A clamping mechanism and a single-pile uplift bearing capacity detection device thereof

Abstract

The utility model relates to a bearing capacity detection technical field, and disclose a kind of clamping mechanism and single-pile uplift bearing capacity detection device, comprising: bottom plate;Turnover body;Top plate;Pull rod, it is used to realize transmission cooperation between top plate and turnover body, the both ends of pull rod are connected with turnover body and top plate respectively, the connecting point of pull rod and turnover body is close to the bottom end of turnover body, since the connecting point of pull rod and turnover body is located below the rotation center of turnover body, further in the process of lifting top plate, the pulling force of pull rod to turnover body is towards the center position of top plate, multiple turnover bodies can be mutually overturned to be close to the wall surface of clamping pipe pile, with the increase of vertical direction pulling force applied to top plate, the centripetal tension provided by pull rod to turnover body is greater, further, the extrusion degree of turnover body to pipe pile is greater, and the anti-skid effect is better, the clamping effect of multiple turnover bodies to pipe pile is more optimal, reduce the detection of sliding to uplift performance.

Description

Technical Field

[0001] This utility model relates to the field of bearing capacity testing technology, and in particular to a clamping mechanism and a device for testing the pull-out bearing capacity of a single pile. Background Technology

[0002] The prior art discloses a single pile pull-out bearing capacity testing device (publication number: CN219327119U). In view of the problems of the existing device requiring the manufacture of pile caps, subsequent breaking of pile caps, precise alignment requirements for pull-out system installation, and high cost, the following solution is proposed: it includes two supports, the pile to be tested, and multiple main reinforcement bars of the pile. The two supports are set on the ground and located on both sides of the pile to be tested. The upper surface of the two supports is fixedly connected to the reaction beam, and the upper surface of the reaction beam is fixedly connected to the jack.

[0003] In existing technologies, the connection between a single pile and the testing equipment is achieved by tightening bolts and nuts. During installation and disassembly, multiple bolts and nuts need to be tightened and loosened. Existing technologies also use clamping to fix the pipe pile, which improves the inconvenience caused by the bolt and nut connection method. However, the clamping method is simple. By moving the horizontal rod and pressing against the wall of the pipe pile, the rod is prone to slipping relative to the pipe pile during the pull-out process, which affects the test results. There is room for optimization in the clamping method of the pipe pile.

[0004] To this end, we propose a clamping mechanism and a device for testing the pull-out bearing capacity of a single pile. Utility Model Content

[0005] The present invention mainly solves the technical problems of the above-mentioned clamping method being cumbersome and having unsatisfactory clamping effect, and provides a clamping mechanism and a single pile pull-out bearing capacity testing device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a clamping mechanism and a single pile pull-out bearing capacity testing device, comprising:

[0007] The base plate forms a circular plate structure and is used for installation.

[0008] A rotating body, a rod structure that is rotatably connected to the base plate and used to clamp the pipe pile; there are several rotating bodies.

[0009] The top plate is placed above the bottom plate and is used for load-bearing.

[0010] A pull rod is installed between the top plate and the tilting body to achieve transmission. The two ends of the pull rod are connected to the tilting body and the top plate respectively, and the connection point between the pull rod and the tilting body is close to the bottom end of the tilting body.

[0011] An anti-slip component is provided at the end of the tilting body to abut against the pipe pile. The anti-slip component includes an abutment block and an extension rod. The extension rod is fixedly connected to the abutment block and slidably connected to the tilting body. Fasteners are provided on the wall of the tilting body to limit the extension rod.

[0012] In a preferred embodiment of this utility model, the top of the base plate is provided with several notches, and the flipping body is located in the corresponding notches.

[0013] In a preferred embodiment of this utility model, a through-hole is provided on the inner wall of the notch, and a through-hole rotating shaft is installed on the wall of the flipping body. The rotating shaft is rotatably connected to the shaft hole. Limit nuts are threaded to the outer walls of both ends of the rotating shaft, and the limit nuts are located on the outer wall side of the flipping body. The rotating shaft is close to the top of the flipping body, and the rotating shaft moves through the flipping body and the two are rotatably connected.

[0014] In a preferred embodiment of this utility model, ear plates are fixedly installed on the top plate and the wall of the flipping body, and the two ends of the pull rod are respectively rotatably connected to the two ear plates. The connection position of the pull rod and the flipping body is located below the rotatable connection position of the flipping body.

[0015] In a preferred embodiment of this utility model, the anti-slip component further includes positioning holes, and a plurality of positioning holes are formed on the wall surface of the extension rod. The fastener includes a bolt, which is inserted into the positioning hole.

[0016] In a preferred embodiment of this utility model, the bottom end of the flipping body is provided with a slot for an extension rod, and the extension rod is slidably connected to the slot of the flipping body.

[0017] In a preferred embodiment of this utility model, the contact block is fixedly connected to the bottom end of the extension rod, and the contact block and the extension rod together form an L-shaped rod structure. Several triangular anti-slip grooves are provided on the side wall of the contact block away from the flipping body.

[0018] A device for testing the pull-out bearing capacity of a single pile includes a support frame, with all the aforementioned clamping mechanisms provided below the support frame, and a top plate fixedly installed at the bottom of the support frame.

[0019] Beneficial effects

[0020] This utility model provides a clamping mechanism and a device for testing the pull-out bearing capacity of a single pile. It has the following beneficial effects:

[0021] 1. The clamping mechanism and its single pile pull-out bearing capacity testing device, since the connection point between the tie rod and the rotating body is located below the rotation center of the rotating body, during the process of lifting the top plate, the pulling force of the tie rod on the rotating body is towards the center of the top plate. Multiple rotating bodies can rotate towards each other and approach the wall of the clamping pipe pile. As the vertical pulling force applied to the top plate increases, the centripetal pulling force provided by the tie rod to the rotating body is greater, and thus the squeezing force of the rotating body on the pipe pile is greater, the anti-slip effect is better, the clamping effect of multiple rotating bodies on the pipe pile is better, and the detection of pull-out performance is reduced by slippage.

[0022] 2. This clamping mechanism and its single pile pull-out bearing capacity testing device, by setting anti-slip components, when the flipping body flips and approaches another flipping body, the flipping body drives the contact block to contact the pipe pile. Through the anti-slip groove opened on the wall of the contact block, the pressure of the contact block on the pipe pile is increased, and the anti-slip effect is improved. Pulling the contact block drives the extension rod to slide along the groove of the flipping body, and inserting the screw into the positioning hole to lock the position of the extension rod. Adjusting the rotation radius of the contact block can adapt to the clamping of pipe piles of different diameters within a certain range. It has strong adaptability and high adjustability, which is more conducive to actual testing.

[0023] 3. The clamping mechanism and its single pile pull-out bearing capacity testing device, by setting the above-mentioned clamping mechanism, makes the whole device more adaptable to clamping pipe piles, the clamping force is more firm, and it is not easy to slip. It is more practical for clamping pipe pile testing. Attached Figure Description

[0024] Figure 1 This is one of the overall perspective views of this utility model;

[0025] Figure 2 This is the second perspective view of the present utility model;

[0026] Figure 3 A schematic diagram showing the notch in the base plate of this utility model;

[0027] Figure 4 This is a schematic diagram showing the connection between the flipping body and the top plate of this utility model;

[0028] Figure 5 This is an assembly drawing of the contact block and the flipping body of this utility model.

[0029] Legend: 10. Base plate; 11. Flip-over body; 12. Top plate; 13. Notch; 14. Tie rod; 20. Abutment block; 21. Extension rod; 22. Positioning hole. Detailed Implementation

[0030] A clamping mechanism and its single pile pull-out bearing capacity testing device, such as Figure 1 and Figure 2 As shown, it includes:

[0031] Base plate 10, forming a circular plate structure and used for installation;

[0032] The rotating body 11 is a rod structure that is rotatably connected to the base plate 10 and used to clamp the pipe pile. Several rotating bodies 11 are included.

[0033] The top plate 12 is positioned above the bottom plate 10 and is used for load-bearing.

[0034] like Figure 3 and Figure 4 As shown, a pull rod 14 is disposed between the top plate 12 and the rotating body 11 for transmission. Both ends of the pull rod 14 are connected to the rotating body 11 and the top plate 12 respectively. The connection point between the pull rod 14 and the rotating body 11 is near the bottom end of the rotating body 11. The top of the bottom plate 10 has several notches 13, and the rotating body 11 is located within the corresponding notch 13. A through-hole shaft is formed on the inner wall of the notch 13. A through-hole rotating shaft is installed on the wall of the rotating body 11, and the rotating shaft is rotatably connected to the shaft hole. Limit nuts are threaded onto the outer walls of both ends of the rotating shaft, and the limit nuts are located on the outer wall side of the rotating body 11. The rotating shaft is near the top of the rotating body 11, and the rotating shaft movably passes through the rotating body 11, with the two rotatably connected. Ear plates are fixedly installed on the walls of both the top plate 12 and the rotating body 11. Both ends of the pull rod 14 are rotatably connected to two ear plates respectively. The connection point between the pull rod 14 and the rotating body 11 is located near the bottom end of the rotating body 11. Below the rotating connection position, in this scheme, several rotating bodies 11 rotatably connected to the base plate 10 are set up. The rotating bodies 11 are pulled by the tie rod 14, so that the rotating bodies 11 rotate and the lower end of the rotating bodies 11 moves towards the center of the base plate 10. The tie rod 14 can be a rigid rod or a steel cable. Since the connection point between the tie rod 14 and the rotating body 11 is located below the rotation center of the rotating body 11, the pulling force of the tie rod 14 on the rotating body 11 during the lifting of the top plate 12 is towards the center of the top plate 12. Multiple rotating bodies 11 can rotate towards each other and approach the wall of the clamping pipe pile. As the vertical pulling force applied to the top plate 12 increases, the centripetal pulling force provided by the tie rod 14 to the rotating body 11 is greater, and the squeezing force of the rotating body 11 on the pipe pile is greater, the anti-slip effect is better, and the clamping effect of multiple rotating bodies 11 on the pipe pile is better, reducing the detection of sliding and pull-out performance.

[0035] like Figure 4 and Figure 5As shown, an anti-slip component is provided at the end of the flipping body 11 to abut against the pipe pile. The anti-slip component includes an abutment block 20 and an extension rod 21. The extension rod 21 is fixedly connected to the abutment block 20 and slidably connected to the flipping body 11. Fasteners are provided on the wall surface of the flipping body 11 to limit the extension rod 21. The anti-slip component also includes positioning holes 22. Several positioning holes 22 are opened on the wall surface of the extension rod 21. Fasteners include bolts, but are not limited to bolts. Bolts are inserted into the positioning holes 22. A groove adapted to the extension rod 21 is opened at the bottom end of the flipping body 11. The extension rod 21 is slidably connected to the groove of the flipping body 11. The abutment block 20 is fixedly connected to the bottom end of the extension rod 21. The abutment block 20 and the extension rod 21 together form a... The structure is an L-shaped rod. The side wall of the contact block 20 away from the flipping body 11 has several triangular anti-slip grooves. By setting the anti-slip components, when the flipping body 11 flips and approaches another flipping body 11, the flipping body 11 drives the contact block 20 to contact the pipe pile. The anti-slip grooves on the wall of the contact block 20 increase the pressure of the contact block 20 on the pipe pile and improve the anti-slip effect. Pulling the contact block 20 drives the extension rod 21 to slide along the groove of the flipping body 11. The screw is inserted into the positioning hole 22 to lock the position of the extension rod 21. Adjusting the rotation radius of the contact block 20 can adapt to the clamping of pipe piles of different diameters within a certain range. It has strong adaptability and high adjustability, which is more conducive to actual testing.

[0036] As shown in the figure, a single pile pull-out bearing capacity testing device includes a support frame. All the aforementioned clamping mechanisms are located below the support frame. A top plate 12 is fixedly installed at the bottom of the support frame. The top plate 12 can be suspended from the bottom of the support frame by steel cables or secured with bolts. A hydraulic cylinder is located at the bottom of the support frame. The hydraulic cylinder pushes the support frame upwards, thereby causing the top plate 12 to move vertically, thus enabling the testing of the pull-out capacity of the pipe pile. By setting the aforementioned clamping mechanisms, the entire device becomes more adaptable to clamping pipe piles, with a stronger clamping force, and less prone to slippage. This makes it more practical for testing pipe pile clamping.

[0037] The working principle of this utility model is as follows: The top plate 12 can be suspended from the bottom of the support frame by steel cables or fastened with bolts. The bottom of the support frame is equipped with a hydraulic cylinder. The hydraulic cylinder pushes the support frame upward, thereby causing the top plate 12 to move vertically, realizing the pull-out resistance test of the pipe pile. Pulling the abutment block 20 causes the extension rod 21 to slide along the groove of the flipping body 11. The screw is inserted into the positioning hole 22 to lock the position of the extension rod 21. Adjusting the rotation radius of the abutment block 20 can adapt to the clamping of pipe piles of different diameters within a certain range. When the flipping body 11 flips and approaches another flipping body 11, the flipping body 11 causes the abutment block 20 to contact the pipe pile. The anti-slip groove opened on the wall of the abutment block 20 increases the contact between the abutment block 20 and the pipe pile. To increase the pressure and improve the anti-slip effect, the pull rod 14 is used to pull the flipping body 11, causing the flipping body 11 to flip and its lower end to move towards the center of the bottom plate 10. The pull rod 14 can be a rigid rod or a steel cable. Since the connection point between the pull rod 14 and the flipping body 11 is located below the rotation center of the flipping body 11, the pulling force of the pull rod 14 on the flipping body 11 during the lifting of the top plate 12 is towards the center of the top plate 12. Multiple flipping bodies 11 can flip each other and move closer to the wall of the clamping pipe pile. As the vertical pulling force applied to the top plate 12 increases, the centripetal pulling force provided by the pull rod 14 to the flipping body 11 is greater, and thus the squeezing force of the flipping body 11 on the pipe pile is greater, suppressing the slippage phenomenon.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A clamping mechanism, characterized in that, include: The base plate (10) forms a circular plate structure and is used for installation; The rotating body (11) is a rod structure that is rotatably connected to the base plate (10) and used to clamp the pipe pile. The rotating body (11) has several parts. The top plate (12) is set above the bottom plate (10) and is used for load-bearing; A pull rod (14) is set between the top plate (12) and the flipping body (11) to realize the transmission cooperation. The two ends of the pull rod (14) are respectively connected to the flipping body (11) and the top plate (12). The connection point between the pull rod (14) and the flipping body (11) is close to the bottom end of the flipping body (11). An anti-slip component is provided at the end of the flipping body (11) to abut against the pipe pile. The anti-slip component includes an abutment block (20) and an extension rod (21). The extension rod (21) is fixedly connected to the abutment block (20) and slidably connected to the flipping body (11). Fasteners are provided on the wall of the flipping body (11) to limit the extension rod (21).

2. The clamping mechanism according to claim 1, characterized in that: The top of the base plate (10) has several notches (13), and the flipping body (11) is located in the corresponding notch (13).

3. The clamping mechanism according to claim 2, characterized in that: The inner wall of the notch (13) is provided with a through shaft hole, and the wall of the flipping body (11) is provided with a through shaft. The shaft is rotatably connected to the shaft hole. Both ends of the shaft are threaded with limit nuts, and the limit nuts are located on the outer wall of the flipping body (11). The shaft is close to the top of the flipping body (11), and the shaft moves through the flipping body (11) and the two are rotatably connected.

4. The clamping mechanism according to claim 1, characterized in that: The top plate (12) and the wall of the flipping body (11) are both fixedly installed with ear plates. The two ends of the pull rod (14) are rotatably connected to the two ear plates respectively. The connection position of the pull rod (14) and the flipping body (11) is located below the rotatable connection position of the flipping body (11).

5. The clamping mechanism according to claim 1, characterized in that: The anti-slip component also includes positioning holes (22), and the wall of the extension rod (21) is provided with several positioning holes (22). The fastener includes a bolt, which is inserted into the positioning hole (22).

6. The clamping mechanism according to claim 5, characterized in that: The bottom end of the flipping body (11) is provided with a slot for the extension rod (21), and the extension rod (21) is slidably connected to the slot of the flipping body (11).

7. The clamping mechanism according to claim 5, characterized in that: The contact block (20) is fixedly connected to the bottom end of the extension rod (21). The contact block (20) and the extension rod (21) together form an L-shaped rod structure. Several triangular anti-slip grooves are provided on the side wall of the contact block (20) away from the flipping body (11).

8. A device for testing the pull-out bearing capacity of a single pile, comprising a bearing frame, characterized in that: The bearing frame is provided with a clamping mechanism as described in any one of claims 1-7 below it, and the top plate (12) is fixedly installed at the bottom of the bearing frame.

Images