Photovoltaic PHC pipe pile horizontal static load test device

Abstract

The utility model discloses a photovoltaic PHC pipe pile horizontal static load test device, including two parts of oil pressure loading system and displacement measurement system, and the oil pressure loading system is fastened on the counterforce pile through the support platform of adjustable flexible hoop, and the displacement measurement system acts on the test pile surface through the ground type steel drill. The oil pressure loading system includes support platform, groove type magnetic cushion, horizontal jack, radian spherical hinge, guide rail wheel and other parts, and the displacement measurement system includes adjustable steel drill, displacement sensor and the like. The support platform is fastened on the counterforce pile through adjustable flexible hoop, and the horizontal jack is placed in the positioning screw rod of support platform, and high strength steel strand passes through test pile, the magnetic cushion groove above support platform and both sides guide rail wheel, horizontal jack and the like in proper order, and the high strength steel strand is connected in a loop by using steel strand anchor, and the high strength steel strand is in the tensile state through the pressure of oil pump to horizontal jack. Effectively solve the counterforce installation difficulty in the test process, the horizontal jack slip in the test and other problems, and the device has the advantages of strong integrity, easy operation, convenient carrying, convenient and efficient test process and accurate test result.

Description

Technical Field

[0001] This utility model relates to the field of engineering quality testing technology, and in particular to a horizontal static load test device for photovoltaic PHC pipe piles. Background Technology

[0002] The climate characteristics of Northwest my country are mainly characterized by longer periods of low temperatures and strong winds compared to other regions. As the core foundation component of photovoltaic arrays, photovoltaic (PV) piles directly affect the stability and durability of the system due to their resistance to lateral loads. In complex environments such as strong winds and freeze-thaw cycles, PV piles must withstand horizontal loads for extended periods. Therefore, testing their horizontal bearing capacity is a crucial aspect of design and construction. Currently, single-pile horizontal static load testing remains the most direct and reliable method for detecting horizontal bearing capacity. However, PV piles differ significantly from engineering piles in building construction or other projects, especially in Northwest China: firstly, PV piles are primarily PHC pipe piles; secondly, construction sites are mainly sparsely populated mountainous and desert areas, resulting in harsh construction environments; and thirdly, PV piles have high requirements for pile top rotation angle and inclination. Traditional testing devices often require counterweights for reaction forces, placing high demands on the testing site and being unsuitable for measuring pile top rotation angles. Applying these devices to horizontal static load tests of PV PHC pipe piles often leads to significant deviations in test results and poses certain safety hazards. Therefore, for the horizontal static load test of photovoltaic PHC pipe piles, especially in the Northwest region, the complex test environment is a challenge for the testing equipment. The portability and practicality of the testing equipment and supporting facilities are the prerequisites for ensuring the smooth conduct of the test and the safety of the test personnel, and are also the foundation for ensuring the accuracy of the test results. Summary of the Invention

[0003] Considering the complexity and variability of the testing environment for photovoltaic PHC pipe piles, and in order to obtain effective and reliable test results, meet the requirements of complex environments, and reduce testing costs and safety risks, this utility model provides a photovoltaic PHC pipe pile horizontal static load testing device. By improving the overall integrity and convenience of the device and optimizing the previously cumbersome operation process, it solves two major technical problems in the practical operation of photovoltaic PHC pipe pile horizontal static load testing in complex environments: the inability to use counterweights or other reaction devices and the inaccuracy of reading pile top rotation angle data. This significantly improves and ensures testing efficiency and the personal safety of test personnel, and significantly enhances the reliability of test results.

[0004] The technical objective of the aforementioned photovoltaic PHC pipe pile horizontal static load test device is achieved through the following technical solution: A photovoltaic PHC pipe pile horizontal static load test device includes a hydraulic loading system and a displacement measurement system. The hydraulic loading system includes an adjustable flexible clamp, a strut, and a support platform, which are installed on the reaction pile. The support platform is provided with an arc-shaped ball joint, a guide wheel, a horizontal jack, a positioning screw, a grooved magnetic pad, and a guide wheel positioning hole.

[0005] The displacement measurement system includes a displacement sensor, a steel rod, and a sensor fixing rod, and is set on one side of the test pile. The displacement measurement system is directly anchored into the soil through the steel rod; the reaction pile is at a certain distance from the test pile.

[0006] The support platform is fastened to the reaction pile by an adjustable flexible clamp. The horizontal jack is placed between the positioning screws, and the grooved magnetic pad is adsorbed onto the tail of the horizontal jack. The arc-shaped ball joint is connected to the head of the horizontal jack. A high-strength steel strand of appropriate length is passed through the test pile, the groove of the magnetic pad on the support platform, the guide wheels on both sides, and the horizontal jack in sequence. Then, the high-strength steel strand is connected end to end by an anchor. The height of the contact position between the high-strength steel strand and the test pile is adjusted so that it is the same height as the guide wheel.

[0007] The displacement sensor is fixed to two steel rods by sensor fixing rods. The distance between the two steel rods is adjusted according to the length of the sensor fixing rods so that the steel rods are tightly anchored to the soil.

[0008] Furthermore, the support platform and the strut are rigidly connected, and the adjustable flexible clamp is connected to the support platform and the strut by screws.

[0009] Furthermore, the positioning screws and guide wheels are mounted on the support platform and can be disassembled at any time; there are two guide wheels, symmetrically mounted on both sides of the grooved magnetic pad; there are four positioning screws, symmetrically mounted in pairs on both sides of the horizontal jack; relative to the support platform, the height of the guide wheels should be consistent with the groove height of the grooved magnetic pad.

[0010] Furthermore, the guide wheel and the support platform are connected by a high-strength alloy screw. The guide wheel and the high-strength alloy screw are rigidly connected. The high-strength alloy screw can be screwed into or out of the support platform, which is convenient for disassembly and easy to carry. The positioning screw spacing can be adjusted by changing the position of the positioning hole of the guide wheel to meet the installation of horizontal jacks of different diameters.

[0011] Furthermore, there are two sensor fixing rods and two steel rods. The steel rods are cylindrical with a pointed end. The sensor fixing rod end has two circular through holes with a diameter slightly larger than the diameter of the steel rod, allowing the sensor fixing rod to slide along the axis of the steel rod after passing through the two steel rods respectively. After the sensor fixing rod is installed in the test position, it can be fixed with a wing bolt.

[0012] Furthermore, the sensor fixing rod has a circular through hole in the middle for the displacement sensor to pass through. After the displacement sensor is installed in the required position, it can be fixed to the sensor fixing rod with a wing bolt.

[0013] Furthermore, rubber gaskets are installed between the arc-shaped end of the arc-shaped ball joint and the reaction pile, and between the high-strength steel strand and the test pile.

[0014] Furthermore, the flexible clamp is equipped with a pin buckle, which can be adjusted in length and locked after fitting with the reaction pile body, so that the support platform is perpendicular to the axis of the reaction pile after installation.

[0015] This utility model provides a horizontal static load test device for photovoltaic PHC pipe piles, which has the following beneficial effects:

[0016] 1. The hydraulic loading system fixes the support platform to the reaction pile through struts and flexible clamps. The flexible clamps with pin buckles can accommodate reaction piles of different diameters. The perpendicularity of one leg of the strut to the support platform ensures that the platform plane is perpendicular to the axis of the reaction pile after the jack is installed on the support platform. The positioning screw, the grooved magnetic pad connected to the tail and top of the jack, the ball joint with one end being arc-shaped, and the rubber pad placed between the arc surface of the ball joint and the reaction pile can ensure that the horizontal jack can smoothly apply horizontal force during the test and that the force of the jack passes horizontally through the axis of the pile.

[0017] 2. In the displacement measurement system of this utility model, one end of the steel rod is pointed, which can be easily and quickly anchored into the soil. The sensor fixing rod can slide after the steel rod passes through and can be fixed with a butterfly bolt. It can quickly and accurately adjust the sensor to a suitable position to meet the measurement of the pile top rotation angle. Attached Figure Description

[0018] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings;

[0019] Figure 1 This is a schematic diagram of the overall installation of the photovoltaic PHC pipe pile horizontal static load test device of this utility model;

[0020] Figure 2 This is a side view of the hydraulic loading system of the photovoltaic PHC pipe pile horizontal static load test device of this utility model;

[0021] Figure 3 This is a side view of the displacement measurement system of the photovoltaic PHC pipe pile horizontal static load test device of this utility model;

[0022] In the diagram: 1. Screw; 2. Adjustable flexible clamp; 3. Support rod; 4. Arc ball joint; 5. Guide wheel; 6. Horizontal jack; 7. Positioning screw; 8. Support platform; 9. Grooved magnetic pad; 10. High-strength steel strand; 11. Wing bolt; 12. Displacement sensor; 13. Steel rod; 14. Anchor; 15. Reaction pile; 16. Test pile; 17. Guide wheel positioning hole; 18. Sensor fixing rod; 19. High-strength alloy screw; 20. Pin buckle; 21. Rubber gasket. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] As shown in Figures 1 and 2, a photovoltaic PHC pipe pile horizontal static load test device includes a hydraulic loading system and a displacement measurement system. The hydraulic loading system includes an adjustable flexible clamp 2, a strut 3 and a support platform 8, which are set on the reaction pile 15.

[0025] The support platform 8 is equipped with an arc-shaped ball joint 4, a guide wheel 5, a horizontal jack 6, a positioning screw 7, a grooved magnetic pad 9, and a guide wheel positioning hole 17; the support platform 8, the strut 3, the guide wheel 5, and the positioning screw 7 are all made of high-strength alloy. The support platform 8 is rigidly connected to the strut 3. The reaction pile 15 is at a certain distance from the test pile 16.

[0026] The adjustable flexible clamp 2 is connected to the support platform 8 and the strut 3 by screws 1. The support platform 8 is fastened to the reaction pile 15 by the adjustable flexible clamp 2, which ensures that the plane of the support platform is always perpendicular to the axis of the reaction pile. The horizontal jack 6 is placed between the positioning screws 7, the grooved magnetic pad 9 is attached to the tail of the horizontal jack 6, and the arc-shaped ball joint 4 is connected to the head of the horizontal jack 6.

[0027] The positioning screw 7 and guide wheel 5 are mounted on the support platform 8 and can be disassembled at any time; there are two guide wheels 5, which are symmetrically mounted on both sides of the grooved magnetic pad 9; there are four positioning screws 7, which are symmetrically mounted in pairs on both sides of the horizontal jack 6; relative to the support platform 8, the height of the guide wheel 5 should be consistent with the height of the groove of the grooved magnetic pad 9, and the direction of the groove should be parallel to the support platform 8.

[0028] The displacement measurement system includes a displacement sensor 12, a steel rod 13, and a sensor fixing rod 18, which is set on one side of the test pile 16. The displacement measurement system is directly anchored into the soil through the steel rod 13. The displacement sensor 12 is fixed to the two steel rods 13 through the sensor fixing rod 18. The distance between the two steel rods 13 is adjusted according to the length of the sensor fixing rod 18 so that the steel rods 13 are tightly anchored in the soil.

[0029] The guide wheel 5 is connected to the support platform 8 by a high-strength alloy screw 19. The guide wheel 5 and the high-strength alloy screw 19 are rigidly connected. The high-strength alloy screw 19 can be screwed into or out of the support platform 8, which is convenient for disassembly and easy to carry. The positioning screw 7 can be adjusted by changing the position of the positioning hole 17 of the guide wheel according to the diameter of different specifications of horizontal jacks, so as to meet the installation of horizontal jacks 6 of different diameters.

[0030] There are two sensor fixing rods 18 and two steel rods 13. The steel rods 13 are cylindrical with a pointed end. The sensor fixing rods 18 have two circular through holes with a diameter slightly larger than that of the steel rods 13, allowing the sensor fixing rods 18 to slide along the axis of the steel rods 13 after passing through the two steel rods 13 respectively. After the sensor fixing rods 18 are installed in the test position, they can be fixed with butterfly bolts 11.

[0031] The sensor fixing rod 18 has a circular through hole in the middle for the displacement sensor 12 to pass through. After the displacement sensor 12 is installed in the required position, it can be fixed to the sensor fixing rod 18 with a wing bolt 11.

[0032] Through the above technical solution, the steel rod 13 can be quickly driven into the soil. By adjusting the butterfly bolt 11, the tightness between the steel rod 13 and the sensor fixing rod 18, and between the sensor fixing rod 18 and the displacement sensor 12 can be controlled, so as to quickly adjust the distance between the two displacement sensors and accurately make the sensor contact the test pile 16.

[0033] Rubber pads 21 are installed between the arc-shaped end of the arc-shaped ball joint 4 and the reaction pile 15, and between the high-strength steel strand 10 and the test pile 16. This helps to increase the friction of the steel strand on the test pile and keep the contact position between the steel strand and the test pile unchanged throughout the test.

[0034] The flexible clamp 2 is equipped with a pin buckle 20, which can be adjusted in length and locked after fitting with the reaction pile 15, so that the support platform 8 is perpendicular to the axis of the reaction pile 15 after installation.

[0035] Before the test, the flexible clamp 2, strut 3, and support platform 8 are connected by screws 1. The support platform 8 is secured to the reaction pile 15 using the flexible clamp 2. The positioning screws 7 are symmetrically installed on the support platform 8 in pairs. The horizontal jack 6 is placed inside the positioning screws 7 of the support platform 8. A high-strength steel strand 10 of appropriate length is threaded through the test pile 16, the groove of the magnetic pad 9 on the support platform 8, the guide wheels 5 on both sides, and the horizontal jack 6. The contact height between the high-strength steel strand 10 and the test pile 16 is adjusted so that it is the same height as the guide wheels 5. The horizontal jack 6 is pressurized by an oil pump to put the high-strength steel strand 10 into a tensile state. The steel rod 13 is anchored into the soil. After the sensor fixing rod 18 is installed in the test position, it is fixed to the steel rod 13 with a wing bolt 11. Finally, the displacement sensor 12 is installed and fixed, and the test begins.

[0036] During the test, when the horizontal jack 6 cylinder is pushed out, the steel strand 10 can just get stuck in the groove of the grooved magnetic pad 9. The arc-shaped end of the arc-shaped ball joint 4 is conducive to fitting against the reaction pile 15, increasing the contact area with the reaction pile 15.

Claims

1. A photovoltaic PHC pipe pile horizontal static load test device, characterized in that, It includes a hydraulic loading system and a displacement measurement system. The hydraulic loading system includes an adjustable flexible clamp (2), a strut (3) and a support platform (8), which are set on the reaction pile (15). The support platform (8) is equipped with an arc ball joint (4), a guide wheel (5), a horizontal jack (6), a positioning screw (7), a grooved magnetic pad (9), and a guide wheel positioning hole (17). The displacement measurement system includes a displacement sensor (12), a steel rod (13), and a sensor fixing rod (18), which is set on one side of the test pile (16). The displacement measurement system is directly anchored into the soil through the steel rod (13); the reaction pile (15) is a certain distance away from the test pile (16). The adjustable flexible clamp (2) is connected to the support platform (8) and the strut (3) by screws (1). The support platform (8) is fastened to the reaction pile (15) by the adjustable flexible clamp (2) and the strut (3). The horizontal jack (6) is placed between the positioning screws (7). The grooved magnetic pad (9) is adsorbed on the tail of the horizontal jack (6). The arc ball joint (4) is connected to the head of the horizontal jack (6). The high-strength steel strand (10) of appropriate length is passed through the test pile (16), the groove of the magnetic pad (9) on the support platform (8) and the guide wheels (5) on both sides, and the reaction pile (15) in sequence. Then, the high-strength steel strand (10) is connected end to end by the anchor (14). The contact height between the high-strength steel strand (10) and the test pile (16) is adjusted so that it is the same height as the guide wheel (5). The displacement sensor (12) is fixed to two steel rods (13) by the sensor fixing rod (18). The distance between the two steel rods (13) is adjusted according to the length of the sensor fixing rod (18) so that the steel rods (13) are tightly anchored to the soil.

2. The photovoltaic PHC pipe pile horizontal static load test device as described in claim 1, characterized in that: The positioning screw (7) and guide wheel (5) are installed on the support platform (8) and can be disassembled at any time; there are two guide wheels (5), which are symmetrically installed on both sides of the grooved magnetic pad (9); there are four positioning screws (7), which are symmetrically installed on both sides of the horizontal jack (6); relative to the support platform (8), the groove of the magnetic pad (9) is parallel to the support platform (8), and the height of the guide wheel (5) should be consistent with the groove height of the grooved magnetic pad (9).

3. The photovoltaic PHC pipe pile horizontal static load test device as described in claim 2, characterized in that: The guide wheel (5) and the support platform (8) are connected by a high-strength alloy screw (19). The guide wheel (5) and the high-strength alloy screw (19) are rigidly connected. The high-strength alloy screw (19) can be screwed into or out of the support platform (8), which is convenient for disassembly and easy to carry. The positioning screw (7) can be adjusted by changing the position of the positioning hole (17) of the guide wheel to meet the installation of horizontal jacks (6) of different diameters.

4. The photovoltaic PHC pipe pile horizontal static load test device as described in claim 1, characterized in that: There are two sensor fixing rods (18) and two steel rods (13). The steel rods (13) are cylindrical with a pointed end. The sensor fixing rods (18) have two circular through holes with a diameter slightly larger than that of the steel rods (13) at their ends. The sensor fixing rods (18) can slide along the axis of the steel rods (13) after passing through the two steel rods (13). After the sensor fixing rods (18) are installed in the test position, they can be fixed with the steel rods (13) using wing bolts (11).

5. The photovoltaic PHC pipe pile horizontal static load test device as described in claim 4, characterized in that: The sensor fixing rod (18) has a circular through hole in the middle for the displacement sensor (12) to pass through. After the displacement sensor (12) is installed in the required position, it can be fixed to the sensor fixing rod (18) with a wing bolt (11).

6. The photovoltaic PHC pipe pile horizontal static load test device as described in claim 1, characterized in that: Rubber pads (21) are installed between the arc-shaped end of the arc-shaped ball joint (4) and the reaction pile (15), and between the high-strength steel strand (10) and the test pile (16).

7. The photovoltaic PHC pipe pile horizontal static load test device as described in claim 1, characterized in that: The support platform (8) is rigidly connected to the strut (3), and the adjustable flexible clamp (2) is connected to the support platform (8) and the strut (3) by screws (1); the adjustable flexible clamp (2) is equipped with a pin buckle (20), which can be adjusted at will and locked after fitting with the pile body of the reaction pile (15), so that the support platform (8) is perpendicular to the axis of the reaction pile (15) after installation.

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