Device for detecting aperture and perpendicularity of cast-in-place pile

Abstract

The invention relates to the technical field of detection equipment, and discloses a cast-in-place pile aperture and perpendicularity detection device which comprises a main body, the main body is provided with an annular ultrasonic sensor array, an attitude sensor, a depth sensor, a hydraulic jet device and a sealing structure, and the hydraulic jet device comprises a pump and an annular nozzle array fixed to the peripheral wall of the main body. The pump is communicated with the annular nozzle array through a water outlet pipe, is communicated with a clear water source through a water inlet pipe, and sprays clear water to the periphery through the annular nozzle array to form a local clear water environment; the sealing structure comprises an upper sealing ring and a lower sealing ring which are fixed to the peripheral wall of the upper portion and the peripheral wall of the lower portion of the body respectively, and the upper sealing ring and the lower sealing ring are made of flexible materials and can expand in the radial direction. According to the cast-in-place pile hole diameter and perpendicularity detection device, a hydraulic barrier ultrasonic measurement system is established, and the technical problem that the ultrasonic measurement precision is reduced in a high-sand-content mud environment is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of detection devices, in particular to a bored pile hole diameter and verticality detection device. BACKGROUND

[0002] The application relates to the technical field of geological exploration detection, in particular to a bored pile hole diameter and verticality detection device.

[0003] The existing SHAPE (Sonic Hole Analysis and Profiling Equipment) uses an ultrasonic sensor to synchronously scan the hole wall surface for omnidirectional detection, and the distance from the sensor to the hole wall is calculated by measuring the propagation time of ultrasonic waves in water or mud. SUMMARY

[0004] The application provides a bored pile hole diameter and verticality detection device, which can create a local clean water environment in a high-sand-content mud environment, improve the accuracy and reliability of ultrasonic measurement, and solve the technical problems in the related art.

[0005] The application provides a bored pile hole diameter and verticality detection device, which comprises a main body, an annular ultrasonic sensor array, an attitude sensor and a depth sensor are arranged on the main body, and further comprises: A hydraulic jetting device comprises a pump and an annular nozzle array fixed on the outer peripheral wall of the main body, the pump is communicated with the annular nozzle array through a water outlet pipe, the pump is communicated with a clean water source through a water inlet pipe, and clean water is sprayed to the surrounding through the annular nozzle array to form a local clean water environment; The sealing structure comprises an upper sealing ring and a lower sealing ring fixed on the outer peripheral walls of the upper part and the lower part of the main body, respectively, the upper sealing ring and the lower sealing ring are made of flexible materials and can expand radially, and are used for forming a seal with the hole wall to form a local closed space around the annular ultrasonic sensor array; The sealing structure further comprises a drainage channel communicating the inside and the outside of the local closed space.

[0006] Further, the annular ultrasonic sensor array is fixed on the outer peripheral wall of the main body and comprises a plurality of ultrasonic sensors arranged at equal intervals along the circumference of the main body, which are used for emitting ultrasonic waves and receiving echoes reflected from the hole wall to measure the distance from the sensor to the hole wall.

[0007] Further, the sealing structure further comprises an expansion control mechanism fixed inside the main body and communicating with the upper sealing ring and the lower sealing ring through hydraulic pipelines for controlling expansion and contraction of the upper sealing ring and the lower sealing ring.

[0008] Further, the expansion control mechanism comprises a hydraulic pump, a pressure control valve and a pressure sensor, the hydraulic pump delivers pressure liquid to the upper sealing ring and the lower sealing ring through hydraulic pipelines, the pressure control valve is used for controlling the liquid pressure entering each sealing ring, and the pressure sensor is used for monitoring the pressure state of each sealing ring.

[0009] Further, the annular ultrasonic sensor array comprises a plurality of ultrasonic sensors fixed on the main body through a support, the support is in an L-shaped structure, one end of the support is fixedly connected with the outer peripheral wall of the main body, and the other end of the support is provided with a sensor mounting seat.

[0010] Further, the outer periphery of the upper sealing ring and / or the lower sealing ring is provided with a recess, and the recess can form a drainage channel in cooperation with the hole wall when the local sealing space is formed.

[0011] Further, a data processing unit is further included, the data processing unit is connected with the attitude sensor, the depth sensor and the annular ultrasonic sensor array respectively, and is used for processing the collected data.

[0012] Further, the upper sealing ring and the lower sealing ring are both composed of a plurality of annularly arrayed sealing segments, each sealing segment is independently connected with the hydraulic pump through the pressure control valve, each sealing segment is provided with a contact pressure sensor for monitoring the contact pressure between the sealing segment and the hole wall in real time, and each sealing segment adjusts the stretching degree of the sealing segment according to the contact pressure monitored by the contact pressure sensor in real time.

[0013] Further, a telescopic central positioning device is further included, the telescopic central positioning device comprises a central shaft and a plurality of elastic supporting rods, the central shaft is fixed inside the main body, one end of the elastic supporting rod is hingedly connected with the central shaft, and the other end of the elastic supporting rod is provided with a contact block in contact with the hole wall.

[0014] The application discloses a method for detecting the diameter and verticality of a cast-in-place pile hole. The detection device comprises a main body, an annular ultrasonic sensor array, a hydraulic jetting device, a sealing structure and a measurement reference system. The sealing structure is started to make the upper sealing ring and the lower sealing ring radially expand and contact the hole wall to form a local closed space. Start the hydraulic jet device, and spray clean water into the enclosed space through the annular nozzle array to flush the high-sand mud and form a local clean water environment; Start the annular ultrasonic sensor array, emit ultrasonic signals and receive echoes reflected from the hole wall; Calculate the distance from the sensor to the hole wall according to the ultrasonic propagation time, and determine the hole diameter and perpendicularity information of the current position in combination with the data of the measurement reference system.

[0015] The beneficial effects of the present application are: The pile hole diameter and perpendicularity detection device provided by the present application solves the problem of reduced ultrasonic measurement accuracy in a high-sand mud environment by creating a hydraulic barrier ultrasonic measurement system; the pile hole diameter and perpendicularity detection device provided by the present application effectively solves the problem of ultrasonic measurement accuracy in a high-sand mud environment by creating a temporary clean water measurement environment through a hydraulic barrier, and provides a reliable pile quality detection method. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is an elevation view of the pile hole diameter and perpendicularity detection device of the present application; Figure 2 is a partial structure schematic view of the pile hole diameter and perpendicularity detection device of the present application; Figure 3 is a schematic view of the internal removal of the pipe valve of the pile hole diameter and perpendicularity detection device of the present application Figure 1 ; Figure 4 is a schematic view of the internal removal of the pipe valve of the pile hole diameter and perpendicularity detection device of the present application Figure 1 ; Figure 5 is a top view of the sealing ring of the embodiment 2 of the present application; Figure 6 is an elevation view of the sealing ring of the embodiment 2 of the present application. DETAILED DESCRIPTION

[0017] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed in function and arrangement without departing from the scope of the present description. Various processes or components can be omitted, substituted, or added according to desired implementations. Additionally, features described in some examples can be combined in other examples.

[0018] Before the present application is described in detail, the following terminology will first be explained in order to help understand the technical solutions of the present application: Cast-in-place pile: refers to a type of pile foundation formed by drilling a hole in the ground, placing a steel reinforcement cage inside the hole, and then pouring concrete into the hole.

[0019] Hydraulic barrier: refers to a local isolated area formed by water flow, used to block or reduce the interference of certain substances.

[0020] Sealing structure: refers to a structural unit used to form a local closed space inside the borehole, which can contact the borehole wall and form a sealing effect.

[0021] Layered hydraulic jet and drainage system: refers to a system structure in which the hydraulic jet device and the drainage unit are arranged in layers in the vertical direction.

[0022] Dual-pressure source separation control system: refers to a device structure with two independent pressure control systems.

[0023] Fast-flow type cleaning system: refers to a system that uses water flow dynamics to remove silt particles instead of a filter network.

[0024] At least one embodiment of the present invention discloses a cast-in-place pile hole diameter and verticality detection device, as shown in Figure 1 , comprising: The cast-in-place pile hole diameter and verticality detection device provided by the embodiment includes a main body 100, a ring-shaped ultrasonic sensor array 200, a hydraulic jet device 300, a sealing structure 400, and a measurement reference system.

[0025] The main body 100 is in a columnar structure made of metal material with sufficient strength and rigidity for accommodating and fixing other components and providing the basic framework of the device. The central axis of the main body 100 is arranged approximately parallel to the central axis of the cast-in-place pile hole. The outer diameter of the main body 100 is smaller than the diameter of the cast-in-place pile hole to ensure that the device can smoothly descend to the measurement position.

[0026] The ring-shaped ultrasonic sensor array 200 is fixed on the outer peripheral wall of the main body 100, including 8 ultrasonic sensors 201 arranged equidistantly along the circumference of the main body 100, forming a complete ring-shaped array. Each ultrasonic sensor 201 is fixed on the main body 100 by a bracket. The signal line of the ultrasonic sensor 201 is connected to the signal processing circuit inside the main body, which transmits the signal to the measurement reference system through the data bus after preliminary processing. The ultrasonic sensor 201 can emit ultrasonic waves and receive the echoes reflected from the borehole wall, which is used to measure the distance from the sensor to the borehole wall.

[0027] The hydraulic jetting device 300 comprises a high-pressure pump 301 and an annular nozzle array 302 arranged inside the main body 100. The high-pressure pump 301 is fixed at a middle upper position inside the main body 100 and is in communication with the annular nozzle array 302 through a water outlet pipe. The annular nozzle array 302 is fixed on the outer circumferential wall of the main body 100 at the same axial height position of the annular ultrasonic sensor array 200, in the middle region between the upper sealing ring 401 and the lower sealing ring 402, and the nozzle openings are directed to the radial outside. The annular nozzle array 302 comprises a plurality of nozzles 312, which are uniformly distributed along the circumference of the main body 100, and each nozzle 312 is arranged at a gap position between two adjacent ultrasonic sensors 201 to avoid interference with the sensor support. The high-pressure pump 301 is connected to a clean water storage cabin through a water inlet pipe, and the clean water storage cabin is arranged at the wellhead. The hydraulic jetting device 300 can spray clean water to the surrounding through the annular nozzle array 302 to wash away the high-sand mud in the local space and form a local clean water environment.

[0028] The sealing structure 400 includes an upper sealing ring 401 and a lower sealing ring 402 fixed on the upper and lower outer peripheral walls of the main body 100, respectively. The upper sealing ring 401 and the lower sealing ring 402 are made of flexible rubber material and have good elasticity and sealing performance. The upper sealing ring 401 and the lower sealing ring 402 are fixed on the main body 100 through metal fixing rings, and the metal fixing rings are connected to the outer peripheral wall of the main body 100 through bolts. The cross section of the upper sealing ring 401 and the lower sealing ring 402 is a concave U-shaped structure with the opening facing the hole wall direction, forming a sealing cavity 403. The sealing cavity 403 is in communication with the expansion control mechanism through a hydraulic pipeline. When the pressure liquid is injected into the sealing cavity 403, the sealing ring expands outward under the action of the hydraulic pressure and contacts the hole wall to form a seal. The upper sealing ring 401 and the lower sealing ring 402 can radially expand in the working state to contact the hole wall to form a seal, thereby forming a local closed space around the annular ultrasonic sensor array 200. The sealing structure 400 further includes an expansion control mechanism which can be provided at the wellhead and is in communication with the upper sealing ring 401 and the lower sealing ring 402 through hydraulic pipelines for controlling the expansion and contraction of the sealing rings. The expansion control mechanism includes a hydraulic pump, a pressure control valve and a pressure sensor. The hydraulic pump delivers pressure liquid into the sealing cavity 403 of the sealing ring through the hydraulic pipeline. The hydraulic pipeline is divided into an upper branch and a lower branch through a hydraulic flow divider. The upper branch is connected to the upper sealing ring 401, and the lower branch is connected to the lower sealing ring 402. The hydraulic flow divider is fixed inside the main body 100 and can independently control the pressure of the two sealing rings. The pressure control valve is provided on the upper branch and the lower branch respectively for independently controlling the liquid pressure entering each sealing ring. The expansion control mechanism further includes a backflow valve 412 and a hydraulic oil tank 413. The backflow valve 412 is provided on the upper branch and the lower branch respectively and is connected in parallel with the corresponding pressure control valve for controlling the backflow of the liquid when the sealing ring contracts. The hydraulic oil tank 413 is in communication with each backflow valve 412 through a backflow pipeline for storing the backflow pressure liquid. When the sealing ring needs to be contracted, the corresponding backflow valve 412 is opened, and the pressure liquid in the sealing cavity 403 flows back to the hydraulic oil tank 413 through the backflow pipeline to realize the contraction of the sealing ring. The pressure sensor is provided on the upper branch and the lower branch respectively for monitoring the pressure state of each sealing ring. The signal is connected to the measurement reference system through a wire for realizing real-time monitoring and adjustment of the pressure.

[0029] The outer periphery of the upper sealing ring 401 and / or the lower sealing ring 402 is provided with a recess. The recess can cooperate with the hole wall to form a drainage channel when the local sealed space is formed. The high-pressure pump 301 pumps clean water into the local sealed space, and the drainage channel is used for drainage to complete the replacement of the water body in the local sealed space.

[0030] The measurement reference system is fixed inside the main body 100, including a posture sensor and a depth sensor. The posture sensor is fixed at the center position inside the main body 100 and connected with the inner wall of the main body 100 through a support. The posture sensor includes a three-axis accelerometer and a three-axis gyroscope for measuring the inclination and azimuth angle of the device in three-dimensional space. The depth sensor is fixed at the upper part of the main body 100 and connected with the inner wall of the main body 100 through a sensor mounting bracket. The depth sensor is a pressure type sensor, which converts the depth of the device in the hole by measuring the hydrostatic pressure. The measurement reference system also includes a data processing unit, which is fixed inside the main body 100 and connected with the posture sensor, the depth sensor and the annular ultrasonic sensor array 200 through data lines. The data processing unit processes and calculates the collected raw data to generate aperture and perpendicularity information, and transmits the data to the ground control system through a communication line. The measurement reference system provides a spatial coordinate reference for ultrasonic measurement, enabling accurate positioning of measurement data.

[0031] The use steps of the cast-in-place pile aperture and perpendicularity detection device provided by the embodiment are as follows: Preparation stage: Connect the device to the measurement control system and check if all components are functioning properly. Inject clean water into the clean water storage tank to ensure that the water storage capacity meets the measurement requirements.

[0032] Lowering stage: Slowly lower the detection device into the cast-in-place pile hole through hoisting equipment, and maintain sufficient gap between the device and the hole wall during the lowering process to avoid scratching and damaging the hole wall or the device. According to the data of the depth sensor, lower the device to the first measurement position.

[0033] Sealing stage: When the device reaches the measurement position, start the expansion control mechanism to inject pressure liquid into the upper sealing ring 401 and the lower sealing ring 402, so that the sealing rings radially expand and contact the hole wall, forming a local closed space. The expansion control mechanism will adjust the expansion degree of the sealing ring according to the hydraulic feedback to ensure good sealing effect and not cause excessive pressure on the hole wall.

[0034] Cleaning stage: After sealing, start the high-pressure pump 301 to spray clean water into the closed space through the annular nozzle array 302. The clean water is ejected from the nozzles at a certain pressure, flushing the high-sand mud in the local space and replacing it with a clean water environment. The cleaning process lasts for a period of time until the mud in the local space is fully replaced by clean water.

[0035] Measurement phase: After the formation of the clear water environment, the annular ultrasonic sensor array 200 is activated, and the 8 ultrasonic sensors 201 simultaneously emit ultrasonic signals and receive the echoes reflected from the hole wall. The system calculates the distance from the sensor to the hole wall based on the propagation time of the ultrasonic waves, and combines the data from the attitude sensor to determine the hole wall distance in each direction. Through these data, the system can calculate the hole diameter and perpendicularity information at the current position.

[0036] Moving phase: After the measurement is completed, the inflation control mechanism recovers the hydraulic fluid, causing the upper and lower sealing rings 401 and 402 to contract and return to their original state. Then the device is lowered to the next measurement position, and steps 3 to 5 are repeated to measure the next point.

[0037] Extraction phase: After completing the data collection at all measurement points, the device is extracted from the hole, cleaned, and maintained.

[0038] Data processing phase: The collected raw data is processed to generate a three-dimensional model of the bored pile hole, calculate the hole diameter and perpendicularity parameters at each position, and prepare a detection report.

[0039] Technical effects of the present embodiment The bored pile hole diameter and perpendicularity detection device provided by the present embodiment solves the problem of reduced ultrasonic measurement accuracy in high-sand-content mud environments by creating a hydraulic barrier ultrasonic measurement system, and has the following technical effects: Local clear water environment creation effect: The device forms a local closed space by contacting the upper and lower sealing rings 401 and 402 with the hole wall, and then forms a local clear water environment in this space through the hydraulic jetting device 300. This physical isolation method can effectively reduce the scattering factors on the ultrasonic propagation path and improve signal quality. In actual application, even in a mud environment with a sand content of 15%, the device can still create a local clear water environment with a sand content of less than 2%, providing good conditions for ultrasonic measurement.

[0040] Measurement accuracy improvement effect: Since the scattering and absorption of ultrasonic waves are significantly reduced when propagating in a clear water environment, signal attenuation is reduced, and echo signal strength and quality are improved. Experimental data show that in a high-sand environment, the measurement accuracy of the device is improved by about 75% compared to conventional ultrasonic measurement, and the measurement error is reduced from ±10 mm to ±2.5 mm.

[0041] Extended application environment effect: The device can work reliably in high-sand mud environments where conventional ultrasonic logging technology cannot be applied, significantly expanding the application range of ultrasonic logging technology. The device is suitable for mud environments with a sand content of up to 20%, while traditional ultrasonic logging devices cannot obtain accurate measurement results when the sand content exceeds 5%.

[0042] Operation continuity effect: The sealing structure 400 slows down the speed of clean water being contaminated by surrounding mud, prolonging the available measurement time. In practical applications, after creating a clean water environment, the device can maintain an effective measurement time window of about 30 seconds, sufficient to complete multiple sets of high-quality ultrasonic measurements without frequent repeated cleaning processes.

[0043] Comprehensive detection effect: The device integrates the annular ultrasonic sensor array 200 and the measurement reference system, enabling simultaneous acquisition of aperture and perpendicularity data, providing comprehensive detection results for the bored pile hole. The system can continuously detect the entire pile hole at intervals of 10 centimeters in a single lowering process, generating a complete three-dimensional model of the hole wall.

[0044] In summary, the bored pile aperture and perpendicularity detection device provided by the embodiment creates a temporary clean water measurement environment through the innovative mechanism of the hydraulic barrier, effectively solving the precision problem of ultrasonic measurement in a high-sand mud environment, and providing a reliable method for detecting the quality of bored piles. DETAILED DESCRIPTION Based on Embodiment 1, as shown in Figures 1-6 The present application provides an improved bored pile aperture and perpendicularity detection device, which adopts a coordinated layered structure design, further optimizing the structural layout and functional coordination of the device.

[0046] The telescopic central positioning device 600 includes a central shaft 601 and a plurality of support rods 602. The central shaft 601 is fixed inside the main body 100 and is arranged along the central axis of the main body 100. The support rods 602 are a plurality of rods, one end of which is hingedly connected to the main body 100, and the other end is provided with a contact wheel 604 in contact with the hole wall. The contact wheel 604 is made of wear-resistant polymer material, which can reduce the friction damage to the hole wall. The support rods 602 are evenly distributed around the central shaft 601 in a radial manner, and their expansion and contraction are controlled by the telescopic mechanism 605. The telescopic mechanism 605 is fixed on the central shaft 601 and controls the expansion angle of the support rods 602 through hydraulic or mechanical means.

[0047] The telescopic mechanism 605 includes a ring-shaped slider 606 and a push rod 607. The ring-shaped slider 606 is sleeved on the central shaft 601 and can slide axially along the central shaft 601. The push rod 607 is fixedly connected with the ring-shaped slider 606 at one end and connected with a driving device 608 inside the main body 100 at the other end. The outer periphery of the ring-shaped slider 606 is hingedly connected with one end of a connecting rod, and the other end of the connecting rod is hingedly connected with the middle part of the supporting rod 602. The driving device 608 is fixed inside the main body 100. The axial movement of the push rod 607 drives the ring-shaped slider 606 to slide along the central shaft 601, so as to change the unfolding angle of the supporting rod 602. The design concept of the telescopic central positioning device 600 is to provide only a slight central positioning function, rather than a complete fixing device. Therefore, the contact force between the supporting rod 602 and the hole wall is small, and only the approximate central position of the device in the hole needs to be maintained.

[0048] The upper sealing ring 401 and the lower sealing ring 402 include a plurality of independently controlled sealing segments 701. Each sealing segment 701 is a fan-shaped structure, and a plurality of sealing segments 701 are arranged circumferentially around the main body 100 to jointly form a complete annular sealing structure. The sealing segment 701 is made of wear-resistant rubber and flexible polymer composite material and has good elasticity and sealing performance. Each sealing segment 701 is independently connected with a hydraulic pump through a pressure control valve, and each sealing segment 701 is provided with a contact pressure sensor for real-time monitoring of the contact pressure between the sealing segment and the hole wall. The contact pressure sensor is embedded and installed on the outer surface of the sealing segment 701 near the contact position with the hole wall and is connected with a signal processing unit inside the main body 100 through a sensor lead wire. The signal processing unit is fixed inside the main body 100 and is used for receiving pressure data and transmitting the pressure data to a measurement reference system for processing.

[0049] The use steps of the bored pile hole diameter and verticality detection device provided by the embodiment are as follows: Preparation stage: Connect the device to the measurement control system and check whether the functions of each component are normal. Inject clean water into the clean water storage cabin 830 to ensure that the water storage capacity meets the measurement requirements.

[0050] Lowering stage: Slowly lower the detection device into the bored pile hole through hoisting equipment. During the lowering process, there is enough gap between the device and the hole wall to avoid scratching and damaging the hole wall or the device. According to the data of the measurement reference system, lower the device to the first measurement position.

[0051] Central positioning stage: When the device reaches the measurement position, first slightly unfold the telescopic central positioning device 600. The telescopic mechanism 605 controls the supporting rod 602 to unfold outward, so that the contact wheel 604 slightly contacts the hole wall, only to ensure that the device is approximately centered in the hole, rather than completely fixing the device position. At this time, the supporting rod 602 only provides the minimum necessary supporting force to avoid interfering with the subsequent sealing process.

[0052] Sealing stage: Based on center positioning, each sealing segment 701 is controlled to extend outward, contacting the hole wall to form a seal. Each sealing segment 701 uses a contact pressure sensor to monitor the contact pressure in real time. Based on this feedback, the system automatically adjusts the extension of each sealing segment 701 to ensure that all sealing segments 701 form appropriate contact with the hole wall, creating a locally enclosed space with good sealing and uniform pressure. Typically, a calibrated contact pressure threshold is set, and extension stops when the threshold is reached.

[0053] Cleaning and drainage phase: After the seal is formed, high-pressure pump 301 is activated, spraying clean water into the enclosed space through annular nozzle array 302. The clean water is ejected from the nozzles at a certain pressure, flushing the sand-laden mud in the local space and replacing it with a clean water environment. The cleaning process continues for a period of time until the mud in the local space is fully replaced by clean water.

[0054] Measurement Phase: Once the environment improves to an acceptable level, the circular ultrasonic sensor array 200 is activated for measurement. Eight ultrasonic sensors simultaneously transmit ultrasonic signals and receive echoes, allowing the system to calculate the distance to the hole wall in all directions. During this process, the centering device 600 continues to provide minimal support, maintaining relative stability.

[0055] Movement Phase: After the measurement is complete, the multi-segment adaptive sealing structure 700 is first retracted, with each sealing segment 701 retracted back to its original position. The retractable centering device 600 is then retracted, with the support rod 602 folded back close to the main body 100. The device is then lowered to the next measurement position, and steps 3 through 6 are repeated to measure the next point.

[0056] Extraction and Data Processing: After completing data collection at all measurement points, the device is removed from the hole, cleaned, and maintained. The raw data is then processed to create a 3D model of the bored pile hole. The hole diameter and verticality parameters at each location are calculated, and a test report is compiled.

[0057] Technical effects of this embodiment The improved bored pile bore diameter and verticality detection device provided in this embodiment solves the problem of device structure layout and functional coordination through a coordinated layered structure design, and has the following technical effects: Structural coordination effect: The retractable center positioning device 600 adopts a lightweight design and only provides basic center positioning functions. It does not pursue complete fixation, thus avoiding the sealing difficulty caused by excessive fixation of traditional anchoring systems.

[0058] Adaptive sealing effect: Each sealing segment 701 of the multi-segment adaptive sealing structure 700 can be independently controlled. Through real-time feedback from the contact pressure sensor, the degree of stretching can be automatically adjusted according to the irregular shape of the hole wall to form a uniform and fitting sealing effect.

[0059] Optimized operational sequence: The device utilizes a "centering, sealing, and simultaneous cleaning and drainage" operational sequence, enabling coordinated coordination among various functional units to avoid functional conflicts. Because the device no longer requires an absolute fixed position, measurements can be performed with minimal movement.

[0060] Improved engineering feasibility: This implementation method no longer pursues the ideal effects of "completely fixed position" and "completely isolated environment", but realizes the basic functions of the system through reasonable structural coordination, greatly improving the engineering feasibility of the device.

[0061] The above describes an embodiment of the present invention, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make more forms of equivalent embodiments based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A bored pile bore diameter and verticality detection device, comprising a main body, on which are provided an annular ultrasonic sensor array, a posture sensor and a depth sensor, characterized in that: Also includes: The hydraulic jet device includes a pump and an annular nozzle array fixed on the outer peripheral wall of the main body, the pump is connected to the annular nozzle array through a water outlet pipe, the pump is connected to a clean water source through a water inlet pipe, and the clean water is sprayed around through the annular nozzle array to form a local clean water environment; A sealing structure, comprising an upper sealing ring and a lower sealing ring respectively fixed to the upper and lower outer peripheral walls of the main body, wherein the upper sealing ring and the lower sealing ring are both made of a flexible material and are capable of radial expansion, and are used to contact with the hole wall to form a seal to form a local closed space around the annular ultrasonic sensor array; The sealing structure further includes a drainage channel communicating the inside and outside of the partially enclosed space.

2. The bored pile hole diameter and verticality detection device according to claim 1, characterized in that: The annular ultrasonic sensor array is fixed on the outer peripheral wall of the main body and includes a plurality of ultrasonic sensors arranged at equal intervals along the circumference of the main body, and is used to transmit ultrasonic waves and receive echoes reflected from the hole wall to measure the distance from the sensor to the hole wall.

3. The bored pile hole diameter and verticality detection device according to claim 1, characterized in that: The sealing structure further includes an expansion control mechanism, which is fixed inside the main body and communicates with the upper sealing ring and the lower sealing ring respectively through hydraulic pipes, and is used to control the expansion and contraction of the upper sealing ring and the lower sealing ring.

4. The bored pile hole diameter and verticality detection device according to claim 3, characterized in that: The expansion control mechanism includes a hydraulic pump, a pressure control valve and a pressure sensor. The hydraulic pump delivers pressurized liquid to the upper sealing ring and the lower sealing ring through a hydraulic pipeline. The pressure control valve is used to control the pressure of the liquid entering each sealing ring. The pressure sensor is used to monitor the pressure status of each sealing ring.

5. The bored pile hole diameter and verticality detection device according to claim 1, characterized in that: The annular ultrasonic sensor array includes a plurality of ultrasonic sensors, which are fixed to the main body via a bracket. The bracket is L-shaped, with one end fixedly connected to the outer peripheral wall of the main body and the other end provided with a sensor mounting seat.

6. The bored pile hole diameter and verticality detection device according to claim 1, characterized in that: The outer periphery of the upper sealing ring and / or the lower sealing ring is provided with a recessed portion, and the recessed portion can cooperate with the hole wall to form a drainage channel when a local sealed space is formed.

7. The bored pile hole diameter and verticality detection device according to claim 1, characterized in that: It also includes a data processing unit, which is connected to the posture sensor, depth sensor and annular ultrasonic sensor array respectively and is used to process the collected data.

8. The bored pile hole diameter and verticality detection device according to claim 1, characterized in that: The upper sealing ring and the lower sealing ring are both composed of multiple sealing segments distributed in a ring array. Each sealing segment is independently connected to a hydraulic pump through a pressure control valve. Each sealing segment is equipped with a contact pressure sensor for real-time monitoring of the contact pressure between the sealing segment and the hole wall. Each sealing segment monitors the contact pressure in real time through the contact pressure sensor and automatically adjusts the extension degree of each sealing segment according to the contact pressure.

9. The bored pile hole diameter and verticality detection device according to claim 1, characterized in that: It also includes a retractable center positioning device, which includes a central axis and multiple elastic support rods. The central axis is fixed inside the main body, one end of the elastic support rod is hingedly connected to the central axis, and the other end is provided with a contact block that contacts the hole wall.

10. A method for detecting the bore diameter and verticality of a bored pile, characterized in that: The following steps are involved: Lowering a detection device into a measuring position in a bored pile hole, the detection device comprising a main body, an annular ultrasonic sensor array, a hydraulic jet device, a sealing structure, and a measurement reference system; The sealing structure is activated, so that the upper sealing ring and the lower sealing ring expand radially and contact the hole wall to form a local closed space; Start the hydraulic jet device to spray clean water into the enclosed space through the annular nozzle array to flush the high-sand mud and form a local clean water environment; The annular ultrasonic sensor array is activated to transmit ultrasonic signals and receive echoes reflected from the hole wall; The distance from the sensor to the hole wall is calculated based on the ultrasonic propagation time, and the hole diameter and verticality information at the current position are determined by combining the data of the measurement reference system.

Images