A method for detecting the strength of a pile foundation

Abstract

The application discloses a pile foundation strength detection method, and particularly relates to the technical field of pile foundation detection, and comprises the following steps: step one: drilling a core sample, positioning the sampling position, then installing a sampling cylinder with a proper diameter, then aiming the sampling cylinder of the core drilling machine at the sampling position, then starting the machine to rotate and extrude the sampling cylinder into the pile foundation, and sampling the pile foundation; step two: core sample processing; step three: size measurement; and step four: compression resistance detection. The application measures the distance from the laser diameter measuring instrument to the positioning plate, that is, the diameter of the core sample, and measures the height of the core sample by attaching the moving plate to the top of the core sample, then measures the angle between the top of the core sample and the generatrix by the angle disc and the indicating plate, so that the size of the core sample is quickly measured and recorded, the measurement operation steps of the user are reduced, the error caused by manual measurement is reduced, and the accuracy of the pile foundation strength detection result is ensured.

Description

Technical Field

[0001] This invention relates to the field of pile foundation testing technology, and more specifically, to a method for testing the strength of pile foundations. Background Technology

[0002] Core drilling is a type of pile foundation testing. This method is scientific, intuitive, and practical, and is widely used in testing cast-in-place concrete piles. A complete and successful core drilling test can obtain information on pile length, concrete strength, pile bottom sediment thickness, and pile integrity, and determine or identify the soil and rock properties of the bearing stratum at the pile tip. Core extraction technology has a significant impact on the testing and judgment.

[0003] Furthermore, when using the core drilling method to test pile foundations, after grinding and leveling both ends of the core sample, it is necessary to measure and record the dimensions of the core sample. However, existing technologies typically use a vernier ruler to manually measure the diameter and height of the core sample, and an angle measuring ruler to measure the angle of the core sample. There is no comprehensive dimensional measurement mechanism, which makes the operation cumbersome for users. In addition, manual measurement can lead to large errors, which will affect the test results. Therefore, it is necessary to propose a new method for testing pile foundation strength. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a method for testing the strength of pile foundations. Through the arrangement of a diameter measuring component, a diameter measuring instrument, and a height measuring component, when measuring a core sample, the core sample is directly placed on top of a rotating plate. The diameter measuring component moves to align the diameter measuring instrument with the edge of the core sample. When the diameter measuring instrument is activated, the distance from the measuring instrument to the positioning plate, i.e., the diameter of the core sample, can be measured using a laser. By attaching the moving plate to the top of the core sample, the height measuring instrument measures the height of the core sample. Then, the angle between the top of the core sample and the generatrix is ​​measured using an angle dial and an indicator plate. This allows for rapid measurement and recording of the core sample's dimensions, reduces the user's measurement steps, minimizes errors caused by manual measurement, and ensures the accuracy of the pile foundation strength testing results, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for testing the strength of pile foundations, comprising the following steps:

[0006] Step 1: Drill core samples. Locate the sampling position, then install a sampling tube of appropriate diameter. Next, align the sampling tube of the core drill with the sampling position, then turn on the machine to rotate and squeeze the sampling tube into the pile foundation to collect the pile foundation sample.

[0007] Step 2: Core sample processing. Use a grinder to grind the two sides of the core sample flat, and then use epoxy putty or polymer cement mortar to fill and level the two sides of the core sample.

[0008] Step 3: Size measurement. Place the core sample on top of the rotating assembly, and then measure the diameter of the core sample using the diameter measuring assembly and diameter measuring instrument. Next, rotate the core sample 90 degrees by rotating the rotating assembly to measure the average diameter of the core sample. Then, measure the height and angle of the core sample using the height measuring assembly.

[0009] Step 4: Compression test. Place the core sample inside the testing machine and then continuously apply load. When the specimen is close to failure and begins to deform rapidly, stop and adjust the throttle of the testing machine, and then record the failure load.

[0010] In a preferred embodiment, the rotating assembly includes a rotating plate, and rotating columns are symmetrically mounted on the bottom of the rotating plate. A fixing block is fixedly connected to the outer wall of the rotating column, and a ball bearing is rotatably mounted on the bottom end of the rotating column. A baffle is pressed and disposed on one side of the fixing block, and a base plate is fixedly connected to the bottom of the baffle.

[0011] In a preferred embodiment, an electric push rod is fixedly installed on the top of the base plate, and a rack is fixedly connected to one end of the telescopic rod of the electric push rod. A gear is meshed on one side of the rack, and a central column is fixedly connected to the inner wall of the gear.

[0012] The top of the base plate has an annular groove, and baffles are symmetrically arranged on the sides of the annular groove. The central column is rotatably installed on the top of the base plate and is fixedly connected to the bottom of the rotating plate.

[0013] In a preferred embodiment, the diameter measuring component includes a drive motor, and a threaded rod is fixedly connected to one end of the drive motor's shaft. A threaded block is threadedly connected to the outer wall of the threaded rod, and a movable frame is fixedly installed on the top of the threaded block. A fixed cylinder is fixedly connected to one side of the movable frame, and a fixed spring is fixedly installed inside the fixed cylinder.

[0014] In a preferred embodiment, a movable rod is fixedly connected to one end of the fixed spring, and a movable conductive block is fixedly connected to the outer wall of the movable rod. A fixed conductive block is attached to one side of the movable conductive block, and the fixed conductive block is fixedly connected to the inner side of the movable frame. One end of the movable rod is movably disposed inside the movable frame, and the other end of the movable rod is movably disposed inside the fixed cylinder.

[0015] In a preferred embodiment, both the movable conductive block and the fixed conductive block are fixedly connected to the drive motor via connecting lines, and a support plate is fixedly installed on the outside of the drive motor. The support plate is fixedly installed on the bottom of the base plate, and the threaded block is movably disposed inside the base plate.

[0016] The diameter measuring instrument is fixedly installed on the top inner wall of the mobile frame, and both ends of the threaded rod are rotatably connected to limit plates, which are fixedly installed on the bottom of the base plate.

[0017] In a preferred embodiment, a fixing frame is fixedly connected to the top side of the base plate, and a positioning plate is fixedly connected to the top side of the fixing frame. The positioning plate is horizontally positioned on one side of the diameter measuring instrument.

[0018] In a preferred embodiment, the height measuring component includes a side plate, and a movable plate is movably disposed on the inner side of the side plate. A screw is threadedly connected to one side of the movable plate, and a height measuring instrument is fixedly installed on the top side of the movable plate. A slider is movably connected to one side of the movable plate.

[0019] In a preferred embodiment, an angle disk is fixedly mounted on the top of the slider, an indicator plate is rotatably connected to one side of the angle disk, and the side plate is fixedly mounted on the top side of the base plate.

[0020] In a preferred embodiment, the screw is rotatably mounted on the top of the base plate, the screw is rotatably mounted inside the side plate, and the moving plate is vertically mounted on the top of the rotating plate, and the height measuring instrument is vertically mounted on the top of the rotating plate.

[0021] The technical effects and advantages of this invention are as follows:

[0022] By incorporating components such as a diameter measuring assembly, a diameter measuring instrument, and a height measuring assembly, the core sample is placed directly on top of a rotating plate during core sample measurement. The diameter measuring assembly moves to align the diameter measuring instrument with the edge of the core sample. When the diameter measuring instrument is activated, the distance from the measuring instrument to the positioning plate, which is the diameter of the core sample, is measured using a laser. By attaching the moving plate to the top of the core sample, the height measuring instrument measures the height of the core sample. The angle between the top of the core sample and the generatrix is ​​then measured using an angle dial and an indicator plate. This allows for rapid measurement and recording of the core sample's dimensions, reduces the user's measurement steps, minimizes errors caused by manual measurement, and ensures the accuracy of the pile strength test results.

[0023] By using the rotating component, it is convenient to measure the diameter of one side of the core sample. Then, the electric push rod drives the rack and pinion to rotate the central column, thereby rotating the rotating plate and the core sample by 90 degrees. This allows the diameter measuring instrument to be used again to measure the vertical diameter of the core sample, thus obtaining the average diameter of the core sample. This makes the measurement data more standardized and avoids the need for the user to manually adjust the core sample, making it more convenient for the user to operate.

[0024] By using the diameter measuring component and the diameter measuring instrument together, when measuring the diameter of the core sample, the drive motor drives the threaded rod to rotate, thereby moving the threaded block and the moving frame. The movement of the moving frame also moves the moving rod towards one side of the core sample until the moving rod is pressed against one side of the core sample. The moving rod is then pressed into the moving frame and moves, and then the moving conductive block is moved towards the fixed cylinder, thereby separating the moving conductive block and the fixed conductive block. This causes the drive motor to be de-energized and stopped, allowing the moving frame to be accurately positioned. This facilitates the accurate and automatic measurement of the core sample diameter, thereby improving the flexibility of the measurement structure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the process of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the position and structure of the fixing frame of the present invention;

[0028] Figure 4 This is a schematic diagram of the position and structure of the diameter measuring instrument of the present invention;

[0029] Figure 5 This is a schematic diagram of the diameter measuring component of the present invention;

[0030] Figure 6 This is a schematic diagram showing the disassembled structure of the diameter measuring component of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the rotating component of the present invention;

[0032] Figure 8 This is a schematic diagram of the height measuring component of the present invention.

[0033] The attached figures are labeled as follows: 1. Rotating assembly; 11. Rotating plate; 12. Rotating column; 13. Fixed block; 14. Ball bearing; 15. Baffle; 16. Electric push rod; 17. Rack; 18. Gear; 19. Center column; 2. Diameter measuring assembly; 21. Drive motor; 22. Threaded rod; 23. Threaded block; 24. Moving frame; 25. Fixed cylinder; 26. Fixed spring; 27. Moving rod; 28. Moving conductive block; 29. ​​Fixed conductive block; 3. Diameter measuring instrument; 4. Base plate; 5. Support plate; 6. Fixed frame; 7. Positioning plate; 8. Height measuring assembly; 81. Side plate; 82. Screw; 83. Moving plate; 84. Height measuring instrument; 85. Slider; 86. Angle disk; 87. Indicator plate. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] according to Figure 1-8 The pile foundation strength testing method shown includes the following steps:

[0036] Step 1: Drill core samples. Locate the sampling position, then install a sampling tube of appropriate diameter. Next, align the sampling tube of the core drill with the sampling position, then turn on the machine to rotate and squeeze the sampling tube into the pile foundation to collect the pile foundation sample.

[0037] Step 2: Core sample processing. Use a grinder to grind the two sides of the core sample flat, and then use epoxy putty or polymer cement mortar to fill and level the two sides of the core sample.

[0038] Step 3: Size measurement. Place the core sample on top of the rotating assembly 1, and then measure the diameter of the core sample using the diameter measuring assembly 2 and the diameter measuring instrument 3. Next, rotate the core sample 90 degrees by rotating the rotating assembly 1 to measure the average diameter of the core sample. Then, measure the height and angle of the core sample using the height measuring assembly 8.

[0039] Step 4: Compression test. Place the core sample inside the testing machine and then continuously apply load. When the specimen is close to failure and begins to deform rapidly, stop and adjust the throttle of the testing machine, and then record the failure load.

[0040] according to Figure 2 , Figure 3 and Figure 7 The pile foundation strength testing method shown includes a rotating component 1 comprising a rotating plate 11, and rotating columns 12 symmetrically installed at the bottom of the rotating plate 11. A fixing block 13 is fixedly connected to the outer wall of the rotating column 12, and a ball bearing 14 is rotatably installed at the bottom end of the rotating column 12. A baffle 15 is pressed and provided on one side of the fixing block 13, and a bottom plate 4 is fixedly connected to the bottom of the baffle 15.

[0041] An electric push rod 16 is fixedly installed on the top of the base plate 4, and a rack 17 is fixedly connected to one end of the telescopic rod of the electric push rod 16. A gear 18 is meshed on one side of the rack 17, and a central column 19 is fixedly connected to the inner wall of the gear 18.

[0042] The top of the base plate 4 is provided with an annular groove, and the baffles 15 are symmetrically arranged on the side of the annular groove. The central column 19 is rotatably installed on the top of the base plate 4, and the central column 19 is fixedly connected to the bottom of the rotating plate 11.

[0043] The specific implementation method is as follows: by setting and using the rotating component 1, it is convenient to measure the diameter of one side of the core sample. Then, the electric push rod 16 pushes the rack 17 to drive the gear 18 to rotate the central column 19, thereby rotating the rotating plate 11 to rotate the core sample by ninety degrees.

[0044] This allows for the reuse of the diameter measuring instrument 3 to measure the vertical diameter of the core sample, thereby obtaining the average diameter of the core sample. This makes the measurement data more standardized and avoids the need for users to manually adjust the core sample, thus making it more convenient for users to operate.

[0045] according to Figure 2-6 The pile foundation strength testing method shown includes a diameter measuring component 2 comprising a drive motor 21, and a threaded rod 22 is fixedly connected to one end of the shaft of the drive motor 21. A threaded block 23 is threadedly connected to the outer wall of the threaded rod 22, and a movable frame 24 is fixedly installed on the top of the threaded block 23. A fixed cylinder 25 is fixedly connected to one side of the movable frame 24, and a fixed spring 26 is fixedly installed inside the fixed cylinder 25.

[0046] One end of the fixed spring 26 is fixedly connected to a movable rod 27, and a movable conductive block 28 is fixedly connected to the outer wall of the movable rod 27. A fixed conductive block 29 is attached to one side of the movable conductive block 28, and the fixed conductive block 29 is fixedly connected to the inner side of the movable frame 24. One end of the movable rod 27 is movable inside the movable frame 24, and the other end of the movable rod 27 is movable inside the fixed cylinder 25.

[0047] Both the movable conductive block 28 and the fixed conductive block 29 are fixedly connected to the drive motor 21 via connecting lines, and a support plate 5 is fixedly installed on the outside of the drive motor 21. The support plate 5 is fixedly installed on the bottom of the base plate 4, and the threaded block 23 is movably disposed inside the base plate 4.

[0048] The diameter measuring instrument 3 is fixedly installed on the top inner wall of the movable frame 24. Both ends of the threaded rod 22 are rotatably connected to limit plates, and the limit plates are fixedly installed on the bottom of the base plate 4.

[0049] The specific implementation method is as follows: When measuring the diameter of the core sample, the drive motor 21 drives the threaded rod 22 to rotate, thereby moving the threaded block 23 to move the moving frame 24. The movement of the moving frame 24 simultaneously moves the moving rod 27 to one side of the core sample until the moving rod 27 is pressed against one side of the core sample and then moves inside the moving frame 24.

[0050] Then, the movable conductive block 28 is moved toward the fixed cylinder 25, thereby separating the movable conductive block 28 and the fixed conductive block 29, causing the drive motor 21 to be de-energized and stopped, thus enabling the movable frame 24 to be accurately positioned, thereby facilitating the accurate and automatic measurement of the core sample diameter and improving the flexibility of the measurement structure.

[0051] according to Figure 8 The pile foundation strength testing method shown has a fixed frame 6 fixedly connected to the top side of the base plate 4, and a positioning plate 7 fixedly connected to the top side of the fixed frame 6. The positioning plate 7 is horizontally set on one side of the diameter measuring instrument 3.

[0052] The height measuring component 8 includes a side plate 81, and a movable plate 83 is movably disposed on the inner side of the side plate 81. A screw 82 is threadedly connected to one side of the movable plate 83, and a height measuring instrument 84 is fixedly installed on the top side of the movable plate 83. A slider 85 is movably connected to one side of the movable plate 83.

[0053] An angle plate 86 is fixedly installed on the top of the slider 85, and an indicator plate 87 is rotatably connected to one side of the angle plate 86. The side plate 81 is fixedly installed on the top side of the base plate 4.

[0054] The screw 82 is rotatably mounted on the top of the base plate 4, the screw 82 is rotatably mounted inside the side plate 81, and the moving plate 83 is vertically mounted on the top of the rotating plate 11, and the height measuring instrument 84 is vertically mounted on the top of the rotating plate 11.

[0055] The specific implementation method is as follows: When measuring the core sample, the core sample is placed directly on the top of the rotating plate 11. Then, the diameter measuring instrument 3 is aligned with the side of the core sample by moving the diameter measuring component 2. When the diameter measuring instrument 3 is turned on, the distance from the diameter measuring instrument 3 to the positioning plate 7 can be measured by laser, which is the diameter of the core sample.

[0056] By attaching the movable plate 83 to the top of the core sample, the height measuring instrument 84 measures the height of the core sample. Then, the angle between the top of the core sample and the generatrix is ​​measured by the angle plate 86 and the indicator plate 87. This allows for quick measurement and recording of the core sample's dimensions, reduces the user's measurement operation steps, and minimizes errors caused by manual measurement, thus ensuring the accuracy of the pile strength test results.

[0057] The working principle of this invention is as follows: After drilling the core sample, the two sides of the core sample are ground and leveled. Then, the core sample is placed on the top of the rotating plate 11, and one side of the core sample is placed against one side of the fixed frame 6. Then, the drive motor 21 is turned on and used. Then, the drive motor 21 drives the threaded rod 22 to rotate. Then, the threaded block 23 drives the moving frame 24 to move. When the moving frame 24 moves, it drives the moving rod 27 and the fixed cylinder 25 and other structures at the same time.

[0058] Then the moving rod 27 is moved to one side of the core sample. After the moving rod 27 moves to one side of the core sample, it is squeezed and moved by the core sample. This causes the moving rod 27 to move the moving conductive block 28 to one side of the fixed cylinder 25, so that the moving conductive block 28 and the fixed conductive block 29 are separated. This de-energizes the drive motor 21 and stops it, so that the diameter measuring instrument 3 is positioned on one side of the core sample, and the diameter measuring instrument 3 is on the horizontal line of the outermost side of the core sample.

[0059] Meanwhile, the fixing frame 6 and the positioning plate 7 are on the horizontal line on the other side of the core sample, so that the diameter of the diameter measuring instrument 3 can be directly measured after the diameter measuring instrument 3 is turned on and used. Then the measured data is broadcast by voice, which makes it convenient for the user to record the data. Then the drive motor 21 is controlled to drive the moving frame 24 to reset. Then the electric push rod 16 pushes the rack 17 forward, so that the rack 17 drives the gear 18 to drive the central column 19 to rotate, so that the rotating plate 11 drives the core sample at the top to rotate ninety degrees.

[0060] Furthermore, the rotating column 12 slides inside the annular groove via the ball bearing 14, thereby facilitating the rotation of the rotating plate 11. Meanwhile, the fixed block 13 moves inside the baffle 15, blocking and limiting the rotation through the baffle 15, thus controlling the rotating plate 11 to rotate 90 degrees. Then, the above measurement method is repeated to measure the vertical diameter of the core sample, and then the average diameter of the core sample is calculated. Next, the screw 82 is turned to move the moving plate 83 inside the side plate 81.

[0061] Then, the height measuring instrument 84 is moved downwards. After the moving plate 83 is attached to the top of the core sample, the height measuring instrument 84 measures the distance between the moving plate 83 and the rotating plate 11, thereby measuring the height of the core sample. Then, the slider 85 slides inside the moving plate 83, so that one side of the indicator plate 87 contacts the side of the core sample. Then, by rotating the indicator plate 87, the angle between the top surface of the core sample and the generatrix is ​​viewed, which facilitates multi-faceted measurement and recording of the core sample.

[0062] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0063] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0064] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for testing the strength of pile foundations, characterized in that, Includes the following steps: Step 1: Drill core samples. Locate the sampling position, then install a sampling tube of appropriate diameter. Next, align the sampling tube of the core drill with the sampling position, then turn on the machine to rotate and squeeze the sampling tube into the pile foundation to collect the pile foundation sample. Step 2: Core sample processing. Use a grinder to grind both sides of the core sample flat, and then use epoxy putty or polymer cement mortar to fill and level both sides of the core sample. Step 3: Size measurement. Place the core sample on top of the rotating assembly (1), and then measure the diameter of the core sample using the diameter measuring assembly (2) and the diameter measuring instrument (3). Next, rotate the core sample ninety degrees by rotating the rotating assembly (1) to measure the average diameter of the core sample. Then, measure the height and angle of the core sample using the height measuring assembly (8). Step 4: Compression test. Place the core sample inside the testing machine and then continuously apply load. When the specimen is close to failure and begins to deform rapidly, stop adjusting the throttle of the testing machine and then record the failure load. The diameter measuring component (2) includes a drive motor (21), and a threaded rod (22) is fixedly connected to one end of the shaft of the drive motor (21). A threaded block (23) is threadedly connected to the outer wall of the threaded rod (22), and a movable frame (24) is fixedly installed on the top of the threaded block (23). A fixed cylinder (25) is fixedly connected to one side of the movable frame (24), and a fixed spring (26) is fixedly installed inside the fixed cylinder (25). A movable rod (27) is fixedly connected to one end of the fixed spring (26), and a movable conductive block (28) is fixedly connected to the outer wall of the movable rod (27). A fixed conductive block (29) is attached to one side of the movable conductive block (28), and the fixed conductive block (29) is fixedly connected to the inner side of the movable frame (24). One end of the movable rod (27) is movably disposed inside the movable frame (24). The other end of the moving rod (27) is moved and set inside the fixed cylinder (25). The moving conductive block (28) and the fixed conductive block (29) are both fixedly connected to the drive motor (21) through the connecting line. The support plate (5) is fixedly installed on the outside of the drive motor (21). The support plate (5) is fixedly installed at the bottom of the base plate (4). The threaded block (23) is moved and set inside the base plate (4). The diameter measuring instrument (3) is fixedly installed on the top inner wall of the moving frame (24). Both ends of the threaded rod (22) are rotatably connected to the limit plate. The limit plate is fixedly installed at the bottom of the base plate (4). The top side of the base plate (4) is fixedly connected to the fixed frame (6). The top side of the fixed frame (6) is fixedly connected to the positioning plate (7). The positioning plate (7) is horizontally set on one side of the diameter measuring instrument (3).

2. The method for testing the strength of pile foundations according to claim 1, characterized in that: The rotating assembly (1) includes a rotating plate (11), and rotating columns (12) are symmetrically installed at the bottom of the rotating plate (11). A fixing block (13) is fixedly connected to the outer wall of the rotating column (12), and a ball bearing (14) is rotatably installed at the bottom end of the rotating column (12). A baffle (15) is pressed on one side of the fixing block (13), and a base plate (4) is fixedly connected to the bottom of the baffle (15).

3. The pile foundation strength testing method according to claim 2, characterized in that: An electric push rod (16) is fixedly installed on the top of the base plate (4), and a rack (17) is fixedly connected to one end of the telescopic rod of the electric push rod (16). A gear (18) meshes on one side of the rack (17), and a central column (19) is fixedly connected to the inner wall of the gear (18). The bottom plate (4) has an annular groove at the top, and baffles (15) are symmetrically arranged on the side of the annular groove. The central column (19) is rotatably installed on the top of the bottom plate (4), and the central column (19) is fixedly connected to the bottom of the rotating plate (11).

4. The method for testing the strength of pile foundations according to claim 1, characterized in that: The height measuring component (8) includes a side plate (81), and a movable plate (83) is movably disposed on the inner side of the side plate (81). A screw (82) is threadedly connected to one side of the movable plate (83), and a height measuring instrument (84) is fixedly installed on the top side of the movable plate (83). A slider (85) is movably connected to one side of the movable plate (83).

5. The pile foundation strength testing method according to claim 4, characterized in that: An angle plate (86) is fixedly installed on the top of the slider (85), and an indicator plate (87) is rotatably connected to one side of the angle plate (86). The side plate (81) is fixedly installed on the top side of the base plate (4).

6. The pile foundation strength testing method according to claim 4, characterized in that: The screw (82) is rotatably mounted on the top of the base plate (4), the screw (82) is rotatably mounted inside the side plate (81), and the moving plate (83) is vertically mounted on the top of the rotating plate (11), and the height measuring instrument (84) is vertically mounted on the top of the rotating plate (11).

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