Device for removing existing pile foundation at fixed point

Abstract

The utility model provides a device for removing an existing pile foundation at a fixed point, which comprises a plugging plate, two ends of the plugging plate are respectively provided with a first clamp used for wrapping a pile body, two ends of each first clamp are respectively provided with a first support lug, the first support lugs are connected with a second support lug through a fastener formed by a screw and a nut, and the second support lug is connected with the plugging plate. A guide hole is formed in the face, facing the second supporting lug, of the first supporting lug, a guide rod is inserted in the guide hole, a top plate used for limiting the position of a nut is installed at the end, away from the second supporting lug, of the guide rod, a piston is installed at the end, away from the top plate, of the guide rod, and a straight cylinder is arranged on the side, away from the top plate, of the guide hole. A pipe head is installed on the face, away from the first supporting lug, of the straight barrel, and a blanking cap is connected to the end, away from the straight barrel, of the pipe head in a threaded mode.

Description

Technical Field

[0001] This utility model is a device for targeted demolition of existing pile foundations, belonging to the field of pile foundation demolition technology. Background Technology

[0002] Pile foundation demolition is a complex and challenging task, requiring the selection of appropriate techniques based on factors such as the type, size, depth of the pile foundation, surrounding environment, and demolition requirements. Static fracturing is a commonly used method for pile foundation demolition, involving static fracturing agent fracturing: a static fracturing agent is mixed with water and then poured into a pre-drilled hole in the pile. The static fracturing agent undergoes a hydration reaction within the hole, generating expansion pressure that gradually cracks and breaks the pile. When using static fracturing agents to break up piles, to prevent the mixture of static fracturing agent and water from flowing out of the pre-drilled hole and to ensure the effectiveness of the work, sealing plates are used to effectively seal the hole opening. Typically, the sealing plate is fixed to the pile using two semi-circular clamps, which are connected together by fasteners consisting of screws and nuts.

[0003] During the static fracturing process, the pile body gradually expands outward due to internal expansion pressure. As the pile body expands, the clamps are subjected to forces from the pile body, which in turn increases the reaction forces on the screws and nuts connecting the clamps. Under these circumstances, the friction between the screws and nuts also increases, making them difficult to separate, causing many inconveniences to subsequent construction processes, such as requiring a lot of time and manpower to remove the sealing plate. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a device for the fixed-point demolition of existing pile foundations, so as to solve the problems mentioned in the background technology. This utility model minimizes the impact of pile expansion on the disassembly of screws and nuts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for targeted demolition of existing pile foundations, comprising a sealing plate, with first clamps installed at both ends of the sealing plate for wrapping around the pile body, a second clamp forming a ring structure with the first clamp on one side, first lugs installed at both ends of the first clamp, and second lugs installed at both ends of the second clamp, with a gap between the first lugs and the second lugs, the first lugs being connected to the second lugs by fasteners formed by screws and nuts, a guide hole being provided on the side of the first lugs facing the second lugs, a guide rod being inserted into the guide hole, a top plate for limiting the position of the nut being installed at the end of the guide rod away from the second lugs, one end of the screw penetrating the top plate, a piston being installed at the end of the guide rod away from the top plate, a straight cylinder being provided on the side of the guide hole away from the top plate, the open end of the straight cylinder being connected and fixed to the first lug, the piston being slidably installed inside the straight cylinder, a pipe head being installed on the side of the straight cylinder away from the first lug, and a cap being threadedly connected to the end of the pipe head away from the straight cylinder.

[0006] Furthermore, the side of the first ear facing the second ear has two first small holes, the side of the second ear has two second small holes that mate with the first small holes, and the side of the top plate facing the first ear has two third small holes that are aligned with the first small holes. The screw passes through the channel formed by the first small holes, the second small holes and the third small holes and is threaded to connect to the nut.

[0007] Furthermore, the cross-section of the guide hole is rectangular, and the cross-section of the guide rod is rectangular.

[0008] Furthermore, a positioning hole is formed in the middle of the side of the top plate facing the first lug, and the end of the guide rod away from the piston is installed in the positioning hole.

[0009] Furthermore, the sealing plate has an arc-shaped structure, and multiple stiffeners are uniformly fixed on the outer surface of the sealing plate. The two ends of the stiffeners are respectively connected and fixed to two first clamps.

[0010] Furthermore, two first triangular ribs are fixedly connected to the end of the first ear near the first clamp, and the first triangular ribs are fixedly connected to the first clamp.

[0011] Furthermore, two second triangular ribs are fixedly connected to one end of the second lug near the second clamp, and the second triangular ribs are fixedly connected to the second lug.

[0012] The beneficial effects of this utility model are:

[0013] 1. When installing screws and nuts, inject some water into the straight cylinder, and then screw the plug onto the pipe head. At this time, there is a gap between the top plate and the first lug. After the screw passes through the second lug, the first lug and the top plate in sequence, screw on the nut. Then, there is a gap between the nut and the first lug. When the screw and nut are separated after the pile expands and breaks, remove the plug, push the top plate, and the guide rod moves along the guide hole. At the same time, the guide rod drives the piston to squeeze the water in the straight cylinder, so that some water is discharged from the straight cylinder. At this time, the nut does not exert pressure on the top plate, reducing the friction between the two, making it easier to separate the screw and nut when removing the sealing plate, saving construction time and labor costs.

[0014] 2. Because there is a gap between the first and second lugs, on the one hand, it provides installation space for the straight cylinder, and on the other hand, when the screw is deformed, the space between the first and second lugs can be used to cut the screw, which facilitates the recycling and reuse of the first and second clamps. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a device for targeted demolition of existing pile foundations according to the present invention;

[0017] Figure 2 This is another perspective view of the device for targeted demolition of existing pile foundations according to this utility model.

[0018] Figure 3 This is a schematic diagram of the assembly of the straight cylinder, sealing plate and first clamp in a device for targeted demolition of existing pile foundations according to the present invention.

[0019] Figure 4 This is a schematic diagram of the assembly of the sealing plate and the first clamp in a device for targeted demolition of existing pile foundations according to the present invention.

[0020] Figure 5 This is a cross-sectional assembly diagram of the straight cylinder, guide rod, piston, top plate, and first lug in a device for targeted demolition of existing pile foundations according to this utility model.

[0021] Figure 6 This is a schematic diagram of the assembly of the second lug and the second clamp in a device for targeted demolition of existing pile foundations according to this utility model.

[0022] In the diagram: 1-sealing plate, 2-first clamp, 3-screw, 4-nut, 5-top plate, 6-first lug, 7-straight cylinder, 8-second lug, 9-second clamp, 10-pile body, 11-stiffening plate, 12-plug, 13-pipe head, 14-first triangular rib, 15-third small hole, 16-guide rod, 17-first small hole, 18-guide hole, 19-piston, 20-second small hole, 21-second triangular rib. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Please see Figures 1-4 This utility model provides a technical solution: a device for targeted demolition of existing pile foundations, including a sealing plate 1, the sealing plate 1 having an arc-shaped structure, both ends of the sealing plate 1 being equipped with first clamps 2 for wrapping around the pile body 10, and multiple stiffening plates 11 being uniformly fixed on the outer surface of the sealing plate 1, the two ends of the stiffening plates 11 being connected and fixed to two first clamps 2 respectively, the design of the stiffening plates 11 improving the mechanical strength of the structure formed by the sealing plate 1 and the first clamps 2.

[0025] See Figures 1-4 , Figure 6The first clamp 2 has a second clamp 9 on one side, forming a ring structure with the first clamp 2. Both ends of the first clamp 2 are equipped with first lugs 6. Two first triangular ribs 14 are connected and fixed to the end of the first lug 6 near the first clamp 2. The first triangular ribs 14 are connected and fixed to the first clamp 2, and the first triangular ribs 14 improve the mechanical strength of the connection between the first lug 6 and the first clamp 2. Both ends of the second clamp 9 are equipped with second lugs 8. Two second triangular ribs 21 are connected and fixed to the end of the second lug 8 near the second clamp 9. The second triangular ribs 21 are connected and fixed to the second lug 8, and the second triangular ribs 21 improve the mechanical strength of the connection between the second lug 8 and the second clamp 9. There is a gap between the first lug 6 and the second lug 8. The first lug 6 is connected to the second lug 8 by a fastener formed by screws 3 and nuts 4. The gap reserved between the first lug 6 and the second lug 8 plays an important role. Firstly, this gap provides space for the installation of the straight cylinder 7, allowing it to connect smoothly to the first lug 6. This, in turn, provides the necessary conditions for the movement of the piston 19 and the realization of its related buffering functions within the entire device. Secondly, in actual use, if the screw 3 deforms, making disassembly difficult through conventional methods, this gap provides significant convenience. Construction workers can use this space between the first lug 6 and the second lug 8 to cut the screw 3 with appropriate tools. This allows for easy separation of the first clamp 2 and the second clamp 9, facilitating their recycling and reuse, effectively saving construction costs and improving resource utilization.

[0026] See Figures 1-6The first lug 6 has a rectangular guide hole 18 on the side facing the second lug 8. A rectangular guide rod 16 is inserted into the guide hole 18. A top plate 5 for limiting the position of the nut 4 is installed at the end of the guide rod 16 away from the second lug 8. The top plate 5 has a recessed positioning hole in the middle of the side facing the first lug 6, so that the end of the guide rod 16 away from the piston 19 is installed in the positioning hole, increasing the connection range between the guide rod 16 and the top plate 5. One end of the screw 3 passes through the top plate 5. The first lug 6 has two first small holes 17 on the side facing the second lug 8, and the second lug 8 has two second small holes 20 that mate with the first small holes 17. The top plate 5 faces the first lug 6. One side of the lug 6 has two third holes 15 aligned with the first small hole 17. The screw 3 passes through the channel formed by the first small hole 17, the second small hole 20, and the third small hole 15, and is threaded onto the nut 4. A piston 19 is installed on the end of the guide rod 16 away from the top plate 5. A straight cylinder 7 is located on the side of the guide hole 18 away from the top plate 5. The open end of the straight cylinder 7 is connected and fixed to the first lug 6. The piston 19 is slidably installed inside the straight cylinder 7. A pipe head 13 is installed on the side of the straight cylinder 7 away from the first lug 6. A plug 12 is threaded onto the end of the pipe head 13 away from the straight cylinder 7. During the installation of the screw 3 and nut 4, a suitable amount of water is first injected into the straight cylinder 7, and then the plug 12 is tightened onto the pipe head. At this time, a certain gap will naturally form between the top plate 5 and the first lug 6. Next, the construction worker passes one end of the screw 3 through the second lug 8 and the first lug 6 in sequence, and through the top plate 5, and finally screws on the nut 4. This will also create a gap between the nut 4 and the first lug 6.

[0027] When the pile body 10 has undergone the expansion and crushing stage and it is necessary to separate the screw 3 and nut 4, the construction personnel only need to remove the plug 12 first, and then push the top plate 5. During the pushing process, the guide rod 16 will move smoothly along the guide hole 18. The movement of the guide rod 16 will drive the piston 19 to move inside the straight cylinder 7. The piston 19 will exert pressure on the water inside the straight cylinder 7, causing some water to be discharged from the straight cylinder 7. Due to the discharge of water, there is no longer pressure between the nut 4 and the top plate 5, and the friction between them is also reduced. In this way, the separation of the screw 3 and nut 4 becomes easier when removing the sealing plate 1, effectively saving construction time and reducing labor costs.

[0028] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for targeted demolition of existing pile foundations, comprising a sealing plate (1), characterized in that: Both ends of the sealing plate (1) are equipped with first clamps (2) for wrapping around the pile body (10). A second clamp (9) is provided on one side of the first clamp (2) to form a ring structure with the first clamp (2). Both ends of the first clamp (2) are equipped with first lugs (6), and both ends of the second clamp (9) are equipped with second lugs (8). There is a gap between the first lugs (6) and the second lugs (8). The first lugs (6) are connected to the second lugs (8) by fasteners formed by screws (3) and nuts (4). A guide hole (18) is provided on the side of the first lugs (6) facing the second lugs (8). The guide hole (18) is equipped with a guide hole (18). A guide rod (16) is inserted. A top plate (5) for limiting the position of the nut (4) is installed at the end of the guide rod (16) away from the second lug (8). One end of the screw (3) passes through the top plate (5). A piston (19) is installed at the end of the guide rod (16) away from the top plate (5). A straight cylinder (7) is provided on the side of the guide hole (18) away from the top plate (5). The open end of the straight cylinder (7) is connected and fixed to the first lug (6). The piston (19) is slidably installed in the straight cylinder (7). A tube head (13) is installed on the side of the straight cylinder (7) away from the first lug (6). A plug (12) is threadedly connected to the end of the tube head (13) away from the straight cylinder (7).

2. The device for targeted demolition of existing pile foundations according to claim 1, characterized in that: The first ear (6) has two first holes (17) on the side facing the second ear (8), and the second ear (8) has two second holes (20) that cooperate with the first holes (17) on the side. The top plate (5) has two third holes (15) that are aligned with the first holes (17) on the side facing the first ear (6). The screw (3) is threaded through the channel formed by the first holes (17), the second holes (20) and the third holes (15) and then connected to the nut (4).

3. The device for targeted demolition of existing pile foundations according to claim 1, characterized in that: The guide hole (18) has a rectangular cross-section, and the guide rod (16) has a rectangular cross-section.

4. The device for targeted demolition of existing pile foundations according to claim 1, characterized in that: The top plate (5) has a recessed center on the side facing the first lug (6) to form a positioning hole, and the end of the guide rod (16) away from the piston (19) is installed in the positioning hole.

5. The device for targeted demolition of existing pile foundations according to claim 1, characterized in that: The sealing plate (1) has an arc-shaped structure. Multiple stiffeners (11) are uniformly fixed on the outer surface of the sealing plate (1). The two ends of the stiffeners (11) are respectively connected and fixed to two first clamps (2).

6. The device for targeted demolition of existing pile foundations according to claim 1, characterized in that: Two first triangular ribs (14) are connected and fixed at one end of the first ear (6) near the first clamp (2), and the first triangular ribs (14) are connected and fixed to the first clamp (2).

7. The device for targeted demolition of existing pile foundations according to claim 1, characterized in that: Two second triangular ribs (21) are connected and fixed at one end of the second ear (8) near the second clamp (9). The second triangular ribs (21) are connected and fixed to the second ear (8).

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