A building pile foundation integrity detection device

Abstract

The application discloses a kind of building pile foundation integrity detection device in the field of building detection, including fixed unit, detection unit and knocking unit, the detection unit is slidably connected on fixed unit, one end of knocking unit is fixedly connected on the side of fixed unit, and the other end extends to the position above the axis of fixed unit.The present application can quickly install and fix the device as a whole on the pile body by setting the fixed unit, providing convenience for subsequent pile detection operation.The fixed unit includes four groups of fixed components that can move inwardly along the circumferential direction synchronously, and through the inwardly converging action of multiple groups of fixed components, the installation and fixation of the device and the pile body can be quickly completed, effectively improving the installation efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of building inspection technology, and in particular to a device for detecting the integrity of building pile foundations. Background Technology

[0002] Pile foundation integrity is a comprehensive qualitative indicator reflecting the relative changes in the cross-sectional dimensions of the pile foundation, the density and continuity of the pile foundation material. By detecting pile foundation integrity, defects that may affect the bearing capacity of a single pile can be discovered, thereby reducing safety hazards. The main methods for detecting pile foundation integrity include low-strain method, sonic logging method, high-strain method, and core drilling method. When using the low-strain method to detect pile foundation integrity, low-energy transient or steady-state excitation is applied to the top of the pile. The sensor is fixed at 2 / 3 of the radius from the center of the pile. Vertical excitation at the center of the pile top generates elastic waves. The elastic waves propagate along the pile body and generate reflected waves when they encounter defects or changes in cross-section. After receiving the reflected signals, the sensors amplify, filter, and process the data. By analyzing the reflection information and combining the relationship between wave velocity, pile length, and reflection time, the integrity of the pile foundation concrete, the actual length, the degree of defects, and their location can be determined.

[0003] However, when testing pile foundations, existing technologies typically require measurements at multiple locations on the pile top to ensure the accuracy of the test data. Each time the sensor position is changed, staff need to measure and mark the pile top with a measuring ruler to ensure that the sensor installation position is located at 2 / 3 radius from the pile center. This traditional method makes the sensor installation position adjustment process cumbersome and inefficient, and cannot achieve rapid adjustment and positioning of the sensor installation position, thus failing to meet the work requirements of high-efficiency measurement. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention proposes a building pile foundation integrity detection device to solve such problems.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a building pile foundation integrity detection device, comprising a fixing unit, a detection unit and a striking unit, wherein the detection unit is slidably connected to the fixing unit, one end of the striking unit is fixedly connected to the side of the fixing unit, and the other end extends above the axial position of the fixing unit. The fixing unit includes a ring-shaped fixing component, a drive ring sleeved on the fixing component and the two being concentric and coaxial, multiple sets of fixing components arranged around the fixing component, each set of fixing components being arranged with its inner end facing the axis of the fixing component, a long gear connected to the side of each set of fixing components, and a drive module arranged on the side of the fixing component.

[0006] As a preferred embodiment of the building pile foundation integrity detection device of the present invention, the fixing component includes a base with an annular structure, an upper seat disposed on the upper end of the base, an installation groove located between the base and the upper seat, and a drive ring installed in the installation groove, multiple sets of limiting grooves equally spaced around the base, and multiple sets of fixing components correspondingly inserted into the multiple sets of limiting grooves, and a sliding groove disposed on the upper seat, and the lower end of the detection unit is slidably connected in the sliding groove.

[0007] As a preferred embodiment of the building pile foundation integrity detection device of the present invention, the drive ring is rotatably connected between the base and the upper seat, the outer wall of the drive ring is provided with external teeth, and the drive module meshes with the external teeth for transmission, the inner wall of the drive ring is provided with internal teeth, and the upper end of the long gear meshes with the internal teeth for transmission.

[0008] As a preferred embodiment of the building pile foundation integrity detection device of the present invention, the fixing component includes a fixing rod inserted into the limiting groove, side teeth formed on the side of the fixing rod, and the lower outer wall of the long gear meshing with the side teeth for transmission, and a buffer plate with an arc structure disposed at the inner end of the fixing rod.

[0009] As a preferred embodiment of the building pile foundation integrity detection device of the present invention, the drive module includes a drive rod that meshes with external teeth for transmission, and a drive motor disposed at one end of the drive rod.

[0010] As a preferred embodiment of the building pile foundation integrity detection device of the present invention, the detection unit includes a slider extending into a sliding groove, a fixed seat disposed at the upper end of the slider, the lower end of the fixed seat being attached to the top surface of the upper seat, and a limiting spring disposed between the fixed seat and the slider.

[0011] As a preferred embodiment of the building pile foundation integrity testing device of the present invention, the testing unit further includes a threaded sleeve horizontally disposed on the fixed seat and rotatably connected to the fixed seat, an extension rod horizontally inserted into the threaded sleeve, a limiting rod horizontally inserted into the fixed seat, and an installation sleeve fixedly connected to the outer end of the extension rod, and the outer end of the limiting rod is also connected to the installation sleeve.

[0012] As a preferred embodiment of the building pile foundation integrity detection device of the present invention, the threaded sleeve has a threaded groove inside, one end of the extension rod extends into the threaded groove, and a threaded shaft is provided on the end of the extension rod that extends into the threaded groove, and the threaded shaft and the threaded groove are threadedly connected.

[0013] As a preferred embodiment of the building pile foundation integrity detection device of the present invention, wherein: an installation rod is vertically inserted into the installation sleeve, a rectangular slot is vertically opened in the installation sleeve, limiting blocks matching the slot size are provided on both sides of the installation rod, a guide frame with arc-shaped structure on both sides is provided at the lower end of the installation rod, a support spring is sleeved on the lower end of the installation rod and located between the installation sleeve and the guide frame, and a detection sensor is provided in the guide frame.

[0014] As a preferred embodiment of the building pile foundation integrity testing device of the present invention, the striking unit includes a fixed frame fixedly connected to the side of the fixed component, the inner end of the fixed frame extending to the axial position of the fixed component, a sleeve disposed at the inner end of the fixed frame, a hammer head inserted into the sleeve, the upper end of the hammer head being slidably connected to the sleeve, a return spring disposed between the hammer head and the sleeve, a side rack disposed on the side of the hammer head and extending to the outside of the sleeve, and a drive gear disposed on the side of the sleeve, wherein the drive gear meshes with the side rack for transmission.

[0015] The beneficial effects of the present invention are as follows: by setting a fixing unit, the entire device can be quickly installed and fixed on the pile body, which provides convenience for subsequent pile body inspection operations. The fixing unit includes four sets of fixing components that can move synchronously inward along the circumferential direction. Through the action of multiple sets of fixing components moving inward in the circumference, the installation and fixing of the device and the pile body can be completed quickly, which effectively improves the installation efficiency of the device. Meanwhile, the distance by which multiple fixed components converge and extend inward can be dynamically adjusted flexibly according to the actual diameter of the pile, thus enabling the device to meet the requirements for testing piles of various diameters and providing strong flexibility in use. Furthermore, the four sets of fixing components are evenly distributed around the pile body. Therefore, the action of the four sets of fixing components converging inward around the circumference is a uniform movement from the periphery of the pile body inward. Thus, the four sets of fixing components can achieve four-needle centering operation, so that the device can quickly locate the center of the pile body while completing the installation and fixing, thereby facilitating the subsequent calculation and confirmation of the sensor installation position. The sensor position can be adjusted by setting up a detection unit that can slide in a circular direction on a fixed unit. After the fixed unit is installed and fixed on the pile, the outer end of the detection unit is simply extended laterally to a distance of 2 / 3 of the radius from the center of the pile. Subsequently, the detection unit can be pushed to slide in a circular direction along the fixed unit to flexibly adjust the position of the sensor. The sensor installation position after each adjustment is always located at 2 / 3 of the radius from the center of the pile, which effectively ensures the accuracy of the detection data and makes the sensor position adjustment more convenient and faster. By setting up a striking unit, the automatic striking action of the pile is realized. The striking unit strikes the pile in a mechanical way, which can ensure the evenness of the striking force compared with manual striking, thus ensuring the accuracy of the measurement data. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the building pile foundation integrity detection device of the present invention.

[0017] Figure 2 This is a schematic diagram showing the installation status of the building pile foundation integrity detection device of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the fixing unit of the building pile foundation integrity detection device of the present invention.

[0019] Figure 4 This invention relates to a building pile foundation integrity detection device. Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0020] Figure 5 This is a schematic diagram of the structure of the fixing component of the building pile foundation integrity detection device of the present invention.

[0021] Figure 6 This is a schematic diagram of the internal structure of the building pile foundation integrity detection device of the present invention.

[0022] Figure 7 This invention relates to a building pile foundation integrity detection device. Figure 6 Enlarged schematic diagram of the structure at point B.

[0023] Figure 8 This is a schematic diagram of the structure of the detection unit of the building pile foundation integrity detection device of the present invention.

[0024] Figure 9 This is a structural schematic diagram showing the connection position between the mounting sleeve and the mounting rod of the building pile foundation integrity detection device of the present invention.

[0025] Figure 10 This is a top view of the building pile foundation integrity detection device of the present invention.

[0026] Reference numerals: 1. Fixing unit; 2. Detection unit; 21. Fixing base; 211. Limiting rod; 22. Slider; 23. Limiting spring; 24. Threaded sleeve; 241. Threaded groove; 25. Extension rod; 251. Threaded shaft; 26. Mounting sleeve; 261. Slot; 27. Mounting rod; 271. Limiting block; 28. Guide frame; 29. ​​Support spring; 30. Detection sensor; 3. Impact unit; 31. Fixing frame; 32. Sleeve 33. Hammer head; 34. Return spring; 35. Side rack; 36. Drive gear; 4. Fixing component; 41. Base; 42. Upper seat; 43. Mounting slot; 44. Limiting slot; 45. Sliding slot; 5. Drive ring; 51. External tooth; 52. Internal tooth; 6. Fixing assembly; 61. Fixing rod; 62. Side tooth; 63. Buffer plate; 7. Long gear; 8. Drive module; 81. Drive rod; 82. Drive motor; 9. Pile body. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of the present invention more readily understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0029] Reference Figures 1 to 10 According to an embodiment of the present invention, a building pile foundation integrity testing device includes a fixing unit 1, a testing unit 2, and a striking unit 3. The testing unit 2 is slidably connected to the fixing unit 1. One end of the striking unit 3 is fixedly connected to the side of the fixing unit 1, and the other end extends above the axial position of the fixing unit 1. The fixing unit 1 is used to install and fix the entire device on the pile body 9, providing stable support for subsequent testing work. The testing unit 2 is used to collect testing data, and the striking unit 3 is used to realize the automated striking of the pile body 9. Reference Figure 3 The fixing unit 1 includes a ring-shaped fixing component 4, a drive ring 5 sleeved on the fixing component 4 and both being concentric and coaxial, multiple sets of fixing components 6 arranged around the fixing component 4, and each set of fixing components 6 being arranged with its inner end facing the axis of the fixing component 4, a long gear 7 connected to the side of each set of fixing components 6, and a drive module 8 arranged on the side of the fixing component 4. The multiple sets of fixing components 6 clamp the pile body 9 by converging inward, thereby connecting the fixing unit 1 and the pile body 9. The drive module 8 is used to drive the drive ring 5 to rotate on the fixing component 4. Under normal conditions, the drive module 8 is externally protected by a shell.

[0030] Reference Figure 5 The fixing component 4 includes a ring-shaped base 41, an upper seat 42 disposed on the upper end of the base 41, a mounting groove 43 located between the base 41 and the upper seat 42, and a drive ring 5 installed in the mounting groove 43, multiple sets of equal-divided limiting grooves 44 are opened around the base 41, and multiple sets of fixing components 6 are correspondingly inserted into the multiple sets of limiting grooves 44, and a sliding groove 45 is opened on the upper seat 42, and the lower end of the detection unit 2 is slidably connected in the sliding groove 45. The overall ring structure of the base 41 can better fit the pile body 9. The base 41 and the upper seat 42 are fixedly connected, and the limiting groove 44 opened between the two will not disconnect the connection between the two, while the drive ring 5 is rotatably connected to the part connecting the two.

[0031] Combination Figure 3 and Figure 4 The drive ring 5 is rotatably connected between the base 41 and the upper seat 42. The outer wall of the drive ring 5 is provided with external teeth 51, and the drive module 8 meshes with the external teeth 51 for transmission. The inner wall of the drive ring 5 is provided with internal teeth 52, and the upper end of the long gear 7 meshes with the internal teeth 52 for transmission. Through the meshing transmission between the long gear 7 and the internal teeth 52, the drive ring 5 can rotate axially on the fixed part 4.

[0032] Reference Figure 3 The fixing component 6 includes a fixing rod 61 inserted into the limiting groove 44, side teeth 62 formed on the side of the fixing rod 61, and the lower outer wall of the long gear 7 meshing with the side teeth 62 for transmission, and a buffer plate 63 with an arc structure set in the inner end of the fixing rod 61. The fixing rod 61 is limited by the limiting groove 44 and can only extend and retract within the limitation of the limiting groove 44. The meshing of the side teeth 62 with the long gear 7 allows the long gear 7 to push the fixing component 6 to move as a whole through the teeth. The buffer plate 63 is made of rubber and has a certain degree of energy absorption and wear resistance, further extending the service life of the fixing component 6.

[0033] Reference Figure 3 and Figure 4 The drive module 8 includes a drive rod 81 that meshes with the external gear 51, and a drive motor 82 located at one end of the drive rod 81. The drive motor 82 drives the drive rod 81 to rotate. The drive rod 81 meshes with the external gear 51 through its own helical rack, thereby driving the drive ring 5 to rotate on the fixed component 4. At the same time, the mutual cooperation between the external gear 51 and the drive rod 81 forms a worm gear structure. This structure not only has a transmission effect but also has a self-locking capability. Therefore, it can limit the fixed component 6, which is subsequently driven by the drive ring 5 and the long gear 7, to a specified state, ensuring the installation stability of the fixed component 6 on the pile body 9.

[0034] Combination Figure 2 , Figure 3 as well as Figure 10 When the device is installed and fixed onto the pile body 9 using the fixing unit 1, the fixing component 4 is sleeved on the top of the pile body 9. Subsequently, the drive module 8 drives the drive ring 5 to rotate through the meshing of the drive rod 81 and the external teeth 51. The rotating drive ring 5 drives multiple sets of long gears 7 to rotate through the internal teeth 52. At this time, the rotating long gears 7, through meshing with the side teeth 62, push the fixing component 6 to move horizontally along the limiting groove 44. Multiple sets of fixing components 6 are synchronously pushed by their respective long gears 7, thereby causing multiple sets of fixing components 6 to synchronously perform an inward convergence operation. The inner end of the inwardly converged fixing component 6 will eventually fit against the outer wall of the pile body 9. Through the synchronous cooperation of multiple sets of fixing components 6, the fixing unit 1 can be firmly connected and fixed to the top of the pile body 9, thereby facilitating subsequent work. Reference Figure 8 The detection unit 2 includes a slider 22 extending into the sliding groove 45, a fixed seat 21 disposed on the upper end of the slider 22 with the lower end of the fixed seat 21 abutting against the top surface of the upper seat 42, and a limiting spring 23 disposed between the fixed seat 21 and the slider 22. The limiting spring 23, through its own elasticity, allows the fixed seat 21 to be limited and abutting against the upper part of the fixed component 4 in the normal state. The slider 22, by extending into the sliding groove 45, is limited by the sliding groove 45, and therefore can only slide within the sliding groove 45. The sliding groove 45 is a circular structure, thus allowing the detection unit 2 to perform circumferential position adjustment with the fixed component 4 as the axis under the limitation of the sliding groove 45.

[0035] Reference Figure 8 The detection unit 2 also includes a threaded sleeve 24 that is laterally disposed on the fixed base 21 and is rotatably connected to the fixed base 21, an extension rod 25 that is laterally inserted into the threaded sleeve 24, a limiting rod 211 that is laterally inserted into the fixed base 21, and a mounting sleeve 26 that is fixedly connected to the outer end of the extension rod 25. The outer end of the limiting rod 211 is also connected to the mounting sleeve 26. The extension rod 25 and the limiting rod 211 are mutually limited by the mounting sleeve 26, and neither of them can rotate independently.

[0036] Reference Figure 7The threaded sleeve 24 has a threaded groove 241 inside. One end of the extension rod 25 extends into the threaded groove 241, and a threaded shaft 251 is provided on the end of the extension rod 25 that extends into the threaded groove 241. The threaded shaft 251 and the threaded groove 241 are threadedly connected. When the threaded sleeve 24 rotates, the extension rod 25 is limited by the limiting rod 211 and cannot rotate synchronously with the threaded sleeve 24. At this time, the threaded groove 241 will push the extension rod 25 to move horizontally within the threaded sleeve 24 through the threaded connection with the threaded shaft 251. The horizontally moving extension rod 25 can adjust the position of the detection sensor 30 horizontally, so that the detection sensor 30 can flexibly adjust its position according to the actual size of the pile body 9, further improving the overall practicality of the device.

[0037] Reference Figure 9 An installation rod 27 is vertically inserted into the installation sleeve 26. A rectangular slot 261 is vertically opened in the installation sleeve 26. Limiting blocks 271 of matching size to the slot 261 are provided on both sides of the installation rod 27. A guide frame 28 with arc-shaped structure on both sides is provided at the lower end of the installation rod 27. A support spring 29 is sleeved at the lower end of the installation rod 27 and located between the installation sleeve 26 and the guide frame 28. A detection sensor 30 is provided in the guide frame 28. The detection sensor 30 is a mature sensor device in the prior art.

[0038] During use, the mounting rod 27 is vertically inserted into the mounting sleeve 26. The support spring 29, through its own elasticity, pushes the guide frame 28 located at the lower end of the mounting rod 27 downwards, thereby ensuring that the detection sensor 30 located within the guide frame 28 is tightly fitted against the top wall of the pile body 9. The limiting blocks 271 on both sides of the mounting rod 27 can be vertically aligned with the slot 261 by rotation. When the two are vertically aligned, the mounting rod 27, driven by the elasticity of the support spring 29, can move vertically within the mounting sleeve 26. When the limiting block 271 does not vertically coincide with the slot 261, the mounting rod 27 will extend upwards and lock itself onto the mounting sleeve 26. At this time, the guide frame 28 and the detection sensor 30 located below the mounting rod 27 will also be stretched upwards. The detection sensor 30 will be in a higher horizontal position and will not contact the pile body 9. Therefore, by dynamically adjusting the state of the mounting rod 27, the switching operation between the position state of the detection sensor 30 and the pile body 9 can be realized, thereby better assisting in the overall position adjustment of the detection unit 2. In summary, by employing four sets of fixing components 6 that can synchronously converge inward along the circumference, and with the aid of an advanced synchronous drive mechanism, it is possible to ensure that the multiple sets of fixing components 6 maintain a highly consistent movement speed and rhythm in the circumferential direction. This synchronous inward convergence action can quickly complete the installation and fixation of the device to the pile body 9. Furthermore, the distance the multiple sets of fixing components 6 extend inward can be flexibly and dynamically adjusted according to the actual diameter of the pile body 9. This allows the device to meet the requirements of testing pile bodies 9 of various diameters, providing strong flexibility in use. Moreover, the four sets of fixing components 6 are evenly distributed around the pile body. The four sets of fixing components 6 are placed around the pile body 9, forming a symmetrical layout. Therefore, the movement of the four sets of fixing components 6 converging inward from the circumference of the pile body 9 is uniform. This uniform force application method enables the four-needle centering operation. During the installation and fixing process, the four sets of fixing components 6 can accurately find the center position of the pile body 9. This allows the device to quickly locate the center of the pile body 9 while completing the installation and fixing. This precise center positioning can greatly facilitate the subsequent calculation and confirmation of the sensor fixing position, eliminating the need for additional measurement and adjustment, and greatly improving the efficiency and accuracy of the overall workflow.

[0039] Furthermore, in combination Figure 8 When the detection unit 2 rotates around the fixed component 4 to adjust its position, there may be obstructions such as protrusions or horizontally outward-facing steel bars on the top wall of the pile body 9. At this time, the curved structure on both sides of the guide frame 28 will convert the force of the lateral contact between the guide frame 28 and the obstruction into a force that pushes the guide frame 28 upward through its own arc angle. This causes the mounting rod 27 to drive the detection sensor 30 to move upward as a whole, so that the obstruction will not hinder the moving detection unit 2, avoid delaying the position adjustment of the detection unit 2, and further enhance the flexibility of the device.

[0040] Reference Figure 7 and Figure 10When adjusting the position of detection unit 2, the entire device is fixed to the upper end of pile 9 by fixing unit 1. At this time, the center positioning operation of pile 9 has been completed by fixing unit 1. Then, according to the actual size of pile 9, the position of detection sensor 30 is adjusted laterally: by rotating threaded sleeve 24, extension rod 25 can be driven to push detection sensor 30 located below its outer end to move horizontally. Continue rotating threaded sleeve 24 until detection sensor 30 is at a radius of 2 / 3 from the pile center. Then switch the state of mounting rod 27 so that limit block 271 coincides with slot 261. At this time, support spring 29 will use its own elasticity to push detection sensor 30 downward against the top wall of pile 9, thereby completing the initial position fixing operation of detection sensor 30. When it is necessary to detect other positions at a radius of 2 / 3 from the pile center, detection unit 2 can be pushed along sliding groove 45. Furthermore, the extension rod 25 keeps the outward extension length of the detection sensor 30 constant. The detection unit 2, in cooperation with the slider 22 and the sliding groove 45, moves the detection sensor 30 to a position within a radius of 2 / 3 from the pile center. In summary, by adjusting the horizontal distance of the detection sensor 30 once, the position of the detection sensor 30 can be adjusted in any circumferential direction within a radius of 2 / 3 from the pile center. Compared to traditional position adjustment methods, this design effectively simplifies the operation steps, making the position adjustment of the detection sensor 30 more convenient. Simultaneously, the mechanized adjustment method ensures that the installation position of the detection sensor 30 is accurately located within a radius of 2 / 3 from the pile center after each adjustment, fundamentally avoiding errors that may arise from manual adjustment. This effectively guarantees the accuracy and consistency of the detection data, significantly improving the efficiency and reliability of the detection work.

[0041] Reference Figure 6 The striking unit 3 includes a fixing frame 31 fixedly connected to the side of the fixing component 4, with the inner end of the fixing frame 31 extending to the axial position of the fixing component 4; a sleeve 32 disposed at the inner end of the fixing frame 31; a hammer head 33 inserted into the sleeve 32, with the upper end of the hammer head 33 slidably connected to the sleeve 32; a return spring 34 disposed between the hammer head 33 and the sleeve 32; a side rack 35 disposed on the side of the hammer head 33 and extending to the outside of the sleeve 32; and a drive gear 36 disposed on the side of the sleeve 32. The drive gear 36 meshes with the side rack 35 for transmission. The fixing frame 31 has an overall L-shaped structure. The sleeve 32 and hammer head 33 are vertically set at the center of the equipment through the inner end, so that they are on the core of the pile body 9 during installation. At the same time, the fixing frame 31 is also a part for holding, which facilitates the carrying and transportation of the whole equipment. The drive gear 36 has a motor connected to its side for driving. The drive gear 36 has a half gear structure, that is, half of the outer diameter of the drive gear 36 does not have teeth.

[0042] During equipment use, combined with Figure 6 and Figure 10 After the entire device is installed and fixed at the top of the pile body 9, the detection sensor 30 is tightly attached to the top wall of the pile body 9. Subsequently, the drive gear 36, through meshing with the side rack 35, pushes the hammer head 33 upward to retract into the sleeve 32. During the upward movement of the hammer head 33, the return spring 34 is compressed to retract and store force. As the drive gear 36 continues to rotate, the side of the drive gear 36 with the gear will eventually disengage from the side rack 35. At this time, the meshing between the side rack 35 and the drive gear 36 pushes... When the force disappears, the return spring 34 extends outward to release energy, which in turn pushes the hammer head 33 to fall vertically and strike the top wall of the pile body 9 instantly, causing a vertical excitation elastic wave to be generated at the center of the pile top. The auxiliary detection sensor 30 completes the detection work. In summary, by setting the striking unit 3, the automatic striking of the pile body 9 can be realized. This mechanized striking method can accurately regulate the striking force, instantaneous falling speed and striking interval time. Compared with manual striking, it can ensure that the striking force is uniform and stable, thereby effectively ensuring the accuracy of the measurement data.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for detecting the integrity of building pile foundations, comprising a fixing unit (1), a detection unit (2), and a tapping unit (3), characterized in that: The detection unit (2) is slidably connected to the fixed unit (1), one end of the striking unit (3) is fixedly connected to the side of the fixed unit (1), and the other end extends to the center of the fixed unit (1); the fixed unit (1) includes a ring-shaped fixed component (4), a drive ring (5) sleeved on the fixed component (4) and the two are concentric and coaxial, multiple sets of fixed components (6) arranged around the fixed component (4), and each set of fixed components (6) is arranged with its inner end facing the center of the fixed component (4), a long gear (7) connected to the side of each set of fixed components (6), and a drive module (8) arranged on the side of the fixed component (4); the detection unit (2) is slidably connected to the fixed unit (1), one end of the striking unit (3) is fixedly connected to the side of the fixed unit (1), and the other end extends to the center of the fixed unit (1); the detection unit (2) is slidably connected to the fixed unit (1), one end of the striking unit (3) is fixedly connected to the side of the fixed unit (1), and the other end extends to the center of the fixed unit (1); the detection unit (2) is slidably connected to the fixed unit (1), one end of the striking unit (3) is fixedly connected to the side of the fixed unit (1), and the other end extends to the center of the fixed unit (1); the fixed ... The element (2) includes a slider (22), a fixed seat (21) set on the upper end of the slider (22), and the lower end of the fixed seat (21) is attached to the top surface of the upper seat (42), a limiting spring (23) set between the fixed seat (21) and the slider (22), a threaded sleeve (24) set laterally on the fixed seat (21), and the threaded sleeve (24) is rotatably connected to the fixed seat (21), an extension rod (25) inserted laterally in the threaded sleeve (24), a limiting rod (211) inserted laterally on the fixed seat (21), and a mounting sleeve (26) fixedly connected to the outer end of the extension rod (25), and the outer end of the limiting rod (211) is also connected to the mounting sleeve (26).

2. The building pile foundation integrity detection device according to claim 1, characterized in that: The fixing component (4) includes a ring-shaped base (41), an upper seat (42) disposed on the upper end of the base (41), an installation groove (43) located between the base (41) and the upper seat (42), and a drive ring (5) installed in the installation groove (43), multiple sets of circumferentially divided limiting grooves (44) opened on the base (41), and multiple sets of fixing components (6) correspondingly inserted into the multiple sets of limiting grooves (44), and a sliding groove (45) opened on the upper seat (42), and the lower end of the detection unit (2) is slidably connected in the sliding groove (45).

3. The building pile foundation integrity testing device according to claim 2, characterized in that: The drive ring (5) is rotatably connected between the base (41) and the upper seat (42). The outer wall of the drive ring (5) is provided with external teeth (51), and the drive module (8) meshes with the external teeth (51) for transmission. The inner wall of the drive ring (5) is provided with internal teeth (52), and the upper end of the long gear (7) meshes with the internal teeth (52) for transmission.

4. The building pile foundation integrity detection device according to claim 2, characterized in that: The fixing component (6) includes a fixing rod (61) inserted into the limiting groove (44), side teeth (62) opened on the side of the fixing rod (61), and the lower outer wall of the long gear (7) meshes with the side teeth (62) for transmission, and a buffer plate (63) with an arc structure disposed on the inner end of the fixing rod (61).

5. The building pile foundation integrity testing device according to claim 3, characterized in that: The drive module (8) includes a drive rod (81) that meshes with the external teeth (51) for transmission, and a drive motor (82) disposed at one end of the drive rod (81).

6. The building pile foundation integrity detection device according to claim 1, characterized in that: The threaded sleeve (24) has a threaded groove (241) inside. One end of the extension rod (25) extends into the threaded groove (241), and a threaded shaft (251) is provided on the end of the extension rod (25) that extends into the threaded groove (241). At the same time, the threaded shaft (251) and the threaded groove (241) are threadedly connected.

7. The building pile foundation integrity testing device according to claim 1, characterized in that: An installation rod (27) is vertically inserted into the installation sleeve (26). A rectangular slot (261) is vertically opened inside the installation sleeve (26). Limiting blocks (271) matching the size of the slot (261) are provided on both sides of the installation rod (27). A guide frame (28) with an arc structure on both sides is provided at the lower end of the installation rod (27). A support spring (29) is sleeved on the lower end of the installation rod (27) and located between the installation sleeve (26) and the guide frame (28). A detection sensor (30) is provided inside the guide frame (28).

8. The building pile foundation integrity testing device according to claim 1, characterized in that: The striking unit (3) includes a fixed frame (31) fixedly connected to the side of the fixed component (4), and the inner end of the fixed frame (31) extends to the axial position of the fixed component (4), a sleeve (32) set at the inner end of the fixed frame (31), a hammer head (33) inserted into the sleeve (32), and the upper end of the hammer head (33) being limited and slidably connected to the sleeve (32), a reset spring (34) set between the hammer head (33) and the sleeve (32), a side rack (35) set on the side of the hammer head (33) and extending to the outside of the sleeve (32), and a drive gear (36) set on the side of the sleeve (32), and the drive gear (36) meshing with the side rack (35) for transmission.

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