Device and method for detecting pile-forming quality of cast-in-place bored pile

Abstract

The present application discloses a bored pile quality detection device and method, belongs to the technical field of bored pile quality detection, and aims to solve the problems that the device cannot automatically and quickly control the pressure and clamp on the pile foundation, and cannot integrally detect the thickness and uniformity of the pile foundation during detection.The device comprises an annular fixing seat, a U-shaped support rod arranged on the top of the annular fixing seat, a pile top impact detection assembly arranged on the top of the U-shaped support rod, and an anti-wear vertical guide assembly arranged between the pile top impact detection assembly and the inner side wall of the U-shaped support rod.A ring-shaped plate is arranged on the lower middle part of the U-shaped support rod, a lifting drive assembly is arranged at the center of the top of the ring-shaped plate, a rotary drive assembly is arranged on the side of the top of the ring-shaped plate away from the U-shaped support rod, a connecting rod is arranged at the bottom of the rotary drive assembly, a multi-stage electric push rod is arranged at the bottom of the connecting rod, a connecting seat is arranged at the extending end of the multi-stage electric push rod, and a dial indicator is arranged at the bottom of the connecting seat.

Description

Technical Field

[0001] This invention relates to the field of pile quality testing technology, specifically to a device and method for testing the quality of bored piles. Background Technology

[0002] Drilled cast-in-place piles are one type of pile foundation. After the piles are poured, their quality needs to be tested. There are several methods for testing pile foundations, including core drilling, low-stress testing, high-stress testing, and ultrasonic transmission. When testing cast-in-place piles using the high-stress testing method, the existing testing equipment is directly erected on top of the pile. Since the ground is not hardened when testing the piles, the testing equipment is prone to tilting during operation. This not only affects the accuracy of the test but also increases the risk of safety accidents. Therefore, during testing, the testing equipment is often clamped to the top of the outer side of the pile foundation to form a single unit before impact testing to ensure that it does not shift during testing.

[0003] Existing borehole pile foundation quality testing devices generally use four adjusting screws to adjust four arc-shaped fixing frames that are clamped in the middle on the upper outer side of the pile foundation for simple impact testing. This method has the following shortcomings:

[0004] ① It cannot automatically and quickly control the pressure and clamp the pile foundation. Personnel need to adjust each pile individually on all four sides, resulting in low connection and fixing efficiency and low degree of automation.

[0005] ② It cannot measure the thickness of the pile foundation in one go during the inspection. Its function is limited. The quality inspection of the pile foundation also requires inspection of the rear side. The thickness needs to be measured separately by personnel.

[0006] ③ It cannot detect the uniformity of the pile foundation perimeter during the inspection. Personnel need to use a separate support frame and equipment to check for eccentricity or unevenness. Its function is limited and cannot meet the needs of rapid and multi-directional overall inspection. Summary of the Invention

[0007] The technical objective of this invention is to provide a device and method for testing the quality of bored cast-in-place piles, in order to solve the problems of not being able to automatically and quickly control the pressure and clamp the piles on the foundation, and not being able to detect the thickness and circumferential uniformity of the pile foundation in one go during testing.

[0008] The technical task of the present invention is achieved in the following manner: a drilling and grouting pile pile quality testing device, including an annular fixed seat, a U-shaped support rod provided on the top of the annular fixed seat, a pile top impact testing component provided on the top of the U-shaped support rod, and an anti-wear vertical guide component provided between the pile top impact testing component and the inner sidewall of the U-shaped support rod.

[0009] A ring plate is fitted onto the lower part of the U-shaped support rod. A lifting drive assembly is located at the top center of the ring plate, and a rotation drive assembly is located on the side of the top of the ring plate away from the U-shaped support rod. A connecting rod is located at the bottom of the rotation drive assembly, and a multi-stage electric push rod is located at the bottom of the connecting rod. A connecting seat is located at the extended end of the multi-stage electric push rod. A dial indicator is located at the bottom of the connecting seat, and a pressure testing and contact testing assembly is located at the telescopic detection end of the dial indicator. A pile thickness testing assembly is located at the upper part of the middle of the connecting seat.

[0010] At the four corners of the bottom of the annular plate, there is an inclined connecting rod. Two connecting rods are symmetrically arranged opposite each other. The bottom of the connecting rod is hinged to a pressure control and reinforcement component. The annular fixing seat is fitted onto the four pressure control and clamping components.

[0011] A PLC controller is installed on one outer wall of the U-shaped support rod. The PLC controller is equipped with an alarm light and is electrically connected to the pile top impact detection component, the anti-wear vertical guide component, the lifting drive component, the rotation drive component, the pressure testing and bonding detection component, the cast-in-place pile thickness detection component, and the pressure control and reinforcement component.

[0012] Preferably, the pile top impact detection assembly includes a brake motor and two supports arranged parallel to each other on the top of the U-shaped support. The brake motor is electrically connected to the PLC controller and the base end of the brake motor is installed on the top of the U-shaped support. The output end of the brake motor is provided with a winding shaft, which is located between the two supports and is rotatably connected to the two supports through a rotating shaft. A suspension rope is wound around the middle of the winding shaft, and the bottom end of the suspension rope extends into the U-shaped support, with a pile top impact detection hammer head provided at the bottom end of the suspension rope.

[0013] Preferably, the anti-wear vertical guide assembly includes two parallel vertical guide rods, the upper end of which is fixed to the inner wall of the top of the U-shaped support rod, and the lower end of which extends to the lower part of the middle of the U-shaped support rod; a horizontal bar is provided between the two vertical guide rods, and guide sleeves are provided at both ends of the horizontal bar. Anti-wear balls are evenly and movably nested on the inner wall of the guide sleeves, and the vertical guide rod is located between the anti-wear balls and is in movable contact with the anti-wear balls.

[0014] Preferably, the lifting drive assembly includes an annular plate, which is slidably sleeved on the lower middle part of the U-shaped support rod, and a U-shaped rod is provided on the top of the annular plate. The two ends of the U-shaped rod extend through the top of the U-shaped support rod to the upper side of the annular plate. A multi-stage electric telescopic rod is provided on one side of the top of the U-shaped support rod. The multi-stage electric telescopic rod is electrically connected to the PLC controller, and the extended end of the multi-stage electric telescopic rod is fixedly connected to the inner side of the top of the U-shaped rod.

[0015] Preferably, the rotary drive assembly includes a drive motor. The base end of the drive motor is installed at the lower middle part of the inner wall of the U-shaped rod. The output end of the drive motor is provided with a gear, which meshes with an external gear ring. The external gear ring is located at the top of the annular plate, and a connecting rod is provided on one side of the bottom of the external gear ring. One end of the connecting rod is fixedly connected to the top of the external gear ring, and the other end of the connecting rod is provided with a multi-stage electric push rod. The multi-stage electric push rod is electrically connected to the PLC controller, and the extended end of the multi-stage electric push rod is provided with a connecting seat.

[0016] Preferably, the pile thickness detection assembly includes an ultrasonic thickness gauge embedded and fixed on one side of the connector. A detection probe is electrically connected to one side of the ultrasonic thickness gauge via a flexible wire. A first electric push rod electrically connected to a PLC controller is fixedly installed on the top of the ultrasonic thickness gauge. The extended end of the first electric push rod is fixedly connected to the detection probe. A tactile limit switch electrically connected to the PLC controller is fixedly installed on one side of the top of the detection probe.

[0017] Preferably, the pressure control and reinforcement assembly includes an arc-shaped clamp plate hinged to the bottom end of the corresponding connecting rod. All four arc-shaped clamp plates are located within the annular fixed seat. Two opposite arc-shaped clamp plates are symmetrically arranged. Anti-slip rubber is glued and fixed to the adjacent side of the two opposite arc-shaped clamp plates. A first pressure sensor is embedded and fixed to the adjacent side of the two opposite arc-shaped clamp plates. The anti-slip rubber is movably sleeved on the corresponding first pressure sensor. All four first pressure sensors are electrically connected to the PLC controller. Two horizontal guide rods are fixedly connected to the opposing side of the two opposite arc-shaped clamp plates. The annular fixed seat is slidably sleeved on eight horizontal guide rods. Tension springs are fixedly connected between the opposing side of the two opposite arc-shaped clamp plates and the inner wall of the annular fixed seat.

[0018] More preferably, the pressure testing and contact detection assembly includes a movable rod fixedly connected to the telescopic detection end of a dial indicator. Multiple first ball bearings are movably nested on the side of the movable rod away from the dial indicator. A horizontal tube with a sealing end is fixedly connected to one side of the connecting seat. A T-shaped guide rod is slidably fitted inside the horizontal tube. One end of the T-shaped guide rod extends outside the horizontal tube and is fixedly connected to one side of the movable rod. A second pressure sensor located inside the horizontal tube is fixedly installed on one side of the connecting seat. A spring is fixedly connected between the second pressure sensor and the T-shaped guide rod. The second pressure sensor is electrically connected to the PLC controller.

[0019] Preferably, the four sides of the annular fixing seat are fixedly connected to support components. The support components include support seats. The four sides of the annular fixing seat are respectively fixedly connected to the corresponding support seats. An electric hydraulic rod is embedded and fixedly installed on the top of the support seat. The extended end of the electric hydraulic rod extends to the bottom of the corresponding support seat and is fixedly connected to a support foot. The bottom of the support foot is glued and fixedly fixed with anti-slip rubber.

[0020] A method for inspecting the quality of bored cast-in-place piles, the method is as follows:

[0021] S1. Using an external crane, place the ring-shaped fixed seat on the outside of the pile foundation of the cast-in-place pile. Start the four electric hydraulic rods in the positive direction to drive the four legs to move downward and contact the ground outside the pile foundation for support.

[0022] S2. Based on the clamping requirements, the PLC controller is used to pre-set the closing pressure value of the multi-stage electric telescopic rod. The multi-stage electric telescopic rod is started in reverse to drive the U-shaped rod to move downward. The U-shaped rod drives the four connecting rods through the ring plate to squeeze and drive the four arc-shaped clamping plates to retract and move towards the center. The arc-shaped clamping plates drive the corresponding horizontal guide rod to move and the tension spring to stretch. The four arc-shaped clamping plates drive the four anti-slip rubber sheets to clamp the pile foundation in the center, and drive the four first pressure sensors to squeeze the pile foundation in the center. The first pressure sensors detect the squeezing force and transmit the pressure value to the PLC controller. When the preset value is reached, the PLC controller controls the multi-stage electric telescopic rod to close automatically, realizing integrated automatic and rapid pressure clamping on the pile foundation from four directions.

[0023] S3. Start the brake motor in the forward direction. The brake motor drives the winding shaft to rotate quickly in the forward direction to release the hoisting rope. Under the action of gravity, the pile top impact test hammer falls rapidly downward and performs impact test on the top of the pile foundation. The pile top impact test hammer moves downward through two horizontal bars and two guide sleeves. The guide sleeves drive the corresponding eight anti-wear balls to slide downward against the vertical guide rod, so as to realize the vertical guidance and anti-deviation of the pile top impact test hammer.

[0024] S4. The PLC controller is used to pre-set the closing pressure value of the multi-stage electric push rod. The multi-stage electric push rod is started in the forward direction. The multi-stage electric push rod drives the connecting seat to move to the right. The connecting seat drives the dial indicator and the horizontal tube to move to the right. When the extension detection end of the dial indicator moves the first ball through the moving rod to contact the outside of the pile foundation, it is blocked and restricted by the pile foundation. The connecting seat continues to move to the right, which drives the second pressure sensor to compress the spring to the right. The second pressure sensor detects the tension spring force and transmits it to the PLC controller. When the preset value is reached, the PLC controller controls the multi-stage electric push rod to close, realizing the pressure control and tension of the moving rod and the first ball.

[0025] S5. After the moving rod is tightened by controlled pressure, the PLC controller starts the drive motor. The drive motor drives the external gear ring to rotate via gears. The external gear ring drives the dial indicator to rotate around the pile foundation via the connecting rod, multi-stage electric push rod, and connecting seat. The dial indicator drives the first ball bearing to rotate around the outside of the pile foundation via the moving rod. When there is a slight inward or outward unevenness on the outside of the pile foundation, when rotating at the inward concave part, the elastic force of the spring in the compressed state drives the moving rod to move a part away from the connecting seat through the T-shaped guide rod. The moving rod drives the telescopic detection end of the dial indicator to move a part outward. The measurement values ​​are changed. When the device moves to the convex position, the convex part will squeeze the first ball and move it towards the connecting seat. The first ball drives the dial indicator's telescopic detection end and the T-shaped guide rod to move to the left through the moving rod. The T-shaped guide rod increases the compression of the spring. Whether it is convex or concave, it will change the compression of the spring, thereby changing the pressure value detected by the second pressure sensor. When the pressure value changes from the set control pressure value, the PLC controller controls the alarm light to turn on to remind personnel that the pile foundation is uneven or eccentric, thus realizing the integrated detection of the uniformity of the pile foundation.

[0026] S6. In the forward start, the first electric push rod drives the detection probe to move to the right. When the detection probe moves to the right and contacts the side of the pile foundation, it drives the light-touch limit switch to move to the right and press against the outside of the pile foundation. The light-touch limit switch is pressed and a stop signal is transmitted to the PLC controller. The PLC controller controls the first electric push rod to automatically close. The ultrasonic thickness gauge performs ultrasonic detection through the detection probe that is in contact with the pile foundation and displays the thickness of the pile foundation, realizing integrated detection of the pile foundation thickness.

[0027] The borehole pile quality testing device and method of the present invention have the following advantages:

[0028] (I) The present invention, through the combination of a ring-shaped fixed seat, a U-shaped support rod, a ring plate, a PLC controller, a lifting drive assembly, a connecting rod and a pressure-controlled clamping assembly, can automatically and quickly control the closing pressure value of the multi-stage electric telescopic rod from four directions according to the clamping requirements by using the PLC controller to control the clamping pressure value. This eliminates the need to adjust the clamping on each of the four sides individually, improving the connection and fixing efficiency and ease of use. It has significant improvements in terms of convenience, speed, accuracy, stability and fast clamping.

[0029] (II) The present invention, through the U-shaped support rod, anti-wear vertical guide component, brake motor, winding shaft, lifting rope and pile top impact detection hammer, can provide anti-wear vertical guidance for the pile top impact detection hammer and drive the pile top impact detection hammer to fall quickly to perform stable anti-deviation impact detection work on the pile foundation of cast-in-place piles.

[0030] (III) The present invention, through the combination of a drive motor, a rotary drive assembly, a connecting rod, a connecting seat, a multi-stage electric push rod, an alarm light, a dial indicator, and a pressure testing and bonding detection assembly, can detect the uniformity of the pile foundation periphery during testing and provide alarm reminders when there is unevenness or eccentricity. It eliminates the need for personnel to separately set up supports and periphery uniformity detection equipment to detect whether there is concave or convexity or eccentricity. It has rich functions and improves the comprehensiveness of testing.

[0031] (iv) The present invention, through the set pile thickness detection component, can quickly detect the pile foundation thickness in one go during the detection, further improving the comprehensiveness of the detection. By detecting the uniformity and thickness of the periphery in one go during impact testing, the function is rich and meets the overall rapid multi-directional detection needs. It saves the time of setting up additional supports and multiple separate detection equipment. It has the significant improvement effect of saving time while increasing the number of detection items. It has the significant improvement and innovation effect of application and greatly improves work efficiency.

[0032] (v) The present invention, through the set support components, allows for flexible adjustment of the support height for testing according to the on-site testing conditions;

[0033] (vi) The present invention is reasonably designed and facilitates automatic and rapid pressure clamping of the pile foundation from four directions, improving connection and fixing efficiency and ease of use. It facilitates stable anti-eccentric impact testing of the pile foundation of cast-in-place piles, and facilitates the integrated detection of the uniformity and thickness of the pile foundation perimeter during testing. It can also automatically alarm and remind personnel when there is uneven eccentricity on the perimeter. It has rich functions and meets the needs of rapid multi-directional testing. It saves the time of setting up additional supports and multiple separate testing equipment. It has the significant improvement effect of saving time while improving the comprehensiveness of testing, thus improving work efficiency.

[0034] Therefore, this invention has the characteristics of reasonable design, simple structure, easy processing, small size, convenient use, and multiple uses, and thus has great value for promotion and use. Attached Figure Description

[0035] The invention will be further described below with reference to the accompanying drawings.

[0036] Appendix Figure 1 This is a schematic diagram of the structure of Example 1;

[0037] Appendix Figure 2 For the appendix Figure 1 A schematic diagram of the cross-sectional structure;

[0038] Appendix Figure 3 For the appendix Figure 2 Enlarged structural diagram of section A;

[0039] Appendix Figure 4 For the appendix Figure 2Enlarged structural diagram of section B;

[0040] Appendix Figure 5 For the appendix Figure 2 Enlarged structural diagram of section C;

[0041] Appendix Figure 6 This is a schematic diagram of the structure of Example 2;

[0042] Appendix Figure 7 For the appendix Figure 6 A schematic diagram of the cross-sectional structure.

[0043] In the diagram: 1. Annular fixed seat; 2. U-shaped support rod; 3. Support; 4. Rewind shaft; 5. Lifting rope; 6. Pile top impact detection hammer; 7. Brake motor; 8. Horizontal bar; 9. Vertical guide rod; 10. Guide sleeve; 11. Anti-wear ball bearings; 12. Annular plate; 13. U-shaped rod; 14. Multi-stage electric telescopic rod; 15. PLC controller; 16. Alarm light; 17. Connecting rod; 18. Arc-shaped clamp; 19. Anti-slip rubber; 20. First pressure sensor; 21. Tension spring; 22. 23. Horizontal guide rod; 24. External gear ring; 25. Gear; 26. Drive motor; 27. Connecting rod; 28. Multi-stage electric push rod; 29. ​​Connecting seat; 30. Ultrasonic thickness gauge; 31. First electric push rod; 32. Tactile limit switch; 33. Detection probe; 34. Dial indicator; 35. Moving rod; 36. First ball bearing; 37. T-shaped guide rod; 38. Spring; 39. Second pressure sensor; 40. Horizontal tube; 41. Support seat; 42. Electro-hydraulic rod; 43. Support leg. Detailed Implementation

[0044] The following detailed description of the borehole cast-in-place pile quality testing device and method of the present invention is based on the accompanying drawings and specific embodiments.

[0045] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0047] Example 1:

[0048] As attached Figure 1 , 2 As shown in Figures 3, 4, and 5, this embodiment provides a drilling and grouting pile quality testing device, including an annular fixed base 1. A U-shaped support rod 2 is fixedly connected to the top of the annular fixed base 1. Two supports 3 are fixedly installed on the top of the U-shaped support rod 2. A rotating shaft is rotatably connected to the side of the two supports 3 that are close to each other. A winding shaft 4 is fixedly connected between the two rotating shafts. A brake motor 7 is fixedly installed on the top of the U-shaped support rod 2 and fixedly connected to the right end of the right rotating shaft. A hanging rope 5 is wound on the winding shaft 4. The bottom end of the hanging rope 5 extends into the U-shaped support rod 2 and is fixedly connected to a pile top impact testing hammer head 6. A movable through hole is opened on the top inner wall of the U-shaped support rod 2. The hanging rope 5 is located in the movable through hole and does not contact the inner wall of the movable through hole, so as to allow the hanging rope 5 to move through. The brake motor 7 is used to drive the winding shaft 4 to quickly release and rewind the hanging rope 5. The pile top impact testing hammer head 6 is used to quickly drop the hanging rope 5 when it is released to perform impact testing on the pile foundation of the drilling and grouting pile.

[0049] Both sides of the pile top impact testing hammer 6 are fixedly connected to the top inner wall of the U-shaped support rod 2 with anti-wear vertical guide components. The anti-wear vertical guide components are used to provide anti-wear vertical guidance for the pile top impact testing hammer 6. An annular plate 12 is slidably sleeved on the U-shaped support rod 2. The top two sides of the annular plate 12 are provided with rectangular guide holes that slide and fit with the outer side of the U-shaped support rod 2. The annular plate 12 is slidably sleeved on the U-shaped support rod 2 through the two rectangular guide holes, which serves to guide the vertical sliding of the annular plate 12. A PLC controller 15 is fixedly installed on the left side of the U-shaped support rod 2. An alarm light 16 is fixedly and electrically connected to the top of the PLC controller 15. An alarm light 16 is fixedly installed on the top of the annular plate 12 and electrically connected to the PLC controller 15. The lifting drive assembly is connected, and the U-shaped support rod 2 is fitted on the lifting drive assembly. The drive motor 25, which is electrically connected to the PLC controller 15, is fixedly installed on the inner left side of the lifting drive assembly. The lifting drive assembly is used to drive the ring plate 12 to move up and down. The top of the ring plate 12 is rotatably mounted with a rotary drive assembly that is fixedly connected to the output shaft of the drive motor 25. The bottom left side of the rotary drive assembly is fixedly connected to a connecting rod 26. The bottom of the connecting rod 26 is fixedly mounted with a multi-stage electric push rod 27 that is electrically connected to the PLC controller 15. The extended end of the multi-stage electric push rod 27 is fixedly connected to a connecting seat 28. The rotary drive assembly is used to drive the connecting seat 28 to rotate circumferentially when the drive motor 25 is started.

[0050] The bottom of the annular plate 12 is hinged with inclined connecting rods 17 on all four sides. Two opposite connecting rods 17 are symmetrically arranged. The bottom end of the connecting rod 17 is hinged with a pressure-controlled clamping assembly electrically connected to the PLC controller 15. The annular fixed seat 1 is fitted on the four pressure-controlled clamping assemblies. The pressure-controlled clamping assembly is used to accurately control the pressure of the pile foundation under the control of the PLC controller 15 in conjunction with the lifting drive assembly. The right side of the connecting seat 28 is fixedly connected with a grouting pile thickness detection assembly electrically connected to the PLC controller 15. The grouting pile thickness detection assembly is used to detect the thickness of the pile foundation. The bottom of the connecting seat 28 is fixedly installed with a dial indicator 33. The telescopic detection end of the dial indicator 33 is fixedly connected to the right side of the connecting seat 28 with a pressure-measuring fit detection assembly electrically connected to the PLC controller 15. The pressure-measuring fit detection assembly is used to detect whether the periphery of the pile foundation is uniform. If it is not uniform, the PLC controller 15 controls the alarm light 16 to activate the alarm reminder.

[0051] Specifically, the anti-wear vertical guide assembly includes a vertical guide rod 9 fixedly connected to the inner wall of the top of the U-shaped support rod 2, and horizontal bars 8 fixedly connected to both sides of the pile top impact detection hammer head 6. Guide sleeves 10 are fixedly connected to the opposing ends of the two horizontal bars 8. Two anti-wear balls 11 are movably nested on the inner walls of the four sides of the guide sleeve 10. The vertical guide rod 9 is located between the corresponding eight anti-wear balls 11 and is in movable contact with the anti-wear balls 11. The vertical guide rod 9, horizontal bars 8, guide sleeves 10 and anti-wear balls 11 work together to perform anti-wear work when the guide sleeve 10 moves up and down. The guide sleeve 10 combined with the vertical guide rod 9 realizes the vertical guidance of the pile top impact detection hammer head 6.

[0052] Furthermore, the lifting drive assembly includes a U-shaped rod 13 fixedly connected to the top of the annular plate 12, and a U-shaped support rod 2 slidably sleeved on the U-shaped rod 13. The top of the U-shaped support rod 2 has two vertical guide holes, both of which slide and fit with the outer side of the U-shaped rod 13. The U-shaped support rod 2 slides on the U-shaped rod 13 through the two vertical guide holes, which serves to guide the vertical sliding of the U-shaped rod 13. A multi-stage electric telescopic rod 14 electrically connected to the PLC controller 15 is embedded and fixed on the top left side of the U-shaped support rod 2. The extended end of the multi-stage electric telescopic rod 14 is fixedly connected to the top inner wall of the U-shaped rod 13. The drive motor 25 is fixedly installed on the left inner wall of the U-shaped rod 13. The U-shaped rod 13 and the multi-stage electric telescopic rod 14 cooperate to drive the U-shaped rod 13 to move up and down, thereby driving the annular plate 12 to move up and down.

[0053] Furthermore, the rotary drive assembly includes an external gear ring 23 rotatably mounted on the top of the annular plate 12. A support bearing is fixedly connected to the top of the annular plate 12, and the inner ring of the support bearing is fixedly fitted to the outer side of the external gear ring 23, achieving the effect of rotatably mounting the external gear ring 23. A gear 24 meshes on the left side of the external gear ring 23. The top of the gear 24 is fixedly connected to the bottom end of the output shaft of the drive motor 25, and the bottom left side of the external gear ring 23 is fixedly connected to the top end of the connecting rod 26. The external gear ring 23 and the gear 24 cooperate, and the drive motor 25 drives the gear 24 to rotate. The gear 24 drives the external gear ring 23 to rotate. The rotation of the external gear ring 23 drives the connecting seat 28 to rotate circumferentially through the connecting rod 26 and the multi-stage electric push rod 27 in sequence.

[0054] Furthermore, the pressure-controlled clamping assembly includes an arc-shaped clamping plate 18 hinged to the bottom end of the corresponding connecting rod 17. All four arc-shaped clamping plates 18 are located within the annular fixing seat 1. Two opposing arc-shaped clamping plates 18 are symmetrically arranged. Anti-slip rubber 19 is glued and fixed to the adjacent side of each of the two opposing arc-shaped clamping plates 18. A first pressure sensor 20 is embedded and fixed to the adjacent side of each of the two opposing arc-shaped clamping plates 18. The anti-slip rubber 19 is movably sleeved on the corresponding first pressure sensor 20. One side of the anti-slip rubber 19 has an opening... Each of the four first pressure sensors 20 has a mounting hole for movable contact with the outer side of the corresponding first pressure sensor 20. All four first pressure sensors 20 are electrically connected to the PLC controller 15. Two horizontal guide rods 22 are fixedly connected to the opposing sides of the two opposing arc-shaped clamping plates 18. An annular fixing seat 1 is slidably fitted onto the eight horizontal guide rods 22. Two horizontal guide holes are opened on the inner walls of each of the four sides of the annular fixing seat 1, and the inner walls of the horizontal guide holes are slidably fitted onto the outer sides of the corresponding horizontal guide rods 22. The annular fixing seat 1 is slidably fitted onto the eight horizontal guide rods 22 through the eight horizontal guide holes. On each horizontal guide rod 22, a tension spring 21 is fixedly connected to the inner wall of the annular fixing seat 1 on the opposing sides of the two opposing arc-shaped clamping plates 18. The arc-shaped clamping plates 18, anti-slip rubber 19, first pressure sensor 20, horizontal guide rod 22 and tension spring 21 work together to drive the four connecting rods 17 to squeeze the four arc-shaped clamping plates 18 towards the center when the annular plate 12 moves down, thus performing the clamping work. The displacement of the arc-shaped clamping plates 18 stretches the corresponding tension spring 21. The first pressure sensor 20 detects the clamping force and transmits the pressure value to the PLC controller 15. When the preset clamping pressure value is reached, the PLC controller 15 controls the multi-stage electric telescopic rod 14 to automatically close, achieving the effect of pressure-controlled clamping. When it is necessary to release the clamping, when the annular plate 12 moves upward, it will drive the four connecting rods 17 to rotate upward and relax the squeezing force on the four arc-shaped clamping plates 18. The elastic force of the four tension springs 21 in the stretched state will drive the four arc-shaped clamping plates 18 to move outward and release the clamping state.

[0055] Furthermore, the pile thickness detection component includes an ultrasonic thickness gauge 29 embedded and fixed on the right side of the connecting seat 28. The right side of the ultrasonic thickness gauge 29 is electrically connected to a detection probe 32 via a flexible wire. A first electric push rod 30, electrically connected to a PLC controller 15, is fixedly installed on the top of the ultrasonic thickness gauge 29. The extended end of the first electric push rod 30 is fixedly installed on the top of the detection probe 32. A tactile limit switch 31, electrically connected to the PLC controller 15, is fixedly installed on the right side of the top of the detection probe 32. The ultrasonic thickness gauge 29, the first electric push rod 30, the detection probe 32, and the tactile limit switch 31 work together. The first electric push rod 30 drives the detection probe 32 to fit against the outside of the pile foundation, and the ultrasonic thickness gauge 29 detects the thickness of the pile foundation through the detection probe 32.

[0056] Furthermore, the pressure testing and contact detection assembly includes a movable rod 34 fixedly connected to the telescopic detection end of the dial indicator 33. Multiple first ball bearings 35 are movably nested on the right side of the movable rod 34. A horizontal tube 39 with a sealing structure at its right end is fixedly connected to the right side of the connecting seat 28. A T-shaped guide rod 36 is slidably fitted inside the horizontal tube 39. The right end of the T-shaped guide rod 36 extends outside the horizontal tube 39 and is fixedly connected to the left side of the movable rod 34. A guide hole is provided on the inner wall of the right end of the horizontal tube 39 to guide the T-shaped guide rod 36 to slide laterally and allow it to pass through. A second pressure sensor 38 is fixedly installed inside the horizontal tube 39 on the right side of the connecting seat 28. A spring 37 is fixedly connected between the right side of the second pressure sensor 38 and the left side of the T-shaped guide rod 36. The second pressure sensor 38 is electrically connected to the PLC controller 15. The movable rod 34, first ball bearings 35, and other components are also included. The horizontal tube 39, the second pressure sensor 38, the T-shaped guide rod 36, and the spring 37 work together. The multi-stage electric push rod 27 drives the connecting seat 28 to move to the right. The connecting seat 28 drives the dial indicator 33 and the moving rod 34 to move to the right, so as to drive the first ball bearing 35 to make tight contact with the outside of the pile foundation and compress the spring 37. The elastic force of the spring 37 has the effect of adaptive rightward displacement when the clamping force decreases. In this way, when the connecting seat 28 rotates around the outside of the pile foundation for contact detection, if an inward or outward eccentricity occurs, it can automatically change the squeezing force of the spring 37 on the second pressure sensor 38 and change the extension degree of the extension detection end of the dial indicator 33. The second pressure sensor 38 detects the squeezing force in real time and transmits the pressure value to the PLC controller 15. The pressure change enables the PLC controller 15 to control the alarm light 16 to turn on, and the dial indicator 33 detects the degree of eccentricity or inward and outward eccentricity.

[0057] This embodiment also proposes a detection method for a borehole cast-in-place pile quality testing device, including the following steps:

[0058] S1. Use an external crane to place the annular fixing seat 1 of this device on the outside of the pile foundation of the cast-in-place pile;

[0059] S2. The closing pressure value of the multi-stage electric telescopic rod 14 is preset in advance according to the clamping requirements using the PLC controller 15. The multi-stage electric telescopic rod 14 is started in reverse to drive the U-shaped rod 13 to move down. The U-shaped rod 13 drives the annular plate 12 to slide down on the U-shaped support rod 2. The annular plate 12 drives the four connecting rods 17 to rotate and squeeze the four arc-shaped clamping plates 18 in the same direction. Under the squeezing force, the four arc-shaped clamping plates 18 contract and move towards the middle, and respectively drive the corresponding horizontal guide rod 22 to move and the tension spring 21 to stretch. The four arc-shaped clamping plates 18 drive the four anti-slip rubber sheets 19 to clamp the pile foundation in the middle. The four arc-shaped clamping plates 18 drive the four first pressure sensors 20 to squeeze the pile foundation in the middle. The first pressure sensors 20 detect the squeezing force and transmit the pressure value to the PLC controller 15. When the preset value is reached, the PLC controller 15 controls the multi-stage electric telescopic rod 14 to close automatically, realizing the effect of integrated automatic and fast pressure clamping on the pile foundation from four directions, improving the connection and fixing efficiency and ease of use.

[0060] S3. During pile top impact testing, the forward-starting brake motor 7 drives the winding shaft 4 to rotate rapidly forward through the right-side shaft, quickly releasing the hoisting rope 5. Under the action of gravity, the pile top impact testing hammer 6 falls rapidly downward and performs impact testing on the top of the pile foundation. The pile top impact testing hammer 6 drives the two guide sleeves 10 to move downward through the two crossbars 8. The guide sleeves 10 drive the corresponding eight anti-wear balls 11 to slide downward against the vertical guide rod 9. By using the guide sleeves 10, anti-wear balls 11 and vertical guide rod 9 in cooperation, the vertical guidance and anti-deviation effect of the pile top impact testing hammer 6 is achieved. The reverse-starting brake motor 7 drives the winding shaft 4 to rotate and rewind the hoisting rope 5, thus pulling up the pile top impact testing hammer 6.

[0061] S4. When checking the uniformity of the periphery, the PLC controller 15 is used to pre-set the closing pressure value of the multi-stage electric push rod 27. The multi-stage electric push rod 27 is started in the forward direction, causing it to drive the connecting seat 28 to move to the right. The connecting seat 28 drives the dial indicator 33 and the horizontal tube 39 to move to the right. The telescopic detection end of the dial indicator 33 drives the moving rod 34 to move to the right. When the moving rod 34 drives the first ball 35 to contact the outside of the pile foundation, it is blocked and restricted. The connecting seat 28 continues to move to the right, driving the horizontal tube 39 to slide the T-shaped guide rod 36 to the right. The connecting seat 28 drives the second pressure sensor 38 to the right to compress the spring 37. The spring 37, in a compressed state, elastically tightens the moving rod 34 through the T-shaped guide rod 36. The connecting seat 28 also drives the dial indicator 33 to slide to the right on its own extension detection end, changing the measured value it displays. The second pressure sensor 38 detects the tension and transmits it to the PLC controller 15. When the preset value is reached, the PLC controller 15 controls the multi-stage electric push rod 27 to close, thereby controlling the pressure and tightening of the moving rod 34 and the first ball 35.

[0062] S5. After the moving rod 34 in step S4 is tightened by controlled pressure, the PLC controller 15 controls the drive motor 25 to start. The drive motor 25 drives the external gear ring 23 to rotate through the gear 24. The external gear ring 23 drives the dial indicator 33 to rotate around the pile foundation through the connecting rod 26, the multi-stage electric push rod 27, and the connecting seat 28 in sequence. The dial indicator 33 drives the first ball 35 to rotate around the outside of the pile foundation through the moving rod 34. When there is a slight inward or outward uneven phenomenon on the outside of the pile foundation, when rotating in the inward position, the elastic force of the spring 37 in the compressed state drives the moving rod 34 to move a part away from the connecting seat 28 through the T-shaped guide rod 36. The moving rod 34 drives the telescopic detection end of the dial indicator 33 to move a part outward to change the measurement value. When it moves to the outward position, the outward part will squeeze the first ball 35 to move closer to the connecting seat 28. The first ball bearing 35 moves to the left via the moving rod 34, causing the telescopic detection end of the dial indicator 33 and the T-shaped guide rod 36 to move to the left. The T-shaped guide rod 36 increases the compression of the spring 37. Whether it is convex or concave, it will change the compression of the spring 37, thereby changing the pressure value detected by the second pressure sensor 38. When the pressure value changes from the set control pressure value, the PLC controller 15 controls the alarm light 16 to turn on to remind personnel that the pile foundation is uneven or eccentric. This achieves the effect of detecting the uniformity of the pile foundation's perimeter during the inspection, eliminating the need for personnel to set up separate supports and perimeter uniformity detection equipment, thus improving work efficiency. In addition, before the perimeter rotation inspection, the dial indicator 33 is set to zero. When the telescopic detection end of the dial indicator 33 moves during the perimeter rotation inspection, the reading of the dial indicator 33 will change.

[0063] S6. When detecting the thickness, the first electric push rod 30 is started in the forward direction to drive the detection probe 32 to move to the right. When the detection probe 32 moves to the right and contacts the side of the pile foundation, it drives the light-touch limit switch 31 to move to the right and press against the outside of the pile foundation. The light-touch limit switch 31 is pressed and triggered, and transmits a stop signal to the PLC controller 15. The PLC controller 15 controls the first electric push rod 30 to automatically close. The ultrasonic thickness gauge 29 performs ultrasonic detection through the detection probe 32 that is in contact with the pile foundation and displays the thickness of the pile foundation, realizing the effect of integrated detection of the pile foundation thickness. After the detection is completed, the first electric push rod 30 is started in the reverse direction to drive the detection probe 32 and the light-touch limit switch 31 to separate from the pile foundation.

[0064] Example 2:

[0065] As attached Figure 6 and 7As shown, this embodiment differs from Embodiment 1 in that: support components are fixedly connected to all four sides of the annular fixed base 1. The support components include support seats 40, and the four sides of the annular fixed base 1 are fixedly connected to the corresponding support seats 40. An electric hydraulic rod 41 is embedded and fixedly installed on the top of the support seat 40. The extended end of the electric hydraulic rod 41 extends to the bottom of the corresponding support seat 40 and is fixedly connected to a support leg 42. The bottom of the support leg 42 is glued and fixedly fixed with anti-slip rubber. The support seat 40, electric hydraulic rod 41 and support leg 42 cooperate to adjust the up and down movement position of the corresponding support leg 42 according to the required support height by using the electric hydraulic rod 41, so as to achieve the effect of flexibly adjusting the support and testing height.

[0066] This embodiment also proposes a detection method for a borehole cast-in-place pile quality testing device, including the following steps:

[0067] S1. Using an external crane, the annular fixed seat 1 of this device is placed on the outside of the pile foundation of the cast-in-place pile. The four electric hydraulic rods 41 are started in the positive direction to drive the four legs 42 to move downward and contact the ground outside the pile foundation. The four legs 42, four electric hydraulic rods 41 and four support seats 40 are used to support the bottom.

[0068] S2. The closing pressure value of the multi-stage electric telescopic rod 14 is preset in advance according to the clamping requirements using the PLC controller 15. The multi-stage electric telescopic rod 14 is started in reverse to drive the U-shaped rod 13 to move down. The U-shaped rod 13 drives the annular plate 12 to slide down on the U-shaped support rod 2. The annular plate 12 drives the four connecting rods 17 to rotate and squeeze the four arc-shaped clamping plates 18 in the same direction. Under the squeezing force, the four arc-shaped clamping plates 18 contract and move towards the middle, and respectively drive the corresponding horizontal guide rod 22 to move and the tension spring 21 to stretch. The four arc-shaped clamping plates 18 drive the four anti-slip rubber sheets 19 to clamp the pile foundation in the middle. The four arc-shaped clamping plates 18 drive the four first pressure sensors 20 to squeeze the pile foundation in the middle. The first pressure sensors 20 detect the squeezing force and transmit the pressure value to the PLC controller 15. When the preset value is reached, the PLC controller 15 controls the multi-stage electric telescopic rod 14 to close automatically, realizing the effect of integrated automatic and fast pressure clamping on the pile foundation from four directions, improving the connection and fixing efficiency and ease of use.

[0069] S3. During pile top impact testing, the forward-starting brake motor 7 drives the winding shaft 4 to rotate rapidly forward through the right-side shaft, quickly releasing the hoisting rope 5. Under the action of gravity, the pile top impact testing hammer 6 falls rapidly downward and performs impact testing on the top of the pile foundation. The pile top impact testing hammer 6 drives the two guide sleeves 10 to move downward through the two crossbars 8. The guide sleeves 10 drive the corresponding eight anti-wear balls 11 to slide downward against the vertical guide rod 9. By using the guide sleeves 10, anti-wear balls 11 and vertical guide rod 9 in cooperation, the vertical guidance and anti-deviation effect of the pile top impact testing hammer 6 is achieved. The reverse-starting brake motor 7 drives the winding shaft 4 to rotate and rewind the hoisting rope 5, thus pulling up the pile top impact testing hammer 6.

[0070] S4. When checking the uniformity of the periphery, the PLC controller 15 is used to pre-set the closing pressure value of the multi-stage electric push rod 27. The multi-stage electric push rod 27 is started in the forward direction, causing it to drive the connecting seat 28 to move to the right. The connecting seat 28 drives the dial indicator 33 and the horizontal tube 39 to move to the right. The telescopic detection end of the dial indicator 33 drives the moving rod 34 to move to the right. When the moving rod 34 drives the first ball 35 to contact the outside of the pile foundation, it is blocked and restricted. The connecting seat 28 continues to move to the right, driving the horizontal tube 39 to slide the T-shaped guide rod 36 to the right. The connecting seat 28 drives the second pressure sensor 38 to the right to compress the spring 37. The spring 37, in a compressed state, elastically tightens the moving rod 34 through the T-shaped guide rod 36. The connecting seat 28 also drives the dial indicator 33 to slide to the right on its own extension detection end, changing the measured value it displays. The second pressure sensor 38 detects the tension and transmits it to the PLC controller 15. When the preset value is reached, the PLC controller 15 controls the multi-stage electric push rod 27 to close, thereby controlling the pressure and tightening of the moving rod 34 and the first ball 35.

[0071] S5. After the moving rod 34 in step S4 is tightened by controlled pressure, the PLC controller 15 controls the drive motor 25 to start. The drive motor 25 drives the external gear ring 23 to rotate through the gear 24. The external gear ring 23 drives the dial indicator 33 to rotate around the pile foundation through the connecting rod 26, the multi-stage electric push rod 27, and the connecting seat 28 in sequence. The dial indicator 33 drives the first ball 35 to rotate around the outside of the pile foundation through the moving rod 34. When there is a slight inward or outward uneven phenomenon on the outside of the pile foundation, when rotating in the inward position, the elastic force of the spring 37 in the compressed state drives the moving rod 34 to move a part away from the connecting seat 28 through the T-shaped guide rod 36. The moving rod 34 drives the telescopic detection end of the dial indicator 33 to move a part outward to change the measurement value. When the value is moved to the convex position, the convex part will squeeze the first ball 35 to move towards the connecting seat 28. The first ball 35 drives the telescopic detection end of the dial indicator 33 and the T-shaped guide rod 36 to move to the left through the moving rod 34. The T-shaped guide rod 36 increases the compression degree of the spring 37. Whether it is convex or concave, it will change the compression degree of the spring 37, thereby changing the pressure value detected by the second pressure sensor 38. When the pressure value changes from the set control pressure value, the PLC controller 15 controls the alarm light 16 to turn on to remind the personnel that the pile foundation is uneven or eccentric. This achieves the effect of detecting the uniformity of the pile foundation periphery in one go during the inspection, without the need for personnel to set up a separate support and periphery uniformity detection equipment, thus improving work efficiency.

[0072] S6. Before the circumferential rotation test, first set the dial indicator 33 to the zero state. When the extension and retraction detection end of the dial indicator 33 is displaced during the circumferential rotation test, the reading value of the dial indicator 33 will change. During the rotation test, the personnel can accurately judge the degree of eccentricity or concavity and convexity by observing the value of the dial indicator 33.

[0073] S7. When detecting the thickness, the first electric push rod 30 is started in the forward direction to drive the detection probe 32 to move to the right. When the detection probe 32 moves to the right and contacts the side of the pile foundation, it drives the light-touch limit switch 31 to move to the right and press against the outside of the pile foundation. The light-touch limit switch 31 is pressed and triggered, and transmits a stop signal to the PLC controller 15. The PLC controller 15 controls the first electric push rod 30 to automatically close. The ultrasonic thickness gauge 29 performs ultrasonic detection through the detection probe 32 that is in contact with the pile foundation and displays the thickness of the pile foundation, realizing the effect of integrated detection of the pile foundation thickness. After the detection is completed, the first electric push rod 30 is started in the reverse direction to drive the detection probe 32 and the light-touch limit switch 31 to separate from the pile foundation.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detecting the quality of bored cast-in-place piles, characterized in that, It includes an annular fixing seat, a U-shaped support rod on the top of the annular fixing seat, a pile top impact detection component on the top of the U-shaped support rod, and a wear-resistant vertical guide component between the pile top impact detection component and the inner wall of the U-shaped support rod. A ring plate is fitted onto the lower part of the U-shaped support rod. A lifting drive assembly is located at the top center of the ring plate, and a rotation drive assembly is located on the side of the top of the ring plate away from the U-shaped support rod. A connecting rod is located at the bottom of the rotation drive assembly, and a multi-stage electric push rod is located at the bottom of the connecting rod. A connecting seat is located at the extended end of the multi-stage electric push rod. A dial indicator is located at the bottom of the connecting seat, and a pressure testing and contact testing assembly is located at the telescopic detection end of the dial indicator. A pile thickness testing assembly is located at the upper part of the middle of the connecting seat. At the four corners of the bottom of the annular plate, there is an inclined connecting rod. Two connecting rods are symmetrically arranged opposite each other. The bottom of the connecting rod is hinged to a pressure control and reinforcement component. The annular fixing seat is fitted onto the four pressure control and reinforcement components. A PLC controller is installed on one outer side wall of the U-shaped support rod. The PLC controller is equipped with an alarm light and is electrically connected to the pile top impact detection component, the anti-wear vertical guide component, the lifting drive component, the rotation drive component, the pressure testing and bonding detection component, the cast-in-place pile thickness detection component, and the pressure control and reinforcement component. The lifting drive assembly includes an annular plate, which is slidably fitted on the lower part of the middle of the U-shaped support rod and has a U-shaped rod at the top. The two ends of the U-shaped rod extend through the top of the U-shaped support rod to the upper side of the annular plate. A multi-stage electric telescopic rod is provided on one side of the top of the U-shaped support rod. The multi-stage electric telescopic rod is electrically connected to the PLC controller and the extended end of the multi-stage electric telescopic rod is fixedly connected to the inner side of the top of the U-shaped rod. The rotary drive assembly includes a drive motor. The base end of the drive motor is installed in the lower middle part of the inner wall of the U-shaped rod. The output end of the drive motor is equipped with a gear, which meshes with an external gear ring. The external gear ring is located at the top of the annular plate, and a connecting rod is provided on one side of the bottom of the external gear ring. One end of the connecting rod is fixedly connected to the top of the external gear ring, and the other end of the connecting rod is equipped with a multi-stage electric push rod. The multi-stage electric push rod is electrically connected to the PLC controller, and the extended end of the multi-stage electric push rod is equipped with a connecting seat. The pile thickness detection assembly includes an ultrasonic thickness gauge embedded and fixed on one side of the connector. A detection probe is electrically connected to one side of the ultrasonic thickness gauge via a flexible wire. A first electric push rod electrically connected to a PLC controller is fixedly installed on the top of the ultrasonic thickness gauge. The extended end of the first electric push rod is fixedly connected to the detection probe. A tactile limit switch electrically connected to the PLC controller is fixedly installed on one side of the top of the detection probe. The pressure testing and contact detection assembly includes a movable rod fixedly connected to the telescopic detection end of a dial indicator. Multiple first ball bearings are movably nested on the side of the movable rod away from the dial indicator. A horizontal tube with a sealing structure at one end is fixedly connected to one side of the connecting seat. A T-shaped guide rod is slidably sleeved inside the horizontal tube. One end of the T-shaped guide rod extends outside the horizontal tube and is fixedly connected to one side of the movable rod. A second pressure sensor located inside the horizontal tube is fixedly installed on one side of the connecting seat. A spring is fixedly connected between the second pressure sensor and the T-shaped guide rod. The second pressure sensor is electrically connected to the PLC controller.

2. The drilling pile quality testing device according to claim 1, characterized in that, The pile top impact detection assembly includes a brake motor and two supports arranged parallel to each other on the top of the U-shaped support. The brake motor is electrically connected to the PLC controller and the base end of the brake motor is installed on the top of the U-shaped support. The output end of the brake motor is equipped with a winding shaft, which is located between the two supports and is rotatably connected to the two supports at both ends. A suspension rope is wound around the middle of the winding shaft, and the bottom end of the suspension rope extends into the U-shaped support, with a pile top impact detection hammer head installed at the bottom end of the suspension rope.

3. The drilling pile quality testing device according to claim 2, characterized in that, The anti-wear vertical guide assembly includes two parallel vertical guide rods. The upper end of the vertical guide rod is fixed to the inner wall of the top of the U-shaped support rod, and the lower end of the vertical guide rod extends to the lower part of the middle of the U-shaped support rod. A horizontal bar is provided between the two vertical guide rods. Guide sleeves are provided at both ends of the horizontal bar. Anti-wear balls are evenly and movably nested on the inner wall of the guide sleeve. The vertical guide rod is located between the anti-wear balls and is in movable contact with the anti-wear balls.

4. The drilling pile quality testing device according to claim 3, characterized in that, The pressure control and reinforcement assembly includes arc-shaped clamps hinged to the bottom ends of corresponding connecting rods. All four arc-shaped clamps are located within an annular fixed base. Two opposing arc-shaped clamps are symmetrically arranged. Anti-slip rubber is glued and fixed to the adjacent side of the two opposing arc-shaped clamps. A first pressure sensor is embedded and fixed to the adjacent side of the two opposing arc-shaped clamps. The anti-slip rubber is movably sleeved on the corresponding first pressure sensor. All four first pressure sensors are electrically connected to the PLC controller. Two horizontal guide rods are fixedly connected to the opposing side of the two opposing arc-shaped clamps. The annular fixed base is slidably sleeved on eight horizontal guide rods. Tension springs are fixedly connected between the opposing side of the two opposing arc-shaped clamps and the inner wall of the annular fixed base.

5. The drilling pile quality testing device according to claim 4, characterized in that, The four sides of the annular fixed base are fixedly connected to support components. The support components include support bases. The four sides of the annular fixed base are respectively fixedly connected to the corresponding support bases. An electric hydraulic rod is embedded and fixedly installed on the top of the support base. The protruding end of the electric hydraulic rod extends to the bottom of the corresponding support base and is fixedly connected to a support foot. The bottom of the support foot is glued and fixedly fixed with anti-slip rubber.

6. A testing method using the drilling pile quality testing device as described in claim 5, characterized in that, The method is as follows: S1. Using an external crane, place the ring-shaped fixed seat on the outside of the pile foundation of the cast-in-place pile. Start the four electric hydraulic rods in the positive direction to drive the four legs to move downward and contact the ground outside the pile foundation for support. S2. Based on the clamping requirements, the PLC controller is used to pre-set the closing pressure value of the multi-stage electric telescopic rod. The multi-stage electric telescopic rod is started in reverse to drive the U-shaped rod to move downward. The U-shaped rod drives the four connecting rods through the ring plate to squeeze and drive the four arc-shaped clamping plates to retract and move towards the center. The arc-shaped clamping plates drive the corresponding horizontal guide rod to move and the tension spring to stretch. The four arc-shaped clamping plates drive the four anti-slip rubber sheets to clamp the pile foundation towards the center, and drive the four first pressure sensors to squeeze the pile foundation towards the center. The first pressure sensors detect the squeezing force and transmit it to the PLC controller. When the pressure value reaches the preset value, the PLC controller controls the multi-stage electric telescopic rod to close automatically, realizing integrated automatic and rapid pressure clamping on the pile foundation from four directions. S3. Start the brake motor in the forward direction. The brake motor drives the winding shaft to rotate quickly in the forward direction to release the hoisting rope. Under the action of gravity, the pile top impact test hammer falls rapidly downward and performs impact test on the top of the pile foundation. The pile top impact test hammer moves downward through two horizontal bars and two guide sleeves. The guide sleeves drive the corresponding eight anti-wear balls to slide downward against the vertical guide rod, so as to realize the vertical guidance and anti-deviation of the pile top impact test hammer. S4. The PLC controller is used to pre-set the closing pressure value of the multi-stage electric push rod. The multi-stage electric push rod is started in the forward direction. The multi-stage electric push rod drives the connecting seat to move to the right. The connecting seat drives the dial indicator and the horizontal tube to move to the right. When the extension detection end of the dial indicator moves the first ball through the moving rod to contact the outside of the pile foundation, it is blocked and restricted by the pile foundation. The connecting seat continues to move to the right, which drives the second pressure sensor to compress the spring to the right. The second pressure sensor detects the tension spring force and transmits it to the PLC controller. When the preset value is reached, the PLC controller controls the multi-stage electric push rod to close, realizing the pressure control and tension of the moving rod and the first ball. S5. After the moving rod is tightened by controlled pressure, the PLC controller starts the drive motor. The drive motor drives the external gear ring to rotate via gears. The external gear ring drives the dial indicator to rotate around the pile foundation via the connecting rod, multi-stage electric push rod, and connecting seat. The dial indicator drives the first ball bearing to rotate around the outside of the pile foundation via the moving rod. When there is a slight inward or outward unevenness on the outside of the pile foundation, when the rotation is at the inward concave part, the elastic force of the compressed spring drives the moving rod to move away from the connecting seat via the T-shaped guide rod. The moving rod drives the telescopic detection end of the dial indicator to move outward. The measurement values ​​are changed. When the device moves to the convex position, the convex part will squeeze the first ball and move it towards the connecting seat. The first ball drives the dial indicator's telescopic detection end and the T-shaped guide rod to move to the left through the moving rod. The T-shaped guide rod increases the compression of the spring. Whether it is convex or concave, it will change the compression of the spring, thereby changing the pressure value detected by the second pressure sensor. When the pressure value changes from the set control pressure value, the PLC controller controls the alarm light to turn on to remind personnel that the pile foundation is uneven or eccentric, thus realizing the integrated detection of the uniformity of the pile foundation. S6. In the forward start, the first electric push rod drives the detection probe to move to the right. When the detection probe moves to the right and contacts the side of the pile foundation, it drives the light-touch limit switch to move to the right and press against the outside of the pile foundation. The light-touch limit switch is pressed and a stop signal is transmitted to the PLC controller. The PLC controller controls the first electric push rod to automatically close. The ultrasonic thickness gauge performs ultrasonic detection through the detection probe that is in contact with the pile foundation and displays the thickness of the pile foundation, realizing integrated detection of the pile foundation thickness.

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