Pile foundation single pile vertical compression resistance static load test ballasting platform counterforce device

Abstract

The utility model discloses a ballasting platform counter-force device for a vertical compression resistance static load test of a single pile of a pile foundation, which relates to the technical field of static load pile testing equipment and comprises two bases and a pile testing contact steel plate. A balance weight seat is fixedly connected to the outer wall of the top of the distribution beam, an I-shaped steel beam is fixedly connected to the outer wall of the middle of the bottom of the distribution beam, the same jack is installed between the I-shaped steel beam and the test pile contact steel plate, and a displacement sensor is fixed to the top of the test pile contact steel plate through a clamping structure. According to the utility model, the clamping structure is arranged, so that the disassembly and assembly efficiency of the displacement sensor is improved, and the maintenance and repair work of the displacement sensor is facilitated; the two telescopic supporting leg structures are arranged, the height of the test pile contact steel plate in the pile foundation pit can be flexibly adjusted, and then the compression resistance static load test requirements of test piles with different heights can be better met.

Description

Technical Field

[0001] The utility model relates to the technical field of static load test pile equipment, in particular to a reaction force device of a deadweight platform for vertical compressive static load test of single pile of pile foundation. Background Technique

[0002] The single-pile compressive static load test is a recognized traditional method for detecting the vertical compressive bearing capacity of foundation piles most intuitively and reliably. The reaction force device of the deadweight platform is one of the commonly selected devices for the single-pile compressive static load test, and is usually composed of a base, a distribution beam, a counterweight seat, a steel beam, a test pile contact steel plate, a jack and a displacement sensor.

[0003] In the prior art, the test pile is loaded by the reaction force of the deadweight platform composed of a base, a distribution beam, a counterweight seat and a steel beam on the jack, and the vertical compressive bearing capacity of the foundation pile can be automatically detected by automatically recording the sinking distance of the test pile in the pile pit through the displacement sensor on the test pile contact steel plate.

[0004] However, in the installation process of the displacement sensor, a bolt connection method is often used for installation, which leads to relatively low disassembly and assembly efficiency of the displacement sensor, is not convenient for the maintenance and repair work of the displacement sensor, and cannot flexibly adjust the height of the test pile contact steel plate in the pile foundation pit, and thus cannot meet the requirements of the compressive static load test of test piles with different heights. Content of the Utility Model

[0005] The purpose of the utility model is to solve the defects existing in the prior art, and to provide a reaction force device of a deadweight platform for vertical compressive static load test of single pile of pile foundation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A reaction force device of a deadweight platform for vertical compressive static load test of single pile of pile foundation, comprising two bases and a test pile contact steel plate, the tops of the two bases are connected with a distribution beam through two telescopic leg structures, and a counterweight seat is fixedly connected to the outer wall of the top of the distribution beam;

[0008] An I-shaped steel beam is fixedly connected to the middle outer wall of the bottom of the distribution beam, a jack is installed between the I-shaped steel beam and the test pile contact steel plate, and a displacement sensor is fixed to the top of the test pile contact steel plate through a clamping structure.

[0009] Preferably, the clamping structure includes a chute opened on the top of the test pile contact steel plate, a bidirectional screw rod rotatably installed in the chute, and two T-shaped positioning clamping rods symmetrically screwed on two opposite threaded ends of the bidirectional screw rod.

[0010] Preferably, the outer walls of the two T-shaped positioning clamping rods are both slidably connected with the inner wall of the chute, and a rotating cap is fixedly connected to the outer wall of one end of the bidirectional screw rod.

[0011] Preferably, both of the telescopic outrigger structures include a hollow frame fixedly connected to the outer wall of the top of the base, a threaded vertical rod rotatably installed in the hollow frame, a driving assembly, and a lifting frame threadedly connected to the threaded vertical rod, and a controller is fixedly installed on the side wall of one of the hollow frames.

[0012] Preferably, the outer wall of the lifting frame is slidably connected to the inner wall of the hollow frame, and the outer wall of the top of the lifting frame is fixedly connected to the outer wall of the bottom of the distribution beam.

[0013] Preferably, the driving assembly includes a stepper motor fixedly installed on the side wall of the hollow frame, a worm fixedly sleeved on the output shaft of the stepper motor, and a worm gear fixedly sleeved on the lower part of the threaded vertical rod.

[0014] Preferably, the output shaft of the stepper motor penetrates through the hollow frame, and the worm and the worm gear are meshed with each other.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. A clamping structure is provided. By rotating the bidirectional screw forward, the two T-shaped positioning clamping rods will move closer to the center, achieving the effect of quickly and fixedly installing the displacement sensor. By rotating the bidirectional screw backward, the two T-shaped positioning clamping rods move away from each other, achieving the effect of quickly disassembling the displacement sensor, thereby improving the disassembly and assembly efficiency of the displacement sensor and facilitating the maintenance and repair work of the displacement sensor;

[0017] 2. Two telescopic outrigger structures are provided, enabling the test pile contact steel plate to move downward in the pile foundation pit, which can flexibly adjust the height of the test pile contact steel plate in the pile foundation pit, and thus facilitating better adaptation to the requirements of the compressive static load test of test piles with different heights. Description of the Drawings

[0018] Figure 1 is a three-dimensional structure schematic diagram of the whole utility model;

[0019] Figure 2 is a three-dimensional enlarged structure schematic diagram of the clamping structure in the utility model;

[0020] Figure 3 is a three-dimensional enlarged structure schematic diagram of the bidirectional screw and the two T-shaped positioning clamping rods in the utility model;

[0021] Figure 4 is a three-dimensional enlarged structure schematic diagram of the inside of the hollow frame in the utility model;

[0022] Figure 5 is a three-dimensional enlarged structure schematic diagram of the driving assembly in the utility model.

[0023] In the figure: 1, base; 2, distribution beam; 3, counterweight seat; 4, I-shaped steel beam; 5, test pile contact steel plate; 6, jack; 7, displacement sensor; 8, chute; 9, bidirectional screw; 10, T-shaped positioning clamping rod; 11, rotating cap; 12, hollow frame; 13, threaded vertical rod; 14, lifting frame; 15, stepping motor; 16, worm; 17, worm gear; 18, controller. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Embodiment 1, referring to Figures 1-3 , a reaction device for the vertical compressive static load test of a single pile of a pile foundation, including two bases 1 and a test pile contact steel plate 5;

[0026] In this embodiment, the tops of the two bases 1 are connected with a distribution beam 2 through two telescopic leg structures. The outer wall of the top of the distribution beam 2 is fixedly connected with a counterweight seat 3, and the outer wall of the middle of the bottom of the distribution beam 2 is fixedly connected with an I-shaped steel beam 4;

[0027] In this embodiment, the same jack 6 is installed between the I-shaped steel beam 4 and the test pile contact steel plate 5, and a displacement sensor 7 is fixed on the top of the test pile contact steel plate 5 through a clamping structure;

[0028] Furthermore, the clamping structure includes a chute 8 opened on the top of the test pile contact steel plate 5, a bidirectional screw 9 rotatably installed in the chute 8, and two T-shaped positioning clamping rods 10 symmetrically screwed on two opposite threaded ends of the bidirectional screw 9. The outer walls of the two T-shaped positioning clamping rods 10 are both slidably connected with the inner wall of the chute 8, and one end of the outer wall of the bidirectional screw 9 is fixedly connected with a rotating cap 11;

[0029] When this embodiment is specifically implemented: First, drive the bidirectional screw 9 to rotate forward through the rotating cap 11. Subsequently, under the limitation of the chute 8, the two T-shaped positioning clamping rods 10 threaded with the bidirectional screw 9 will move closer to the center to clamp and fix the displacement sensor 7 placed on the top of the test pile contact steel plate 5, achieving the effect of quick fixed installation;

[0030] Secondly, drive the bidirectional screw 9 to rotate reversely through the rotating cap 11. Subsequently, under the limitation of the chute 8, the two T-shaped positioning clamping rods 10 threaded with the bidirectional screw 9 will move away from each other and loosen the displacement sensor 7, thereby achieving the effect of quick disassembly.

[0031] Embodiment 2, referring to Figure 1 and Figures 4-5, this embodiment is optimized on the basis of Embodiment 1. Specifically: both telescopic leg structures include:

[0032] A hollow frame 12 and a threaded vertical rod 13. The hollow frame 12 is fixedly connected to the top outer wall of the base 1, and the threaded vertical rod 13 is rotatably installed inside the hollow frame 12;

[0033] A lifting frame 14. The lifting frame 14 is threadedly connected to the threaded vertical rod 13, and the outer wall of the lifting frame 14 is slidably connected to the inner wall of the hollow frame 12. The top outer wall of the lifting frame 14 is fixedly connected to the bottom outer wall of the distribution beam 2;

[0034] A driving assembly, which includes a stepping motor 15 fixedly installed on the side wall of the hollow frame 12, a worm 16 fixedly sleeved on the output shaft of the stepping motor 15, and a worm gear 17 fixedly sleeved on the lower part of the threaded vertical rod 13. The output shaft of the stepping motor 15 penetrates the hollow frame 12, and the worm 16 meshes with the worm gear 17;

[0035] Furthermore, a controller 18 is fixedly installed on the side wall of one of the hollow frames 12, and both stepping motors 15 are electrically connected to the controller 18;

[0036] In the specific implementation of this embodiment: the controller 18 is used to control the operation of the two stepping motors 15. At this time, the two stepping motors 15 will drive the two worms 16 to rotate. Subsequently, the two worm gears 17 meshing with the two worms 16 will drive the two threaded vertical rods 13 to rotate. Then, the two lifting frames 14 threadedly connected to the threaded vertical rods 13 will drive the distribution beam 2 to move downward. In this way, the test pile contact steel plate 5 can move downward in the pile foundation pit, and thus the height of the test pile contact steel plate 5 in the pile foundation pit can be flexibly adjusted, which is more convenient to better meet the requirements of the compressive static load test for test piles of different heights.

[0037] Working principle: First, drive the bidirectional screw 9 to rotate forward through the rotating cap 11. Subsequently, under the limitation of the chute 8, the two T-shaped positioning clamping rods 10 threadedly connected to the bidirectional screw 9 will move closer to the center to clamp and fix the displacement sensor 7 placed on the top of the test pile contact steel plate 5, achieving the effect of quick and fixed installation;

[0038] Secondly, the controller 18 is used to control the operation of the two stepping motors 15. At this time, the two stepping motors 15 will drive the two worms 16 to rotate. Subsequently, the two worm gears 17 meshing with the two worms 16 will drive the two threaded vertical rods 13 to rotate. Then, the two lifting frames 14 threadedly connected to the threaded vertical rods 13 will drive the distribution beam 2 to move downward. In this way, the test pile contact steel plate 5 can move downward in the pile foundation pit, and thus the height of the test pile contact steel plate 5 in the pile foundation pit can be flexibly adjusted, which is more convenient to better meet the requirements of the compressive static load test for test piles of different heights;

[0039] Finally, by adding the required number of configuration blocks for the test on the counterweight seat 3, the pressure of the counterweight block will be transmitted to the test pile through the cooperation of the distribution beam 2, the I-shaped steel beam 4, the test pile contact steel plate 5 and the jack 6. By automatically recording the sinking distance of the test pile in the pile pit through the displacement sensor 7, the vertical compressive bearing capacity of the foundation pile can be automatically detected.

[0040] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A weight platform reaction device for a pile foundation single pile vertical compressive static load test, comprising two bases (1) and a test pile contact steel plate (5), characterized in that: The tops of the two bases (1) are connected to a distribution beam (2) via two telescopic leg structures, and a counterweight seat (3) is fixedly connected to the top outer wall of the distribution beam (2); An I-shaped steel beam (4) is fixedly connected to the middle outer wall at the bottom of the distribution beam (2); a jack (6) is installed between the I-shaped steel beam (4) and the test pile contact steel plate (5); and a displacement sensor (7) is fixed to the top of the test pile contact steel plate (5) via a clamping structure.

2. A pile foundation single pile vertical compressive static load test weight platform reaction force device according to claim 1, characterized in that: The clamping structure comprises a slide groove (8) provided at the top of the test pile contact steel plate (5), a bidirectional screw rod (9) rotatably installed in the slide groove (8), and two T-shaped positioning clamp rods (10) symmetrically screwed to two opposite threaded ends of the bidirectional screw rod (9).

3. A pile foundation single pile vertical compressive static load test weight platform reaction force device according to claim 2, characterized in that: The outer walls of the two T-shaped positioning clamping rods (10) are slidably connected to the inner wall of the slide groove (8), and a rotating cap (11) is fixedly connected to the outer wall of one end of the bidirectional screw rod (9).

4. The vertical compressive static load test weight platform reaction device of a pile foundation single pile according to claim 1, characterized in that: The two telescopic leg structures each comprise a hollow frame (12) fixedly connected to the top outer wall of the base (1), a threaded vertical rod (13) rotatably mounted in the hollow frame (12), a drive assembly and a lifting frame (14) threadedly connected to the threaded vertical rod (13), and a controller (18) is fixedly mounted on the side wall of one of the hollow frames (12).

5. A pile foundation single pile vertical compressive static load test weight platform reaction force device according to claim 4, characterized in that: The outer wall of the lifting frame (14) is slidably connected to the inner wall of the hollow frame (12), and the top outer wall of the lifting frame (14) is fixedly connected to the bottom outer wall of the distribution beam (2).

6. A pile foundation single pile vertical compressive static load test weight platform reaction force device according to claim 4, characterized in that: The driving assembly comprises a stepper motor (15) fixedly mounted on the side wall of the hollow frame (12), a worm (16) fixedly sleeved on the output shaft of the stepper motor (15), and a worm wheel (17) fixedly sleeved on the lower part of the threaded vertical rod (13).

7. A pile foundation single pile vertical compressive static load test weight platform reaction force device according to claim 6, characterized in that: The output shaft of the stepper motor (15) passes through the hollow frame (12), and the worm (16) and the worm wheel (17) are meshed with each other.

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