A static load testing device for pile foundation detection

Abstract

The application discloses a static load test device for pile foundation detection, which comprises a test pile and a heavy platform support pier constructed on the ground, the heavy platform support pier has two and is respectively located on both sides of the test pile, a jack is arranged at the top end of the test pile, a main beam is arranged horizontally on the top of the jack, a secondary beam plate is arranged on the heavy platform support pier and the main beam, a plurality of sensing components for detecting the pressure of the upper counterweight are arranged on the secondary beam plate, a load adjusting plate is movably arranged on the top of the secondary beam plate, and the counterweight can be stacked on the load adjusting plate. The static load test device for pile foundation detection has the advantages that the overall stability is good, the counterweight can be adjusted in time according to the actual situation, and the use effect is ensured.

Description

Technical Field

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

[0002] The static load test of pile foundation is a technology used in engineering to detect the bearing capacity of pile foundation. It is the most accurate and reliable test method in determining the ultimate bearing capacity of a single pile. As a basis for judging whether a certain dynamic load test method is mature, the comparison error of the static load test results is used. Therefore, every foundation design and treatment code places the static load test of a single pile in the first place.

[0003] Current static load tests for pile foundations mainly include counterweight platform reaction devices, anchor pile beam reaction devices, anchor pile combined counterweight reaction devices, and ground anchor reaction devices. The components required for each type of static load test device are different, and their usage also differs considerably. However, all tests require balanced counterweights. Since counterweights are usually placed by hoisting and stacking, deviations are inevitable during placement, resulting in uneven counterweights. This leads to inaccurate test data and, in severe cases, even device collapse.

[0004] Chinese utility model patent publication number CN215165899U discloses a static load testing device for pile foundations, which includes a jack, a bearing platform, and counterweights. The jack is placed on top of the pile foundation. The bearing platform includes two opposing bearing walls. Several counterweights are arranged and placed on top of the two bearing walls and the jack. At least two positioning elements are fixedly connected to the bottom of one counterweight, and the top of another counterweight has positioning holes that correspond one-to-one with the positions of the positioning elements and are respectively inserted and mated with each positioning element. This patent is applicable when the counterweights are standard geometric shapes, such as water tanks or precast concrete blocks. If the counterweights are non-standard geometric shapes such as sandbags or stones, this device cannot guarantee that no deviation will occur. In addition, the load cannot be precisely controlled during the addition of counterweights, and it is impossible to determine whether the added load meets the requirements.

[0005] Therefore, it is necessary to provide a new static load testing device for pile foundation testing to solve the above-mentioned technical problems. Summary of the Invention

[0006] To address the technical problem that current hoisting and stacking methods are prone to counterweight deviations, leading to inaccurate test data, this invention provides a static load testing device for pile foundation testing.

[0007] The static load testing device for pile foundation testing provided by this invention includes: a test pile and a counterweight platform support built on the ground, wherein there are two counterweight platform supports symmetrically distributed on both sides of the test pile; a jack located at the top of the test pile; a main beam horizontally positioned on top of the jack and at the same height as the counterweight platform support; a secondary beam plate erected on the two counterweight platform supports and the main beam, wherein the secondary beam plate is provided with multiple sensing components for detecting the pressure of the upper counterweight; a load-bearing adjustment plate movably located on top of the secondary beam plate, wherein counterweights can be stacked on the load-bearing adjustment plate; a horizontal tensioning mechanism located between the two counterweight platform supports; and a hydraulic adjustment mechanism located on the side of the secondary beam plate and the load-bearing adjustment plate for cooperating with the multiple sensing components to adjust the position of the counterweight on the load-bearing adjustment plate.

[0008] Preferably, the lateral tensioning mechanism includes a lateral tension beam disposed between the two ballast platform supports, the lateral tension beam maintaining a certain distance from the secondary beam plate, and insert plates fixedly installed at both ends of the lateral tension beam, and card holders for inserting the insert plates fixedly installed on the inner sides of the two ballast platform supports.

[0009] Preferably, the hydraulic adjustment mechanism includes two bearing plate seats that are detachably installed at both ends of the secondary beam plate, and two hydraulic cylinders are hinged to the two bearing plate seats at both ends of the bearing adjustment plate.

[0010] Preferably, the bottom of the two bearing plate seats and the outer side of the corresponding counterweight platform support are respectively hinged with adjusting screws, and the adjusting screw at the bottom of each bearing plate seat and the adjusting screw on the outer side of the corresponding counterweight platform support are connected by adjusting bidirectional threaded sleeves.

[0011] Preferably, the sensing component includes a plurality of assembly openings evenly spaced along the length of the secondary beam plate. A detection port is provided at the top of the assembly opening. Multiple detection columns are movably installed in the detection port, with their tops contacting the bottom of the load-bearing adjustment plate. A drawer plate is slidably installed at the bottom of the assembly opening. A pressure sensor is detachably installed at the top of the drawer plate. A conduction frame is provided in the assembly opening between the bottom of the detection column and the sensing end of the pressure sensor.

[0012] Preferably, the two ends of the transmission frame are provided with L-shaped flanges, and guide studs are vertically slidably installed through the L-shaped flanges. The top end of the guide studs is threadedly connected to the top inner wall of the assembly port. A spring is slidably sleeved on the guide studs, and the spring is located between the nut of the guide studs and the L-shaped flanges.

[0013] Preferably, both sides of the draw plate are provided with inwardly recessed slots, and guide wheels are rotatably installed in the slots. The outer side of the guide wheels makes rolling contact with the inner wall of the assembly opening.

[0014] Preferably, the bearing adjustment plate has at least two parallel sides provided with anti-detachment tightening mechanisms in the same direction as the displacement of the hydraulic cylinder. The anti-detachment tightening mechanism includes two anti-detachment baffles that are detachably installed on the top sides of the bearing adjustment plate and cover the counterweight.

[0015] Preferably, both anti-detachment baffles are fitted with sliding sleeves, and multiple hanging ears are fixedly installed on the corresponding side of each of the two sliding sleeves. Hooks are hung on the hanging ears, and tightening steel cables are fixedly installed on the hooks. Tensioning screws are connected to both of the two tightening steel cables, and the same bidirectional screw frame is threaded onto the two tensioning screws.

[0016] Preferably, the insert plate and the card holder are connected by a bolt assembly, and the card holder is L-shaped.

[0017] Compared with related technologies, the static load testing device for pile foundation testing provided by this invention has the following advantages:

[0018] This invention provides a static load testing device for pile foundation testing:

[0019] 1. The basic structure of the static load test device consists of test piles, counterweight platform supports, jacks, main beams, and secondary beams. The upper load-bearing adjustment plate is used to stack counterweights. The horizontal tensioning mechanism can connect two independent counterweight platform supports to increase the overall resistance. The hydraulic adjustment mechanism works with the sensing components to adjust the position of the load-bearing adjustment plate according to the data readings of the sensing components, thereby accurately controlling the load and achieving the purpose of adjusting the counterweight. The horizontal tensioning mechanism can form a connection between the two independent counterweight platform supports, making them a whole, improving the compressive strength, and ensuring the normal operation of the test.

[0020] 2. The hydraulic adjustment mechanism can push the load-bearing adjustment plate to slide along the top of the secondary beam plate, thereby achieving the purpose of adjusting the counterweight, ensuring the balance of the device and avoiding accidents to a large extent. By adjusting the double-sided screw sleeve and the adjusting screw, a triangular support is formed between the load-bearing plate seat and the counterweight platform support, improving the load-bearing strength of the load-bearing plate seat. The sensing component can monitor the counterweight, and by integrating data from different positions, the position that needs adjustment is determined, achieving the purpose of automatic adjustment of the counterweight. The overall use effect is good. The removable plate can carry the pressure sensor out for easy removal during transportation. The detection port can be directly placed on the detection column for convenient transportation and adjustment. It is flexible in use. The transmission frame installed by the guide stud and spring can transmit the pressure of the detection column to the pressure sensor. The use of springs allows the transmission frame to be reset, and the guide stud also makes it easy to install and disassemble the transmission frame.

[0021] 3. The anti-detachment tightening mechanism forms support on the side of the counterweight, improving overall stability and preventing collapse caused by shaking during movement. The entire device can be disassembled and assembled for easy operation, and the components work together for better performance. Attached Figure Description

[0022] Figure 1 This is a front view schematic diagram of a preferred embodiment of the static load testing device for pile foundation testing provided by the present invention;

[0023] Figure 2 This is a front sectional view of a preferred embodiment of the static load testing device for pile foundation testing provided by the present invention.

[0024] Figure 3 for Figure 2 An enlarged structural diagram of part A shown in the figure;

[0025] Figure 4 for Figure 3 An enlarged structural diagram of part B shown in the figure;

[0026] Figure 5 for Figure 2 An enlarged structural diagram of section C shown in the figure;

[0027] Figure 6 for Figure 2 An enlarged structural diagram of part D shown in the figure;

[0028] Figure 7 for Figure 2 An enlarged structural diagram of part E shown in the figure;

[0029] Figure 8 for Figure 2 An enlarged structural diagram of part F shown in the figure;

[0030] Figure 9 This is a top view schematic diagram of the secondary beam plate and hydraulic adjustment mechanism in this invention;

[0031] Figure 10 This is a top view of the anti-loosening tightening mechanism in this invention.

[0032] Figure 11 for Figure 10 An enlarged structural diagram of part G shown in the figure;

[0033] Figure 12 This is a schematic diagram of the detection column in this invention;

[0034] Figure 13 This is a schematic diagram of the transmission frame in this invention.

[0035] The diagram labels are as follows: 1. Test pile; 2. Ballast platform support; 3. Jack; 4. Main beam; 5. Secondary beam; 6. Bearing adjustment plate; 7. Counterweight; 8. Horizontal tie beam; 9. Insert plate; 10. Card seat; 11. Bearing plate seat; 12. Hydraulic cylinder; 13. Two-way threaded sleeve; 14. Adjusting screw; 15. Assembly port; 16. Inspection port; 17. Inspection column; 18. Pull-out plate; 19. Pressure sensor; 20. Transmission frame; 21. Guide stud; 22. Spring; 23. Guide wheel; 24. Anti-detachment baffle; 25. Sliding sleeve; 26. Hanging lug; 27. Hook; 28. Tightening cable; 29. ​​Tensioning screw; 30. Two-way threaded frame. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Please refer to the following: Figures 1-13 ,in, Figure 1 This is a front view schematic diagram of a preferred embodiment of the static load testing device for pile foundation testing provided by the present invention; Figure 2 This is a front sectional view of a preferred embodiment of the static load testing device for pile foundation testing provided by the present invention. Figure 3 for Figure 2 An enlarged structural diagram of part A shown in the figure; Figure 4 for Figure 3 An enlarged structural diagram of part B shown in the figure; Figure 5 for Figure 2 An enlarged structural diagram of section C shown in the figure; Figure 6 for Figure 2 An enlarged structural diagram of part D shown in the figure; Figure 7 for Figure 2 An enlarged structural diagram of part E shown in the figure; Figure 8 for Figure 2 An enlarged structural diagram of part F shown in the figure; Figure 9 This is a top view schematic diagram of the secondary beam plate and hydraulic adjustment mechanism in this invention; Figure 10 This is a top view of the anti-loosening tightening mechanism in this invention. Figure 11 for Figure 10 An enlarged structural diagram of part G shown in the figure; Figure 12 This is a schematic diagram of the detection column in this invention; Figure 13 This is a schematic diagram of the transmission frame in this invention.

[0038] The static load testing device for pile foundation testing includes: a test pile 1 and two counterweight platform supports 2 constructed on the ground, the counterweight platform supports 2 being symmetrically distributed on both sides of the test pile 1; jacks 3 located at the top of the test pile 1; a main beam 4 horizontally positioned on top of the jacks 3 at the same height as the counterweight platform supports; a secondary beam 5 erected on the two counterweight platform supports 2 and the main beam 4, the secondary beam 5 being equipped with multiple sensing components for detecting the pressure of the upper counterweight; a load-bearing adjustment plate 6 movably located on top of the secondary beam 5, on which counterweights 7 can be stacked; and a horizontal tensioning mechanism. The horizontal tensioning mechanism is located between the two counterweight platform supports 2; the hydraulic adjustment mechanism is located on the side of the secondary beam plate 5 and the load-bearing adjustment plate 6 to cooperate with multiple sensing components to adjust the counterweight position of the load-bearing adjustment plate 6. The basic structure of the static load test device is formed by the test pile 1, the counterweight platform supports 2, the jacks 3, the main beam 4 and the secondary beam plate 5. The upper load-bearing adjustment plate 6 is used to stack the counterweight 7. The horizontal tensioning mechanism can connect the two independent counterweight platform supports 2 to increase the overall resistance. The hydraulic adjustment mechanism is used in conjunction with the sensing components to adjust the position of the load-bearing adjustment plate 6 according to the data reading value of the sensing components, thereby achieving the purpose of adjusting the counterweight.

[0039] The lateral tensioning mechanism includes a lateral tension beam 8 positioned between the two counterweight platform supports 2. The lateral tension beam maintains a certain distance from the secondary beam plate. Insert plates 9 are fixedly installed at both ends of the lateral tension beam 8. Card holders 10 for inserting the insert plates 9 are fixedly installed on the inner sides of both counterweight platform supports 2. The two lateral tension beams can be cross-distributed, with the intersection points connected by hinges, allowing relative movement between the two beams and enabling them to rotate or swing within a plane. This connection structure provides greater stability and flexibility and can withstand greater forces and torques. The lateral tensioning mechanism allows a connection to be formed between the two independent counterweight platform supports 2, making them a unified whole, improving compressive strength, and ensuring the normal operation of the test.

[0040] The hydraulic adjustment mechanism includes two bearing plate seats 11 detachably installed at both ends of the secondary beam plate 5. The two bearing plate seats 11 are hinged to the two ends of the bearing adjustment plate 6, and two hydraulic cylinders 12 are installed. Specifically, an end plate is fixedly connected to the end of the bearing plate seat away from the main beam. The end plate is connected to the cylinder body of the hydraulic cylinder. The piston rod of the hydraulic cylinder is hinged to the bearing adjustment plate. The hydraulic adjustment mechanism can push the bearing adjustment plate 6 to slide along the top of the secondary beam plate 5, thereby achieving the purpose of adjusting the counterweight, ensuring the balance of the device and avoiding accidents to a large extent.

[0041] The bottom of each of the two bearing plate seats 11 and the outer side of the corresponding counterweight platform support 2 are respectively hinged with adjusting screws. The adjusting screw at the bottom of each bearing plate seat and the adjusting screw on the outer side of the corresponding counterweight platform support are connected by adjusting bidirectional screw sleeves 13. The adjusting bidirectional screw sleeves 13 and adjusting screws 14 form a triangular support between the bearing plate seat 11 and the counterweight platform support 2, thereby improving the bearing strength of the bearing plate seat 11. The counterweight can be monitored by the sensing component.

[0042] The sensing component includes several assembly ports 15 evenly spaced along the length of the secondary beam plate. There are at least two assembly ports, symmetrically distributed about the center of the load-bearing adjustment plate, or three, one located at the center of the load-bearing adjustment plate and the other two symmetrically distributed about the center of the load-bearing adjustment plate. A detection port 16 is provided at the top of each assembly port 15. Multiple detection columns 17, whose tops are in contact with the bottom of the load-bearing adjustment plate 6, are movably installed in the detection port 16. A pull plate 18 is slidably installed at the bottom of the inner part of the assembly port 15. A pressure sensor 19 is detachably installed at the top of the pull plate 18. A transmission frame 20 is provided in the assembly port 15 between the bottom of the detection columns 17 and the sensing end of the pressure sensor 19. By integrating data from different positions, the position that needs adjustment is determined, achieving the purpose of automatic adjustment of the counterweight. The overall performance is better. The pull plate 18 can be removed with the pressure sensor 19, making it convenient to remove during transportation. The detection port 16 directly places the detection columns 17, making adjustment and transportation convenient and flexible in use.

[0043] The transmission frame 20 has L-shaped flanges at both ends. Guide studs 21 are vertically slidably installed through the L-shaped flanges. The top of the guide studs 21 is threaded to the top inner wall of the assembly port 15. A spring 22 is slidably sleeved on the guide studs 21. The spring 22 is located between the nut of the guide stud and the L-shaped flange. The transmission frame 20 installed by the guide studs 21 and the spring 22 can transmit the pressure of the detection column 17 to the pressure sensor 19. The use of the spring 22 allows the transmission frame 20 to be reset, and the guide studs 21 also facilitate the installation and disassembly of the transmission frame 20.

[0044] Both sides of the draw plate 18 are provided with inwardly recessed slots, and guide wheels 23 are rotatably installed in both slots. The outer side of the guide wheels 23 rolls in contact with the inner wall of the assembly port 15.

[0045] At least two parallel sides of the load-bearing adjustment plate 6 are provided with anti-detachment tightening mechanisms in the same direction as the displacement of the hydraulic cylinder 12. The anti-detachment tightening mechanism includes two anti-detachment baffles 24 that are detachably installed on the top two sides of the load-bearing adjustment plate 6 and cover the counterweight 7. By using the anti-detachment tightening mechanism, support is formed on the side of the counterweight 7, which improves the overall stability and avoids the collapse problem caused by shaking during movement.

[0046] Both anti-detachment baffles 24 are fitted with sliding sleeves 25. Multiple hanging ears 26 are fixedly installed on the corresponding side of the two sliding sleeves 25. Hooks 27 are hung on the hanging ears 26. Tightening steel cables 28 are fixedly installed on the hooks 27. Tensioning screws 29 are connected to the two tensioning steel cables 28. The same bidirectional screw frame 30 is threaded on the two tensioning screws 29.

[0047] The insert plate 9 and the card holder 10 are connected by a bolt assembly, and the card holder 10 is L-shaped.

[0048] This device can be disassembled and assembled as a whole, making it easy to operate. At the same time, the various components work together to achieve better results.

[0049] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0050] The working principle of the static load testing device for pile foundation testing provided by this invention is as follows:

[0051] In the specific implementation, test pile 1 and ballast platform support 2 are constructed, then jack 3 is hoisted and placed on test pile 1, and the horizontal tie beam 8 located between the two ballast platform supports 2 is installed to strengthen the overall anti-deviation strength. There are two horizontal tie beams 8, symmetrically located on both sides of jack 3, so that the insert plate 9 is inserted into the card seat 10 and fixed with bolt assembly.

[0052] Then, each component is assembled in sequence. During assembly, the main beam 4 is located on the jack 3, and the secondary beam 5 is erected on the counterweight platform support 2 and the main beam 4. The pull plate 18 carrying the pressure sensor 19 is inserted into the assembly port 15. It should be noted that the assembly port is exposed on the side of the secondary beam 5, so the pull plate can carry the pressure sensor and extend it in, so that the sensing end of the pressure sensor 19 contacts the transmission frame 20. Then, the detection column 17 is placed through the detection port 16. At this time, the load-bearing adjustment plate 6 is located on the secondary beam 5, and the counterweight 7 is hoisted and erected on the load-bearing adjustment plate 6. Then, the anti-detachment baffle 24 is installed on the load-bearing adjustment plate 6 to block the counterweight 7. Then, the sliding sleeve 25 is fitted on the anti-detachment baffle 24. Finally, the tensioning screw 29 is connected to the double-direction screw frame 30. The double-direction screw frame 30 is pried with a pry bar to tighten the tensioning screw 29, so that the tensioning cable 28 pulls the two anti-detachment baffles 24.

[0053] During use, as the upper counterweight 7 is added, the load-bearing adjustment plate 6 continuously presses against the detection column 17. The detection column 17 presses against the transmission frame 20 and the pressure sensor 19. At this time, the transmission frame 20 slides along the guide stud 21 and compresses the spring 22, thereby obtaining the pressure value. Based on this, it can be deduced whether the load meets the requirements. If the pressure values ​​of each pressure sensor are significantly different, it indicates that the center of gravity of the counterweight is unbalanced. Based on the pressure values ​​of the pressure sensor 19, it is determined which side of the hydraulic cylinder 12 needs to retract and the other side needs to extend, so that the load-bearing adjustment plate 6 slides along the secondary beam plate 5 until the detection values ​​of multiple pressure sensors 19 are within the error value.

[0054] Compared with related technologies, the static load testing device for pile foundation testing provided by this invention has the following advantages:

[0055] This invention provides a static load testing device for pile foundation testing. The basic structure of the static load testing device consists of a test pile 1, a counterweight platform support 2, a jack 3, a main beam 4, and a secondary beam 5. A load-bearing adjustment plate 6 is used to stack counterweights 7. A horizontal tensioning mechanism connects two independent counterweight platform supports 2, increasing overall strength. A hydraulic adjustment mechanism, used in conjunction with a sensing component, adjusts the position of the load-bearing adjustment plate 6 based on data readings from the sensing component, thereby adjusting the counterweight. The horizontal tensioning mechanism connects the two independent counterweight platform supports 2, making them a unified whole, improving compressive strength, and ensuring normal test operation. The hydraulic adjustment mechanism pushes the load-bearing adjustment plate 6 to slide along the top of the secondary beam 5, thus adjusting the counterweight and ensuring the device's balance, minimizing the risk of accidents. Adjusting the bidirectional screw sleeve 13 and the adjusting screw 14 on the load-bearing plate seat 11 and the counterweight... A triangular support is formed between the heavy platform piers 2, which improves the load-bearing strength of the bearing plate seat 11. The counterweight can be monitored by the sensing component. By integrating the data from different positions, the position that needs adjustment can be determined, so as to achieve the purpose of automatic adjustment of the counterweight. The overall use effect is good. The removable plate 18 can carry the pressure sensor 19 out for easy removal during transportation. The detection port 16 can be directly placed on the detection column 17 for convenient transportation and adjustment. It is flexible to use. The transmission frame 20 installed by the guide stud 21 and spring 22 can transmit the pressure of the detection column 17 to the pressure sensor 19. The use of spring 22 allows the transmission frame 20 to be reset. The guide stud 21 also facilitates the installation and disassembly of the transmission frame 20. The use of the anti-detachment tightening mechanism forms a support on the side of the counterweight 7, which improves the overall stability and avoids the collapse problem caused by shaking during movement. The whole device can be disassembled and assembled, which is convenient for operation. At the same time, the components work together to achieve good results.

[0056] It should be noted that the device structure and accompanying drawings of this invention mainly describe the principle of this invention. In terms of the technical aspects of this design principle, the configuration of the device's power mechanism, power supply system, and control system is not fully described. However, those skilled in the art who understand the principle of the invention can clearly understand the specifics of its power mechanism, power supply system, and control system.

[0057] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A static load testing device for pile foundation testing, characterized in that, include: The test piles and ballast platform supports are constructed on the ground, wherein there are two ballast platform supports symmetrically distributed on both sides of the test piles; A jack, which is located at the top of the test pile; The main beam is horizontally positioned on top of the jack and its height is consistent with that of the counterweight platform support. The secondary beam slab is erected on two counterweight platform supports and the main beam. The secondary beam slab is equipped with multiple sensing components for detecting the pressure of the upper counterweight. A load-bearing adjustment plate is movably located on top of the secondary beam plate, and counterweights are stacked on the load-bearing adjustment plate; A lateral tensioning mechanism is provided between the two counterweight platform supports; A hydraulic adjustment mechanism is provided on the side of the secondary beam plate and the load-bearing adjustment plate to cooperate with multiple sensing components to adjust the position of the load-bearing adjustment plate.

2. The static load testing device for pile foundation testing according to claim 1, characterized in that, The lateral tensioning mechanism includes a lateral tension beam disposed between the two ballast platform supports. The lateral tension beam and the secondary beam are spaced apart. Insert plates are fixedly installed at both ends of the lateral tension beam. Card holders for inserting the insert plates are fixedly installed on the inner sides of the two ballast platform supports.

3. The static load testing device for pile foundation testing according to claim 1, characterized in that, The hydraulic adjustment mechanism includes two bearing plate seats that are detachably installed at both ends of the secondary beam plate, and two hydraulic cylinders are hinged to the two bearing plate seats at both ends of the bearing adjustment plate.

4. The static load testing device for pile foundation testing according to claim 3, characterized in that, The bottom of each of the two bearing plate seats and the outer side of the corresponding counterweight platform support are respectively hinged with adjusting screws. The adjusting screw at the bottom of each bearing plate seat and the adjusting screw on the outer side of the corresponding counterweight platform support are connected by a bidirectional adjusting sleeve thread.

5. The static load testing device for pile foundation testing according to claim 1, characterized in that, The sensing component includes several assembly ports evenly spaced along the length of the secondary beam plate. A detection port is provided at the top of each assembly port. Multiple detection columns are movably installed in the detection ports, with their tops contacting the bottom of the load-bearing adjustment plate. A drawer plate is slidably installed at the bottom of the assembly port. A pressure sensor is detachably installed at the top of the drawer plate. A conduction frame is provided in the assembly port between the bottom of the detection columns and the sensing end of the pressure sensor.

6. The static load testing device for pile foundation testing according to claim 5, characterized in that, The transmission frame has L-shaped flanges at both ends. Guide studs are vertically slidably installed through the L-shaped flanges. The top of the guide studs is threaded to the top inner wall of the assembly port. A spring is slidably sleeved on the guide studs. The spring is located between the nut of the guide studs and the L-shaped flanges.

7. The static load testing device for pile foundation testing according to claim 5, characterized in that, Both sides of the draw plate are provided with inwardly recessed slots, and guide wheels are rotatably installed in the slots. The outer side of the guide wheels makes rolling contact with the inner wall of the assembly port.

8. The static load testing device for pile foundation testing according to claim 3, characterized in that, The bearing adjustment plate has at least two parallel sides provided with anti-detachment tightening mechanisms in the same direction as the displacement of the hydraulic cylinder. The anti-detachment tightening mechanism includes two anti-detachment baffles that are detachably installed on the top sides of the bearing adjustment plate and cover the counterweight.

9. The static load testing device for pile foundation testing according to claim 8, characterized in that, Both anti-detachment baffles are fitted with sliding sleeves, and multiple hanging ears are fixedly installed on the corresponding side of each of the two sliding sleeves. Hooks are hung on the hanging ears, and tightening steel cables are fixedly installed on the hooks. Tensioning screws are connected to both of the two tightening steel cables, and the same bidirectional screw frame is threaded onto the two tensioning screws.

10. The static load testing device for pile foundation testing according to claim 2, characterized in that, The insert plate and the card holder are connected by a bolt assembly, and the card holder is "L" shaped.

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