A prestressed pipe pile anti-pulling test device
By combining clamping components and a drive source, the cumbersome problems of pouring concrete and welding in the prestressed pipe pile pull-out test device are solved, realizing efficient and convenient pull-out performance testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SUZHOU KEJIAN CONSTR ENG QUALITY INSPECTION CO LTD
- Filing Date
- 2023-02-07
- Publication Date
- 2026-05-19
AI Technical Summary
Existing prestressed concrete pipe pile pull-out test equipment requires concrete pouring and welding, which is a cumbersome process and affects testing efficiency.
The combination of clamping components and a drive source is used. The clamping components are fixed after contacting the pile body, and the drive source provides a vertically upward force to test the pull-out resistance of the pile body without the need for embedding steel bars and welding.
It simplifies the testing process, improves testing efficiency and convenience, enhances clamping effect, and avoids the hassle of welding and concrete pouring.
Smart Images
Figure CN115977175B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a prestressed pipe pile pull-out test device, belonging to the technical field of pipe pile pull-out test equipment. Background Technology
[0002] Uplift piles are piles driven into underground structures of buildings to counteract the buoyancy force exerted by water in the soil when the structure is below the surrounding water level. They are widely used for anti-buoyancy in large basements, anti-uplift in tall buildings and structures, anti-uplift in offshore dock platforms, anchor pile foundations for suspension bridges and cable-stayed bridges, pile foundations for the bottom slabs of large docks, and anchor pile foundations in static load test piles.
[0003] The static load test of a single vertical tensile pile is the most direct and reliable method for detecting the bearing capacity of a single vertical tensile pile. Since the precast pipe pile itself does not have exposed reinforcing bars and cannot be connected to the main beam of the static load test, the traditional prestressed concrete pipe pile tensile test device is as follows: micro-expansion concrete is poured into the pipe hole of the pipe pile and several reinforcing bars are inserted into the concrete. The reinforcing bars are connected to the steel tie rod by welding, and the tensile force is tested by pressing the steel tie rod with a jack.
[0004] However, the above method requires pouring concrete and welding, which is a troublesome process. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a prestressed pipe pile pull-out test device, which solves the defect in the prior art that testing the pull-out performance of pull-out piles requires additional concrete pouring and welding.
[0006] The technical problem to be solved by this invention is achieved by the following technical solution:
[0007] A prestressed pipe pile pull-out test device, comprising
[0008] The pile body is inserted into the ground, with the top of the pile body exposed on the ground.
[0009] A clamping assembly includes a base and clamping units. The base is sleeved on the pile body. The clamping units are in at least two sets, and all the clamping units are evenly arranged along the circumference of the pile body. Each clamping unit has a clamping member, which is rotatably connected to the base. The clamping member can rotate towards the pile body at a certain angle and abut against the pile body. After the clamping member abuts against the pile body, the two are fixed vertically relative to each other.
[0010] The driving source is located on the ground. The number of driving sources is the same as that of the clamping units and they are arranged in a one-to-one correspondence. The driving source can drive the clamping member to abut against the pile body and generate a vertically upward force on the clamping member after abutment.
[0011] By adopting the above technical solution, when testing the pile, the base is placed on the pile, the position of the drive source is fixed, and the drive source is controlled to drive the clamping part to rotate and abut against the pile. At this time, the drive source generates a vertically upward force on the clamping part. Since the clamping part and the pile are fixed vertically after they abut against each other, the clamping part and the pile can be regarded as a whole. The upward thrust generated by the drive source also acts on the pile and can test its pull-out resistance.
[0012] The above setup requires no embedded steel bars or welding, and its simple and effective structure improves testing efficiency and convenience.
[0013] The present invention is further configured such that: the clamping unit further includes a force-receiving platform connected to the clamping member; when the clamping member abuts against the pile body, the force-receiving platform is horizontal, and the output end of the driving source abuts against the force-receiving platform vertically upward and applies force.
[0014] By adopting the above technical solution, the drive source applies force directly to the clamping part vertically upward through the force-bearing platform. Compared with the traditional drive source that applies force vertically downward in the opposite direction, it has fewer restrictions and is more convenient.
[0015] The present invention is further configured such that: after the clamping member abuts against the pile body, the driving source also generates a force on the clamping member along the radial direction of the pile body and toward the pile body.
[0016] By adopting the above technical solution, when the clamping component comes into contact with the pile body, the driving source not only generates a force that drives the pile body upward, but also generates a force on the clamping component along the radial direction of the pile body and toward the pile body, so that the clamping component generates a squeezing force on the pile body. On the basis of constant friction coefficient, the friction between the pile body and the clamping component is further increased, and it is difficult for the clamping component and the pile body to slip.
[0017] The present invention is further configured such that: the clamping unit further includes an abutting inclined surface, the output end of the driving source abuts against the abutting inclined surface horizontally, and when the clamping member abuts against the pile body, the driving source generates a force on the clamping member radially toward the pile body through the abutting inclined surface.
[0018] By adopting the above technical solution, the horizontal arrangement of the drive source and its cooperation with the inclined surface increase the pressure of the clamping component on the outer wall of the pile body and enhance the friction, making it less likely for relative sliding to occur in the vertical direction during the test.
[0019] The present invention is further configured such that: the clamping unit also has an extension member, the extension member is connected to the clamping member, the extension member is capable of rotating relative to the clamping member about the axis of the pile body; the extension member and the clamping member are capable of simultaneously abutting against the pile body, and after abutting, the driving source drives the extension member to generate a rotational tendency.
[0020] By adopting the above technical solution, after rotating a certain angle, the extension and the clamping part can simultaneously abut against the pile body, and the extension can rotate relative to the clamping part around the rotation axis of the pile body, so that friction is formed between the extension and the pile body, further preventing relative sliding between the pile body and the clamping assembly.
[0021] The invention is further configured such that: the extension has a rotating inclined surface, the output end of the drive source has a protruding extension, the abutting inclined surface has a movable hole corresponding to the rotating inclined surface, and the extension is movably disposed vertically within the movable hole; the extension passes through the movable hole and abuts against the rotating inclined surface, and the extension abuts against the rotating inclined surface, causing the extension to rotate.
[0022] By adopting the above technical solution, the cooperation between the extension and the rotating inclined plane enables the drive source to generate friction between the extension and the pile.
[0023] The present invention is further configured such that two opposing gaps are formed between two adjacent clamping members at the outer wall of the pile body.
[0024] By adopting the above technical solution, two relative gaps are formed between two adjacent clamping members at the outer wall of the pile body, which facilitates the cooperation with the pile body.
[0025] The invention is further configured such that: the top of the extension has a connecting portion, the bottom of the clamping member has a connecting groove, the connecting portion is movably fitted into the connecting groove, and the extension rotates relative to the clamping member by moving the connecting portion within the connecting groove; the two ends of the connecting groove are connected to the two sides of the bottom of the clamping member, and the connecting portion can simultaneously enter the connecting grooves of two adjacent clamping members, so that the two adjacent clamping members are connected through the extension.
[0026] By adopting the above technical solution, the connection part and the connection groove are designed so that two adjacent clamping parts can form a whole, thereby improving the clamping capacity of the clamping assembly.
[0027] The beneficial effects of this invention are:
[0028] 1. When testing the pile, the base is placed on the pile, the position of the drive source is fixed, and the drive source is controlled to drive the clamp to rotate and abut against the pile. At this time, the drive source generates a vertically upward force on the clamp. Since the clamp and the pile are fixed vertically after they abut against each other, the clamp and the pile can be regarded as a whole. The upward thrust generated by the drive source also acts on the pile and can test its pull-out resistance.
[0029] 2. The above setup does not require embedding steel bars or welding, and its structure is simple and effective, improving testing efficiency and convenience. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the overall structure in one embodiment of this application, used to illustrate the state when the drive source is arranged vertically;
[0031] Figure 2 This is a schematic diagram of the overall structure in another embodiment of this application, used to illustrate the state when the drive source is arranged horizontally;
[0032] Figure 3 This is a schematic diagram of the connecting frame structure in an embodiment of this application;
[0033] Figure 4 This is a schematic diagram of the structure of the clamping member and the extension member in the embodiments of this application;
[0034] Figure 5 This is a schematic diagram of the structure of the driver source in the embodiments of this application;
[0035] Figure 6 This is a schematic diagram showing the state in which the extension member rotates to be connected with two adjacent clamping links to form an integral part in an embodiment of the horizontal arrangement of the drive source of this application.
[0036] In the diagram: 100, pile body; 20, base; 31, clamping component; 32, connecting frame; 321, movable hole; 33, force-bearing platform; 34, abutting inclined surface; 35, connecting groove; 40, drive source; 41, extension; 50, extension component; 51, mating block; 52, rotating inclined surface; 53, connecting part; 60, gap. Implementation
[0037] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific figures 1-6.
[0038] As shown in the figure, a prestressed concrete pipe pile pull-out test device is used for pull-out testing of pile 100. The pile 100 is inserted into the ground, with its top exposed above the ground. The device includes a clamping assembly and a drive source 40. The clamping assembly clamps the pile 100 to form a single unit, and the drive source 40 acts on the clamping assembly to provide an upward force for the pull-out test of the pile 100.
[0039] The clamping assembly includes a base 20 and clamping units. The base 20 is sleeved on the pile body 100. There are at least two sets of clamping units. In this embodiment, there are two sets of clamping units. All clamping units are evenly arranged along the circumference of the pile body 100. The clamping unit has a clamping member 31, which is rotatably connected to the base 20. The clamping member 31 can rotate towards the pile body 100 at a certain angle and abut against the pile body 100. After the clamping member 31 abuts against the pile body 100, the two are fixed vertically relative to each other.
[0040] The clamping unit also includes a connecting frame 32, the top end of which is fixedly connected to the clamping member 31 and the bottom end is rotatably connected to the base 20. The clamping member 31 is arc-shaped and fits against the outer wall of the pile body 100.
[0041] In this embodiment, the driving source 40 is a jack. The driving source 40 is set on the base on the ground. The number of driving sources 40 is the same as that of the clamping units and they are arranged in a one-to-one correspondence. The driving source 40 can drive the clamping member 31 to abut against the pile body 100 and generate a vertically upward force on the clamping member 31 after abutment.
[0042] In one embodiment, the clamping unit further includes a force-receiving platform 33 connected to the clamping member 31. When the clamping member 31 abuts against the pile body 100, the force-receiving platform 33 is horizontal. The force-receiving platform 33 is fixed on the connecting frame 32. The driving source 40 is vertically upward. The output end of the driving source 40 abuts against the force-receiving platform 33 and applies force along the vertical upward direction.
[0043] In one embodiment, after the clamping member 31 abuts against the pile body 100, the drive source 40 also generates a force on the clamping member 31 in the radial direction of the pile body 100 and toward the pile body 100.
[0044] Specifically, the clamping unit also includes an abutment ramp 34, which is located on the connecting frame 32. The drive source 40 is horizontally positioned, with its output end facing the pile body 100 and abutting against the abutment ramp 34 horizontally. When the clamping member 31 abuts against the pile body 100, the drive source 40 generates a force on the clamping member 31 radially toward the pile body 100 through the abutment ramp 34. At this time, the total horizontal force of the drive source 40 through the abutment ramp 34 is decomposed into a component force that lifts the pile body 100 upwards and a component force that causes the clamping member 31 to press against the outer wall of the pile body 100.
[0045] In one embodiment, the clamping unit further includes an extension 50 connected to the clamping member 31. The extension 50 is capable of rotating relative to the clamping member 31 about the axis of the pile body 100. When the output end of the drive source 40 applies a horizontal force and gradually drives the clamping member 31 to rotate at a certain angle, the extension 50 and the clamping member 31 can simultaneously abut against the pile body 100, and after abutment, the drive source 40 drives the extension 50 to rotate.
[0046] The extension 50 has a mating block 51, the mating block 51 has a rotating inclined surface 52, the output end of the drive source 40 has a protruding extension 41, the abutting inclined surface 34 has a movable hole 321 corresponding to the rotating inclined surface 52, the movable hole 321 is located on the connecting frame 32; the extension 50 is vertically movably disposed in the movable hole 321; the extension 41 passes through the movable hole 321 through the abutting inclined surface 34 and abuts against the rotating inclined surface 52, the extension 41 abuts against the rotating inclined surface 52 and forms pressure, causing the extension 50 to rotate, and after generating friction, it prevents the clamping member 31 and the pile body 100 from sliding relative to each other vertically.
[0047] In one embodiment, two opposing gaps 60 are formed between two adjacent clamping members 31 at the outer wall of the pile body 100. The top of the extension member 50 has a connecting portion 53, and the bottom of the clamping member 31 has a connecting groove 35. The connecting portion 53 is movably fitted into the connecting groove 35, and the extension member 50 rotates relative to the clamping member 31 by moving the connecting portion 53 within the connecting groove 35. The two ends of the connecting groove 35 are connected to the two sides of the bottom of the clamping member 31, and the connecting portion 53 can simultaneously enter the connecting groove 35 of two adjacent clamping members 31, so that the two adjacent clamping members 31 are connected by the extension member 50.
[0048] 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 to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A prestressed pipe pile pull-out test device, characterized in that: include A pile (100) is inserted into the ground, with the top of the pile (100) exposed above the ground. The clamping assembly includes a base (20) and clamping units. The base (20) is sleeved on the pile body (100). The clamping units have at least two sets, and all the clamping units are evenly arranged along the circumference of the pile body (100). The clamping unit has a clamping member (31), which is rotatably connected to the base (20). The clamping member (31) can rotate towards the pile body (100) at a certain angle and abut against the pile body (100). After the clamping member (31) abuts against the pile body (100), the two are fixed vertically relative to each other. The driving source (40) is located on the ground. The number of the driving sources (40) is the same as that of the clamping unit and they are arranged in a one-to-one correspondence. The driving source (40) can drive the clamping member (31) to abut against the pile body (100) and generate a vertically upward force on the clamping member (31) after abutting. The clamping unit also has an extension (50) connected to the clamping member (31). The extension (50) can rotate relative to the clamping member (31) about the axis of the pile body (100). The extension (50) and the clamping member (31) can simultaneously abut against the pile body (100), and after abutting, the driving source (40) drives the extension (50) to rotate. The clamping unit further includes an abutting inclined surface (34). The output end of the drive source (40) abuts against the abutting inclined surface (34) horizontally. When the clamping member (31) abuts against the pile body (100), the drive source (40) generates a force on the clamping member (31) radially toward the pile body (100) through the abutting inclined surface (34). The extension (50) has a rotating inclined surface (52), and the output end of the drive source (40) has a protruding extension (41). The abutting inclined surface (34) has a movable hole (321) corresponding to the rotating inclined surface (52). The extension (50) is vertically movably disposed in the movable hole (321). The extension (41) passes through the movable hole (321) and abuts against the rotating inclined surface (52). After the extension (41) abuts against the rotating inclined surface (52), the extension (50) tends to rotate.
2. The prestressed pipe pile pull-out test device according to claim 1, characterized in that: The clamping unit also includes a force-receiving platform (33) connected to the clamping member (31). When the clamping member (31) abuts against the pile body (100), the force-receiving platform (33) is horizontal, and the output end of the drive source (40) abuts against the force-receiving platform (33) and applies force in a vertically upward direction.
3. The prestressed pipe pile pull-out test device according to claim 1, characterized in that: When the clamping member (31) comes into contact with the pile body (100), the driving source (40) also generates a force on the clamping member (31) radially toward the pile body (100).
4. The prestressed pipe pile pull-out test device according to claim 1, characterized in that: Two opposing gaps (60) are formed between two adjacent clamping members (31) at the outer wall of the pile body (100).
5. The prestressed pipe pile pull-out test device according to claim 4, characterized in that: The extension (50) has a connecting part (53) at its top and a connecting groove (35) at its bottom. The connecting part (53) is movably fitted into the connecting groove (35). The extension (50) rotates relative to the clamping member (31) by moving the connecting part (53) within the connecting groove (35). The two ends of the connecting groove (35) are connected to the two sides of the bottom of the clamping member (31). The connecting part (53) can simultaneously enter the connecting groove (35) of two adjacent clamping members (31), so that the two adjacent clamping members (31) are connected through the extension (50).