Novel pile pulling clamp device and method

Abstract

The novel pile pulling clamp device comprises a bent steel bar, the outer surface of the bent steel bar is sleeved with an anti-disengaging mechanism, a bearing and hanging mechanism is arranged in the middle of the top end of the bent steel bar, and a steel wire rope is fixedly connected to the top end of the bearing and hanging mechanism. According to the invention, one-time customization is realized without repeated purchase and waste caused by inapplicability; the clamp is more durable, loss is greatly reduced, the danger coefficient of pile pulling construction is high, connection with a hoisted object is serious in the hoisting process, and the clamp effectively improves the construction safety while improving the work efficiency. The customized clamp measure is put forward through observation and analysis, by using the customized clamp, the problems that the clamp is not tight in clamping, prone to deformation and large in safety risk are solved, the unnecessary efficacy loss caused by clamp replacement is solved, the construction efficiency is greatly improved, meanwhile, the customized clamp can be popularized to various construction problems related to clamp using, and the practicability is high. And the requirements of workers are met, and the practicability of the device is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of shield construction, and specifically relates to a new pile pulling fixture device and method. Background Art

[0002] During shield construction, if the shield section needs to pass under buildings such as bridges, it is necessary to pull out the pile foundation that affects the tunneling of the shield section.

[0003] In the existing construction technology for pulling out pile foundations, most of them first twist off the pile foundation, put on a fixture and lift it out with a steel wire rope. During the process of pulling out and transporting the pile body, the pile foundation will vibrate and slip, and the clamping plate is also prone to deformation, posing a safety hazard. At the same time, when facing different main reinforcement diameters of pile foundations, traditional fixtures need to be customized accordingly, which affects the construction progress. The efficiency of the traditional pile pulling construction process needs to be optimized. Summary of the Invention

[0004] To solve the above technical problems, a new pile pulling fixture device and method are provided. The technical solution solves the problems raised in the above background art that during the process of pulling out and transporting the pile body, the pile foundation will vibrate and slip, the clamping plate is also prone to deformation, posing a safety hazard. At the same time, when facing different main reinforcement diameters of pile foundations, traditional fixtures need to be customized accordingly, which affects the construction progress.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A new pile pulling fixture device includes a bent steel bar, on the outer surface of which an anti - detachment mechanism is sleeved. In the middle of the top of the bent steel bar, a hoisting mechanism is arranged, and a steel wire rope is fixedly connected to the top of the hoisting mechanism.

[0006] Preferably, the anti - detachment mechanism includes a thick steel plate, a U - shaped steel plate, bolts and nuts. A number of groups of holes are symmetrically penetrated through the left and right sides of the U - shaped steel plate. The U - shaped steel plate is arranged on the front side of the thick steel plate, and the thick steel plate is fixedly connected to the U - shaped steel plate through a number of groups of bolts and nuts.

[0007] Preferably, the hoisting mechanism includes an installation frame, a threaded rod and a telescopic member. The bottom of the steel wire rope is welded to the middle of the top of the installation frame. The threaded rod is rotatably connected inside the installation frame. The thread directions of the two ends of the threaded rod are opposite, and the two ends of the outer surface of the threaded rod are respectively threadedly connected with a first movable block and a second movable block.

[0008] Preferably, the two sides of the top of the telescopic member are respectively rotatably connected to the first movable block and the second movable block, and the two sides of the bottom of the telescopic member are respectively rotatably connected inside the first sliding block and the second sliding block. The first sliding block and the second sliding block are respectively slidably connected to the two ends of the outer surface of the slide rail.

[0009] Preferably, the bottom end of the slide rail is fixedly connected to the top end of the lifting plate.

[0010] Preferably, a connecting plate is fixedly installed on the outer side of the lifting plate. The outer side of the connecting plate penetrates through the notch formed in the mounting frame and is fixedly connected to the upper clamping member. And a lower clamping member is welded to the bottom end of the front side of the mounting frame.

[0011] Preferably, one end of the threaded rod extends to the outside of the mounting frame and is fixedly connected to the rotating wheel.

[0012] Preferably, a guide rod is fixedly installed at the inner top end of the mounting frame. Both the first movable block and the second movable block are slidably connected to the outer surface of the guide rod.

[0013] Preferably, baffles are fixedly installed on both the left and right sides of the slide rail.

[0014] A using method of a novel pile pulling fixture device includes: During pile pulling construction, first dig out the soil covering the old pile head. After the old pile is twisted off, the steel bars inside the pile are exposed, and the workers bend the steel bars manually. According to the size of the pile foundation steel bars, adjust the lifting mechanism to clamp the middle end of the bent steel bars. Insert the anti - detachment mechanism under the end of the bent steel bar of the pile foundation. Bend the steel bars left and right and insert them into the U - shaped steel plates respectively. Insert the four bolts of the thick steel plate into the four groups of holes. First, tighten the nuts on the two inner bolts. At this time, the two ends of the U - shaped steel plate shrink inward due to the pressure of the bolts, and the bent part of the U - shaped steel plate generates pressure on the contact surface of the pile foundation steel bars. Then, tighten the nuts on the two outer bolts according to the situation. According to the size of the pile foundation, select the corresponding number of pile foundation steel bars. The lifting mechanism fixed to the pile foundation steel bars is connected to the crane through a steel wire rope for pile pulling.

[0015] Compared with the prior art, the present invention provides a novel pile pulling fixture device and method, having the following beneficial effects: The present invention is customized once, without the waste caused by multiple purchases and inapplicability; it is more durable and greatly reduces losses. And during pile pulling construction, the risk coefficient is relatively high, and the connection with the lifted object during the hoisting process is of utmost importance. This fixture improves work efficiency and effectively improves the construction safety at the same time; by observing and analyzing, customized fixture measures are proposed. By using the customized fixture, the problems of the fixture not clamping tightly, being easily deformed, and having a large safety risk are solved, and the unnecessary efficiency loss caused by replacing the fixture is solved, greatly improving the construction efficiency. At the same time, this customized fixture can be popularized to various construction problems involving the use of fixtures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2Is the front view of the present invention; Figure 3 Is the structural schematic diagram of the anti - detachment mechanism in the present invention; Figure 4 Is the structural schematic diagram of the anti - detachment mechanism from another perspective in the present invention; Figure 5 Is the structural schematic diagram of the lifting and suspension mechanism in the present invention; Figure 6 Is the internal structural schematic diagram of the mounting frame in the present invention; Figure 7 In the present invention Figure 5 The enlarged structural schematic diagram of the position A proposed.

[0017] The reference numerals in the figure are: 1. Bent steel bar; 2. Anti - detachment mechanism; 201. Thick steel plate; 202. U - shaped steel plate; 203. Bolt; 204. Nut; 3. Lifting and suspension mechanism; 301. Mounting frame; 302. Threaded rod; 303. Guide rod; 304. First movable block; 305. Second movable block; 306. Runner; 307. Lifting plate; 308. Slide rail; 309. Baffle; 310. First sliding block; 311. Second sliding block; 312. Telescopic member; 313. Upper clamping member; 314. Lower clamping member; 315. Notch; 4. Steel wire rope. Detailed implementation manners

[0018] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0019] Embodiment 1 Please refer to Figures 1-7 As shown, a new type of pile - pulling fixture device includes a bent steel bar 1. An anti - detachment mechanism 2 is sleeved on the outer surface of the bent steel bar 1. A lifting and suspension mechanism 3 is arranged in the middle of the top end of the bent steel bar 1. A steel wire rope 4 is fixedly connected to the top end of the lifting and suspension mechanism 3.

[0020] Please refer to Figures 3-4 As shown, the anti - detachment mechanism 2 includes a thick steel plate 201, a U - shaped steel plate 202, a bolt 203 and a nut 204. A plurality of groups of holes are symmetrically formed through the left and right sides of the U - shaped steel plate 202. The U - shaped steel plate 202 is arranged on the front side of the thick steel plate 201, and the thick steel plate 201 is fixedly connected to the U - shaped steel plate 202 through a plurality of groups of bolts 203 and nuts 204.

[0021] A using method of a new type of pile - pulling fixture device includes: S1. During the pile extraction construction, first grab the soil covering the head of the old pile. After the old pile is twisted off, the steel bars inside the pile are exposed. Manually bend the steel bars (when bending, ensure that there is a small horizontal section at the bending point to ensure uniform force on the contact surface with the fixture; the bent steel bars slightly present an eight-shaped pattern, approximately parallel, and the included angle of the intersecting lines of the two ends of the bent steel bars is less than 20° to facilitate the installation of the anti-disengagement device and uniform force).

[0022] S2. According to the size of the pile foundation steel bars, the hoisting mechanism 3 clamps the middle part of the bent steel bars. If the main steel bars to be extracted from the old pile are of other specifications, the clamping specifications of the hoisting mechanism 3 can be adjusted as appropriate. Generally, take a value 2 - 3 mm larger than the diameter of the main steel bar, so that the steel bars maintain a relatively stable state and uniform force in the hole during the pile extraction and pile hoisting process.

[0023] S3. Anti-disengagement mechanism 2: It consists of a high-strength U-shaped steel plate 202 and a thick steel plate 201 with bolts 203. The size of the U-shaped end of the U-shaped steel plate 202 is determined according to different main steel bars, slightly larger than the diameter of the main steel bar by 2 - 3 mm. Eight holes are drilled on the plate body, corresponding in pairs, forming four groups. The two groups on the left and the two groups on the right are symmetric about the center of the thick steel plate 201. Four high-strength bolts 203 are welded on the plate body of the thick steel plate 201, and the positions correspond one by one to the four groups of holes of the U-shaped steel plate 202. The size of the entire thick steel plate 201 is exactly the same as the unbent middle part of the U-shaped steel plate 202.

[0024] Insert the anti-disengagement mechanism 2 under the end of the bent steel bars of the pile foundation (under the hoisting mechanism 3). Each of the left and right bent steel bars is inserted into the U-shaped end. Insert the four bolts 203 of the thick steel plate 201 into the four groups of holes. Gaskets are provided at both ends of the bolts 203 and at the contact surfaces between the plate body of the thick steel plate 201 and the U-shaped steel plate 202 to enhance the friction force. First, tighten the nuts 204 on the two inner bolts 203. At this time, the two ends of the U-shaped steel plate 202 contract inward due to the pressure of the bolts 203, and the U-shaped bent part generates pressure on the contact surface of the pile foundation steel bars. Then, tighten the nuts 204 on the two outer bolts 203 as appropriate to further strengthen the pressure of the anti-disengagement mechanism 2 on the steel bars.

[0025] S4. According to the size of the pile foundation, select the corresponding number of pile foundation steel bars. The selection principle of the steel bars is: the selected steel bars are evenly distributed to ensure uniform force on the entire pile foundation during pile extraction, and preferably select steel bars with a large diameter.

[0026] The hoisting mechanism 3 fixed to the pile foundation steel bars is connected to the crane through a steel wire rope 4. The connection between the steel wire rope 4 and the hoisting mechanism 3 is strengthened to ensure uniform force.

[0027] The hoisting mechanism 3, the anti - detachment mechanism 2 and the pile foundation bent reinforcement 1 as a whole form a triangular structure. The anti - detachment mechanism 2 stabilizes the shape of the bent reinforcement, ensures the uniform force of the hoisting device during the pile hoisting and pulling process. At the same time, once the force changes during the transportation process, the anti - detachment mechanism 2 can also bear the gravity of the pile. Under the stable operation of the hoisting mechanism 3 during pile hoisting and pulling, it not only plays the role of connecting with the pile driver but also can bear the force of the whole process.

[0028] Embodiment 2 Please refer to Figures 5-7 As shown, the hoisting mechanism 3 includes an installation frame 301, a threaded rod 302 and a telescopic member 312. The bottom of the steel wire rope 4 is welded to the middle of the top end of the installation frame 301. The threaded rod 302 is rotatably connected inside the installation frame 301. The thread directions of the two ends of the threaded rod 302 are opposite. And the two ends of the outer surface of the threaded rod 302 are respectively threadedly connected with a first movable block 304 and a second movable block 305. The two sides of the top end of the telescopic member 312 are respectively rotatably connected with the first movable block 304 and the second movable block 305. And the two sides of the bottom end of the telescopic member 312 are respectively rotatably connected inside the first sliding block 310 and the second sliding block 311. The first sliding block 310 and the second sliding block 311 are respectively slidably connected to the two ends of the outer surface of the slide rail 308. The bottom end of the slide rail 308 is fixedly connected to the top end of the lifting plate 307. A connecting plate is fixedly installed on the outside of the lifting plate 307. The outside of the connecting plate penetrates through the notch 315 opened on the installation frame 301 and is fixedly connected with the upper clamping member 313. And the bottom end of the front side of the installation frame 301 is welded with a lower clamping member 314. One end of the threaded rod 302 extends to the outside of the installation frame 301 and is fixedly connected with the runner 306. A guide rod 303 is fixedly installed at the top end inside the installation frame 301. Both the first movable block 304 and the second movable block 305 are slidably connected to the outer surface of the guide rod 303. Baffles 309 are fixedly installed on both the left and right sides of the slide rail 308.

[0029] In this solution, the hoisting mechanism 3 is adjustable. If the main reinforcement of the old pile to be pulled out is of other specifications, the clamping specifications of the hoisting mechanism 3 can be adjusted according to the situation. The specific adjustment steps are as follows: By rotating the runner 306, the threaded rod 302 rotates, and then the first movable block 304 and the second movable block 305 approach or move away from each other. When approaching, the telescopic member 312 is in a stretched state, then the first sliding block 310 and the second sliding block 311 also approach each other, driving the lifting plate 307 to move downward, so that the upper clamping member 313 moves downward; while when moving away, the telescopic member 312 is in a retracted state, then the first sliding block 310 and the second sliding block 311 also move away from each other, driving the lifting plate 307 to move upward, so that the upper clamping member 313 moves upward. Thus, the distance between the upper clamping member 313 and the lower clamping member 314 is changed, and the purpose of adjusting the clamping specifications is achieved.

[0030] In summary: The present invention is customized once, eliminating the waste caused by multiple purchases and non-use; it is more durable, greatly reducing losses. Moreover, the pile extraction construction has a relatively high risk coefficient, and the connection with the lifted object during the hoisting process is of utmost importance. This fixture improves work efficiency while effectively enhancing the construction safety. Before using this set of customized fixtures, the position of the fixture was relatively weak during the hoisting process, the fixture was severely deformed, with large losses, and needed to be frequently replaced, posing a significant safety hazard. During the construction process, there was a situation where the diameter of the steel bars of the old piles did not match the data, resulting in the inadaptability of the fixture. It took a long time from re-purchasing the fixture to putting it into use, affecting the construction progress and wasting manpower and material resources. By observing and analyzing, the measure of customized fixtures was proposed. By using the customized fixtures, the problems of the fixture not clamping tightly, being easily deformed, and having a large safety risk were solved, and the unnecessary efficiency loss caused by replacing the fixture was solved, greatly improving the construction efficiency. At the same time, this customized fixture can be extended to various construction problems involving the use of fixtures.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel pile-pulling fixture device, characterized in that, It includes a bent steel bar (1), on the outer surface of which an anti - detachment mechanism (2) is sleeved. In the middle of the top end of the bent steel bar (1), a lifting mechanism (3) is arranged, and a steel wire rope (4) is fixedly connected to the top end of the lifting mechanism (3).

2. The novel pile extraction fixture device according to claim 1, characterized in that: The anti - detachment mechanism (2) includes a thick steel plate (201), a U - shaped steel plate (202), bolts (203) and nuts (204). A number of groups of holes are symmetrically penetrated through the left and right sides of the U - shaped steel plate (202). The U - shaped steel plate (202) is arranged on the front side of the thick steel plate (201), and the thick steel plate (201) is fixedly connected to the U - shaped steel plate (202) through a number of groups of bolts (203) and nuts (204).

3. A novel pile-pulling fixture device according to claim 1, characterized in that: The lifting mechanism (3) includes a mounting frame (301), a threaded rod (302) and a telescopic member (312). The bottom of the steel wire rope (4) is welded to the middle of the top end of the mounting frame (301). The threaded rod (302) is rotatably connected inside the mounting frame (301). The thread directions of the two ends of the threaded rod (302) are opposite, and the two ends of the outer surface of the threaded rod (302) are respectively threadedly connected with a first movable block (304) and a second movable block (305).

4. The novel pile extraction fixture device according to claim 3, characterized in that: The two sides of the top end of the telescopic member (312) are respectively rotatably connected to the first movable block (304) and the second movable block (305), and the two sides of the bottom end of the telescopic member (312) are respectively rotatably connected inside a first sliding block (310) and a second sliding block (311). The first sliding block (310) and the second sliding block (311) are respectively slidably connected to the two ends of the outer surface of a slide rail (308).

5. The novel pile-pulling fixture device according to claim 4, characterized in that: The bottom end of the slide rail (308) is fixedly connected to the top end of a lifting plate (307).

6. The novel pile extraction fixture device according to claim 5, characterized in that: A connecting plate is fixedly installed on the outside of the lifting plate (307). The connecting plate penetrates through a notch (315) opened on the mounting frame (301) on the outside and is fixedly connected to an upper clamping member (313). And a lower clamping member (314) is welded to the bottom end of the front side of the mounting frame (301).

7. A novel pile-pulling fixture device according to claim 3, characterized in that: One end of the threaded rod (302) extends to the outside of the mounting frame (301) and is fixedly connected to a runner (306).

8. A novel pile extraction fixture device according to claim 3, characterized in that: A guide rod (303) is fixedly installed at the top end inside the mounting frame (301). The first movable block (304) and the second movable block (305) are both slidably connected to the outer surface of the guide rod (303).

9. A novel pile extraction fixture device according to claim 1, characterized in that: Baffles (309) are fixedly installed on both the left and right sides of the slide rail (308).

10. A method for using a new pile pulling fixture device, which is used to implement a new pile pulling fixture device as described in claims 1-9, characterized in that, It includes: During the pile - pulling construction, first dig out the soil covering the old pile head. The old pile is twisted off, and the steel bars inside the pile are exposed. Workers bend the steel bars manually; According to the size of the pile foundation steel bars, adjust the lifting mechanism (3) to clamp the middle end of the bent steel bars; Insert the anti - pulling mechanism (2) under the end of the bent steel bar of the pile foundation. Each of the left and right bent steel bars is inserted into the U - shaped steel plate (202). Insert the four bolts (203) of the thick steel plate (201) into four groups of holes. First, tighten the nuts (204) on the two inner bolts (203). At this time, the two ends of the U - shaped steel plate (202) shrink inward due to the pressure of the bolts (203), and the bent part of the U - shaped steel plate (202) generates pressure on the contact surface of the pile foundation steel bar. Then, tighten the nuts (204) on the two outer bolts (203) according to the situation; Select the corresponding number of pile foundation steel bars according to the size of the pile foundation. The lifting mechanism (3) fixed to the pile foundation steel bar is connected to the crane through a steel wire rope (4) for pulling out the pile.

Images