A pile foundation static load detection device

Abstract

The utility model relates to civil engineering test technical field especially is related to a pile foundation static load detection device, including support mechanism and detection mechanism, detection mechanism is located the bottom center position of support mechanism, and the front side of support mechanism is equipped with hydraulic oil station. Through the moving mechanism of lower steel beam and two I -beam bottoms to drive the movement of upper steel beam, lower steel beam and support, and the position of the supercharged hydraulic cylinder in the pile cap top can be adjusted quickly, in addition, the whole structure does not need to be disassembled and can be quickly arranged counterweight piece to carry out static load detection operation, in addition, the whole device is convenient and quick to the deployment detection of next pile foundation, reduces the preparation work before pile foundation detection, and simultaneously can through the extension length of the moving hydraulic cylinder in the adjustment of multiple moving steel frames, thereby to the uneven area around the pile foundation is operated.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering testing technology, and in particular to a static load testing device for pile foundations. Background Technology

[0002] According to the patent document with publication number CN222796546U, the first bearing plate is placed on the pile foundation, and then the jack is placed on the first bearing plate. Subsequently, the second bearing plate is pressed on the jack. The bearing mechanism is used to limit and support the second bearing plate. At this time, the double-headed motor drives the lead screw to bring the guide sleeves closer to each other. Then, the jaws clamp the pile foundation to support the first bearing plate. The pile foundation can then be inspected by the jack.

[0003] The patent document requires that a heavy object be placed on the base plate before the pile foundation is tested, and then the second bearing plate is fixed on the bearing mechanism. When the next pile foundation needs to be tested, the above structure needs to be disassembled and then reinstalled, which is very troublesome and the frequent disassembly and installation is a waste of time. Utility Model Content

[0004] The purpose of this invention is to provide a static load testing device for pile foundations in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A static load testing device for pile foundations includes a support mechanism and a testing mechanism. The testing mechanism is located at the bottom center of the support mechanism, and a hydraulic oil station is provided on the front side of the support mechanism.

[0007] The support mechanism includes a bracket, a booster hydraulic cylinder fixed at the bottom of the bracket, an upper steel beam running through the bracket, multiple upper limit wheels on both the front and rear sides of the upper steel beam, and I-beams fixed at the bottom of both ends of the upper steel beam. A lower steel beam running through the bracket is provided on the lower side, multiple lower limit wheels on both sides of the lower steel beam, and a moving mechanism at both the front and rear ends of the lower steel beam and at the bottom of the I-beam.

[0008] The detection mechanism includes a support plate, a pressure sensor fixed to the top of the support plate, a pad fixed to the top of the pressure sensor, the pad being fixed to the bottom of the booster hydraulic cylinder, and a displacement detection component for detecting pile settlement on the support plate.

[0009] Preferably, the upper limit wheel is rotatably connected to the bracket, and each lower limit wheel is rotatably connected to the bracket.

[0010] Preferably, the displacement detection component includes a limiting plate located on the outside of the support plate. Four displacement sensors are provided on the top of the support plate near the limiting plate, and a limiting plate is fixed on each displacement sensor.

[0011] Preferably, each limiting plate is fixed with four guide sleeves. The end of each limiting plate away from the displacement sensor is slidably connected to the guide sleeve. A screw is rotatably connected inside the guide sleeve, and the screw is connected to the limiting plate by a thread.

[0012] Preferably, the top of both the lower steel beam and the two I-beams are equipped with two sets of counterweights, and the two sets of counterweights are symmetrically arranged about the upper steel beam.

[0013] Preferably, the moving mechanism includes a moving steel frame, a rotating seat rotatably connected to the bottom of the moving steel frame, a hydraulic motor for driving the rotating seat to rotate fixed inside the moving steel frame, a moving motor fixed at the lower end of the rotating seat, a tire fitted on the outside of the moving motor, two sets of moving hydraulic cylinders fixed inside the moving steel frame, and the two sets of moving hydraulic cylinders are symmetrically arranged about the hydraulic motor, and a push plate is provided on the lower side of the moving steel frame, the top of the push plate being fixedly connected to the telescopic part of the two sets of moving hydraulic cylinders.

[0014] Preferably, a through hole is provided at the center of the push plate, and the rotating seat, tire and moving motor are all located in the through hole of the push plate.

[0015] Compared with existing technologies, the advantages are as follows: The upper steel beam, lower steel beam and support are moved by the moving mechanism at the bottom of the lower steel beam and two I-beams, and the position of the booster hydraulic cylinder at the top of the pile cap can be quickly adjusted. In addition, the entire structure can be quickly arranged with counterweights for static load testing without disassembly. Furthermore, the entire device facilitates the rapid deployment and testing of the next pile foundation, reducing the preparation work before pile foundation testing. At the same time, the uneven areas around the pile foundation can be operated by adjusting the extension length of the moving hydraulic cylinders in multiple moving steel frames. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the pile foundation static load testing device described in this utility model;

[0018] Figure 2 This is a schematic diagram of the upper steel beam and two I-beams of the pile foundation static load testing device described in this utility model;

[0019] Figure 3 This is a schematic diagram of the detection mechanism structure of the pile foundation static load testing device described in this utility model;

[0020] Figure 4This is a schematic diagram of the support mechanism structure of the pile foundation static load testing device described in this utility model;

[0021] Figure 5 This is a schematic diagram of the hydraulic motor structure of the pile foundation static load testing device described in this utility model;

[0022] Figure 6 This is a schematic diagram of the movable steel frame structure of the pile foundation static load testing device described in this utility model;

[0023] Figure 7 This is a schematic diagram of the jacking plate structure of the pile foundation static load testing device described in this utility model;

[0024] Figure 8 This is a schematic diagram of the moving motor structure of the pile foundation static load testing device described in this utility model.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Support mechanism; 2. Detection mechanism; 3. Moving mechanism; 4. Hydraulic oil station; 5. Counterweight; 6. I-beam; 11. Bracket; 12. Upper limit wheel; 13. Upper steel beam; 14. Lower limit wheel; 15. Lower steel beam; 16. Booster hydraulic cylinder; 21. Pad plate; 22. Pressure sensor; 23. Support plate; 24. Limit frame; 25. Screw; 26. Limit plate; 27. Displacement sensor; 31. Moving steel frame; 32. Moving hydraulic cylinder; 33. Push plate; 34. Hydraulic motor; 35. Rotating seat; 36. Tire; 37. Moving motor. Detailed Implementation

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figures 1-8 As shown, a static load testing device for pile foundation includes a support mechanism 1 and a testing mechanism 2. The testing mechanism 2 is located at the bottom center of the support mechanism 1, and a hydraulic oil station 4 is provided on the front side of the support mechanism 1.

[0030] In this embodiment: the support mechanism 1 includes a bracket 11, a booster hydraulic cylinder 16 fixed at the bottom of the bracket 11, an upper steel beam 13 extending through the bracket 11, multiple upper limit wheels 12 on both the front and rear sides of the upper steel beam 13, and I-beams 6 fixed at the bottom of both ends of the upper steel beam 13. A lower steel beam 15 extending through the bracket 11 is provided on the lower side, with multiple lower limit wheels 14 on both sides of the lower steel beam 15. The upper limit wheels 12 are rotatably connected to the bracket 11, and each lower limit wheel 14 is rotatably connected to the bracket 11. The lower steel beam 15 extends through the bracket 11. Both ends and the bottom of the I-beam 6 are equipped with a moving mechanism 3. Multiple upper limit wheels 12 on the bracket 11 are used to facilitate the movement of the upper steel beam 13 to both sides, thereby adjusting the position of the two I-beams 6, so that the booster hydraulic cylinder 16 is in the middle position of the upper steel beam 13. At the same time, the lower limit wheel 14 is used to facilitate the movement of the lower steel beam 15 to the front and back sides. The movement of the lower steel beam 15 is used to place the booster hydraulic cylinder 16 in the middle position. The continuous extension of the booster hydraulic cylinder 16 applies pressure to the top of the pile foundation, thereby detecting the static load pressure of the pile foundation.

[0031] In this embodiment: the detection mechanism 2 includes a support plate 23, a pressure sensor 22 is fixed on the top of the support plate 23, a pad 21 is fixed on the top of the pressure sensor 22, the pad 21 is fixed to the bottom of the booster hydraulic cylinder 16, and the support plate 23 is provided with a displacement detection component for detecting the settlement of the pile foundation. The booster hydraulic cylinder 16 pushes the pad 21, the pressure sensor 22 and the support plate 23, and the pressure is transmitted to the pile foundation through the support plate 23. At the same time, the pressure sensor 22 is used to detect the pressure transmitted to the pile foundation.

[0032] In this embodiment: the displacement detection component includes a limiting plate 26, which is located outside the support plate 23. Four displacement sensors 27 are provided on the top of the support plate 23 near the limiting plate 26. Each displacement sensor 27 is fixed with a limiting plate 26, and each limiting plate 26 is fixed with four guide sleeves. The end of each limiting plate 26 away from the displacement sensor 27 is slidably connected to the guide sleeve. A screw 25 is rotatably connected inside the guide sleeve. The screw 25 is threadedly connected to the limiting plate 26. Before the static load test of the pile foundation, the limiting frame 24 is placed on the outside of the pile cap, so that the displacement sensor 27 at one end of the limiting plate 26 is above the support plate 23. At the same time, the screw 25 is rotated to drive the limiting plate 26 to move downward along the guide sleeve, and then the lower end of the displacement sensor 27 is pressed against the top of the support plate 23.

[0033] In this embodiment, the top of the lower steel beam 15 and the two I-beams 6 are each provided with two sets of counterweights 5, and the two sets of counterweights 5 are symmetrically arranged about the upper steel beam 13. By increasing or decreasing the counterweights 5 on the lower steel beam 15, sufficient downward pressure is provided to the top of the booster hydraulic cylinder 16 to prevent the top of the booster hydraulic cylinder 16 from moving upward when it extends.

[0034] In this embodiment: the moving mechanism 3 includes a moving steel frame 31, a rotating seat 35 rotatably connected to the bottom of the moving steel frame 31, a hydraulic motor 34 for driving the rotating seat 35 to rotate fixed inside the moving steel frame 31, a moving motor 37 fixed at the lower end of the rotating seat 35, a tire 36 fitted on the outside of the moving motor 37, two sets of moving hydraulic cylinders 32 fixed inside the moving steel frame 31, and the two sets of moving hydraulic cylinders 32 are symmetrically arranged about the hydraulic motor 34, a push plate 33 is provided on the lower side of the moving steel frame 31, the top of the push plate 33 is fixedly connected to the telescopic part of the two sets of moving hydraulic cylinders 32, and a center position of the push plate 33 is provided. The device has a through hole, and the rotating seat 35, tire 36, and moving motor 37 are all located in the through hole of the push plate 33. The hydraulic motor 34 inside the moving steel frame 31 drives the rotating seat 35 to rotate, thereby changing the moving direction of the tire 36. At the same time, the moving motor 37 drives the tire 36 to rotate, which in turn drives the moving steel frame 31 to move in multiple directions through the rotating seat 35. After moving to the appropriate position, the extension part of the moving hydraulic cylinder 32 pushes the push plate 33 downward, and the push plate 33 lifts the entire moving steel frame 31, thereby facilitating the stability of the entire device during testing.

[0035] Working principle: In use, first, the limiting frame 24 is placed on the outside of the pile cap to be inspected. At this time, the displacement sensor 27 at one end of the limiting plate 26 is removed. Then, the hydraulic motors 34 inside the multiple moving steel frames 31 drive the rotating seat 35 to rotate, so that the multiple tires 36 on the lower side of the I-beam 6 and the lower steel beam 15 face the same direction of movement. Subsequently, the moving motors 37 on the inner ring of the tires 36 drive them to rotate, thereby moving the lower steel beam 15, the two I-beams 6, and the upper steel beam 13 towards the pile cap. When the support plate 23 approaches the pile cap, the rotating part of the hydraulic motor 34 located on the lower side of the lower steel beam 15 drives the rotating seat 35 on its lower side to rotate, so that the tires 36... The direction of movement is consistent with that of the lower steel beam 15. Then, the moving motor 37 on the lower side of the lower steel beam 15 drives the tires 36, causing the moving steel frame 31 to move the lower steel beam 15 along the support 11, moving it forward and backward on both sides. This positions the two moving steel frames 31 at the bottom of the lower steel beam 15 on the front and rear sides of the pile foundation, ensuring the distance between the two moving steel frames 31 and the pile foundation is consistent. The above steps are then repeated to adjust the distance between the two I-beams 6 and the pile foundation, ensuring the distance between the two I-beams 6 and the pile foundation is consistent. Then, hydraulic oil is supplied to the moving hydraulic cylinders 32 within the multiple moving steel frames 31 via the hydraulic oil station 4. The telescopic parts of the moving hydraulic cylinders 32 push the jacking plate 33 downward. When the jacking plate... After the bottom of the push plate 33 contacts the ground, the moving hydraulic cylinder 32 extends continuously, lifting multiple moving steel frames 31 upwards, causing the tires 36 at the bottom of the moving steel frames 31 to leave the ground, thus completing the support of the lower steel beam 15 and the two I-beams 6. Then, multiple counterweights 5 can be placed on top of the two I-beams 6, keeping the multiple counterweights 5 parallel to the upper steel beam 13. In addition, the number of counterweights 5 can be appropriately increased or decreased according to the static load pressure required by the pile foundation. Subsequently, hydraulic oil is supplied to the booster hydraulic cylinder 16 through the hydraulic oil station 4. The extension part of the booster hydraulic cylinder 16 pushes the pad 21, pressure sensor 22 and support plate 23 downwards. When the bottom of the support plate 23 is reached... After the pile cap is abutted, the displacement sensors 27 on the four limiting plates 26 are reinstalled, and the displacement sensor 27 at one end of the limiting plate 26 is positioned above the support plate 23. Then, the screw 25 is rotated to drive the limiting plate 26 to move downward, so that the lower end of the displacement sensor 27 abuts against the top of the support plate 23. Subsequently, hydraulic oil is continuously supplied to the booster hydraulic cylinder 16, so that the booster hydraulic cylinder 16 pushes the pad 21, pressure sensor 22 and support plate 23 to apply static load pressure to the pile foundation. At this time, the pressure is detected in real time by the pressure sensor 22, and the displacement sensor 27 is used to detect the distance that the support plate 23 follows the pile foundation to settle after being compressed, so that the static load condition of the pile foundation can be obtained.

[0036] In addition, when the ground around the pile foundation is uneven, the extension length of the movable hydraulic cylinders 32 inside the multiple movable steel frames 31 can be adjusted according to the terrain, so that the multiple jacking plates 33 can support the ground at different heights, thereby putting the two I-beams 6 and the lower steel beam 15 on the same horizontal plane, thus eliminating the need for preparation work before the static load test of the pile foundation and shortening the preparation time before the test.

[0037] 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 claimed utility model.

Claims

1. A static load testing device for pile foundations, characterized in that: It includes a support mechanism (1) and a detection mechanism (2), wherein the detection mechanism (2) is located at the bottom center of the support mechanism (1), and a hydraulic oil station (4) is provided on the front side of the support mechanism (1); The support mechanism (1) includes a bracket (11), a booster hydraulic cylinder (16) is fixed at the bottom of the bracket (11), an upper steel beam (13) is provided on the upper side of the bracket (11), multiple upper limit wheels (12) are provided on the front and rear sides of the upper steel beam (13), I-beams (6) are fixed at the bottom of both ends of the upper steel beam (13), a lower steel beam (15) is provided on the lower side of the bracket (11), multiple lower limit wheels (14) are provided on both sides of the lower steel beam (15), and a moving mechanism (3) is provided at the front and rear ends of the lower steel beam (15) and at the bottom of the I-beam (6). The detection mechanism (2) includes a support plate (23), a pressure sensor (22) is fixed on the top of the support plate (23), a pad (21) is fixed on the top of the pressure sensor (22), the pad (21) is fixed at the bottom of the booster hydraulic cylinder (16), and a displacement detection component for detecting pile foundation settlement is provided on the support plate (23).

2. The pile foundation static load testing device according to claim 1, characterized in that: The upper limit wheel (12) is rotatably connected to the bracket (11), and each of the lower limit wheels (14) is rotatably connected to the bracket (11).

3. The pile foundation static load testing device according to claim 1, characterized in that: The displacement detection assembly includes a limiting plate (26), which is located outside the support plate (23). Four displacement sensors (27) are provided on the top of the support plate (23) near the limiting plate (26), and the limiting plate (26) is fixed on each displacement sensor (27).

4. The pile foundation static load testing device according to claim 3, characterized in that: Four guide sleeves are fixed on each of the limiting plates (26). The end of each limiting plate (26) away from the displacement sensor (27) is slidably connected in the guide sleeve. A screw (25) is rotatably connected in the guide sleeve. The screw (25) is threadedly connected to the limiting plate (26).

5. The pile foundation static load testing device according to claim 1, characterized in that: The lower steel beam (15) and the two I-beams (6) are each provided with two sets of counterweights (5), and the two sets of counterweights (5) are symmetrically arranged about the upper steel beam (13).

6. The pile foundation static load testing device according to claim 1, characterized in that: The moving mechanism (3) includes a moving steel frame (31), a rotating seat (35) is rotatably connected to the bottom of the moving steel frame (31), a hydraulic motor (34) for driving the rotating seat (35) to rotate is fixed inside the moving steel frame (31), a moving motor (37) is fixed at the lower end of the rotating seat (35), a tire (36) is fitted on the outside of the moving motor (37), two sets of moving hydraulic cylinders (32) are fixed inside the moving steel frame (31), and the two sets of moving hydraulic cylinders (32) are symmetrically arranged about the hydraulic motor (34). A push plate (33) is provided on the lower side of the moving steel frame (31), and the top of the push plate (33) is fixedly connected to the telescopic part of the two sets of moving hydraulic cylinders (32).

7. A static load testing device for pile foundations according to claim 6, characterized in that: The push plate (33) has a through hole at its center, and the rotating seat (35), the tire (36) and the moving motor (37) are all located in the through hole of the push plate (33).

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