Pretreatment device and method for ultrasonic detection of foundation pile

Abstract

The invention provides a foundation pile ultrasonic detection pretreatment device and method. The device comprises a positioning piece, a rotating platform, an inserting piece and a lifting piece. The rotating platform is rotationally arranged on the upper side of the positioning piece, and an alignment piece is arranged on the lower side of the rotating platform; the plug connector is arranged on the alignment piece and is of a conical structure capable of being connected with the inner top of the sounding pipe. The lifting piece is slidably arranged on the inserting piece, a butt joint piece is arranged on the lower side of the lifting piece, and the lifting piece and the butt joint piece abut against the upper end face and the outer wall of the sounding pipe correspondingly. The rotating platform is provided with a first distance measuring element, the plug connector is provided with a second distance measuring element, the butt joint piece is provided with a third distance measuring element, and the lifting piece is provided with a fourth distance measuring element. According to the foundation pile ultrasonic detection preprocessing device and method, parameter measurement of a single sounding pipe and measurement of the interval calculation condition of a plurality of sounding pipes are achieved through cooperation of all the distance measuring elements, and the execution efficiency of the foundation pile ultrasonic detection preprocessing step is guaranteed.

Description

Technical Field

[0001] The present application belongs to the field of ultrasonic detection technology, and specifically relates to a pre-processing device and method for ultrasonic detection of pile foundations. Background Art

[0002] As a crucial support for building structures, the integrity of pile foundations directly impacts project safety. Construction companies typically use the acoustic transmission method to test pile integrity. During this process, workers embed two to four acoustic detection tubes inside the pile shaft and insert transducers into these tubes to collect acoustic wave propagation parameters, which are then used to assess pile defects.

[0003] Before executing the above steps, it is necessary to measure the distance between each acoustic detection pipe (such as Figure 1 and Figure 2 As shown in the figure, when there are four ultrasonic testing pipes, the four ultrasonic testing pipes are named A, B, C, and D respectively. At this time, six groups of values ​​AB, AC, AD, BC, BD, and CD need to be measured. The outer diameter, inner diameter, and exposed length of each ultrasonic testing pipe also need to be measured. For the sake of convenience, the above process is referred to as the preprocessing step of ultrasonic testing of pile foundations.

[0004] In the existing technology, the preprocessing step needs to be performed manually, and the tools used during the process are relatively simple, which leads to an increase in the number of operating steps. While reducing the overall efficiency, it is also easy to produce data errors, affecting the subsequent evaluation process. It is not suitable for current ultrasonic testing of pile foundations. Summary of the Invention

[0005] The embodiments of the present application provide a preprocessing device and method for ultrasonic detection of pile foundations, which can simplify the operating steps and achieve the technical purpose of quickly executing the preprocessing steps. On the basis of reducing manpower input, the reliability of the measurement results in the preprocessing steps is ensured.

[0006] To achieve the above objectives, the technical solution adopted in this application is: Provided is a pile foundation ultrasonic detection pretreatment device, comprising: A positioning member, used for being coaxially arranged on the inner bottom surface of the foundation pile; A rotating platform is provided on the upper side of the positioning member and is suitable for rotating about the positioning member; a positioning member is provided on the lower side of the rotating platform, and the positioning member has the freedom to move horizontally and vertically relative to the rotating platform; a plug-in connector, disposed on the alignment member, adapted to move with the alignment member to a position coaxial with any one of the acoustic detection tubes; the plug-in connector adopts a tapered structure with an outer diameter gradually decreasing from top to bottom, so that when the plug-in connector is coaxially inserted into the acoustic detection tube, the outer wall of the plug-in connector contacts the inner top of the acoustic detection tube; and A lifting member is slidably provided on the connector in the up-down direction and is used to abut against the upper end surface of the acoustic detection tube; a docking member is slidably provided on the lower side of the lifting member and is used to abut against the outer wall of the acoustic detection tube; Among them, the rotating platform is provided with a first distance measuring element for measuring the movement distance of the positioning part in the horizontal direction, the connector is provided with a second distance measuring element for measuring the movement distance of the lifting part, the docking part has a third distance measuring element for measuring the distance between it and the bottom surface of the foundation pile, and the lifting part is provided with a fourth distance measuring element for measuring the movement distance of the docking part.

[0007] In a possible implementation, the alignment member includes: a translation plate, slidably disposed on the lower side of the rotating platform, adapted to move toward or away from the rotation axis of the rotating platform; and A vertical moving plate is slidably arranged on a side of the translational moving plate facing toward or away from the rotating shaft of the rotating platform in an up-down direction, and the connector is arranged on the vertical moving plate; The translation plate is provided with an elastic member connected to the vertical movement plate, and the elastic member is used to drive the vertical movement plate to move downward; the translation plate is provided with a blocking plate connected to the translation plate in a sliding manner along the up and down directions, and the blocking plate is transmission-connected to a linear drive component; The blocking plate is used to abut against the lower side of the vertical moving plate and transmit the driving force of the vertical moving plate to move upward; the blocking plate is also used to move to the lower side of the vertical moving plate so that the force of the elastic member can be transmitted to the connector through the vertical moving plate and prevent the connector from being separated from the acoustic detection tube; The first distance measuring element is a first infrared distance measuring sensor fixedly arranged on the lower side of the rotating platform and arranged toward the translation plate.

[0008] In a possible implementation, the connector has a reserved cavity extending horizontally therethrough; the lifting member is slidably disposed in the reserved cavity, and at least one end thereof extends out of the connector to abut against the upper end surface of the acoustic detection tube; Wherein, the second distance measuring element is a second infrared distance measuring sensor fixedly arranged on the lifting member and arranged toward the bottom surface of the reserved cavity.

[0009] In a possible implementation, the docking member includes: a sliding portion, slidably disposed on the lower side of the lifting member; and a rotating portion, rotatably disposed on the sliding portion and configured to abut against an outer wall of the acoustic detection tube; The third distance measuring element is a third infrared distance measuring sensor fixedly arranged on the rotating part and arranged toward the lower side, and the third infrared distance measuring sensor is coaxially arranged with the rotating part.

[0010] In a possible implementation, the docking member further includes: a linear cylinder, disposed on the lifting member, with its power output axis parallel to the moving direction of the docking member; and an elastic telescopic rod, one end of which is coaxially connected to the power output end of the linear cylinder and the other end of which is connected to the docking member; The linear cylinder can drive the docking piece to move to abut against the outer wall of the acoustic detection tube through the elastic telescopic rod, and cause the elastic telescopic rod to undergo elastic deformation to limit the separation of the docking piece from the outer wall of the acoustic detection tube; The fourth distance measuring element is a fourth infrared distance measuring sensor fixedly arranged on the lifting member and arranged toward the docking member.

[0011] In a possible implementation, the plug-in component has the freedom to rotate about its own central axis relative to the positioning component, and is transmission-connected to a rotation drive member for driving the plug-in component to rotate. When the outer wall of the connector is connected to the inner top of the acoustic detection tube, the lifting member is connected to the upper end surface of the acoustic detection tube, and the docking member is connected to the outer wall of the acoustic detection tube, the rotating driving component can drive the connector to rotate, and the connector, the lifting member and the docking member all maintain contact with the acoustic detection tube.

[0012] In a possible implementation, the positioning member includes: a centering sleeve, configured to be coaxially arranged on the inner bottom surface of the foundation pile; and A main shaft is coaxially inserted into the centering sleeve, and the rotating platform is rotatably connected to the main shaft; The centering sleeve is provided with a centering adjustment structure for connecting with the inner circumference of the foundation pile, and the main shaft is provided with a longitudinal position adjustment structure for connecting with the rotating platform.

[0013] In a possible implementation, the centering adjustment structure includes at least three self-adjusting telescopic rods arranged along the circumference of the centering sleeve, and the self-adjusting telescopic rods include: a fixing screw, disposed on the outer wall of the centering sleeve and extending radially outwardly of the centering sleeve; and An internal threaded sleeve, threadedly connected to the fixing screw, and an end portion thereof is used to abut against the inner circumference of the foundation pile; When the lengths of the self-adjusting telescopic rods are equal and the end of each of the internally threaded sleeves abuts against the inner circumferential surface of the foundation pile, the centering sleeve is coaxially arranged with the foundation pile.

[0014] In a possible implementation, the rotating platform has a mounting ring suitable for being sleeved on the main shaft, and the longitudinal position adjustment structure includes: A plurality of rotating sleeves are arranged on the main shaft at intervals along the vertical direction, each of the rotating sleeves is sleeved on the outer periphery of the main shaft, and a thread groove is formed on the outer periphery of each rotating sleeve; a through hole, formed on the mounting ring and adapted to communicate with any one of the threaded grooves; and The connecting bolt is adapted to be inserted into the through hole and communicated with the corresponding threaded groove to limit the movement of the mounting ring relative to the main shaft in the up and down directions.

[0015] In the embodiment of the present application, the positioning member can cooperate with the inner bottom surface of the foundation pile, so that it is coaxial with the foundation pile. Based on this, the rotating platform is rotated to the position directly above any one of the acoustic detection tubes, and then the positioning member is moved horizontally to make the connector and the acoustic detection tube coaxial or nearly coaxial. The connector is lowered by moving the positioning member in the up and down directions, so that the connector can be inserted into the acoustic detection tube. Due to the conical structure of the connector, the outer wall of the connector can contact and cooperate with the inner top of the acoustic detection tube, so that the connector and the acoustic detection tube are coaxial. The readings of the first and second distance measuring elements at this time are recorded. In this state, the lifting member abuts the upper end of the acoustic detection tube. Based on this, the docking member is moved to abut the outer wall of the acoustic detection tube, and the readings of the third and fourth distance measuring elements are recorded.

[0016] Since the first distance-measuring element is fixed to the rotating platform, the distance between the first distance-measuring element and the rotating platform's axis of rotation is fixed. Accordingly, when the positioning member and the foundation pile are coaxially arranged, the horizontal distance between the first distance-measuring element and the foundation pile's centerline is fixed. Furthermore, since the relative positions of the connector and the alignment member do not change, the horizontal distance between the connector's centerline and the alignment member is also fixed. On this basis, the horizontal distance between the alignment member and the first distance-measuring element is measured, and this distance is added to the horizontal distance between the first distance-measuring element and the foundation pile's centerline, and the horizontal distance between the connector and the alignment member to obtain the distance between the acoustic detection tube and the foundation pile's centerline. By rotating the rotating platform and repeating the above steps, the horizontal distance between each acoustic detection tube and the center axis of the pile can be determined. Since the angle between the acoustic detection tubes and the center axis of the pile is known (when there are three acoustic detection tubes, the angle is 120 degrees; when there are four acoustic detection tubes, the angle is 90 degrees), a coordinate system can be drawn from this information, and based on this coordinate system, the distance between any two acoustic detection tubes can be determined.

[0017] Since the angles of the triangle corresponding to the vertical section of the connector are known, and the initial height difference of the lifting member relative to the bottom of the connector is also known, after measuring the movement distance of the lifting member relative to the connector by the second distance measuring element, the inner diameter of the acoustic testing tube can be calculated using the Pythagorean theorem.

[0018] When the connector is inserted into the acoustic detection tube and abuts the top of the acoustic detection tube, since the docking piece is outside the acoustic detection tube, a set of values ​​can be obtained through the third distance measuring element. By summing these values ​​with the distance from the third distance measuring element to the bottom surface of the lifting element (that is, the plane where the lifting element and the upper end surface of the acoustic detection tube meet), the height of the acoustic detection tube from the ground can be obtained.

[0019] Since the fourth distance measuring element is arranged on the lifting member, the horizontal distance between the fourth distance measuring element and the central axis of the plug-in member is fixed; based on this, when the docking member moves relative to the lifting member to abut the outer wall of the acoustic detection tube, the outer diameter of the acoustic detection tube can be obtained by subtracting the reading of the fourth distance measuring element from the horizontal distance between the fourth distance measuring element and the central axis of the plug-in member.

[0020] The pile foundation ultrasonic detection preprocessing device provided in this embodiment has simple operation steps compared with the existing technology; in the data collection stage, the various components cooperate with each other, thereby reducing manpower input and ensuring the reliability of various measurement results in the preprocessing step.

[0021] The technical solution adopted in this application also provides a pre-processing method for ultrasonic detection of pile foundations, which is based on the pre-processing device for ultrasonic detection of pile foundations proposed in any of the above items, and includes the following steps: A. coaxially disposing the positioning member on the inner bottom surface of the pile; B. Controlling the rotation of the rotating platform and the horizontal and vertical movement of the positioning member to insert the connector into the acoustic detection tube, ensuring that the outer wall of the connector contacts the inner top of the acoustic detection tube and the lifting member contacts the top end of the acoustic detection tube; at this time, recording the readings of the first and second ranging elements; C. controlling the docking member to slide until it abuts against the outer wall of the acoustic detection tube and recording the reading of the third ranging element; E. Repeat steps B to D to complete the measurement of each of the acoustic testing tubes; F. Integrate the data and calculate the distance between each two acoustic detection tubes, the inner diameter and outer diameter of each acoustic detection tube, and the distance between the acoustic detection tube and the inner bottom surface of the foundation pile.

[0022] The beneficial effects of the pile foundation ultrasonic detection preprocessing method provided in this embodiment are the same as the beneficial effects of the aforementioned pile foundation ultrasonic detection preprocessing device, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is one of the schematic diagrams of the combined structure of foundation piles and acoustic detection tubes in the prior art; Figure 2 This is the second schematic diagram of the combined structure of the foundation pile and the acoustic detection tube in the prior art; Figure 3 A schematic diagram of the three-dimensional structure of a pile foundation ultrasonic detection pretreatment device provided in an embodiment of the present application; Figure 4 for Figure 3 A partial enlarged schematic diagram of the upper circle I; Figure 5 This is a schematic diagram of the three-dimensional structure of the rotating platform, positioning member, connector and lifting member used in the embodiment of the present application in the assembled state; Figure 6 A schematic diagram of the three-dimensional structure of the alignment member used in the embodiment of the present application; Figure 7 A schematic diagram of the exploded structure of the alignment member used in the embodiment of the present application; Figure 8 This is a schematic diagram of the three-dimensional structure of the translation plate and the blocking plate used in the embodiment of the present application in the assembled state; Figure 9 This is a schematic diagram of the three-dimensional structure of the connector and the lifting member used in the embodiment of the present application in the assembled state; Figure 10 This is a schematic diagram of the three-dimensional structure of the lifting member and the docking member in the assembled state used in the embodiment of the present application; Figure 11 This is a schematic cross-sectional structural diagram of the lifting member and the docking member used in the embodiment of the present application in an assembled state; Figure 12 A schematic diagram of the three-dimensional structure of the docking member and the third distance measuring element used in the embodiment of the present application under an exploded perspective; Figure 13 This is a schematic diagram of the three-dimensional structure of the centering sleeve and the self-adjusting telescopic rod in the assembled state used in the embodiment of the present application; Figure 14 This is a schematic cross-sectional view of the main shaft and rotating sleeve in an assembled state used in an embodiment of the present application; Figure 15 This is a schematic diagram of the exploded structure of the longitudinal position adjustment structure used in the embodiment of the present application; Figure 16 A coordinate system obtained based on four readings of the first distance measuring element according to an embodiment of the present application; Explanation of the accompanying drawings: 1. Positioning member; 11. Centering sleeve; 12. Main shaft; 2. Rotating platform; 21. Mounting ring; 3. Alignment member; 31. Translation plate; 311. Elastic member; 312. Blocking plate; 313. Linear drive member; 32. Vertical plate; 4. Connector; 41. Reserved cavity; 42. Rotational drive member; 5. Lifting member; 6. Docking member; 61. Sliding part; 62. Rotating part; 7. Linear cylinder; 71. Elastic telescopic rod; 8. Self-adjusting telescopic rod; 81. Fixing screw; 82. Internally threaded sleeve; 9. Longitudinal position adjustment structure; 91. Rotating sleeve; 911. Threaded groove; 92. Through hole; 93. Connecting bolt; 10. First distance measuring element; 20. Second distance measuring element; 30. Third distance measuring element; 40. Fourth distance measuring element; 100. Foundation pile; 200. Acoustic detection tube. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0026] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0029] like Figure 1 and Figure 2 As shown, there are four acoustic detection tubes 200 inside the foundation pile 100, and the angle between two adjacent acoustic detection tubes 200 along the circumference of the foundation pile 100 is ninety degrees; the ultrasonic detection preprocessing for the foundation pile 100 includes measuring the inner diameter, outer diameter and the distance from the inner bottom surface of the foundation pile 100 (hereinafter referred to as "height from the ground") of each acoustic detection tube 200, as well as measuring the four groups of values ​​AB, AC, AD, BC, BD, and CD.

[0030] The drawback of the existing technology is that workers must use calipers to measure the inner and outer diameters of the sonic detection tubes 200 four times, then use a ruler to measure the height of the sonic detection tubes 200 from the ground four times, and finally use a tape measure to measure the distance between each pair of sonic detection tubes 200 six times. The entire process requires changing three tools and performing fourteen operations. This manual operation is time-consuming and has a high error rate, making it unsuitable for current operations.

[0031] Please also refer to Figures 3 to 15 The ultrasonic detection pre-processing device for pile foundation provided by the present application is now described. The ultrasonic detection pre-processing device for pile foundation provided by the present application comprises a positioning member 1, a rotating platform 2, a connector 4 and a lifting member 5.

[0032] The positioning member 1 is used to be coaxially arranged on the inner bottom surface of the foundation pile 100, that is, the positioning member 1 has a central axis parallel to the up and down direction. By adjusting the horizontal position of the positioning member 1, the central axis can be made to coincide with the central axis of the foundation pile 100, completing the preliminary installation of the device.

[0033] The rotating platform 2 is arranged on the upper side of the positioning member 1. When the positioning member 1 is fixed to the inner side of the foundation pile 100, the lower side of the rotating platform 2 is above the upper end surface of each acoustic detection tube 200; and by manually driving the rotating platform 2 to rotate, the rotating platform 2 can be fixed on any one of the acoustic detection tubes 200.

[0034] It should be noted here that in the ultrasonic detection project of the foundation pile 100 adapted by this device, the angles between the two adjacent acoustic detection tubes 200 along the foundation pile 100 are the same; when the angles are different, this can be achieved by adding an angle monitoring element to the rotating platform 2 to ensure the effectiveness of data collection and calculation.

[0035] A positioning member 3 is provided on the lower side of the rotating platform 2, and the positioning member 3 has the freedom to move in the horizontal direction and the vertical direction relative to the rotating platform 2; in this embodiment, it is divided into two cases: one is that the positioning member 3 as a whole has the freedom to move in the horizontal direction and the vertical direction relative to the rotating platform 2, and the other is that a part of the positioning member 3 has the freedom to move in the horizontal direction and the vertical direction relative to the rotating platform 2.

[0036] The connector 4 is arranged on the alignment member 3. It can move horizontally with the alignment member 3 to a position coaxial with any one of the acoustic detection tubes 200, and can also move vertically with the alignment member 3 to be inserted into the acoustic detection tube 200; the connector 4 adopts a conical structure with an outer diameter gradually decreasing from top to bottom, so that when it is coaxially inserted into the acoustic detection tube 200, the outer wall of the connector 4 is connected to the inner top of the acoustic detection tube 200, and the connector 4 and the acoustic detection tube 200 are coaxially arranged.

[0037] The lifting member 5 is slidably arranged on the plug-in component 4 in the up-down direction and is used to abut the upper end surface of the acoustic detection tube 200; specifically, after the plug-in component 4 is inserted into the acoustic detection tube 200, the lifting member 5 will be in contact with the upper end surface of the acoustic detection tube 200; as the plug-in component 4 is gradually inserted, the outer peripheral wall of the plug-in component 4 is stuck on the inner top of the acoustic detection tube 200, that is, the plug-in component 4 cannot continue to move downward, and the position of the lifting member 5 is synchronously fixed.

[0038] A docking piece 6 is slidingly provided on the lower side of the lifting member 5, and the docking piece 6 is used to abut the outer wall of the acoustic detection tube 200; specifically, after the position of the lifting member 5 is synchronously fixed, the docking piece 6 is outside the acoustic detection tube 200, and by moving the docking piece 6 toward the central axis of the acoustic detection tube 200 (that is, the central axis of the connector 4), the docking piece 6 can be connected to the outer wall of the acoustic detection tube 200.

[0039] Among them, in order to realize the collection of data: (1) A first distance measuring element 10 is fixedly mounted on the rotating platform 2 and is used to measure the horizontal movement distance of the positioning member 3; (2) A second distance measuring element 20 is fixedly provided on the connector 4, and the second distance measuring element 20 is used to measure the moving distance of the lifting element 5 in the up and down direction; (3) A third distance measuring element 30 is fixedly provided on the docking member 6, and the third distance measuring element 30 is used to measure the distance between the docking member 6 and the inner bottom surface of the foundation pile 100; (IV) A fourth distance measuring element 40 is fixedly provided on the lifting member 5 , and the fourth distance measuring element 40 is used to measure the movement distance of the docking member 6 relative to the lifting member 5 .

[0040] In this embodiment of the present application, the positioning member 1 is capable of engaging with the inner bottom surface of the foundation pile 100, placing it coaxially with the foundation pile 100. Based on this, the rotating platform 2 is rotated to directly above any one of the acoustic detection tubes 200, and then the positioning member 3 is moved horizontally to position the connector 4 coaxially or nearly coaxially with the acoustic detection tube 200. The connector 4 is lowered by moving the positioning member 3 vertically, allowing it to be inserted into the acoustic detection tube 200. Due to its tapered structure, the outer wall of the connector 4 can contact and engage with the inner top of the acoustic detection tube 200, placing the connector 4 coaxially with the acoustic detection tube 200. The readings of the first and second distance measuring elements 10 and 20 are recorded. In this state, the lifting member 5 abuts the upper end of the acoustic detection tube 200. Based on this, the docking member 6 is moved to abut the outer wall of the acoustic detection tube 200, and the readings of the third and fourth distance measuring elements 30 and 40 are recorded.

[0041] Among them, since the first distance measuring element 10 is fixed on the rotating platform 2, the distance between the first distance measuring element 10 and the rotating axis of the rotating platform 2 is fixed; accordingly, when the positioning member 1 and the foundation pile 100 are coaxially arranged, the horizontal distance between the first distance measuring element 10 and the central axis of the foundation pile 100 is fixed. At the same time, since the relative positions of the connector 4 and the positioning member 3 do not change, the distance between the central axis of the connector 4 and the positioning member 3 in the horizontal direction is also fixed. On this basis, the horizontal movement distance of the positioning member 3 is measured by the first distance measuring element 10, and this distance is added together with the horizontal distance between the first distance measuring element 10 and the central axis of the foundation pile 100, and the horizontal distance between the connector 4 and the positioning member 3, to obtain the distance between the central axis of the acoustic detection tube 200 and the foundation pile 100. By rotating the rotating platform 2 and repeating the above steps, the horizontal distance between each acoustic detection tube 200 in the pile 100 and the central axis of the pile 100 can be obtained. Since the angle between the acoustic detection tube 200 and the central axis of the pile 100 is known (when there are three acoustic detection tubes 200, the angle is 120 degrees; when there are four acoustic detection tubes 200, the angle is 90 degrees), a coordinate system can be drawn based on the above information (such as Figure 16 As shown), based on this coordinate system, the distance between any two acoustic detection tubes 200 can be obtained.

[0042] Since the angles of the triangle corresponding to the vertical section of the connector 4 are known, and the initial height difference of the lifting member 5 relative to the bottom of the connector 4 is known, after measuring the movement distance of the lifting member 5 relative to the connector 4 by the second distance measuring element 20, the inner diameter of the acoustic testing tube 200 can be calculated by the Pythagorean theorem.

[0043] When the connector 4 is inserted into the acoustic detection tube 200 and abuts the inner top of the acoustic detection tube 200, since the docking member 6 is outside the acoustic detection tube 200, a set of values ​​can be obtained through the third distance measuring element 30. By summing these values ​​with the distance from the third distance measuring element 30 to the bottom surface of the lifting member 5 (i.e., the plane where the lifting member 5 connects with the upper end surface of the acoustic detection tube 200), the height of the acoustic detection tube 200 from the ground can be obtained.

[0044] Since the fourth distance measuring element 40 is arranged on the lifting member 5, the horizontal distance between the fourth distance measuring element 40 and the central axis of the plug-in member 4 is fixed; based on this, when the docking member 6 moves relative to the lifting member 5 to abut the outer wall of the acoustic detection tube 200, the outer diameter of the acoustic detection tube 200 can be obtained by subtracting the reading of the fourth distance measuring element 40 from the horizontal distance between the fourth distance measuring element 40 and the central axis of the plug-in member 4.

[0045] The pile foundation ultrasonic detection preprocessing device provided in this embodiment has simple operation steps compared with the existing technology; in the data collection stage, the various components cooperate with each other, thereby reducing manpower input and ensuring the reliability of various measurement results in the preprocessing step.

[0046] In some embodiments, the aforementioned positioning member 3 has the freedom to move in the horizontal direction and the vertical direction relative to the rotating platform 2, which means that the entire positioning member 3 has the freedom to move in the horizontal direction relative to the rotating platform 2, and a part of the positioning member 3 has the freedom to move in the vertical direction relative to the rotating platform 2; specifically, Figures 4 to 8 As shown, the alignment member 3 includes a translation plate 31 and a vertical movement plate 32 .

[0047] The translatory plate 31 is a vertical plate structure, with its surface facing the rotation axis of the rotating platform 2. The translatory plate 31 is slidably connected to the rotating platform 2, sliding toward and away from the rotation axis of the rotating platform 2. In this embodiment, the rotating platform 2 has a vertically extending slot. The translatory plate 31 is located on the underside of the rotating platform 2 and includes a connecting block suspended within the slot, thereby achieving a directional sliding connection between the rotating platform 2 and the translatory plate 31.

[0048] The vertical movable plate 32 is slidably arranged in the up-down direction on the side of the translational plate 31 facing toward or away from the rotation axis of the rotating platform 2; in this embodiment, the vertical movable plate 32 is arranged on the side of the translational plate 31 facing away from the rotation axis of the rotating platform 2, and the aforementioned connector 4 is fixedly arranged on the vertical movable plate 32 to be inserted into the acoustic detection tube 200 along with the vertical movement of the vertical movable plate 32.

[0049] It should be noted that, in this embodiment, Figure 5 As shown, a camera is provided on the vertical moving plate 32 to monitor the position of the connector 4 and the state of coordination with the environmental elements in real time.

[0050] In order to drive the vertical moving plate 32 to move downward, an elastic member 311 connected to the vertical moving plate 32 is provided on the translation plate 31, and the elastic member 311 is used to drive the vertical moving plate 32 to move downward; in this embodiment, the elastic member 311 is an external spring fixedly arranged on the upper side of the vertical moving plate 32, and the external spring is in an elastically compressed state, so that the vertical moving plate 32 is pressed downward during the process of the external spring recovering its deformation.

[0051] In order to adjust the position of the vertical moving plate 32, the translational moving plate 31 has a blocking plate 312 that is slidably connected to it in the up-down direction. The blocking plate 312 is located on the lower side of the vertical moving plate 32 and is transmission-connected to a linear drive member 313. Accordingly, the adjustment method for the vertical moving plate 32 includes: In the initial state, the blocking plate 312 is in a position abutting against the lower side of the vertical moving plate 32; When the vertical moving plate 32 needs to be moved upward, the linear driving member 313 drives the blocking plate 312 to move upward, thereby transmitting the upward driving force to the vertical moving plate 32 .

[0052] When the vertical moving plate 32 needs to be moved downward, the linear driving member 313 drives the blocking plate 312 downward, so that the vertical moving plate 32 moves downward under the dual influence of its own gravity and the force of the elastic member 311 restoring the deformation.

[0053] It should be noted that after the vertical plate 32 is moved downward until the connector 4 is inserted into the acoustic detection tube 200 in the aforementioned manner, the linear drive component 313 can be used to drive the blocking plate 312 to move downward until it is separated from the vertical plate 32. At this time, the elastic member 311 can provide downward and continuous pressure to the connector 4 to avoid the connector 4 from being separated from the acoustic detection tube 200 during the detection process.

[0054] It is necessary to add that, if Figures 6 to 8 As shown, a drive nut is fixed to the blocking plate 312, with its axial direction parallel to the vertical direction. Accordingly, the linear drive member 313 includes a drive screw threadedly connected to the drive nut and a first rotary motor drivingly connected to the drive screw. During use, the first rotary motor drives the drive screw to rotate, thereby driving the blocking plate 312 in the vertical direction.

[0055] The first ranging element 10 is a first infrared ranging sensor, which is fixedly arranged on the lower side of the rotating platform 2, and its detection end is arranged toward the translating plate 31, so that the distance between the translating plate 31 and the first infrared ranging sensor can be fed back in the form of a numerical value; based on this, since the horizontal distance between the first infrared ranging sensor and the rotating axis of the rotating platform 2, and the horizontal distance between the detection surface of the translating plate 31 and the central axis of the connector 4 are both fixed, the horizontal distance between the central axis of the acoustic detection tube 200 and the central axis of the foundation pile 100 can be calculated by combining the readings of the first infrared ranging sensor.

[0056] In some embodiments, as Figures 9 to 11 As shown, the connector 4 has a reserved cavity 41 that runs through in the horizontal direction, and the reserved cavity 41 extends along the axial direction of the connector 4; when the connector 4 is inserted into the acoustic detection tube 200 until the outer peripheral surface of the connector 4 abuts the inner top of the acoustic detection tube 200, the extension direction of the reserved cavity 41 is set parallel to the axial direction of the acoustic detection tube 200.

[0057] The lifting member 5 is slidably arranged in the reserved cavity 41 along the extension direction of the reserved cavity 41. The lifting member 5 adopts a strip structure extending along the through-going direction of the reserved cavity 41, and at least one end of the lifting member 5 extends to the outside of the connector 4, so that when the connector 4 is inserted into the acoustic detection tube 200, the lower side surface of the lifting member 5 can synchronously abut the upper end surface of the acoustic detection tube 200.

[0058] The second ranging element 20 is a second infrared ranging sensor, which is fixedly mounted on the lifting member 5, and its detection end is arranged toward the inner bottom surface of the reserved cavity 41, so that the vertical distance between the lifting member 5 and the inner bottom surface of the reserved cavity 41 can be fed back in the form of a numerical value; based on this, since the distance between the inner bottom surface of the reserved cavity 41 and the lower end of the connector 4, and the inclination angle of the outer wall of the connector 4 are all known, the inner diameter of the acoustic detection tube 200 can be calculated by combining the readings of the second infrared ranging sensor.

[0059] In some embodiments, as Figure 11 and Figure 12 As shown, the docking member 6 includes a sliding portion 61 and a rotating portion 62 .

[0060] The sliding portion 61 is slidably provided on the lower side of the lifting member 5 along the longitudinal direction of the lifting member 5 .

[0061] The rotating portion 62 is rotatably disposed on the sliding portion 61 for contacting the outer wall of the acoustic detection tube 200 . In this embodiment, the sliding portion 61 is cylindrical and extends in the vertical direction, and the rotating portion 62 is cylindrical and sleeved on the outer periphery of the sliding portion 61 .

[0062] The third distance measuring element 30 is a third infrared distance measuring sensor, which is fixedly arranged on the rotating part 62, and its detection end is arranged to face downward, so that the distance between the rotating part 62 and the inner bottom surface of the foundation pile 100 can be fed back in the form of a numerical value; based on this, since the distance between the rotating part 62 and the bottom surface of the lifting member 5 is fixed, the height of the acoustic detection tube 200 from the ground can be obtained by adding the reading of the third infrared distance measuring sensor and the distance between the rotating part 62 and the bottom surface of the lifting member 5.

[0063] The third infrared ranging sensor is coaxially arranged with the rotating part 62. By adopting the above technical solution, when the docking member 6 abuts against the outer wall of the acoustic detection tube 200, that is, when the rotating part 62 abuts against the outer wall of the acoustic detection tube 200, the rotating part 62 can be rotated relative to the sliding part 61 by driving the connector 4 to rotate about its own central axis. At this time, if the reading of the third infrared ranging sensor remains unchanged, it means that there are no impurities on the upper end surface of the acoustic detection tube 200. Correspondingly, if the reading of the third infrared ranging sensor changes, it means that there are impurities on the upper end surface of the acoustic detection tube 200. By integrating the data and observing with the aforementioned camera, accurate values ​​can be obtained.

[0064] In some embodiments, as Figure 10 and Figure 11 As shown, the lifting member 5 has a guide hole that penetrates in the up-down direction and extends along its length direction, and the docking member 6 has a hanging portion that extends upward to pass through the guide hole and expands outward in the horizontal direction.

[0065] Based on the above content, the docking member 6 further includes a linear cylinder 7 and an elastic telescopic rod 71 .

[0066] The linear cylinder 7 is arranged on the lifting member 5, and its power output axis is parallel to the moving direction of the docking member 6, and the power output end of the linear cylinder 7 is arranged toward the side where the docking member 6 is located, that is, toward the aforementioned suspension part.

[0067] One end of the elastic telescopic rod 71 is coaxially connected to the power output end of the linear cylinder 7, and the other end is connected to the docking member 6. In actual use, the elastic telescopic rod 71 has the function of extending or shortening along its own length direction; specifically, Figure 11 As shown, the elastic telescopic rod 71 includes an outer sleeve connected to the power output end of the linear cylinder 7, and an inner shaft slidably inserted in the outer sleeve; the inner shaft is connected to the docking piece 6, and the outer sleeve has an inner spring sleeved on the outer circumference of the inner shaft, and the two ends of the inner spring are respectively connected to the insertion end of the inner shaft and the open end of the outer sleeve (that is, the end of the outer sleeve away from the linear cylinder 7).

[0068] In actual use, the linear cylinder 7 can drive the docking piece 6 to move to abut the outer wall of the acoustic detection tube 200 through the elastic telescopic rod 71; at this time, the linear cylinder 7 remains in the started state, which can cause the elastic telescopic rod 71 to undergo elastic deformation (specifically in this embodiment, the elastic deformation is elastic stretching); at this time, the elastic telescopic rod 71 provides an elastic force toward the acoustic detection tube 200 to the docking piece 6, so as to limit the separation of the docking piece 6 from the outer wall of the acoustic detection tube 200, especially in the scenario where the docking piece 6 moves circumferentially around the acoustic detection tube 200.

[0069] The fourth distance measuring element 40 is a fourth infrared distance measuring sensor, which is fixedly mounted on the lifting member 5, with its detection end facing the docking member 6. Specifically, the fourth infrared distance measuring sensor is fixed to the upper side of the lifting member 5, with its detection end facing the hanging portion of the docking member 6, thereby being able to provide feedback of the horizontal distance between the fourth infrared distance measuring sensor and the central axis of the docking member 6 in the form of a numerical value. Based on this, since the outer diameter of the docking member 6 and the horizontal distance between the fourth infrared distance measuring sensor and the central axis of the connector 4 are fixed, the outer diameter of the acoustic detection tube 200 can be obtained by combining the reading of the fourth infrared distance measuring sensor (i.e., the horizontal distance between the fourth infrared distance measuring sensor and the central axis of the connector 4 minus this reading) and subtracting half of the outer diameter of the docking member 6.

[0070] In some embodiments, as Figure 4 and Figure 5 As shown, the connector 4 has the freedom to rotate about its own central axis relative to the positioning member 3, and is transmission-connected to a rotation drive member 42 for driving its rotation; in this embodiment, the rotation drive member 42 is a second rotating motor fixedly arranged on the positioning member 3.

[0071] When the outer wall of the connector 4 is in contact with the inner top of the acoustic detection tube 200, the lifting member 5 is in contact with the upper end surface of the acoustic detection tube 200, and the docking member 6 is in contact with the outer wall of the acoustic detection tube 200, the connector 4 can be driven to rotate by rotating the driving member 42, and the connector 4, the lifting member 5 and the docking member 6 all maintain contact with the acoustic detection tube 200.

[0072] During this process, by observing the readings of the second distance measuring element 20, the third distance measuring element 30 and the fourth distance measuring element 40, it is possible to determine whether there are impurities on the outer circumference, upper end surface and inner top of the acoustic detection tube 200; and based on the judgment situation, appropriate readings are selected as data to be recorded.

[0073] For example, during one rotation, the value of the fourth distance measuring element 40 is X most of the time, and is Y only once, and Y is greater than X. In this case, the operator can determine that there are impurities on the outer wall of the acoustic detection tube 200 at the measured point Y, and take the specific value as X.

[0074] In some embodiments, as Figures 13 to 15 As shown, the positioning element 1 includes a centering sleeve 11 and a main shaft 12 .

[0075] The centering sleeve 11 is coaxially disposed on the inner bottom surface of the foundation pile 100 and has a cylindrical cavity extending vertically therethrough; the central axis of the cylindrical cavity is collinear with the central axis of the foundation pile 100 .

[0076] The main shaft 12 is coaxially inserted into the centering sleeve 11 , and the aforementioned rotating platform 2 is rotatably connected to the main shaft 12 .

[0077] The centering sleeve 11 has a centering adjustment structure for connecting with the inner circumference of the foundation pile 100. The centering sleeve 11 can be quickly fixed at the center position of the foundation pit 100 through the centering adjustment structure; the main shaft 12 has a longitudinal position adjustment structure 9 connected with the rotating platform 2. Through this longitudinal position adjustment structure 9, the height of the rotating platform 2 can be adjusted to ensure the feasibility of the above-mentioned operating steps.

[0078] In some embodiments, as Figure 3 and Figure 13 As shown, the centering adjustment structure includes at least three self-adjusting telescopic rods 8 arranged along the circumference of the centering sleeve 11; in this embodiment, there are four self-adjusting telescopic rods 8, and the self-adjusting telescopic rods 8 include a fixed screw 81 and an internal threaded sleeve 82.

[0079] The fixing screw 81 is disposed on the outer wall of the centering sleeve 11 and extends radially outward of the centering sleeve 11 .

[0080] The internal threaded sleeve 82 is coaxially arranged with the fixed screw 81 and has an internal thread structure inside, so that the internal threaded sleeve 82 is threadedly connected to the fixed screw 81.

[0081] In actual use, by rotating the internally threaded sleeve 82, the outer end of the internally threaded sleeve 82 can be brought into contact with the inner circumference of the foundation pile 100. Accordingly, when the lengths of the self-adjusting telescopic rods 8 are equal and the ends of the internally threaded sleeves 82 abut against the inner circumference of the foundation pile 100, the centering sleeve 11 is coaxially arranged with the foundation pile 100.

[0082] In some embodiments, as Figure 14 and Figure 15 As shown, the rotating platform 2 has a mounting ring 21 suitable for being sleeved on the main shaft 12. By sleeved on the mounting ring 21 on the main shaft 12, the rotational connection relationship between the rotating platform 2 and the main shaft 12 can be completed, and its rotation axis can be the main shaft 12.

[0083] The longitudinal position adjustment structure 9 includes a plurality of rotating sleeves 91 , through holes 92 and connecting bolts 93 .

[0084] Multiple rotating sleeves 91 are vertically spaced apart on the main shaft 12. Each rotating sleeve 91 is sleeved onto the outer circumference of the main shaft 12, and each rotating sleeve 91 has a threaded groove 911 formed on its outer circumference. Specifically, the main shaft 12 has multiple mounting grooves spaced apart vertically. Each mounting groove is annular in structure, and the multiple rotating sleeves 91 are inserted into the multiple mounting grooves in a one-to-one correspondence.

[0085] The through hole 92 is formed on the mounting ring 21 , and as the mounting ring 21 moves in the up and down directions, the through hole 92 is adapted to communicate with any one of the thread grooves 911 .

[0086] The connecting bolt 93 is adapted to be inserted into the through hole 92 and communicate with the corresponding threaded groove 911 to limit the movement of the mounting ring 21 in the up and down directions relative to the main shaft 12 , thereby achieving locking of the height of the rotating platform 2 .

[0087] Based on the same inventive concept, an embodiment of the present application further provides a method for preprocessing ultrasonic detection of pile foundations, and a device for preprocessing ultrasonic detection of pile foundations based on any of the aforementioned contents, comprising the following steps: A. Coaxially arrange the positioning member 1 on the inner bottom surface of the foundation pile 100; B. Control the rotation of the rotating platform 2 and the horizontal and vertical movement of the positioning member 3 to insert the connector 4 into the acoustic detection tube 200, ensuring that the outer wall of the connector 4 contacts the inner top of the acoustic detection tube 200 and the lifting member 5 contacts the top end of the acoustic detection tube 200. At this point, record the readings of the first and second ranging elements 10 and 20. C. Controlling the docking member 6 to slide to abut against the outer wall of the acoustic detection tube 200 and recording the reading of the third distance measuring element 30; E. Repeat steps B to D to complete the measurement of each acoustic testing tube 200; F. Integrate the data and calculate the distance between each two acoustic detection tubes 200, the inner diameter and outer diameter of each acoustic detection tube 200, and the distance between the acoustic detection tube 200 and the inner bottom surface of the foundation pile 100.

[0088] The beneficial effects of the pile foundation ultrasonic detection preprocessing method provided in this embodiment are the same as the beneficial effects of the aforementioned pile foundation ultrasonic detection preprocessing device, and will not be repeated here.

[0089] The above content is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. Pile ultrasonic detection pretreatment device, characterized in that: include: A positioning member, used for being coaxially arranged on the inner bottom surface of the foundation pile; A rotating platform is provided on the upper side of the positioning member and is suitable for rotating about the positioning member; a positioning member is provided on the lower side of the rotating platform, and the positioning member has the freedom to move horizontally and vertically relative to the rotating platform; The plug-in connector is provided on the positioning member and is adapted to move with the positioning member to a position coaxial with any one of the acoustic detection tubes; the plug-in connector adopts a tapered structure with an outer diameter gradually decreasing from top to bottom, so that when the plug-in connector is coaxially inserted into the acoustic detection tube, the outer wall of the plug-in connector contacts the inner top of the acoustic detection tube; as well as A lifting member is slidably provided on the connector in the up-down direction and is used to abut against the upper end surface of the acoustic detection tube; a docking member is slidably provided on the lower side of the lifting member and is used to abut against the outer wall of the acoustic detection tube; Among them, the rotating platform is provided with a first distance measuring element for measuring the movement distance of the positioning part in the horizontal direction, the connector is provided with a second distance measuring element for measuring the movement distance of the lifting part, the docking part has a third distance measuring element for measuring the distance between it and the bottom surface of the foundation pile, and the lifting part is provided with a fourth distance measuring element for measuring the movement distance of the docking part.

2. The ultrasonic detection pretreatment device for pile foundation according to claim 1, characterized in that: The alignment member includes: a translation plate, slidably disposed on the lower side of the rotating platform, adapted to move toward or away from the rotation axis of the rotating platform; and A vertical moving plate is slidably arranged on a side of the translational moving plate facing toward or away from the rotating shaft of the rotating platform in an up-down direction, and the connector is arranged on the vertical moving plate; The translation plate is provided with an elastic member connected to the vertical movement plate, and the elastic member is used to drive the vertical movement plate to move downward; the translation plate is provided with a blocking plate connected to the translation plate in a sliding manner along the up and down directions, and the blocking plate is transmission-connected to a linear drive component; The blocking plate is used to abut against the lower side of the vertical moving plate and transmit the driving force of the vertical moving plate to move upward; the blocking plate is also used to move to the lower side of the vertical moving plate so that the force of the elastic member can be transmitted to the connector through the vertical moving plate and prevent the connector from being separated from the acoustic detection tube; The first distance measuring element is a first infrared distance measuring sensor fixedly arranged on the lower side of the rotating platform and arranged toward the translation plate.

3. The ultrasonic detection pretreatment device for pile foundation according to claim 1, characterized in that: The connector has a reserved cavity extending horizontally therethrough; the lifting member is slidably disposed in the reserved cavity, and at least one end thereof extends out of the connector to abut against the upper end surface of the acoustic detection tube; Wherein, the second distance measuring element is a second infrared distance measuring sensor fixedly arranged on the lifting member and arranged toward the bottom surface of the reserved cavity.

4. The pile foundation ultrasonic detection pretreatment device according to claim 1, characterized in that: The docking piece includes: a sliding portion, slidably disposed on the lower side of the lifting member; and a rotating portion, rotatably disposed on the sliding portion and configured to abut against an outer wall of the acoustic detection tube; The third distance measuring element is a third infrared distance measuring sensor fixedly arranged on the rotating part and arranged toward the lower side, and the third infrared distance measuring sensor is coaxially arranged with the rotating part.

5. The pile foundation ultrasonic detection preprocessing device according to claim 1, characterized in that: The docking piece also includes: a linear cylinder, disposed on the lifting member, with its power output axis parallel to the moving direction of the docking member; and an elastic telescopic rod, one end of which is coaxially connected to the power output end of the linear cylinder and the other end of which is connected to the docking member; The linear cylinder can drive the docking piece to move to abut against the outer wall of the acoustic detection tube through the elastic telescopic rod, and cause the elastic telescopic rod to undergo elastic deformation to limit the separation of the docking piece from the outer wall of the acoustic detection tube; The fourth distance measuring element is a fourth infrared distance measuring sensor fixedly arranged on the lifting member and arranged toward the docking member.

6. The ultrasonic detection pretreatment device for pile foundation according to any one of claims 1 to 5, characterized in that: The plug-in component has the freedom to rotate relative to the positioning component about its own central axis, and is transmission-connected to a rotation driving member for driving the plug-in component to rotate. When the outer wall of the connector is connected to the inner top of the acoustic detection tube, the lifting member is connected to the upper end surface of the acoustic detection tube, and the docking member is connected to the outer wall of the acoustic detection tube, the rotating driving component can drive the connector to rotate, and the connector, the lifting member and the docking member all maintain contact with the acoustic detection tube.

7. The pile foundation ultrasonic detection pre-processing device according to claim 1, characterized in that: The positioning member includes: a centering sleeve, configured to be coaxially arranged on the inner bottom surface of the foundation pile; and A main shaft is coaxially inserted into the centering sleeve, and the rotating platform is rotatably connected to the main shaft; The centering sleeve is provided with a centering adjustment structure for connecting with the inner circumference of the foundation pile, and the main shaft is provided with a longitudinal position adjustment structure connected with the rotating platform.

8. The pile foundation ultrasonic detection pre-processing device according to claim 7, characterized in that: The centering adjustment structure includes at least three self-adjusting telescopic rods arranged along the circumference of the centering sleeve, and the self-adjusting telescopic rods include: a fixing screw, disposed on the outer wall of the centering sleeve and extending radially outwardly of the centering sleeve; and An internal threaded sleeve, threadedly connected to the fixing screw, and an end portion thereof is used to abut against the inner circumference of the foundation pile; When the lengths of the self-adjusting telescopic rods are equal and the end of each of the internally threaded sleeves abuts against the inner circumferential surface of the foundation pile, the centering sleeve is coaxially arranged with the foundation pile.

9. The pile foundation ultrasonic detection pre-processing device according to claim 7, characterized in that: The rotating platform has a mounting ring suitable for being sleeved on the main shaft, and the longitudinal position adjustment structure includes: A plurality of rotating sleeves are arranged on the main shaft at intervals along the vertical direction, each of the rotating sleeves is sleeved on the outer periphery of the main shaft, and a thread groove is formed on the outer periphery of each rotating sleeve; a through hole, formed on the mounting ring and adapted to communicate with any one of the threaded grooves; and The connecting bolt is adapted to be inserted into the through hole and communicated with the corresponding threaded groove to limit the movement of the mounting ring relative to the main shaft in the up and down directions.

10. A method for preprocessing ultrasonic detection of pile foundations, based on the device for preprocessing ultrasonic detection of pile foundations according to any one of claims 1 to 9, characterized in that: The following steps are involved: A. coaxially setting the positioning member on the inner bottom surface of the foundation pile; B. Controlling the rotation of the rotating platform and the horizontal and vertical movement of the positioning member to insert the connector into the acoustic detection tube, ensuring that the outer wall of the connector contacts the inner top of the acoustic detection tube and the lifting member contacts the top end of the acoustic detection tube; at this time, recording the readings of the first and second ranging elements; C. controlling the docking member to slide until it abuts against the outer wall of the acoustic detection tube and recording the reading of the third ranging element; E. Repeat steps B to D to complete the measurement of each acoustic testing tube; F. Integrate the data and calculate the distance between each two acoustic detection tubes, the inner diameter and outer diameter of each acoustic detection tube, and the distance between the acoustic detection tube and the inner bottom surface of the foundation pile.

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