A pile foundation detection device with a protection structure

Abstract

The present invention discloses a pile foundation detection device with a protection structure, which includes a pile foundation, a base, a protection frame and an operation box. The base is welded to the upper protection frame. An adjustable weight, an automatic hook release device and an adjustment plate are provided inside the protection frame. The bottom of the operation box is provided with a bottom plate, and the bottom plate is welded to the top of the protection frame. A pressure maintaining support device and a wire reel are provided inside the operation box. The top of the automatic hook release device is connected with a suspension rope, and the suspension rope passes through the through holes on the adjustment plate and the protection frame and is wound and stored on the wire reel. A laser rangefinder is provided on the inner side of the top of the protection frame. A center positioning device and a horizontal adjustment device are provided inside the base. The present invention solves the safety hazards caused by the easy out-of-control of the weight during the actual application of the existing high-strain method for pile foundation detection, overcomes the problem of low efficiency of multi-point detection, adds a center positioning device and a horizontal adjustment device, and combines the cooperation of the limit table and the guide column to effectively control the falling process of the weight, with strong safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation detection, and specifically refers to a pile foundation detection device with a protection structure. Background Art

[0002] The main methods of pile foundation detection include static load test, core drilling method, low strain method, high strain method, acoustic wave transmission method, etc. Among them, the high strain method is a method for detecting the integrity of the pile body of a pile foundation and the vertical bearing capacity of a single pile. In this method, a heavy hammer with a weight of more than 10% of the pile body weight or more than 1% of the vertical bearing capacity of a single pile is used to freely fall and strike the top of the pile, so as to obtain relevant dynamic coefficients, measure the velocity and force time history curves at the top of the pile, and judge the vertical compressive bearing capacity of a single pile and the integrity of the pile body through wave theory analysis. Because its detection is relatively comprehensive, it is a commonly used detection method at the construction site.

[0003] In the actual application of the high strain method for pile foundation detection, a crane is mostly used to lift the heavy hammer, and the heavy hammer is unhooked and freely falls to hammer the pile foundation. This will make it impossible to accurately determine the landing point of the heavy hammer, and multiple alignment adjustments are required. In some applications, a guiding cage is used to align the landing point of the heavy hammer. In actual use, the heavy hammer will shift after hammering, resulting in hitting the guiding cage, and the huge gravity will drive the guiding cage to tilt, which has certain potential safety hazards. This situation is particularly prominent when the ground of the detection area around the pile foundation is uneven during the preparation stage of pile foundation detection. If it is necessary to operate in accordance with safety regulations, a large amount of time is required to level the ground and install equipment during the preparation stage of pile foundation detection, and the efficiency is low. When multiple pile foundations need to be detected, the detection device needs to be disassembled, assembled and transported multiple times, which is contradictory to the existing high-efficiency construction environment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a pile foundation detection device with a protection structure.

[0005] To solve the above technical problems, the technical solution provided by the present invention is as follows: A pile foundation detection device with a protection structure, including a pile foundation, a base, a protection frame, and an operation box. The base is welded to the upper protection frame. The protection frame is composed of connecting beams, support beams, and functional beams. A cylindrical support structure is formed by welding the connecting beams with the support beams and functional beams. An adjustable weight, an automatic hook release device, and an adjustment plate are provided inside the protection frame. The bottom of the operation box is provided with a first bottom plate, and the first bottom plate is welded to the top of the protection frame. A second motor, a wire winding drum, and a third motor are provided inside the operation box. The top of the automatic hook release device is connected to a lifting rope. The lifting rope passes through the adjustment plate and the through hole on the protection frame and is wound and stored on the wire winding drum. A laser rangefinder is provided on the inner side of the top of the protection frame. The base is composed of an outer protection shell, an inner protection shell, a connecting plate, a central positioning device, and a horizontal adjustment device. The outer protection shell and the inner protection shell are welded and connected to the connecting plate. The central positioning device is composed of a first motor, a threaded push rod, and a positioning column. The horizontal adjustment device is composed of a hydraulic cylinder, a hydraulic rod, and a support plate.

[0006] As an improvement: Multiple central positioning devices and horizontal adjustment devices are evenly arranged inside the base. The central positioning devices and the horizontal adjustment devices are arranged at intervals and staggered. The first motor is fixed on the connecting plate. The output end of the first motor is connected to the threaded push rod. The threaded push rod is in threaded cooperation with the threaded hole on one side of the positioning column. The positioning column passes through the side through hole of the inner protection shell and is in sliding cooperation with the inner protection shell. The hydraulic cylinder is fixed to the bottom of the connecting plate. The hydraulic cylinder cooperates with the hydraulic rod. The bottom of the hydraulic rod is hinged to the support plate. By means of the central positioning device, the axis of the protection frame can be made to coincide with the axis of the pile foundation. By means of the horizontal adjustment device, the axis of the protection frame can be made perpendicular to the top surface of the pile foundation, ensuring the longitudinal rebound of the weight after hitting the pile foundation, preventing the weight from shifting, protecting the protection frame from being knocked crooked and damaged by the offset of the weight during falling and rebounding, and further protecting the surrounding equipment and people from being damaged.

[0007] As an improvement: The pressure-holding support device is composed of a cavity base, a jacking seat, a jacking plate, a motor four, a rotating rod and a plug. The cavity base is fixed in the top groove of the first bottom plate. The bottom of the jacking seat is slidably matched with the annular groove at the top of the cavity base, so that the annular groove of the cavity base forms a pressure chamber. The jacking plate is slidably matched with the through hole at the bottom of the jacking seat. A spring is connected between the top surface of the through hole at the bottom of the jacking plate and the jacking seat. The motor four is fixed in the first bottom plate. One end of the rotating rod is connected to the output end of the motor four, and the other end is provided with a thread on the outer side, which is matched with the threaded hole on one side of the plug. The plug is slidably matched with the internal through hole of the first bottom plate, and the plug is inserted and matched with the side through hole of the cavity base. The first bottom plate is provided with a vent hole at the internal through hole where the plug is located. Through the moving cooperation of the pressure-holding support device and the adjusting plate, after the height of the adjusting plate is fixed, the plug is blocked with the side through hole of the cavity base, so that the annular groove in the cavity base forms a sealed pressure chamber. By using the ejector rod and the jacking plate, after the adjusting plate receives the acting force exerted by the automatic unhooking device during the rising process of contact, the pressure-holding support device exerts a reverse acting force on the adjusting plate through the ejector rod, so as to ensure the stability of the adjusting plate and protect the adjusting plate from deformation after multiple uses. The setting of the jacking plate and the spring can buffer the acting force exerted by the kinetic energy of the automatic unhooking device on the pressure-holding support device and the first bottom plate through the adjusting plate and the ejector rod when the automatic unhooking device just contacts the adjusting plate, preventing the pressure-holding support device from being damaged.

[0008] As an improvement: The adjustable counterweight is composed of a second bottom plate, a suspension column and an insertion plate. The top of the second bottom plate is fixedly connected to the suspension column. The through hole at the center of the insertion plate is inserted and matched with the suspension column. The through hole at the top of the suspension column is matched with the automatic unhooking device. A positioning rod is fixedly arranged on the top of the second bottom plate. The positioning rod is inserted and matched with the side through hole of the insertion plate. Limiting platforms are arranged on the sides of the second bottom plate and the insertion plate. When the second bottom plate and the insertion plate are in the assembled state, the limiting platforms form a continuous strip structure. The outer side of the positioning rod is provided with a thread, and the insertion plate is fastened by a nut. The top surfaces of the second bottom plate and the insertion plate are smooth planes. According to different pile foundations and the requirements of construction specifications, the weight of the counterweight can be quickly and conveniently changed. The limiting platform ensures that the falling direction of the counterweight remains vertical. The smooth top surfaces of the second bottom plate and the insertion plate are beneficial for the laser rangefinder to perform accurate distance measurement.

[0009] As an improvement: The automatic decoupling device consists of a first hook, a second hook, a shear column and a protective box. The shear column passes through the through holes in the middle sections of the first hook and the second hook, and is fixedly connected to the protective box at both ends. The first hook and the second hook are hinged through the shear column. Rollers are provided at the tops of the first hook and the second hook, and the rollers cooperate with the adjusting plate. A safety lock hole is provided on one side of the protective box. The first hook and the second hook are safely locked by inserting a pin into the safety lock hole to block movement, so that the heavy hammer automatically decouples after reaching the specified hammering distance, without manual assistance, improving safety.

[0010] As an improvement: A wire hole is provided at the center of the adjusting plate, and the lifting rope passes through the wire hole. Distance measuring through holes are provided on the adjusting plate, and the distance measuring through holes are vertically aligned with a laser distance meter. The laser output by the laser distance meter passes through the distance measuring through holes and hits the top surface of the adjustable heavy hammer for distance measurement. A baffle is provided at the distance measuring through hole at the bottom of the adjusting plate. One end of the baffle is fixedly provided with a turntable, and the turntable is rotationally matched with the adjusting plate. A convex platform is fixedly provided at the bottom of the baffle, and the top surface of the baffle is slidably matched with the ground of the adjusting plate, so that the distance between the bottom surface of the adjusting plate and the top surface of the heavy hammer can be accurately measured, keeping the height of the heavy hammer's fall constant, which is conducive to comparing different pile foundation data during multiple detection processes.

[0011] As an improvement: The third motor is fixed on the first bottom plate. The output end of the third motor is connected with a lifting rod. The lifting rod passes through the first bottom plate and is rotationally matched with the bottom of the inner groove of the functional beam. A limiting plate is provided on the side of the adjusting plate. The limiting plate is in contact with the adjusting plate and is slidably matched with the inner groove of the functional beam. External threads are provided on the outer side of the lifting rod, which cooperate with the threaded holes provided on the limiting plate. A top rod is fixedly provided at the top of the adjusting plate. The top rod passes through the first bottom plate and cooperates with the pressure-holding support device. The lifting rod drives the limiting plate to lift the adjusting plate, realizing the lifting of the adjusting plate. After the adjusting plate contacts the automatic decoupling device and receives a top force, the limiting plate can be separated from the adjusting plate, protecting the lifting rod from being damaged by the force exerted by the adjusting plate during the upward movement when the automatic decoupling device contacts.

[0012] As an improvement: The second motor is fixed on the first bottom plate. The wire winding drum is fixed through the support member at the top of the first bottom plate. The output end of the second motor is connected with a first gear. Gear two is connected to both sides of the wire winding drum. The first gear meshes with the second gear. By changing the torque through the first gear and the second gear, the output power of the second motor is reduced, the volume of the second motor is reduced, and the weight of the device above the first bottom plate is reduced, enabling the first bottom plate to better bear the force exerted by the wire winding drum on the first bottom plate when the heavy hammer rises.

[0013] As an improvement: Guide columns are fixedly arranged on the inner side of the support beam. The inner groove of the guide column cooperates with the limit platform, and there is a gap between the inner groove of the guide column and the limit platform, guiding the falling direction of the weight, preventing the weight from tilting when falling, changing the surface contact impact into a point contact impact, causing the surface of the pile foundation to be damaged due to high pressure, and the gap between the inner groove of the guide column and the limit platform can reduce the friction received when the weight falls, affecting the falling speed and further affecting the accuracy of the detection result.

[0014] As an improvement: Multiple diagonal braces are fixedly arranged on the top of the base, the diagonal braces are fixedly connected with the protective frame, and multiple wheels are arranged at the bottom of the outer protective shell. The diagonal braces can enhance the structural stability, and the wheels at the bottom of the outer protective shell can facilitate the movement of the device, facilitating the positioning operation of the central positioning device.

[0015] The advantages of the present invention compared with the prior art are as follows: It solves the potential safety hazards caused by the out-of-control weight in the actual application of the existing high-strain method for pile foundation detection, overcomes the problem of low efficiency in multi-point detection, and enhances the structural stability. Specifically:

[0016] 1. On the basis of the commonly used guide frame, a central positioning device and a horizontal adjustment device are added, and combined with the cooperation of the limit platform and the guide column, the falling process of the weight is effectively controlled;

[0017] 2. Through the cooperation of the adjustment plate, the automatic hook release device and the laser rangefinder, the falling distance height between the weight and the pile foundation is accurately controlled, which is conducive to the horizontal comparison of multi-point pile foundation detection data and can more truly reflect the actual state of the pile foundation;

[0018] 3. The setting of the pressure-holding support device realizes the longitudinal support of the adjustment plate, enables the limit plate to be separated from the adjustment plate, and protects the lifting rod from damage;

[0019] 4. The device adopts an integrated structure, greatly reducing the work in the preparation stage of pile foundation detection and greatly improving the efficiency of multi-point pile foundation detection;

[0020] 5. The setting of the base and the protective frame strengthens the stability and safety of the device during use. The protective frame is welded with the support beam and the functional beam by connecting beams to form a cylindrical support structure, which not only ensures the structural stability but also allows observing and adjusting the internal device;

[0021] 6. The internal electric and hydraulic equipment realizes adjustment automation, reduces labor costs, shortens the monitoring preparation time, improves work efficiency, enhances construction safety, and has extremely strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a pile foundation detection device with a protective structure according to the present invention.

[0023] Figure 2 It is a cross-sectional view of the protective frame of a pile foundation detection device with a protective structure according to the present invention.

[0024] Figure 3 It is a cross-sectional view of the protective frame of a pile foundation detection device with a protective structure according to the present invention.

[0025] Figure 4 It is a cross-sectional view of the ranging through-hole of a pile foundation detection device with a protective structure according to the present invention.

[0026] Figure 5 It is a schematic structural diagram of the pressure-holding support device of a pile foundation detection device with a protective structure according to the present invention.

[0027] Figure 6 It is a cross-sectional view of the center positioning device of a pile foundation detection device with a protective structure according to the present invention.

[0028] Figure 7 It is a cross-sectional view of the horizontal adjustment device of a pile foundation detection device with a protective structure according to the present invention.

[0029] Figure 8 It is a schematic structural diagram of the automatic hook release device of a pile foundation detection device with a protective structure according to the present invention.

[0030] Figure 9 It is a schematic structural diagram of the adjustable weight of a pile foundation detection device with a protective structure according to the present invention.

[0031] Figure 10 It is an unfolded schematic diagram of the protective frame structure of a pile foundation detection device with a protective structure according to the present invention.

[0032] Figure 11 It is a schematic structural diagram of area A of the pressure-holding support device of a pile foundation detection device with a protective structure according to the present invention.

[0033] As shown in the figure: 1. Pile foundation; 2. Base; 3. Protective frame; 4. Operation box; 5. Adjustable counterweight; 6. Automatic hook release device; 7. Adjusting plate; 8. Pressure-holding support device; 9. Diagonal brace; 21. Motor 1; 22. Threaded push rod; 23. Positioning column; 24. Hydraulic cylinder; 25. Hydraulic rod; 26. Support plate; 27. Outer protective shell; 28. Inner protective shell; 29. Connecting plate; 31. Connecting beam; 32. Support beam; 33. Guide column; 34. Functional beam; 41. Bottom plate 1; 42. Motor 2; 43. Gear 1; 44. Gear 2; 45. Wire-winding drum; 46. Suspension rope; 47. Motor 3; 48. Lifting rod; 49. Laser rangefinder; 51. Bottom plate 2; 52. Suspension column; 53. Insertion plate; 54. Positioning rod; 55. Limit platform; 61. Hook 1; 62. Hook 2; 63. Protective box; 64. Roller; 65. Shear column; 66. Safety lock hole; 71. Wire hole; 72. Rangefinding through hole; 73. Limit plate; 74. Turntable; 75. Baffle; 76. Boss; 77. Thrust rod; 81. Cavity base; 82. Jacking seat; 83. Spring; 84. Jacking plate; 85. Motor 4; 86. Rotating rod; 87. Plug; 88. Vent hole. Detailed implementation mode

[0034] The present invention will be further described in detail below with reference to the accompanying drawings.

[0035] Combined with the attached Figure 1 and Figure 2 As shown, a pile foundation detection device with a protective structure includes a pile foundation 1, a base 2, a protective frame 3 and an operation box 4. The base 2 is welded to the upper protective frame 3. Multiple diagonal braces 9 are fixedly arranged on the top of the base 2, and the diagonal braces 9 are fixedly connected to the protective frame 3. The protective frame 3 is composed of a connecting beam 31, a support beam 32 and a functional beam 34. A guide column 33 is fixedly arranged inside the support beam 32. A cylindrical support structure is formed by welding the connecting beam 31 with the support beam 32 and the functional beam 34. An adjustable counterweight 5, an automatic hook release device 6 and an adjusting plate 7 are arranged inside the protective frame 3. A bottom plate 1 41 is arranged at the bottom of the operation box 4, and the bottom plate 1 41 is welded to the top of the protective frame 3. A motor 2 42, a wire-winding drum 45 and a motor 3 47 are arranged inside the operation box 4. The top of the automatic hook release device 6 is connected with a suspension rope 46. The suspension rope 46 passes through the adjusting plate 7 and the through holes on the protective frame 3 and is wound and stored on the wire-winding drum 45. A laser rangefinder 49 is arranged inside the top of the protective frame 3.

[0036] Combined with the attached Figure 1 、 Figure 6 and Figure 7As shown, the base 2 is composed of an outer protective shell 27, an inner protective shell 28, a connecting plate 29, a central positioning device, and a horizontal adjustment device. Multiple central positioning devices and horizontal adjustment devices are evenly arranged inside the base 2. The central positioning devices and the horizontal adjustment devices are arranged at intervals and staggered. The outer protective shell 27 and the inner protective shell 28 are welded to the connecting plate 29. Multiple wheels are provided at the bottom of the outer protective shell 27. The central positioning device is composed of a first motor 21, a threaded push rod 22, and a positioning column 23. The first motor 21 is fixed on the connecting plate 29. The output end of the first motor 21 is connected to the threaded push rod 22. The threaded push rod 22 is in threaded cooperation with the threaded hole on one side of the positioning column 23. The positioning column 23 passes through the side through hole of the inner protective shell 28 and is in sliding cooperation with the inner protective shell 28. The horizontal adjustment device is composed of a hydraulic cylinder 24, a hydraulic rod 25, and a support plate 26. The hydraulic cylinder 24 is fixed to the bottom of the connecting plate 29. The hydraulic cylinder 24 cooperates with the hydraulic rod 25. The bottom of the hydraulic rod 25 is hinged to the support plate 26.

[0037] Combined with the attached Figure 1 , Figure 5 and Figure 11 As shown, the pressure-holding support device 8 is composed of a cavity base 81, a jacking seat 82, a jacking plate 84, a fourth motor 85, a rotating rod 86, and a plug 87. The cavity base 81 is fixed in the top groove of the first bottom plate 41. The bottom of the jacking seat 82 is in sliding cooperation with the annular groove at the top of the cavity base 81, so that the annular groove of the cavity base 81 forms a pressure chamber. The jacking plate 84 is in sliding cooperation with the through hole at the bottom of the jacking seat 82. A spring 83 is connected between the top surface of the through hole at the bottom of the jacking plate 84 and the bottom of the jacking seat 82. The fourth motor 85 is fixed in the first bottom plate 41. One end of the rotating rod 86 is connected to the output end of the fourth motor 85, and the other end is provided with threads on the outside and is in threaded cooperation with the threaded hole on one side of the plug 87. The plug 87 is in sliding cooperation with the internal through hole of the first bottom plate 41. The plug 87 is inserted and cooperated with the side through hole of the cavity base 81. The first bottom plate 41 is provided with a ventilation hole 88 at the internal through hole where the plug 87 is located.

[0038] Combined with the attached Figure 1 and Figure 8As shown, the automatic decoupling device 6 is composed of a first hook 61, a second hook 62, a shear column 65 and a protective box 63. The shear column 65 passes through through-holes in the middle sections of the first hook 61 and the second hook 62, and is fixedly connected to the protective box 63 at both ends. The first hook 61 and the second hook 62 are hinged through the shear column 65. Rollers 64 are provided at the top ends of the first hook 61 and the second hook 62. The rollers 64 cooperate with the adjusting plate 7. A safety lock hole 66 is provided on one side of the protective box 63. The first hook 61 and the second hook 62 are safety-locked by inserting a pin into the safety lock hole 66 to block movement. The lifting rope 46 is fixedly connected to the top of the protective box 63.

[0039] Combined with the attached Figure 1 、 Figure 2 and Figure 9 As shown, the adjustable counterweight 5 is composed of a second bottom plate 51, a suspension column 52 and an insertion plate 53. The top of the second bottom plate 51 is fixedly connected to the suspension column 52. The through-hole at the center of the insertion plate 53 is in plug-in fit with the suspension column 52. The through-hole at the top of the suspension column 52 cooperates with the automatic decoupling device 6. A positioning rod 54 is fixedly provided at the top of the second bottom plate 51. The positioning rod 54 is in plug-in fit with the through-hole beside the insertion plate 53. Limit platforms 55 are provided on the side edges of the second bottom plate 51 and the insertion plate 53. When the second bottom plate 51 and the insertion plate 53 are in the assembled state, the limit platforms 55 form a continuous strip structure. The inner groove of the guide post 33 cooperates with the limit platform 55. There is a gap between the inner groove of the guide post 33 and the limit platform 55. The outer side of the positioning rod 54 is provided with threads, and the insertion plate 53 is fastened by a nut. The top surfaces of the second bottom plate 51 and the insertion plate 53 are smooth planes.

[0040] Combined with the attached Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, a wire hole 71 is provided at the center of the adjusting plate 7. The lifting rope 46 passes through the wire hole 71. Distance measuring through-holes 72 are provided on the adjusting plate 7. The distance measuring through-holes 72 are vertically aligned with the laser distance meter 49. The laser output by the laser distance meter 49 passes through the distance measuring through-holes 72 and hits the top surface of the adjustable counterweight 5 for distance measurement. A baffle 75 is provided at the position of the distance measuring through-hole 72 at the bottom of the adjusting plate 7. One end of the baffle 75 is fixedly provided with a turntable 74. The turntable 74 is in rotational fit with the adjusting plate 7. A boss 76 is fixedly provided at the bottom of the baffle 75. The top surface of the baffle 75 is in sliding fit with the ground of the adjusting plate 7. A top rod 77 is fixedly provided at the top of the adjusting plate 7. The top rod 77 passes through the first bottom plate 41 and is in contact fit with the lifting plate 84.

[0041] Combined with the attached Figure 5As shown, the third motor 47 is fixed on the first base plate 41. The output end of the third motor 47 is connected with a lifting rod 48. The lifting rod 48 passes through the first base plate 41 and is rotationally matched with the bottom of the inner groove of the functional beam 34. A limiting plate 73 is arranged on the side of the adjusting plate 7. The limiting plate 73 is in contact fit with the adjusting plate 7. The limiting plate 73 is in sliding fit with the inner groove of the functional beam 34. The outer side of the lifting rod 48 is provided with an external thread, which is matched with the threaded hole on the limiting plate 73.

[0042] Combined with the attached Figure 1 As shown, the second motor 42 is fixed on the first base plate 41. The wire winding drum 45 is fixed by the support member on the top of the first base plate 41. The output end of the second motor 42 is connected with a first gear 43. Both sides of the wire winding drum 45 are connected with second gears 44. The first gear 43 meshes with the second gears 44.

[0043] When the present invention is specifically implemented, Preparation Work 1: According to the specification requirements, the positions of the sensors installed on the pile head and the pile side are processed. Subsequently, the strain sensors are installed at the side position of the pile foundation, and the high-strain detector of the pile foundation is connected. The weight of the adjustable weight is adjusted according to the weight of the pile foundation or the vertical bearing capacity of a single pile. The adjustable weight is placed on the top of the pile foundation. Subsequently, the device is moved to the position of the pile foundation, so that the pile foundation is located at the center of the inner protective shell of the base, and the guiding columns are aligned with the limiting platforms. Subsequently, multiple first motors are started simultaneously. The threaded push rods are used to push multiple positioning columns to move at the same speed simultaneously, approaching the pile foundation. The positioning column that first comes into contact continues to move to apply a force to the pile foundation. Under the pushing of the reaction force of the pile foundation, the device moves by relying on the wheels, so that the opposite positioning columns approach the pile foundation. Finally, multiple positioning columns all come into contact with the pile foundation, realizing that the adjustable weight is automatically adjusted to be directly above the pile foundation. It can be understood that the center of the adjustable weight and the pile foundation are on the same vertical line. The first motors are turned off, and the hydraulic cylinder is started to push the hydraulic rod to drive the support plate to move downward, lifting the device. By adjusting the pushing distances of different hydraulic rods, the levelness of the device is adjusted.

[0044] Preparation Work 2: Turn on the laser rangefinder, open the baffle to measure the position of the top surface of the adjustable weight, and then close the baffle. Start the third motor. The lifting rod drives the limiting plate and then drives the adjusting plate to perform a lifting motion. The position of the adjusting plate is adjusted according to the position of the top surface of the weight. During the movement of the adjusting plate, the top rod contacts the jacking plate and drives the jacking seat to move up and down following the adjusting plate. The bottom of the annular groove in the cavity base is kept in balance with the external air pressure through the air vent holes. When the adjusting plate moves to the set position, start the fourth motor to make the rotating rod rotate, driving the blocking block to approach the cavity base, and finally blocking the through hole on the side of the cavity base, so that the annular groove of the cavity base forms a sealed pressure chamber. At this time, the cavity base and the jacking seat are kept in a fixed state. Subsequently, the automatic unhooking device is connected to the weight. The automatic unhooking device uses a pin to insert into the safety lock hole for safety locking, blocking the movement of the lifting hook to prevent accidental lifting contact.

[0045] Implementation work: Release the safety lock state of the automatic decoupling device, start Motor 2, drive the wire winding drum to rotate through the meshing transmission of Gear 1 and Gear 2, drive the lifting rope to drive the adjustable weight to lift. When the roller on the hook of the automatic decoupling device touches the adjusting plate, move outward, open Hook 1 and Hook 2, disconnect Hook 1 and Hook 2 from the hanging column, and the adjustable weight freely falls by gravity to hammer the pile body to complete the pile foundation detection work. During this process, the adjustable weight is coordinated with the limiting platform through the guiding column and the levelness of the device is adjusted, so that the bottom surface of the weight falls horizontally. After the roller of the automatic decoupling device touches the adjusting plate, the pulling force of the lifting rope is applied to the adjusting plate through the automatic decoupling device, causing the adjusting plate to move upward, disconnecting the adjusting plate from the limiting plate, and the ejector rod pushes the lifting plate upward. The spring buffers the lifting plate. After the lifting plate rises to the maximum distance, the lifting seat applies a reverse force to the adjusting plate through the lifting plate and the ejector rod to keep the adjusting plate fixed and open the automatic decoupling device.

[0046] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and without departing from the gist of the present invention creation, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A pile foundation detection device with a protection structure, comprising a pile foundation (1), a base (2), a protection frame (3) and an operation box (4). It is characterized in that: The base (2) is welded to the upper protection frame (3). The protection frame (3) is composed of connecting beams (31), support beams (32) and functional beams (34). A cylindrical support structure is formed by welding the connecting beams (31) with the support beams (32) and the functional beams (34). An adjustable weight (5), an automatic hook release device (6) and an adjusting plate (7) are arranged inside the protection frame (3). A bottom plate one (41) is provided at the bottom of the operation box (4), and the bottom plate one (41) is welded to the top of the protection frame (3). A motor two (42), a wire reel (45), a motor three (47) and a pressure-holding support device (8) are arranged inside the operation box (4). The top of the automatic hook release device (6) is connected with a lifting rope (46). The lifting rope (46) passes through the adjusting plate (7) and the through hole on the protection frame (3) and is wound and stored on the wire reel (45). A laser rangefinder (49) is arranged on the inner side of the top of the protection frame (3). The base (2) is composed of an outer protection shell (27), an inner protection shell (28), a connecting plate (29), a central positioning device and a horizontal adjusting device. The outer protection shell (27) and the inner protection shell (28) are welded and connected to the connecting plate (29). The central positioning device is composed of a motor one (21), a threaded push rod (22) and a positioning column (23). The horizontal adjusting device is composed of a hydraulic cylinder (24), a hydraulic rod (25) and a support plate (26). The pressure-holding support device (8) is composed of a cavity base (81), a jacking seat (82), a secondary jacking plate (84), a motor four (85), a rotating rod (86) and a plug (87). The cavity base (81) is fixed in the top groove of the bottom plate one (41). The bottom of the jacking seat (82) is slidably matched with the annular groove at the top of the cavity base (81), so that the annular groove of the cavity base (81) forms a pressure chamber. The secondary jacking plate (84) is slidably matched with the through hole at the bottom of the jacking seat (82). A spring (83) is connected between the secondary jacking plate (84) and the top surface of the through hole at the bottom of the jacking seat (82). The motor four (85) is fixed inside the bottom plate one (41). One end of the rotating rod (86) is connected to the output end of the motor four (85), and the other end is provided with a thread that is matched with the threaded hole on one side of the plug (87). The plug (87) is slidably matched with the internal through hole of the bottom plate one (41). The plug (87) is inserted and matched with the side through hole of the cavity base (81). The bottom plate one (41) is provided with a vent hole (88) at the internal through hole where the plug (87) is located. The third motor (47) is fixed on the first base plate (41). The output end of the third motor (47) is connected with a lifting rod (48). The lifting rod (48) passes through the first base plate (41) and is in rotational cooperation with the bottom of the inner groove of the functional beam (34). A limiting plate (73) is arranged on the side of the adjusting plate (7). The limiting plate (73) is in contact cooperation with the adjusting plate (7). The limiting plate (73) is in sliding cooperation with the inner groove of the functional beam (34). The outer side of the lifting rod (48) is provided with an external thread, which is in cooperation with the threaded hole on the limiting plate (73). A top rod (77) is fixedly arranged on the top of the adjusting plate (7). The top rod (77) passes through the first base plate (41) and is in cooperation with the pressure maintaining and supporting device (8).

2. A pile foundation detection device with a protection structure according to claim 1, characterized in that: A plurality of center positioning devices and horizontal adjusting devices are evenly arranged in the base (2). The center positioning devices and the horizontal adjusting devices are arranged at intervals and staggered. The first motor (21) is fixed on the connecting plate (29). The output end of the first motor (21) is connected with a threaded push rod (22). The threaded push rod (22) is in threaded cooperation with the threaded hole on one side of the positioning column (23). The positioning column (23) passes through the side through hole of the inner protective shell (28) and is in sliding cooperation with the inner protective shell (28). The hydraulic cylinder (24) is fixed at the bottom of the connecting plate (29). The hydraulic cylinder (24) is in cooperation with the hydraulic rod (25). The bottom of the hydraulic rod (25) is hinged to the support plate (26).

3. A pile foundation detection device with a protection structure according to claim 1, characterized in that: The adjustable weight (5) is composed of a second base plate (51), a suspension column (52) and an insertion plate (53). The top of the second base plate (51) is fixedly connected with the suspension column (52). The through hole at the center of the insertion plate (53) is in plug-in cooperation with the suspension column (52). The through hole at the top of the suspension column (52) is in cooperation with the automatic hook release device (6). A positioning rod (54) is fixedly arranged on the top of the second base plate (51). The positioning rod (54) is in plug-in cooperation with the side through hole of the insertion plate (53). Limiting platforms (55) are arranged on the sides of the second base plate (51) and the insertion plate (53). When the second base plate (51) and the insertion plate (53) are in the assembled state, the limiting platforms (55) form a continuous strip structure. The outer side of the positioning rod (54) is provided with a thread, and the insertion plate (53) is fastened by a nut. The top surfaces of the second base plate (51) and the insertion plate (53) are smooth planes.

4. A pile foundation detection device with a protection structure according to claim 1, characterized in that: The described automatic decoupling device (6) is composed of a first hook (61), a second hook (62), a shear column (65) and a protective box (63). The shear column (65) passes through the through holes in the middle sections of the first hook (61) and the second hook (62), and is fixedly connected to the protective box (63) at both ends. The first hook (61) and the second hook (62) are hinged through the shear column (65). Rollers (64) are provided at the tops of the first hook (61) and the second hook (62). The rollers (64) cooperate with the adjusting plate (7). A safety lock hole (66) is provided on one side of the protective box (63). The first hook (61) and the second hook (62) are safety locked by inserting a pin into the safety lock hole (66) to block movement.

5. A pile foundation detection device with a protection structure according to claim 1, characterized in that: A wire hole (71) is provided at the center of the adjusting plate (7). The lifting rope (46) passes through the wire hole (71). Distance measuring through holes (72) are provided on the adjusting plate (7). The distance measuring through holes (72) are vertically aligned with the laser distance meter (49). The laser output by the laser distance meter (49) passes through the distance measuring through holes (72) and hits the top surface of the adjustable plumb bob (5) for distance measurement. A baffle (75) is provided at the bottom of the adjusting plate (7) at the position of the distance measuring through hole (72). One end of the baffle (75) is fixedly provided with a turntable (74). The turntable (74) is rotationally matched with the adjusting plate (7). A convex platform (76) is fixedly provided at the bottom of the baffle (75). The top surface of the baffle (75) is slidably matched with the bottom surface of the adjusting plate (7).

6. A pile foundation detection device with a protection structure according to claim 1, characterized in that: The second motor (42) is fixed on the first base plate (41). The wire winding drum (45) is fixed through the support member at the top of the first base plate (41). The output end of the second motor (42) is connected with a first gear (43). Gear two (44) is connected to both sides of the wire winding drum (45). The first gear (43) meshes with the second gear (44).

7. A pile foundation detection device with a protection structure according to claim 3, characterized in that: A guide post (33) is fixedly provided inside the support beam (32). The inner groove of the guide post (33) cooperates with the limiting platform (55). There is a gap between the inner groove of the guide post (33) and the limiting platform (55).

8. A pile foundation detection device with a protection structure according to claim 1, characterized in that: Multiple inclined braces (9) are fixedly provided at the top of the base (2). The inclined braces (9) are fixedly connected to the protective frame (3). Multiple wheels are provided at the bottom of the outer protective shell (27).

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