conservancy, port, and infrastructure projects. Steel sheet piles are typically made of steel and possess strong bending strength and corrosion resistance, making them suitable for use in humid environments such as oceans and rivers. A steel sheet pile puller is a mechanical device specifically designed to remove steel sheet piles that have been driven into the ground. After construction is completed or when demolition is required, a pile puller is required to remove the steel sheet piles from the ground.

[0003] In existing technology, when using a pile puller, a vibratory hammer is typically used to first vibrate the sheet pile's locking joint to reduce soil resistance, then the pile is pulled closer while vibrating. For difficult-to-pull sheet piles, a diesel hammer can be used to first vibrate the pile down 100-300 mm, followed by alternating vibration and extraction with the vibratory hammer. To ensure timely backfilling of the soil hole after the pile is pulled, the hydraulic gripper is used to pull the steel sheet pile slightly above the foundation floor (e.g., 500 mm). The extraction process is then paused, and the vibratory hammer is used to vibrate for a few minutes to partially fill the soil hole as much as possible. The crane should be gradually loaded as the vibratory hammer is activated, and the lifting force is generally slightly less than the compression limit of the shock absorber spring.

[0004] However, when pulling out piles, multiple devices need to be used in conjunction with each other through the use of hydraulic clamps, diesel hammers and vibratory hammers, which not only occupies the construction site, but also has high construction costs and low efficiency, and cannot meet construction needs. For this reason, we propose a steel sheet pile pulling equipment and a pile pulling method to solve the above problems. Summary of the Invention

[0005] The purpose of the present application is to provide a steel sheet pile pulling device and a pile pulling method thereof, so as to solve the problem proposed in the above-mentioned background technology that when pulling out piles, a hydraulic clamp, a diesel hammer and a vibratory hammer are used in coordination with each other, which not only occupies the construction site, but also has high construction costs, low efficiency and cannot meet construction needs.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a pile pulling device for steel sheet piles, comprising a connecting head, and the pile pulling device further comprising: A mounting plate, the top of which is fixedly mounted on the bottom of the connector, and four sliding rods are slidably connected to the mounting plate; A clamping seat, wherein the top of the clamping seat is fixedly mounted on the bottom ends of the four slide rods, the four slide rods are each sleeved with a first spring, the bottom ends of the four first springs are each fixedly mounted on the top of the clamping seat, and the top ends of the four first springs are each fixedly mounted on the bottom of the mounting plate; A vibration assembly, the vibration assembly is arranged at the bottom of the mounting plate, and the vibration assembly is matched with the top of the clamping seat; A clamping assembly, the clamping assembly includes: a rectangular rod, three rectangular rings, three connecting rods, a cross plate, two hydraulic cylinders, two clamping plates and two second springs. The left end and the right end of the rectangular rod are respectively fixedly installed on the inner wall of the clamping seat. The three rectangular rings are all slidably sleeved on the rectangular rod. The top ends of the connecting rods are fixedly installed at the bottoms of the corresponding rectangular rings. The bottom ends of the three connecting rods are all fixedly installed on the top of the cross plate. The top ends of the two clamping plates penetrate through the cross plate and are rotatably connected to the cross plate. The top ends of the hydraulic cylinders are rotatably connected to the corresponding connecting rods. The bottom ends of the hydraulic cylinders penetrate through the cross plate and are rotatably connected to the corresponding clamping plates. The two second springs are both sleeved on the rectangular rod. The mutually remote ends of the two second springs are respectively fixedly installed on the left inner wall and the right inner wall of the clamping seat. The mutually close ends of the two second springs are respectively fixedly installed on the left rectangular ring and the right rectangular ring.

[0007] With the above structure, it is installed and fixed to the lifting arm of the crane through the connector. At this time, the entire pile pulling device is driven by the lifting arm of the crane to move to the top position of the steel sheet pile, and then the top of the steel sheet pile is located between the two clamping plates. At this time, starting the two hydraulic cylinders can drive the two clamping plates to rotate, so that the top of the steel sheet pile can be clamped and fixed by the clamping plates. When the pile pulling device is fixed to the steel sheet pile, the pile pulling operation of the steel sheet pile can be realized by the lifting of the lifting arm of the crane.

[0008] Preferably, the vibration assembly includes two motors, two discs, two sliding shafts, two stabilizing rods, a lifting plate and four vibrating rods. The two motors are both fixedly installed at the bottom of the mounting plate. The mutually remote sides of the two discs are respectively fixedly installed on the output shafts of the two motors. The mutually remote ends of the two sliding shafts are respectively fixedly installed on the mutually close sides of the two discs. The top ends of the two stabilizing rods are both fixedly installed at the bottom of the mounting plate. The lifting plate is respectively slidably sleeved on the two stabilizing rods. Limiting grooves are respectively opened on the left side and the right side of the lifting plate. The mutually close ends of the two sliding shafts respectively extend into the two limiting grooves and are slidably connected to the inner walls of the limiting grooves. The top ends of the four vibrating rods are all fixedly installed at the bottom of the lifting plate. The bottom ends of the four vibrating rods are all matched with the top of the clamping seat.

[0009] Further, by starting two motors, the two discs can be driven to rotate. At this time, the two discs can drive the sliding shafts to rotate. When the two sliding shafts rotate, through the reciprocating sliding and limiting cooperation between the sliding shafts and the two limiting grooves, the lifting plate can be driven to move up and down reciprocally. When the lifting plate moves up and down, the four vibrating rods can be driven to move up and down reciprocally. At this time, the clamping seat can be knocked and vibrated through the vibrating rods. In this way, when the pile-pulling equipment pulls the steel sheet pile, the locking mouth between adjacent steel sheet piles can be vibrated alive to reduce the soil resistance, and then while vibrating and gathering, at the same time, for the steel sheet pile that is difficult to pull out, it can be vibrated down by 100 - 300 mm first, and then pulled upward. Through the reciprocating vibrating and pulling method, the steel sheet pile can be loosened, which is convenient for the pile-pulling operation of the steel sheet pile.

[0010] Preferably, bearings are fixedly sleeved on the output shafts of the two motors, and the tops of the two bearings are fixedly installed at the bottom of the mounting plate.

[0011] Further, by setting the bearings, the output shaft of the motor and the disc can be stably rotationally supported.

[0012] Preferably, third springs are sleeved on the two stabilizing rods, the tops of the two third springs are fixedly installed at the bottom of the lifting plate, and the bottoms of the third springs are fixedly installed on the corresponding stabilizing rods.

[0013] Further, by setting the third springs, the lifting plate can be assisted to reset up and down.

[0014] Preferably, four matching blocks are fixedly installed at the top of the clamping seat, and the bottom ends of the vibrating rods are matched with the tops of the corresponding matching blocks.

[0015] Further, by setting the matching blocks, it is convenient for the vibrating rods to knock and vibrate with the clamping seat.

[0016] Preferably, two mounting holes are opened on the cross plate, the top end of the clamping plate passes through the corresponding mounting hole and is rotatably connected to the inner wall of the mounting hole, and the bottom end of the hydraulic cylinder passes through the corresponding mounting hole and is matched with the mounting hole.

[0017] Further, by opening the mounting holes, it is convenient to install the clamping plate and the hydraulic cylinder, and at the same time, it is convenient for the clamping plate and the hydraulic cylinder to move.

[0018] Preferably, anti-slip plates are fixedly installed on the sides of the two clamping plates close to each other, and the two anti-slip plates are matched with each other.

[0019] Further, by setting the anti-slip plates, the clamping stability of the clamping plate on the steel sheet pile can be improved, and the steel sheet pile can be prevented from falling off during pile pulling.

[0020] Preferably, a chute is provided on the inner wall of the top of the clamping seat. Sliders are fixedly installed on the tops of the three rectangular rings, and the tops of the three sliders are slidably connected in the chute.

[0021] Furthermore, through the sliding limit cooperation between the slider and the chute, stable sliding limit and sliding support can be provided for the rectangular ring, and the strength of the rectangular rod can be improved.

[0022] The present invention also proposes a pile pulling method for a steel sheet pile pulling device, including the following steps: S1: First, connect the hydraulic cylinders and the motors to an external power source, and then install and fix them to the lifting arm of the crane through the connector. At this time, drive the entire pile pulling device to move to the top position of the steel sheet pile through the lifting arm of the crane, and then make the top of the steel sheet pile located between the two clamping plates. S2: Then start the two hydraulic cylinders to drive the two clamping plates to rotate, so as to clamp and fix the top of the steel sheet pile through the clamping plates. S3: Then start the two motors and drive the four vibrating rods to move up and down reciprocally through the transmission cooperation between the motors and the four vibrating rods. At this time, the clamping seat can be knocked and vibrated through the vibrating rods. S4: Secondly, the lock openings between adjacent steel sheet piles can be vibrated to loosen the soil resistance by the vibration knocking method, and then gather while vibrating. At the same time, for the steel sheet piles that are difficult to pull out, the steel sheet piles can be vibrated down by 100 - 300 mm first, and then pulled upward. The steel sheet piles can be loosened by the reciprocating vibration and pulling method, which is convenient for the pile pulling operation of the steel sheet piles. S5: Finally, the pile pulling operation of the steel sheet pile can be realized by the lifting of the lifting arm of the crane.

[0023] The beneficial effects of the present invention are as follows: 1. Install and fix it to the lifting arm of the crane through the connector. At this time, drive the entire pile pulling device to move to the top position of the steel sheet pile through the lifting arm of the crane, and then make the top of the steel sheet pile located between the two clamping plates. At this time, start the two hydraulic cylinders to drive the two clamping plates to rotate, so as to clamp and fix the top of the steel sheet pile through the clamping plates. After the pile pulling device is fixed to the steel sheet pile, the pile pulling operation of the steel sheet pile can be realized by the lifting of the lifting arm of the crane. 2. By starting two motors, two discs can be driven to rotate. At this time, the two discs can drive the sliding shafts to rotate. When the two sliding shafts rotate, through the reciprocating sliding and limiting cooperation between the sliding shafts and the two limiting grooves, the lifting plate can be driven to move up and down reciprocally. When the lifting plate moves up and down, four vibrating rods can be driven to move up and down reciprocally. At this time, the clamping seat can be knocked and vibrated through the vibrating rods. In this way, when the pile pulling equipment pulls the steel sheet pile, the locking mouth between adjacent steel sheet piles can be vibrated alive to reduce the soil resistance, and then while vibrating and gathering, for the steel sheet pile that is difficult to pull out, it can be vibrated down by 100 - 300 mm first through vibration, and then pulled upward. Through the reciprocating vibration and pulling method, the steel sheet pile is loosened, which is convenient for the pile pulling operation of the steel sheet pile; The present invention realizes the integrated setting of pile pulling and vibration knocking of steel sheet piles through a simple structure, can knock and vibrate the steel sheet piles while pulling the piles, improves the pile pulling efficiency and effect of the steel sheet piles, reduces the cost at the same time, is convenient to operate, and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the main structural view of the embodiment of the present application; Figure 2 is the main structural cross-sectional view of the connector, mounting plate, sliding rod, first spring, motor, disc, sliding shaft, bearing, stabilizing rod, lifting plate, third spring and vibrating rod of the embodiment of the present application; Figure 3 is the main structural cross-sectional view of the clamping seat, rectangular rod, rectangular ring, connecting rod, cross plate, hydraulic cylinder, mounting hole, clamping plate, anti-slip plate, second spring, slider, chute and mating block of the embodiment of the present application; Figure 4 is the three-dimensional view of the clamping seat and the mating block of the embodiment of the present application; Figure 5 is the three-dimensional view of the motor, disc, sliding shaft, stabilizing rod, lifting plate, limiting groove, third spring and vibrating rod of the embodiment of the present application.

[0025] In the figure: 1. Connector; 2. Mounting plate; 3. Sliding rod; 4. Clamping seat; 5. First spring; 6. Rectangular rod; 7. Rectangular ring; 8. Connecting rod; 9. Cross plate; 10. Hydraulic cylinder; 11. Mounting hole; 12. Clamping plate; 13. Anti-slip plate; 14. Second spring; 15. Slider; 16. Chute; 17. Mating block; 18. Motor; 19. Disc; 20. Sliding shaft; 21. Bearing; 22. Stabilizing rod; 23. Lifting plate; 24. Limiting groove; 25. Third spring; 26. Vibrating rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be further explained below with reference to specific embodiments.

[0027] Reference Figures 1 - 5 , in this embodiment, a pile pulling device for steel sheet piles is proposed, including a connecting head 1. The pile pulling device further includes: A mounting plate 2, the top of the mounting plate 2 is fixedly installed at the bottom of the connecting head 1, and four sliding rods 3 are slidably connected to the mounting plate 2; Clamping seats 4, the tops of the clamping seats 4 are respectively fixedly installed at the bottoms of the four sliding rods 3. A first spring 5 is sleeved on each of the four sliding rods 3. The bottoms of the four first springs 5 are fixedly installed at the tops of the clamping seats 4, and the tops of the four first springs 5 are fixedly installed at the bottom of the mounting plate 2; A vibration assembly, the vibration assembly is arranged at the bottom of the mounting plate 2, and the vibration assembly cooperates with the top of the clamping seat 4; A clamping assembly, the clamping assembly includes: a rectangular rod 6, three rectangular rings 7, three connecting rods 8, a cross plate 9, two hydraulic cylinders 10, two clamping plates 12 and two second springs 14. The left end and the right end of the rectangular rod 6 are respectively fixedly installed on the inner walls of the clamping seat 4. The three rectangular rings 7 are all slidably sleeved on the rectangular rod 6. The top of the connecting rod 8 is fixedly installed at the bottom of the corresponding rectangular ring 7. The bottoms of the three connecting rods 8 are all fixedly installed on the top of the cross plate 9. The tops of the two clamping plates 12 penetrate through the cross plate 9 and are rotatably connected to the cross plate 9. The top of the hydraulic cylinder 10 is rotatably connected to the corresponding connecting rod 8. The bottom of the hydraulic cylinder 10 penetrates through the cross plate 9 and is rotatably connected to the corresponding clamping plate 12. The two second springs 14 are both sleeved on the rectangular rod 6. The mutually remote ends of the two second springs 14 are respectively fixedly installed on the left inner wall and the right inner wall of the clamping seat 4. The mutually close ends of the two second springs 14 are respectively fixedly installed on the left rectangular ring 7 and the right rectangular ring 7.

[0028] With the above structure, it is installed and fixed to the lifting arm of the crane through the connecting head 1. At this time, the entire pile pulling device is driven by the lifting arm of the crane to move to the top position of the steel sheet pile, and then the top of the steel sheet pile is located between the two clamping plates 12. At this time, starting the two hydraulic cylinders 10 can drive the two clamping plates 12 to rotate, so that the top of the steel sheet pile can be clamped and fixed by the clamping plates 12. When the pile pulling device is fixed to the steel sheet pile, the pile pulling operation of the steel sheet pile can be realized by the lifting and lowering of the lifting arm of the crane.

[0029] In this embodiment, the vibration assembly includes two motors 18, two discs 19, two sliding shafts 20, two stabilizing rods 22, a lifting plate 23 and four vibrating rods 26. The two motors 18 are both fixedly installed at the bottom of the mounting plate 2. One side of each of the two discs 19 away from each other is fixedly installed on the output shafts of the two motors 18 respectively. One end of each of the two sliding shafts 20 away from each other is fixedly installed on one side of each of the two discs 19 close to each other. The top ends of the two stabilizing rods 22 are both fixedly installed at the bottom of the mounting plate 2. The lifting plate 23 is respectively sleeved on the two stabilizing rods 22 in a sliding manner. Limiting grooves 24 are respectively formed on the left side and the right side of the lifting plate 23. One end of each of the two sliding shafts 20 close to each other extends into the two limiting grooves 24 respectively and is slidably connected with the inner wall of the limiting groove 24. The top ends of the four vibrating rods 26 are all fixedly installed at the bottom of the lifting plate 23. The bottom ends of the four vibrating rods 26 are all matched with the top of the clamping seat 4. By starting the two motors 18, the two discs 19 can be driven to rotate. At this time, the two discs 19 can drive the sliding shafts 20 to rotate. When the two sliding shafts 20 rotate, through the reciprocating sliding and limiting cooperation between the sliding shafts 20 and the two limiting grooves 24, the lifting plate 23 can be driven to move up and down reciprocally. When the lifting plate 23 moves up and down, the four vibrating rods 26 can be driven to move up and down reciprocally. At this time, the clamping seat 4 can be knocked and vibrated through the vibrating rods 26. In this way, when the pile extraction device extracts the steel sheet pile, the locking mouths between adjacent steel sheet piles can be vibrated to reduce the resistance of the soil, and then while vibrating and gathering, for the steel sheet pile that is difficult to extract, it can be vibrated down by 100 - 300 mm first through vibration, and then pulled upward. Through the reciprocating vibration and extraction method, the steel sheet pile can be loosened, which is convenient for the pile extraction operation of the steel sheet pile.

[0030] In this embodiment, bearing sleeves 21 are fixedly sleeved on the output shafts of the two motors 18. The top ends of the two bearing sleeves 21 are both fixedly installed at the bottom of the mounting plate 2. By providing the bearing sleeves 21, stable rotational support can be provided for the output shafts of the motors 18 and the discs 19.

[0031] In this embodiment, third springs 25 are sleeved on the two stabilizing rods 22. The top ends of the two third springs 25 are both fixedly installed at the bottom of the lifting plate 23. The bottom ends of the third springs 25 are fixedly installed on the corresponding stabilizing rods 22. By providing the third springs 25, the lifting plate 23 can be assisted to reset up and down.

[0032] In this embodiment, four matching blocks 17 are fixedly installed on the top of the clamping seat 4. The bottom ends of the vibrating rods 26 are matched with the tops of the corresponding matching blocks 17. By providing the matching blocks 17, it is convenient for the vibrating rods 26 to knock and vibrate with the clamping seat 4.

[0033] In this embodiment, two mounting holes 11 are formed in the horizontal plate 9. The top end of the clamping plate 12 penetrates through the corresponding mounting hole 11 and is rotatably connected to the inner wall of the mounting hole 11. The bottom end of the hydraulic cylinder 10 penetrates through the corresponding mounting hole 11 and is matched with the mounting hole 11. By providing the mounting holes 11, it is convenient to install the clamping plate 12 and the hydraulic cylinder 10, and at the same time, it is convenient for the clamping plate 12 and the hydraulic cylinder 10 to move.

[0034] In this embodiment, anti-slip plates 13 are fixedly installed on one side of the two clamping plates 12 close to each other, and the two anti-slip plates 13 are matched with each other. By providing the anti-slip plates 13, the stability of the clamping of the steel sheet pile by the clamping plate 12 can be improved, and the steel sheet pile can be prevented from falling off during pile extraction.

[0035] In this embodiment, a sliding groove 16 is formed in the inner wall of the top of the clamping seat 4. The tops of the three rectangular rings 7 are fixedly installed with sliding blocks 15, and the tops of the three sliding blocks 15 are slidably connected in the sliding groove 16. Through the sliding limit cooperation between the sliding block 15 and the sliding groove 16, the rectangular ring 7 can be stably slidably limited and slidably supported, and the strength of the rectangular rod 6 can be improved.

[0036] The present invention also proposes a pile extraction method for a pile extraction device of a steel sheet pile, including the following steps: S1: First, connect the hydraulic cylinder 10 and the motor 18 to an external power source, and then install and fix them to the lifting arm of the crane through the connecting head 1. At this time, drive the entire pile extraction device to move to the top position of the steel sheet pile through the lifting arm of the crane, and then make the top of the steel sheet pile located between the two clamping plates 12; S2: Then start the two hydraulic cylinders 10 to drive the two clamping plates 12 to rotate, so that the top of the steel sheet pile can be clamped and fixed by the clamping plates 12; S3: Then start the two motors 18 and drive the four vibrating rods 26 to perform reciprocating up and down movements through the transmission cooperation between the motor 18 and the four vibrating rods 26. At this time, the clamping seat 4 can be knocked and vibrated through the vibrating rods 26; S4: Secondly, the lock mouth between adjacent steel sheet piles can be vibrated to reduce the soil resistance by the way of vibration knocking, and then while vibrating, gather them together. At the same time, for the steel sheet piles that are difficult to extract, the steel sheet piles can be vibrated down by 100 - 300 mm first, and then pulled upward. By the way of reciprocating vibration and extraction, the steel sheet piles can be loosened, which is convenient for the pile extraction operation of the steel sheet piles; S5: Finally, the pile extraction operation of the steel sheet pile can be realized by the lifting of the lifting arm of the crane.

[0037] It should be noted that: specifically, what models of the hydraulic cylinder 10 and the motor 18 are used are selected by those skilled in the relevant art. And the above-mentioned hydraulic cylinder 10 and motor 18 both belong to the prior art, and this solution will not be elaborated.

[0038] Working principle: When in use, first connect the hydraulic cylinders 10 and the motor 18 to an external power supply, and then fix them to the crane lifting arm through the connector 1. At this time, drive the entire pile extraction equipment to move to the top position of the steel sheet pile through the crane lifting arm, and then place the top of the steel sheet pile between the two clamping plates 12. At this time, starting the two hydraulic cylinders 10 can drive the two clamping plates 12 to rotate, so that the top of the steel sheet pile can be clamped and fixed by the clamping plates 12. After the pile extraction equipment is fixed to the steel sheet pile, the pile extraction operation of the steel sheet pile can be realized by the lifting of the crane lifting arm. Here, during the process of extracting the steel sheet pile, starting the two motors 18 can drive the two discs 19 to rotate. At this time, the two discs 19 drive the sliding shaft 20 to rotate. When the two sliding shafts 20 rotate, through the reciprocating sliding limit cooperation between the sliding shafts 20 and the two limit grooves 24, the lifting plate 23 can be driven to move up and down reciprocally. When the lifting plate 23 moves up and down, it can drive the four vibrating rods 26 to move up and down reciprocally. At this time, the clamping seat 4 can be knocked and vibrated by the vibrating rods 26. In this way, when the pile extraction equipment extracts the steel sheet pile, the locking mouths between adjacent steel sheet piles can be vibrated alive to reduce the soil resistance, and then vibrate and gather at the same time. For the steel sheet pile that is difficult to extract, it can be vibrated down by 100 - 300 mm first, and then pulled upward. The steel sheet pile is loosened by the reciprocating vibration and extraction method, which is convenient for the pile extraction operation of the steel sheet pile.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pile-pulling device for steel sheet piles, characterized in that, Comprising: Connector (1); Mounting plate (2), the top of the mounting plate (2) is fixedly mounted at the bottom of the connector (1), and four sliding rods (3) are slidably connected to the mounting plate (2); Clamping seat (4), the top of the clamping seat (4) is fixedly mounted to the bottom ends of the four sliding rods (3) respectively. First springs (5) are sleeved on the four sliding rods (3), the bottom ends of the four first springs (5) are fixedly mounted on the top of the clamping seat (4), and the top ends of the four first springs (5) are fixedly mounted on the bottom of the mounting plate (2); Vibration assembly, the vibration assembly is arranged at the bottom of the mounting plate (2), and the vibration assembly cooperates with the top of the clamping seat (4); Clamping assembly, the clamping assembly includes: rectangular rod (6), three rectangular rings (7), three connecting rods (8), cross plate (9), two hydraulic cylinders (10), two clamping plates (12) and two second springs (14). The left end and the right end of the rectangular rod (6) are fixedly mounted on the inner walls of the clamping seat (4) respectively. The three rectangular rings (7) are all slidably sleeved on the rectangular rod (6). The top end of the connecting rod (8) is fixedly mounted on the bottom of the corresponding rectangular ring (7). The bottom ends of the three connecting rods (8) are all fixedly mounted on the top of the cross plate (9). The top ends of the two clamping plates (12) penetrate through the cross plate (9) and are rotatably connected to the cross plate (9). The top end of the hydraulic cylinder (10) is rotatably connected to the corresponding connecting rod (8). The bottom end of the hydraulic cylinder (10) penetrates through the cross plate (9) and is rotatably connected to the corresponding clamping plate (12). The two second springs (14) are both sleeved on the rectangular rod (6). The mutually remote ends of the two second springs (14) are fixedly mounted on the left inner wall and the right inner wall of the clamping seat (4) respectively. The mutually close ends of the two second springs (14) are fixedly mounted on the left rectangular ring (7) and the right rectangular ring (7) respectively.

2. The pile extraction device for a steel sheet pile according to claim 1, characterized in that, The vibration assembly includes two motors (18), two discs (19), two sliding shafts (20), two stabilizing rods (22), a lifting plate (23) and four vibrating rods (26). The two motors (18) are both fixedly mounted at the bottom of the mounting plate (2). The mutually remote sides of the two discs (19) are fixedly mounted on the output shafts of the two motors (18) respectively. The mutually remote ends of the two sliding shafts (20) are fixedly mounted on the mutually close sides of the two discs (19) respectively. The top ends of the two stabilizing rods (22) are fixedly mounted at the bottom of the mounting plate (2). The lifting plate (23) is slidably sleeved on the two stabilizing rods (22) respectively. Limiting grooves (24) are formed in the left side and the right side of the lifting plate (23). The mutually close ends of the two sliding shafts (20) extend into the two limiting grooves (24) respectively and are slidably connected to the inner walls of the limiting grooves (24). The top ends of the four vibrating rods (26) are fixedly mounted at the bottom of the lifting plate (23). The bottom ends of the four vibrating rods (26) cooperate with the top of the clamping seat (4).

3. The pile pulling device for steel sheet piles according to claim 2, characterized in that, Bearings (21) are fixedly sleeved on the output shafts of the two motors (18), and the tops of the two bearings (21) are fixedly mounted at the bottom of the mounting plate (2).

4. The pile extraction device for steel sheet piles according to claim 2, characterized in that, A third spring (25) is sleeved on each of the two stabilizing rods (22). The top ends of the two third springs (25) are fixedly installed at the bottom of the lifting plate (23), and the bottom ends of the third springs (25) are fixedly installed on the corresponding stabilizing rods (22).

5. The pile pulling device for steel sheet piles according to claim 2, characterized in that, Four mating blocks (17) are fixedly installed at the top of the clamping seat (4), and the bottom end of the vibrating rod (26) is matched with the top of the corresponding mating block (17).

6. The pile extraction device for steel sheet piles according to claim 1, characterized in that, Two mounting holes (11) are formed in the cross plate (9). The top end of the clamping plate (12) passes through the corresponding mounting hole (11) and is rotatably connected to the inner wall of the mounting hole (11), and the bottom end of the hydraulic cylinder (10) passes through the corresponding mounting hole (11) and is matched with the mounting hole (11).

7. The pile extraction device for a steel sheet pile according to claim 1, characterized in that, Anti-slip plates (13) are fixedly installed on one side of each of the two clamping plates (12) close to each other, and the two anti-slip plates (13) are matched with each other.

8. The pile extraction device for steel sheet piles according to claim 1, characterized in that, A chute (16) is formed in the inner wall of the top of the clamping seat (4). Sliders (15) are fixedly installed at the top of the three rectangular rings (7), and the top ends of the three sliders (15) are slidably connected in the chute (16).

9. The pile extraction method of a pile extraction device for steel sheet piles, characterized in that, Including the following steps: S1: First, connect the hydraulic cylinders (10) and the motors (18) to an external power supply, and then install and fix them to the lifting arm of the crane through the connector (1). At this time, drive the entire pile pulling device to move to the top position of the steel sheet pile through the lifting arm of the crane, and then place the top of the steel sheet pile between the two clamping plates (12). S2: Then start the two hydraulic cylinders (10) to drive the two clamping plates (12) to rotate, so as to clamp and fix the top of the steel sheet pile through the clamping plates (12). S3: Then start the two motors (18) and drive the four vibrating rods (26) to move up and down reciprocally through the transmission cooperation between the motors (18) and the four vibrating rods (26). At this time, the clamping seat (4) can be knocked and vibrated through the vibrating rods (26). S4: Secondly, the lock mouth between adjacent steel sheet piles can be vibrated to reduce the soil resistance by vibrating and knocking. Then, while vibrating, move closer. At the same time, for the steel sheet piles that are difficult to pull out, first vibrate the steel sheet piles down by 100 - 300 mm through vibration, and then pull them upward. The steel sheet piles can be loosened by reciprocating vibration and pulling, which is convenient for the pile pulling operation of the steel sheet piles. S5: Finally, the pile pulling operation of the steel sheet pile can be realized by lifting and lowering the lifting arm of the crane.

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