Pile pull-out resistance and pile body quality testing device

Abstract

The present invention provides a device for detecting the pull-out resistance and pile body quality of foundation piles, comprising: a work platform; a bracket; a crossbeam, the crossbeam is hinged to the bracket, a weight assembly is installed at one end of the crossbeam in the left and right directions, and a pile pulling assembly is installed at the other end, and a gyroscope for detecting the horizontal level of the crossbeam is installed on the crossbeam. Through the hinged design of the crossbeam and the bracket, the lifting mechanism on both sides of the frame, that is, the jack, lifts the weight to a certain height and drops it, and the weight impacts the main beam below, and the lever principle is used to make the pile pulling assembly rise, exerting an upward impact force on the pile to be inspected, so that the impact force on the pile to be inspected is measured by the pile pulling assembly, and the pull-out resistance and pile body quality of the foundation pile are detected.

Description

Technical Field

[0001] The invention relates to construction engineering detection equipment, in particular to a device for detecting the pull-out resistance of a foundation pile and the quality of a pile body. Background Art

[0002] With the continuous development of social economy, people are increasingly developing and utilizing underground space, especially in high-rise buildings, where large underground garages are often built. Underground garages are subject to large groundwater buoyancy during construction and use, and pull-out piles are often set up to offset the buoyancy of groundwater on underground garages. The bearing capacity of pull-out piles is generally tested by static load tests, which are time-consuming and costly. Generally, the total number of pull-out piles in underground garages ranges from a few hundred to several thousand. During testing, 1% of the total number of engineering piles is sampled. The large number of samples results in high costs and a long test cycle, which affects the progress of the project. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a device for detecting the pull-out resistance of foundation piles and the quality of pile bodies, which can quickly detect the piles to be inspected. Through the hinged design of the crossbeam and the bracket, the lifting mechanisms on both sides of the frame, namely the jacks, lift the heavy hammers to a certain height and then drop them, and the heavy hammers impact the main beam below. The principle of leverage is used to make the pile pulling assembly rise, exerting an upward impact force on the pile to be inspected, thereby measuring the impact force on the pile to be inspected through the pile pulling assembly, thereby realizing the detection of the pull-out resistance of the foundation piles and the quality of the pile bodies.

[0004] To achieve the above object, the present invention provides the following technical solution: a pile pull-out resistance and pile body quality detection device, comprising:

[0005] Horizontal working platform;

[0006] A bracket, the bracket is fixedly mounted on the working platform;

[0007] A crossbeam, with a connecting portion between the two ends of the crossbeam, the connecting portion is hinged to the bracket with the hinge axis as the center, a heavy hammer assembly is installed at one end of the crossbeam in the left and right directions, and a pile pulling assembly is installed at the other end. A gyroscope is installed on the crossbeam to detect the horizontality of the crossbeam.

[0008] The weight assembly includes a frame fixedly mounted on the crossbeam and a weight arranged in the frame. The front and rear sides of the weight are fixedly mounted with universal ball assembly brackets. The universal ball assembly and a spring are mounted on the universal ball assembly bracket. The spring is located between the universal ball assembly and the corresponding front and rear sides of the weight. The inner walls of the frame at the front and rear sides of the weight are provided with guide rails for the universal ball of the universal ball assembly to move.

[0009] The left and right sides of the frame are provided with a lifting mechanism for lifting the weight upward, and the left and right sides of the weight are fixedly installed with a decoupling device, which includes grooves symmetrically arranged on the left and right sides of the weight, bearings fixed on the left and right sides of the weight, a slider passing through the bearing and axially slidingly cooperating with the bearing, and a spring, one end of the spring is installed at the bottom of the groove, and the other end is installed on the slider, the upper end of the free end of the slider has a slope A, and the lower end of the free end of the slider is supported on the lifting mechanism, and the left and right side frames of the frame are provided with channels for the slider to slide up and down inside, and the upper end of the channel has a slope B for the slope A to move along;

[0010] The pile extraction kit includes:

[0011] The slide plate is in contact and sliding cooperation with the cross beam.

[0012] The first oil cylinder is installed on the crossbeam. The telescopic rod of the first oil cylinder is telescopic in the left and right directions. The telescopic rod of the first oil cylinder is fixedly connected to the slide plate.

[0013] The point-shaped red light emitter is located at the lower end surface of the slide, and the lower end surface of the slide is located below the crossbeam. The emission direction of the point-shaped red light emitter is downward. There are at least 3 point-shaped red light emitters and they are evenly distributed in the same circumference.

[0014] Impact force sensor, the impact force sensor is installed on the upper end of the skateboard.

[0015] The lower ball joint is fixed on the upper end of the impact force sensor.

[0016] Upper ball joint, upper ball joint and lower ball joint,

[0017] There are several tie rods, which pass through the upper ball joint and the slide plate from top to bottom. The diameter of the hole on the slide plate through which the tie rod passes is larger than the diameter of the tie rod.

[0018] The clamp is installed at the lower end of the pull rod.

[0019] The bracket is installed on the working platform with its own axis as the center, and the ring gear is fixed on the bracket in a sleeve-type manner. A hydraulic motor and a gear driven by the hydraulic motor are installed on the working platform, and the gear meshes with the ring gear;

[0020] The device also includes an acceleration sensor installed on the pile to be inspected and used to measure the upward movement speed data of the pile to be inspected.

[0021] On the basis of the above solution, preferably, the lifting mechanism is a jack.

[0022] Based on the above solution, preferably, the guide rail is a groove arranged on the inner wall of the frame.

[0023] On the basis of the above scheme, preferably, the cross beam has a widened section below the weight, and the area of ​​the widened section is not less than the bottom area of ​​the weight.

[0024] Based on the above solution, preferably, the gyroscope is a ML728-MEMS three-axis current type gyroscope.

[0025] On the basis of the above scheme, as a preferred embodiment, the second oil cylinder is installed on the lower end surface of the slide plate, and the telescopic rod of the second oil cylinder is telescopically extended in the up-down direction;

[0026] The clamp comprises a left clamp and a right clamp, and both the left and right clamps are provided with side ears, the side ears are fixedly connected to the pull rod, and the fixed shaft passes through the side ears to fix the left and right clamps to each other, and the telescopic rod of the second oil cylinder is provided with an axial through hole in the left and right directions for the fixed shaft to pass through, which fixes the clamp to the cylinder in an idle state.

[0027] On the basis of the above scheme, as a preference, a universal wheel is provided on the lower end face of the beam directly below the weight. When the beam rotates, a groove is provided on the work surface located on the travel path of the universal wheel. A bearing member for the travel of the universal wheel is provided in the groove. A driving mechanism for lifting or lowering the bearing member is provided at the bottom of the groove, and the driving mechanism is a cylinder.

[0028] On the basis of the above scheme, as a preference, a red light emitting device is installed on the crossbeam, and the emission direction of the red light emitting device is the direction of the crossbeam axis from the weight hammer assembly end to the pile pulling assembly end.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. Through the hinged design of the crossbeam and the bracket, the lifting mechanism on both sides of the frame, i.e. the jack, lifts the heavy hammer to a certain height and drops it down. The heavy hammer hits the main beam below. By using the lever principle (effort-saving lever, the length of the left power arm is greater than the length of the right resistance arm), the pile pulling assembly rises and exerts an upward impact force on the inspected pile. The upward impact force and upward movement speed of the inspected pile are measured by the pile pulling assembly, thereby realizing the inspection of the pile pull-out resistance and pile body quality.

[0031] 2. On one side of the weight, the design of the universal ball assembly, spring, and universal ball assembly bracket is matched with the guide rail located on the inner wall of the frame to reduce the vibration generated during the falling process of the weight and the friction of the guide rail, play a shock-absorbing role, and the platform is stable and safe.

[0032] 3. The design of the unhooking device is coordinated with the slope surface B, so that when the heavy hammer rises to the slope surface B under the action of the jack, the slider can be separated from the jack, realizing automatic unhooking and the heavy hammer falling freely.

[0033] 4. The design of matching the bearing and the slider reduces the friction on the slider, making it easier for the slider to disengage from the jack.

[0034] 5. Through the design of the gyroscope, it is possible to detect whether the beam remains horizontal.

[0035] 6. The area of ​​the wide section should not be less than the bottom area of ​​the heavy hammer, which maximizes the bearing surface of the heavy hammer and increases the service life of the equipment.

[0036] 7. Through the design of the upper ball joint, the lower ball joint, the slide plate that slides in contact with the cross beam, the impact force sensor fixedly connected to the slide plate, the lower ball joint that is fixedly connected to the impact force sensor, and the pull rod, when the pile body is pulled, the lower ball joint and the slide plate will tilt upward with the cross beam, the upper ball joint and the clamp will remain vertical, and the pulling direction of the clamp will remain vertical, so as to ensure that the force direction of the pipe pile is vertically upward.

[0037] 8. The design of the first oil cylinder cooperating with the point-shaped red light emitter can adjust the horizontal position of the point-shaped red light emitter. It is coordinated with the design of the gyroscope and the bracket rotatably installed on the working platform to realize the rotation of the working platform. When the point emitted by the point-shaped red light emitter is on the circumference of the pile, the crossbeam is horizontal and the center of the slide plate is on the vertical line with the center of the inspected pile. The function is to ensure that the force direction of the inspected pile is vertically upward.

[0038] 9. Through the design of the clamp and the second oil cylinder, it is convenient to move the clamp and the pull rod upward using the second oil cylinder in an idle state for easy transportation, etc.

[0039] 10. Universal wheels are designed to assist the crossbeam in rotation. When in working state, the load-bearing parts descend without affecting the work. When in idle state, the load-bearing parts rise to play a supporting role, thus avoiding deformation of the crossbeam caused by long-term heavy pressure from heavy hammers.

[0040] 11. The straight infrared ray is set on the central axis of the main beam. The hydraulic motor installed on the working platform drives the crossbeam to rotate horizontally, so that the straight infrared ray passes through the center of the inspected pile, that is, the central axis of the main beam passes through the center of the inspected pile. Then it can be ensured that the central axis of the slider on the main beam passes vertically through the center of the inspected pile.

[0041] 12. This device does not require a crane when in use, has low cost, short detection time and greatly improved efficiency.

[0042] 13. When in use, the device can directly collect impact force without using the elastic modulus of the pile body material to convert the force value (the pile body concrete has different degrees of nonlinearity and non-uniformity, and the elastic modulus is not a constant), and the accuracy of the force value is improved.

[0043] 13. The impact force sensor is installed on the device, and no manual installation is required on site, which saves time and improves detection efficiency.

[0044] 14. The working platform of this device is a crawler-type walking working platform. When in use, it has good adaptability to the site and is easy to move.

[0045] 15. The platform is connected to the anchor pile, and the heavy hammer has a guide device, which points vertically downward. The platform is stable and highly safe.

[0046] 16. During the inspection, the foundation pile moves upward, the pile end is separated from the soil at the pile end, and the upper and lower wave impedances of the pile end interface change significantly, making it easier to detect this change, that is, the effective inspection depth is large, which is convenient for analyzing the quality of the pile body.

[0047] 17. While testing the pull-out bearing capacity, the quality of the pile body should be tested to determine whether the defects of the pile body affect the vertical pull-out bearing capacity, and then analyze and determine the type of defects.

[0048] 18. The drop distance of the heavy hammer is controllable, and different drop distances can be selected according to the pull-out bearing capacity.

[0049] 19. Use infrared combination to realize the centering of the slide plate and the inspected pile, without manual centering, with high precision, safety and reliability.

[0050] 20. An arc-shaped rubber is set inside the clamp to increase the friction between the clamp and the inspected pile and play the role of low-pass filtering. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of the structure of the present invention;

[0052] Figure 2 yes Figure 1 A magnified view of part A;

[0053] Figure 3 is an enlarged view of part C;

[0054] Figure 4 is a top view of the present invention;

[0055] Figure 5 yes Figure 4 A magnified view of part B;

[0056] Figure 6 It is a schematic diagram of the coordination of the working platform and the heavy hammer assembly. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] like Figure 1-6 As shown, the pile pull-out resistance and pile body quality detection device includes:

[0059] Horizontal working platform 1;

[0060] Bracket 2, the bracket is fixedly installed on the working platform;

[0061] The crossbeam 3 has a connecting portion between the two ends of the crossbeam, and the connecting portion is hinged to the bracket with the hinge shaft 4 as the center. A heavy hammer assembly is installed at one end of the crossbeam in the left and right directions, and a pile pulling assembly is installed at the other end. A gyroscope is installed on the crossbeam to detect the horizontality of the crossbeam.

[0062] The weight assembly includes a frame 5 fixedly mounted on the crossbeam and a weight 6 arranged in the frame. Universal ball assembly brackets are fixedly mounted on the front and rear sides of the weight. Universal ball assembly brackets are mounted on universal ball assembly brackets. Universal ball assembly 7 and spring 8 are installed. The spring is located between the universal ball assembly and the corresponding front and rear sides of the weight. The inner wall of the frame on the front and rear sides of the weight is provided with a guide rail 9 for the universal ball of the universal ball assembly to move.

[0063] The left and right sides of the frame are provided with a lifting mechanism for lifting the weight upward, and the left and right sides of the weight are fixedly installed with a decoupling device, which includes grooves 10 symmetrically arranged on the left and right sides of the weight, bearings 11 fixed on the left and right sides of the weight, a slider 12 passing through the bearing and axially slidingly cooperating with the bearing, and a spring, one end of the spring is installed at the bottom of the groove, and the other end is installed on the slider, the upper end of the free end of the slider has a slope A13, and the lower end of the free end of the slider is supported on the lifting mechanism, and the left and right side frames of the frame are provided with channels for the slider to slide up and down inside, and the upper end of the channel has a slope B14 for the slope A to move along;

[0064] The apparatus further comprises an acceleration sensor 35 which is installed on the pile to be inspected and is used to measure the movement speed data of the pile to be inspected.

[0065] In the above scheme, through the hinged design of the crossbeam and the bracket, the lifting mechanism on both sides of the frame, that is, the jack below, lifts the heavy hammer to a certain height and drops it, and the heavy hammer hits the main beam below. The lever principle is used to make the pile pulling assembly rise, exerting an upward impact force on the inspected pile, thereby measuring the impact force on the inspected pile through the pile pulling assembly, thereby realizing the pull-out resistance and pile body quality inspection of the foundation pile.

[0066] Among them, the design of the universal ball assembly, spring, and universal ball assembly bracket on one side of the heavy hammer is matched with the guide rail located on the inner wall of the frame to reduce the vibration generated during the falling process of the heavy hammer, play a shock-absorbing role, and the platform is stable and safe.

[0067] The design of the unhooking device is matched with the slope surface B, so that when the heavy hammer rises to the slope surface B under the action of the jack, the slider can be separated from the jack, realizing automatic unhooking and the heavy hammer falling.

[0068] The design of matching the bearing and the slider reduces the friction force on the slider, making it easier for the slider to unhook the jack.

[0069] The design of the gyroscope keeps the beam in a horizontal state.

[0070] During testing, this scheme uses an impact force sensor to detect the impact force size data of the tested pile and a three-axis acceleration sensor to detect the movement speed data of the tested pile, thereby obtaining the impact force time history curve and velocity time history curve of the tested pile, and using wave theory to analyze the pull-out resistance and pile body quality.

[0071] The lifting mechanism is a jack 15 .

[0072] The guide rail is a groove arranged on the inner wall of the frame.

[0073] The crossbeam is located below the weight and has a widened section, the area of ​​which is not less than the bottom area of ​​the weight, so that the bearing surface of the weight is maximized and the service life of the equipment is increased.

[0074] The gyroscope 16 is a ML728-MEMS three-axis current type gyroscope.

[0075] The impact force sensor is NOS-F306 impact force sensor.

[0076] The acceleration sensor is a PCB629M06 multi-axis acceleration sensor.

[0077] The pile extraction kit includes:

[0078] A slide plate 17, wherein the slide plate and the cross beam are in contact and sliding cooperation;

[0079] A first oil cylinder 18, the first oil cylinder is installed on the crossbeam, the telescopic rod of the first oil cylinder is telescopic in the left-right direction, and the telescopic rod of the first oil cylinder is fixedly connected to the slide plate;

[0080] Point-shaped red light emitters 19, which are located on the lower end surface of the slide plate, and the lower end surface of the slide plate is located below the crossbeam, and the emission direction of the point-shaped red light emitters is downward. There are at least 3 point-shaped red light emitters and they are evenly distributed in the same circumferential direction;

[0081] An impact force sensor 20 is mounted on the upper end of the slide plate;

[0082] A lower ball joint 21, which is fixed to the upper end of the impact force sensor;

[0083] Upper ball joint 22, upper ball joint and lower ball joint;

[0084] A pull rod 23, which has a plurality of pull rods, passes through the upper ball joint and the slide plate from top to bottom, and the diameter of the hole on the slide plate through which the pull rod passes is larger than the diameter of the pull rod;

[0085] A clamp 24, which is mounted on the lower end of the pull rod;

[0086] The bracket is rotatably mounted on the working platform with its own axis as the center. The ring gear is fixed on the bracket in a sleeve-type manner. A hydraulic motor and a gear 25 driven by the hydraulic motor are installed on the working platform, and the gear meshes with the ring gear 26.

[0087] In the above-mentioned pile pulling component design, through the design of the upper ball joint, the ball joint of the lower ball joint, the slide plate that slides in contact with the cross beam, the impact force sensor fixedly connected to the slide plate, the lower ball joint fixedly connected to the impact force sensor, and the pull rod, when the pile body is pulled, the lower ball joint and the slide plate will tilt upward with the cross beam, the upper ball joint and the clamp will still remain vertical, and the pulling direction of the clamp will still be in the vertical direction, so as to ensure that the force direction of the pipe pile is vertically upward?

[0088] Among them, the design of the first oil cylinder cooperating with the point-shaped red light emitter can adjust the horizontal position of the point-shaped red light emitter, and the design of the gyroscope and the bracket rotatably installed on the working platform can realize the rotation of the working platform. When the point emitted by the point-shaped red light emitter is on the circumference of the pile, the crossbeam is horizontal and the center of the slide board is on the vertical line with the center of the inspected pile, which ensures that the force direction of the pipe pile is vertically upward.

[0089] A second oil cylinder 27, the second oil cylinder is installed on the lower end surface of the slide plate, and the telescopic rod of the second oil cylinder is telescopic in the up-down direction;

[0090] The clamp comprises a left clamp and a right clamp, each of which has a side ear 28, the side ear is fixedly connected to the pull rod, and the fixed shaft passes through the side ear to fix the left and right clamps to each other. The telescopic rod of the second oil cylinder has an axial through hole 29 in the left and right direction for the fixed shaft to pass through, which fixes the clamp to the cylinder in an idle state.

[0091] The design of the clamp and the second oil cylinder makes it easy to move the clamp and the pull rod upward using the second oil cylinder in an idle state for easy transportation, etc.

[0092] A universal wheel 30 is arranged on the lower end face of the beam just below the weight. When the beam rotates, a groove 31 is provided on the work surface on the travel path of the universal wheel. A bearing member 32 for the universal wheel to travel is arranged in the groove. A driving mechanism 33 for lifting or lowering the bearing member is arranged at the bottom of the groove, and the driving mechanism is an oil cylinder.

[0093] In this solution, universal wheels are designed to assist the rotation of the crossbeam. In the working state, the load-bearing parts descend without affecting the work. In the idle state, the load-bearing parts rise to play a supporting role, thus preventing the crossbeam from being deformed due to long-term pressure from the heavy hammer.

[0094] A red light emitting device is installed on the crossbeam, and the emitting direction of the red light emitting device is the crossbeam axis direction from the end of the heavy hammer assembly to the end of the pile pulling assembly. The red light emitting device is a straight infrared ray, which is set on the central axis of the main beam. The hydraulic motor installed on the working platform drives the crossbeam to rotate horizontally, so that the straight infrared ray passes through the center of the inspected pile, that is, the central axis of the main beam passes through the center of the inspected pile. Then it can be ensured that the central axis of the slider on the main beam passes through the center of the inspected pile 34.

[0095] When the solution of the present invention is used:

[0096] 1. Move the device to the vicinity of the pile to be inspected and ensure that the pile to be inspected is under the slider.

[0097] 2. The four-leg cylinders are extended, the clamps are connected to the surrounding anchor piles, the clamp jacks are loaded, the clamps lock the anchor piles, and the platform is ensured to be level by adjusting the extension and retraction of the four cylinders (monitored by the gyroscope installed on the working platform).

[0098] 3. The beam rotates horizontally to make the straight infrared ray pass through the center of the pile to be inspected. Adjust the telescopic first cylinder on the main beam to make the circular infrared ray under the slide overlap with the pile to be inspected.

[0099] 4. The second oil cylinder under the main beam extends, so that the hydraulic clamp is put on the inspected pile, and the jack on the clamp extends, so that the clamp holds the inspected pile tightly.

[0100] 5. Adjust the extension and contraction of the second oil cylinder to make the beam level. After it is level, tighten the nuts on the slide to fix the slide to the main beam.

[0101] 6. Disassemble the upper horizontal axis of the clamp and disconnect the second oil cylinder from the clamp. Install the acceleration sensor symmetrically 30cm below the clamp.

[0102] 7. Connect the impact force sensor and acceleration sensor to the acquisition system.

[0103] 8. The oil cylinder on the platform retracts downward and the limit frame leaves the weight.

[0104] 9. The heavy hammer is loaded upwards through two jacks. When it encounters the unhooking device, the heavy hammer automatically falls down and hits the main beam.

[0105] 10. Pull-out bearing capacity of single pile

[0106] t1——The time corresponding to the first peak of the speed-time curve

[0107] F(t1)——impact force at time t1

[0108] v(t1)——the velocity of the particle at time t1

[0109] A——Cross-sectional area of ​​pile

[0110] C——Pile body stress propagation speed

[0111] E t ——Tensile elastic modulus of pile concrete

[0112] G p ——The dead weight of the pile below the installation point of the acceleration sensor, and the floating weight below the groundwater level

[0113] L——Length of the pile under the acceleration sensor installation point

[0114] Pile quality factor

[0115] t1——The time corresponding to the first peak of the speed-time curve

[0116] tx——The time corresponding to the defect reflection peak

[0117] F(t1)——Force at time t1

[0118] v(t1)——the velocity of the particle at time t1

[0119] A——Cross-sectional area of ​​pile

[0120] C——Pile body stress propagation speed

[0121] E t ——Tensile elastic modulus of pile concrete

[0122] R x ——Estimated value of soil resistance above the defect

[0123] x——the distance from the pile defect to the acceleration sensor installation point

[0124] More specifically, the acquisition system acquires the impact force and time relationship curve (Ft), and the velocity and time relationship curve (vt) through the impact force sensor and the acceleration sensor.

[0125] speed

[0126] At time t1, F(t1) = 1580 kN, v(t1) = 1.67 m / s, at time t1+2L / C, v(t1+2L / C) = 1.0 m / s, C = 3800 m / s, A = 0.2826 m 2 , E t =3.15×1010 kpa, G p =98.83kN,

[0127] Pull-out bearing capacity of single pile

[0128] t1=3ms t x =10ms,

[0129] F(tx)=922kN v(t x )=0.60m / s R x =105kN

[0130]

[0131] Pile body quality evaluation table

[0132] category δ Ⅰ 1 Ⅱ 0.8≤δ<1 Ⅲ 0.6≤δ<0.8 Ⅳ δ<0.6

[0133] According to the pile body weight evaluation table, the pile body quality is Class II.

[0134] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A device for detecting the pull-out resistance and pile body quality of pile foundation, characterized in that: include: Horizontal working platform; A bracket, the bracket is fixedly mounted on the working platform; A crossbeam, with a connecting portion between the two ends of the crossbeam, the connecting portion is hinged to the bracket with the hinge axis as the center, a heavy hammer assembly is installed at one end of the crossbeam in the left and right directions, and a pile pulling assembly is installed at the other end. A gyroscope is installed on the crossbeam to detect the horizontality of the crossbeam. The weight assembly includes a frame fixedly mounted on the crossbeam and a weight arranged in the frame. The front and rear sides of the weight are fixedly mounted with universal ball assembly brackets. The universal ball assembly and a spring are mounted on the universal ball assembly bracket. The spring is located between the universal ball assembly and the corresponding front and rear sides of the weight. The inner walls of the frame at the front and rear sides of the weight are provided with guide rails for the universal ball of the universal ball assembly to move. The left and right sides of the frame are provided with a lifting mechanism for lifting the weight upward, and the left and right sides of the weight are fixedly installed with a decoupling device, which includes grooves symmetrically arranged on the left and right sides of the weight, bearings fixed on the left and right sides of the weight, a slider passing through the bearing and axially slidingly cooperating with the bearing, and a spring, one end of the spring is installed at the bottom of the groove, and the other end is installed on the slider, the upper end of the free end of the slider has a slope A, and the lower end of the free end of the slider is supported on the lifting mechanism, and the left and right side frames of the frame are provided with channels for the slider to slide up and down inside, and the upper end of the channel has a slope B for the slope A to move along; The pile extraction kit includes: The slide plate is in contact and sliding cooperation with the cross beam. The first oil cylinder is installed on the crossbeam. The telescopic rod of the first oil cylinder is telescopic in the left and right directions. The telescopic rod of the first oil cylinder is fixedly connected to the slide plate. The point-shaped red light emitter is located at the lower end surface of the slide, and the lower end surface of the slide is located below the crossbeam. The emission direction of the point-shaped red light emitter is downward. There are at least 3 point-shaped red light emitters and they are evenly distributed in the same circumference. Impact force sensor, the impact force sensor is installed on the upper end of the skateboard. The lower ball joint is fixed on the upper end of the impact force sensor. Upper ball joint, upper ball joint and lower ball joint, There are several tie rods, which pass through the upper ball joint and the slide plate from top to bottom. The diameter of the hole on the slide plate through which the tie rod passes is larger than the diameter of the tie rod. The clamp is installed at the lower end of the pull rod. The bracket is installed on the working platform with its own axis as the center, and the ring gear is fixed on the bracket in a sleeve-type manner. A hydraulic motor and a gear driven by the hydraulic motor are installed on the working platform, and the gear meshes with the ring gear; Also included is an acceleration sensor for installation on the pile to be inspected and for measuring the movement speed data of the pile to be inspected; The guide rail is a groove arranged on the inner wall of the frame; A second oil cylinder is installed on the lower end surface of the slide plate, and the telescopic rod of the second oil cylinder is telescopically extended in an up-and-down direction; The clamp comprises a left clamp and a right clamp, and both the left and right clamps are provided with side ears, the side ears are fixedly connected to the pull rod, and the fixed shaft passes through the side ears to fix the left and right clamps to each other, and the telescopic rod of the second oil cylinder is provided with an axial through hole in the left and right directions for the fixed shaft to pass through, which fixes the clamp to the cylinder in an idle state.

2. The pile pull-out resistance and pile body quality detection device according to claim 1, characterized in that: The lifting mechanism is a jack.

3. The pile pull-out resistance and pile body quality detection device according to claim 1, characterized in that: The cross beam is located below the weight and has a widened section, and the area of ​​the widened section is not less than the bottom area of ​​the weight.

4. The pile pull-out resistance and pile body quality detection device according to claim 1, characterized in that: The gyroscope is a ML728-MEMS three-axis current type gyroscope.

5. The pile pull-out resistance and pile body quality detection device according to claim 1, characterized in that: A universal wheel is arranged on the lower end face of the beam directly below the heavy hammer. When the beam rotates, a groove is provided on the work surface on the travel path of the universal wheel. A bearing member for the universal wheel to travel is arranged in the groove. A driving mechanism for lifting or lowering the bearing member is arranged at the bottom of the groove, and the driving mechanism is an oil cylinder.

6. The pile pull-out resistance and pile body quality detection device according to claim 1, characterized in that: A red light emitting device is installed on the crossbeam, and the emitting direction of the red light emitting device is the direction of the crossbeam axis from the end of the heavy hammer assembly to the end of the pile pulling assembly.

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