Foundation pit pore-forming quality detection device

Abstract

The invention provides a foundation pit pore-forming quality detection device, and belongs to the field of pile foundation engineering detection, and the device specifically comprises a detection mechanism which can enter a foundation pit pore-forming and longitudinally move in the foundation pit pore-forming; the lifting rope is connected with the detection mechanism, when the winding device conducts winding and unwinding operation on the lifting rope, the detection mechanism is made to move longitudinally, the detection mechanism comprises a transverse distance measuring sensor and a middle rotating mechanism, and the transverse distance measuring sensor can collect inner diameter data of a foundation pit formed hole; the detection mechanism extends into the foundation pit formed hole, the transverse distance measuring sensor on the detection mechanism can measure the horizontal distance between the transverse distance measuring sensor and the inner wall of the foundation pit formed hole along with gradual extension of the detection mechanism, a detected signal is output to the external controller, visual data are reflected through the external controller, and the visual data can be displayed through the external controller. In this way, even if the inner wall of the foundation pit formed hole is peeled off or collapsed, detection personnel on the ground surface can know the condition, and therefore the detection accuracy is improved.

Description

Technical Field

[0001] It belongs to the field of pile foundation engineering testing, specifically involving a device for testing the quality of foundation pit drilling. Background Technology

[0002] As the lifeblood of national economic development, the stability and reliability of power infrastructure are of paramount importance. In the construction of power lines, especially transmission lines traversing complex terrain such as mountains and hills, tower foundations often employ deep pits (pile foundation holes). These pits are characterized by their great depth (often tens of meters), relatively small diameter, remote location, and complex geological conditions. The quality of the pit drilling, including hole depth, diameter, verticality, and hole wall integrity, is a key factor determining the foundation's bearing capacity and the overall safety of the project. Statistics show that substandard drilling quality accounts for over 30% of foundation construction quality accidents, highlighting the crucial importance of quality control in this stage.

[0003] Currently, the industry still widely uses traditional manual methods to inspect deep foundation pit boreholes: surveyors need to use simple lifting equipment to go down into the pit and use tools such as tape measures and hammers to conduct contact measurements.

[0004] However, due to the different locations and depths of the foundation pits, the environments inside the foundation pit boreholes also vary. For example, some foundation pit boreholes contain a lot of water. Although the water can be pumped out before testing, the soil layer at the bottom of the foundation pit is prone to peeling and collapse because it is soaked in water. As a result, when using simple tools for testing, it is impossible to collect data on the peeling areas inside the foundation pit borehole, which will seriously affect the quality of foundation pit borehole testing. Summary of the Invention

[0005] The purpose of this invention is to provide a device for detecting the quality of foundation pit drilling, which can improve the accuracy of foundation pit drilling quality detection and avoid false detections and misdetections.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is a foundation pit hole-forming quality inspection device, comprising a detection mechanism and a winding device. The detection mechanism is capable of entering the foundation pit hole and moving longitudinally within the foundation pit hole. The winding device is connected to a suspension rope, which is connected to the detection mechanism. When the winding device retracts or extends the suspension rope, it causes the detection mechanism to move longitudinally. The detection mechanism includes a lateral distance measuring sensor and a central rotating mechanism. The lateral distance measuring sensor can collect the inner diameter data of the hole formed in the foundation pit. The central rotating mechanism is connected to the lateral distance measuring sensor and is used to make the lateral distance measuring sensor move in a circular motion around the central axis of the hole formed in the foundation pit.

[0007] Furthermore, the detection mechanism also includes an attitude sensor, which includes an inertial measurement unit with a built-in nine-axis MEMS, capable of outputting the pitch and roll angles of the detection mechanism relative to the geographic coordinate system.

[0008] Furthermore, it also includes a positioning bracket for connecting the winding device and positioning the detection mechanism at the center axis of the pit.

[0009] Furthermore, the positioning bracket includes a base plate, a lateral extension arm, a control component, and a guide component. The base plate is connected to the winding device and is used to position the winding device. The lateral extension arm is mounted on the base plate and extends upwards towards the pit drilling. The control component is slidably connected to the lateral extension arm. The guide component is mounted on the control component, and the suspension rope is coupled to the guide component. By sliding the control component, the detection mechanism connected to the suspension rope is positioned at the central axis of the pit drilling.

[0010] Furthermore, the control assembly includes a control arm, a central disc, a telescopic arm, and an arc-shaped standard rod. The control arm is inserted into the lateral extension arm. The central disc is fixed to the end of the control arm and has a central flat opening. The inner end of the telescopic arm is movably connected to the central disc, allowing the telescopic arm to move around the central disc. The arc-shaped standard rod is fixed to the outer end of the telescopic arm.

[0011] Furthermore, there are two suspension ropes, which are parallel and symmetrically arranged, with the lower end of each rope connected to the detection mechanism.

[0012] Furthermore, a stabilizing frame is installed above the detection mechanism, which can contact the inner wall of the hole in the foundation pit to increase the stability of the detection mechanism as it moves downward.

[0013] Furthermore, the stabilizing frame includes a central strut, a lifting assembly, and arms. The central strut is located above the detection mechanism. The lifting assembly is connected to the central strut. There are at least three arms, and each arm is connected to a guy wire, the free end of which is connected to the lifting assembly.

[0014] Furthermore, a tray is provided below the stabilizer, and the tray is located between the stabilizer and the detection mechanism. The lower end of the frame arm is hinged to the tray.

[0015] Furthermore, the lifting assembly includes an adjusting plate and a lifting ring. The adjusting plate is screwed to the central support rod; the lifting ring is movably connected to the adjusting plate, and the two can rotate relative to each other. When the adjusting plate rotates, it can drive the lifting ring to move longitudinally, and apply force to the boom through the pull line.

[0016] Furthermore, a limiting component is connected to the central support rod, and the pull wire passes through the limiting component. When the limiting component moves longitudinally, it can apply a force to the pull wire.

[0017] Furthermore, the limiting assembly includes a limiting sleeve, an electric push rod, and a limiting rod. The limiting sleeve is fitted onto the central support rod and can move along the axial direction of the central support rod. The output end of the electric push rod is connected to the limiting sleeve to move the limiting sleeve. The limiting rod is fixed on the limiting sleeve, and a limiting hole is provided at the end of the limiting rod, through which the pull wire passes.

[0018] Furthermore, a guide tube is provided on the detection mechanism, and a pipe joint is connected to the lower end of the guide tube. The pipe joint is located below the detection mechanism, and a suction pipe is connected to the upper end of the guide tube, and a water pump is connected through the suction pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: by extending the detection mechanism into the foundation pit borehole, as the detection mechanism gradually extends, the lateral distance measuring sensor on the detection mechanism can measure the horizontal distance between itself and the inner wall of the foundation pit borehole, and output the detected signal to an external controller. The external controller reflects the visual data, so even if there is peeling or collapse on the inner wall of the foundation pit borehole, the surface inspection personnel can be aware of the situation, thereby improving the accuracy of the inspection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the application state structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the connection between the base plate and the support legs in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram showing the connection between the lateral extension arm and the control component in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the detection mechanism structure in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the stabilizer structure in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the auxiliary return arm structure in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the positioning bracket structure in Embodiment 2 of the present invention; Among them, 1-suspension rope, 2-base plate, 3-outrigger, 4-protrusion, 5-drive arm, 6-lateral extension arm, 7-conduit pipe, 8-adjustment arm, 9-center plate, 10-outer shell, 11-telescopic arm, 12-arc standard pole, 13-slanted arm, 14-guide wheel, 15-outer shell, 16-protective net device, 17-lateral distance measuring sensor, 18-longitudinal distance measuring sensor, 19-module platform, 2 0-Rotating assembly, 21-Rewinding drum, 22-Pattern, 23-Pipe connector, 24-Frame arm, 25-Central support rod, 26-Adjusting disc, 27-Lifting ring, 28-Limit sleeve, 29-Limit rod, 30-Auxiliary arm, 31-Returning component, 32-Auxiliary counterweight, 33-Electric push rod, 34-Gantry frame, 35-Crossbeam, 36-Displacement shell, 37-Auxiliary support arm, 38-Central flat opening, 39-Guide cable. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] See Figure 1 As shown, a foundation pit hole-forming quality inspection device includes a positioning bracket installed on the ground. A winding assembly is provided on the positioning bracket, and a suspension rope 1 is wound on the winding assembly. A detection mechanism is connected to the lower end of the suspension rope 1. When the winding assembly winds up or unwinds the suspension rope 1, the detection mechanism can move vertically. Thus, when the detection mechanism is located inside the foundation pit hole and moves vertically, the hole can be measured.

[0024] The aforementioned positioning bracket includes a base frame, which consists of a base plate 2 and legs 3. The legs 3 are arranged in a circular array around the base plate 2. The upper end of each leg 3 is hinged to the base frame, allowing the legs 3 to swing and increase or decrease the angle between the legs 3 and the base plate 2. The lower end of the legs 3 is hinged to a positioning foot. When controlling the support leg 3 to swing, if several support legs 3 swing at the same time, a better state can be achieved, which makes it easier to adjust the support leg 3. Specifically, several notches are provided at the edge of the base plate 2, and the upper end of each support leg 3 is located in the notch. A boss 4 is fixed on the lower surface of the base plate 2. A side groove is provided on the circumferential surface of the boss 4. The side groove is aligned with the notch. A worm gear is provided in the notch groove. A horizontal support rod is fixedly connected to the worm gear. The horizontal support rod is fixedly connected to the support leg 3. At the same time, the worm gear is axially connected to the side groove. A central channel is provided inside the boss 4. The central channel extends vertically and communicates with the side slot. A positioning sleeve is installed on the lower surface of the boss 4. The positioning sleeve is coaxially arranged with the central channel on the boss 4. An inner groove is provided on the inner wall of the positioning sleeve. A drive arm 5 is provided inside the positioning sleeve. The upper part of the drive arm 5 extends into the central channel, and the lower part of the drive arm 5 cooperates with the inner groove of the positioning sleeve. When the drive arm 5 rotates, the support arm can swing. The drive arm 5 includes a lower half and an upper half. The lower half is a cylinder with a hand-held protrusion and a limiting ring. The inner groove is coupled to the limiting ring. The lower end of the upper half is connected to the upper end of the lower half, and the two are coaxially arranged. When the lower half rotates, the upper half can also rotate. The upper half is a worm gear structure. After the upper half is engaged with the worm wheel, the rotation of the upper half can make the worm wheel rotate, thereby driving the support leg 3 to swing.

[0025] Depending on the application environment, the position of the detection mechanism in this device varies. For example, when the positioning bracket needs to be placed directly above the hole in the foundation pit, the detection mechanism is set coaxially with the base plate 2. A central opening is provided on the base plate 2, and a central channel is also provided on the boss 4 and the drive arm 5. The cable winding assembly is installed on the base plate 2 and is located above the base plate 2, so that the lifting rope can pass through the central channel on the drive arm 5. See Figures 1 to 3 As shown, if the positioning bracket needs to be set on the side of the foundation pit hole, a lateral extension arm 6 needs to be installed on the base plate 2. A guide tube 7 is installed on the lateral extension arm 6. The guide tube 7 becomes a flat tube. The lateral extension arm 6 is connected to a guide assembly. At this time, the winding assembly is still located above the base plate 2, but the suspension rope 1 passes through the guide tube 7 and the guide assembly in sequence. However, at this time, the position of the guide assembly needs to be adjusted so that the detection mechanism and the foundation pit hole are in a coaxial state, so as to ensure that the detection mechanism will not collide with the inner wall of the foundation pit during the longitudinal movement.

[0026] Specifically, an end slot is provided on the lateral extension arm 6. The end slot starts from the outer end of the lateral extension arm 6 and extends towards the base plate 2. The guide component is installed on the control component and is connected to the lateral extension arm 6. The lateral extension arm 6 can also be connected to an auxiliary support arm 37. The control assembly includes a control arm 8, which is located in an end slot and is movable. A locking hole is provided on the transverse extension arm 6, and a locking screw is screwed into the locking hole. A center plate 9 is fixed at the outer end of the control arm 8. A guide assembly is installed on the center plate 9. A telescopic arm 11 is axially connected to the center plate 9. An arc-shaped standard rod 12 is fixed at the outer end of the telescopic arm 11. By swinging the telescopic arm 11, the arc-shaped standard rod 12 can move around the center of the center plate 9. When the telescopic arm 11 is connected to the central plate 9, a flange is provided at the edge of the central plate 9, and a locking groove is provided on the flange. The locking groove extends along the circumference of the central plate 9, and the end of the locking groove is connected to form a closed loop. The outer body 10 is connected through the flange. The inner side of the outer body 10 is provided with a locking protrusion, which fits in the locking groove. The inner end of the telescopic arm 11 is fixed on the outer body 10, and the telescopic arm 11 extends along the radial direction of the outer body 10. In this way, the position of the guide component can be adjusted by adjusting the control component. A central flat opening 38 is provided on the central plate 9, and the suspension rope 1 can pass through the central flat opening 38.

[0027] The aforementioned guiding assembly includes a fixed plate, which is bolted to the lower surface of the central plate 9. A slanted arm 13 is fixed on the fixed plate, and a guide wheel 14 is connected to the lower end of the slanted arm 13 via a U-shaped frame. There are two guide wheels 14, and the suspension rope 1 passing through the central flat opening 38 can pass between the two guide wheels 14. Before inspecting the foundation pit borehole, the length of the telescopic arm 11 is adjusted so that the length of the telescopic arm 11 is equal to the diameter of the foundation pit borehole. Then, the position of the central plate 9 is changed by moving the control arm 8. While adjusting the position of the central plate 9, the telescopic arm 11 swings, thereby driving the arc-shaped standard rod 12 to perform a circular motion. A suspension rod can be detachably connected to the arc-shaped standard rod 12. When the suspension rod can contact the inner wall of the foundation pit borehole during the circular motion, the position of the control arm 8 can be locked, thereby completing the positioning of the guiding assembly. At this time, when the detection mechanism is controlled to move vertically, the detection mechanism moves on the central axis of the foundation pit borehole to avoid collision between the detection mechanism and the inner wall of the foundation pit.

[0028] See Figure 1 and Figure 4As shown, in this technical solution, the testing mechanism includes an outer shell 15, which is connected to the suspension rope 1. The outer shell 15 adopts a cylindrical streamlined structure design with an overall diameter of 150 mm and a height of 300 mm, ensuring that it can smoothly enter pits with common diameters (≥600 mm). Simultaneously, it has sufficient internal space to accommodate all components. The main body of the outer shell is made of high-strength aluminum alloy (such as 6061-T6), balancing lightweight and structural strength. Key joints are sealed with O-rings, achieving an IP67 protection rating, effectively preventing the intrusion of mud and water from the pit. The surface undergoes hard anodizing treatment to enhance wear and corrosion resistance.

[0029] A detachable protective net device 16 is specially installed at the front end of the outer casing 15. The protective net is made with precision stamping process, and the mesh diameter is strictly controlled within 5 mm. It can effectively block foreign objects from entering without affecting airflow. The bottom of the equipment is equipped with a precisely calculated counterweight weighing 1.5 kg. Through the principle of gravity balance, it ensures that the equipment can maintain an ideal vertical working posture under any working condition. A laser rangefinder is installed inside the housing 15. The laser rangefinder includes two lateral rangefinders 17 and one longitudinal rangefinder 18. The lateral rangefinders 17 have a measurement range (0.05m~15m) that fully meets the requirements for aperture measurement, with an accuracy of ±1.5mm and a high measurement frequency (≥100Hz), suitable for dynamic scanning. The two lateral rangefinders 17 are symmetrically installed at 180°, which allows for mutual verification to improve reliability and also detects asymmetric deformation of the aperture wall. The longitudinal rangefinder 18 is an ultrasonic rangefinder with a measurement range of 0.3m~5m and an accuracy of ±5mm. Its non-contact measurement characteristics are suitable for complex pit bottom surfaces, used to determine whether the detector is close to the bottom of the aperture, thereby accurately calibrating the aperture depth.

[0030] The aforementioned outer casing 15 also includes a central rotating mechanism. The central rotating mechanism includes a module platform 19 connected to a rotating component 20. A lateral distance measuring sensor 17 is mounted on the module platform 19. Through the operation of the rotating component 20, the lateral distance measuring sensor 17 performs circular motion to achieve dynamic scanning. Specifically, the rotating component 20 uses a miniature brushless DC motor in conjunction with a precision planetary gear reducer to drive the module platform 19 to rotate. The speed is adjustable (e.g., 10-60 RPM) to ensure different point cloud density requirements. The motor has a built-in photoelectric encoder for accurate feedback of the rotation angle.

[0031] An attitude sensor is also installed inside the housing 15. The attitude sensor includes an inertial measurement unit (IMU) with a built-in nine-axis MEMS, which integrates a three-axis gyroscope, a three-axis accelerometer, and a three-axis magnetometer. Through sensor fusion algorithms (such as Kalman filtering), it can output the pitch and roll angles of the detection mechanism relative to the geographic coordinate system in real time with an accuracy of up to 0.1°, thereby enabling all-round motion attitude monitoring. The attitude sensor also includes an electric slip ring assembly that can achieve 360° unrestricted continuous rotation to ensure the stability of signal and power transmission during the movement of the device.

[0032] The main control unit and wireless communication module are also provided inside the outer casing 15. The main control unit adopts a high-performance microcontroller based on the ARM Cortex-M7 core, with a main frequency of over 400MHz. It has powerful floating-point operation capabilities and rich I / O interfaces, and can process multi-channel sensor data in real time. The wireless communication module uses a 2.4GHz Wi-Fi module based on the IEEE 802.11n protocol, which has a high transmission rate, low latency, and strong penetration capability, and can ensure stable data transmission within a 50-meter line-of-sight range.

[0033] A power supply module is also installed inside the outer casing 15. The power supply module is a built-in high-energy-density lithium polymer battery pack with a typical capacity of 10,000mAh. It supplies power to each module through an efficient power management circuit to ensure continuous operation for more than 8 hours.

[0034] The aforementioned winding assembly includes a winding drum 21 and a drive motor. The output shaft of the drive motor is connected to a reducer, and the output end of the reducer is connected to the central shaft of the winding drum 21. One end of the suspension rope 1 is connected to the winding drum 21. When the drive motor drives the winding drum 21 to work, it realizes the winding of the suspension rope 1. The other end of the suspension rope 1 is fixed to the outer shell 15 of the detection mechanism. Thus, the vertical movement of the detection mechanism is realized by the winding and unwinding operation of the suspension rope 1. It should be noted that a cord straightening assembly is also provided on the side of the aforementioned winding drum 21. The lifting rope 1 works in conjunction with the cord straightening assembly to straighten the cord during the winding process of the lifting rope 1, thus preventing the cord from getting tangled. The drive motor is a 400W AC servo motor, paired with a 1:10 precision planetary reducer. The servo motor has a built-in 24-bit high-resolution absolute encoder, which can precisely control the speed and angle, thereby achieving closed-loop control of the length and speed of the hoisting rope 1. The hoisting rope 1 is made of 4mm diameter stainless steel aviation wire rope, which is high in strength and has good flexibility.

[0035] A tray 22 is provided on the aforementioned suspension rope 1. The tray 22 has a storage cavity inside. The tray 22 is connected to a guide tube that passes through the outer shell 15. A pipe joint 23 is fixed at the lower end of the guide tube. The pipe joint 23 has a built-in filter. A water pump is provided in the storage cavity of the tray 22. The water pump is connected to the upper end of the guide tube through a suction pipe. The water pump is a self-priming centrifugal pump. When the winding assembly works, the outer shell 15 moves downward. If there is water accumulation at the bottom of the foundation pit, the water pump can suck the water at the bottom of the foundation pit into the storage cavity of the tray 22, thereby reducing the water accumulation at the bottom of the foundation pit. This facilitates the detection of the depth of the foundation pit and increases the detection accuracy. In another embodiment, the water pump described above can be mounted on the positioning bracket. In this case, the diameter of the tray 22 is larger, and the tray 22 can cover the top of the detection mechanism. When there is a lot of water in the pit, the water pump is a jet pump, which drains the water in the pit to the outside of the pit. A barrier component is provided on the upper surface of the tray 22. The barrier component is a cylinder, which encloses the storage area on the tray 22. In this case, the tray 22 can provide a certain degree of protection for the detection mechanism and increase the detection accuracy.

[0036] Regardless of which embodiment is adopted, a stabilizing frame can be provided on the tray 22. The stabilizing frame can increase the stability of the detection mechanism when it moves downward and prevent the detection mechanism from shaking significantly.

[0037] See Figure 1 , Figure 5 and Figure 6 As shown, the stabilizer includes at least three arms 24, each hinged to the upper surface of the tray 22. A central support rod 25 is fixed to the upper surface of the tray 22. The central support rod 25 has a threaded section, through which a lifting assembly is connected. The lifting assembly includes an adjusting plate 26 and a lifting ring 27. The adjusting plate 26 and the lifting ring 27 are movably connected, allowing the lifting ring 27 to rotate relative to the adjusting plate 26. A limit assembly is provided on the central support rod 25, including a limit sleeve 28 fitted onto the central support rod 25. A limit rod 29 is fixed to the limit sleeve 28. The end of 9 is provided with a limiting hole. The number of limiting rods 29 is the same as that of the frame arm 24. A pull line 39 is provided on the frame arm 24. The upper end of the pull line 39 passes through the limiting hole and is connected to the lifting ring 27. After the adjusting plate 26 is rotated, the adjusting plate 26 can move axially. At this time, the pull line 39 applies a lifting force to the frame arm 24, causing the frame arm 24 to flip and change the angle formed between the frame arm 24 and the upper surface of the tray 22. An auxiliary return component 31 is provided at the upper end of the frame arm 24. During the downward movement of the detection mechanism, the auxiliary return component 31 can contact the inner wall of the pit. The auxiliary return arm includes an arc-shaped curved auxiliary arm 30, which is hinged to the upper end of the frame arm 24. The hinge point is close to the upper end of the auxiliary arm. The auxiliary arm 30 can rotate around the hinge point. A return member 31 is connected between the auxiliary arm 30 and the frame arm 24. The return member 31 is an elastic curved sheet or a compression return spring, which causes the return spring to deform after being subjected to force and has a restoring force at this time. An auxiliary counterweight 32 is fixed on the aforementioned pull wire 39. When the detection mechanism moves downward within the pit hole, the auxiliary return component 31 can contact the pit wall through the action of the auxiliary counterweight 32, and apply a certain force to the pit wall. If there is an unstable surface layer on the pit wall, it can fall off after being subjected to the force of the auxiliary return component 31, forming a recessed area on the pit wall. Under the influence of the auxiliary counterweight 32, the auxiliary return component 31 moves to the recessed area formed on the pit wall. Then, during the upward movement of the detection mechanism, it can affect the reset of the detection mechanism. Since the drive motor has a built-in encoder, it can know the depth of the recessed area formed on the inner wall of the pit, which helps to improve the quality of the pit hole detection.

[0038] A base tray 22 is fixed on the central support rod 25. An electric push rod 33 is installed on the base tray 22. The upper end of the electric push rod 33 is connected to the limiting sleeve 28. The action of the electric push rod 33 can make the limiting sleeve 28 move longitudinally, and then apply force to the pull line 39 through the limiting rod 29, so that the frame arm 24 can be flipped.

[0039] In this technical solution, there are two suspension ropes 1, and the two suspension ropes 1 are arranged parallel to each other. The two suspension ropes 1 are symmetrically arranged with the central axis of the detection mechanism as the center line. At the same time, there are also two guide components, so as to prevent the detection mechanism from rotating during longitudinal movement.

[0040] Example 2, see Figure 7 As shown, based on the above embodiment, the structure of the positioning bracket can be improved. In this embodiment, the positioning bracket includes two portal frames 34, and a crossbeam 35 is connected between the two portal frames 34. A displacement shell 36 is provided on the crossbeam 35. The displacement shell 36 can move on the crossbeam 35. The displacement shell 36 has a lower opening. The winding assembly and the base plate 2 are both located inside the displacement shell 36, so that the detection mechanism can be moved out from the lower opening on the displacement shell 36. This embodiment is suitable for drilling foundation pits with larger diameters. A scale that can measure the length position can be installed on the crossbeam 35. The displacement shell 36 can be moved to the required position so that the detection mechanism is as close as possible to the central axis of the foundation pit drilling, thereby improving the measurement quality.

[0041] Finally, this technical solution also includes an external controller. The external controller can receive the electrical signals output by the aforementioned laser rangefinder and convert them into visible data. Simultaneously, the external controller is connected to the drive motor in the winding device, enabling it to send working signals to the drive motor and activate it. The external controller is a well-known brand industrial-grade ruggedized tablet PC with the following recommended configuration: 8-core processor, 4GB RAM, 64GB storage, 10.1-inch sunlight-visible IPS touchscreen, IP65 protection rating, and over 10 hours of battery life. It also features a rich array of interfaces (USB, HDMI, RS232, etc.) and wireless connectivity (Wi-Fi, 4G / 5G optional).

[0042] Control software can be installed within the external controller. This control software is based on existing technology, primarily developed using the Qt or Android platform, and employs a modular architecture. Its main functional modules include: Equipment Management Module: Responsible for scanning, connecting, and configuring detectors and winding machines.

[0043] Task planning module: Provides an intuitive interface for creating inspection tasks, allowing users to input the pit ID, design parameters, and set the descent speed, scanning speed, etc.

[0044] Real-time monitoring module: This is the core human-machine interface, which is dynamically displayed in a multi-view format.

[0045] Digital dashboard: Displays current depth, diameter, and tilt angle in real time.

[0046] 2D cross-sectional view: Real-time drawing of the cross-sectional outline of the foundation pit at the current depth.

[0047] 3D point cloud view: Real-time rendering of the 3D foundation pit model being generated, which can be rotated and zoomed for viewing.

[0048] Data waveform graph: Displays depth-diameter curves, attitude angle change curves, etc.

[0049] Data post-processing module: After the inspection is completed, point cloud editing tools (denoising, filtering, segmentation) are provided to perform more refined geometric analysis, such as volume calculation and defect annotation.

[0050] Report generation module: Based on customizable templates, it automatically generates test reports that include project information, test data tables, 2D / 3D graphics and conclusions, and supports one-click export and printing.

[0051] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detecting the quality of foundation pit drilling, characterized in that, include: The detection mechanism is capable of entering the excavation hole and moving longitudinally within it. The winding device is connected to a suspension rope (1), which is connected to the detection mechanism. When the winding device winds up and unwinds the suspension rope (1), it causes the detection mechanism to move longitudinally. The detection mechanism includes: The lateral distance measuring sensor (17) is capable of collecting the inner diameter data of the hole formed in the foundation pit; The central rotating mechanism is connected to the lateral ranging sensor and is used to make the lateral ranging sensor move in a circular motion around the central axis of the foundation pit hole.

2. The foundation pit drilling quality testing device according to claim 1, characterized in that, The detection mechanism also includes: Attitude sensor; The attitude sensor includes an inertial measurement unit with a built-in nine-axis MEMS, which can output the pitch and roll angles of the detection mechanism relative to the geographic coordinate system.

3. The foundation pit drilling quality testing device according to claim 1, characterized in that, It also includes a positioning bracket for connecting the winding device and positioning the detection mechanism on the central axis of the pit.

4. The foundation pit drilling quality testing device according to claim 3, characterized in that, The positioning bracket includes: The base plate (2) is connected to the winding device and is used to position the winding device; A lateral extension arm (6) is mounted on the base plate (2) and extends above the pit hole; The control component is slidably connected to the lateral extension arm (6); The guide component is installed on the control component. The suspension rope (1) is coupled to the guide component. By sliding the control component, the detection mechanism connected to the suspension rope (1) is positioned at the central axis of the foundation pit hole.

5. The foundation pit drilling quality testing device according to claim 4, characterized in that, The control component includes: The control arm (8) is inserted into the lateral extension arm (6); A central disc (9) is fixed to the end of the control arm (8), and a central flat opening (38) is provided on the central disc (9); The telescopic arm (11) is movably connected to the central disk (9) at its inner end, so that the telescopic arm (11) can move around the central disk (9); An arc-shaped standard rod (12) is fixed to the outer end of the telescopic arm (11).

6. The foundation pit drilling quality testing device according to claim 1, characterized in that, The suspension rope (1) consists of two ropes, which are parallel and symmetrically arranged. The lower end of each rope (1) is connected to the detection mechanism.

7. The foundation pit drilling quality testing device according to claim 6, characterized in that, A stabilizing frame is provided above the detection mechanism. The stabilizing frame can contact the inner wall of the hole in the foundation pit to increase the stability of the detection mechanism as it moves downward.

8. The foundation pit drilling quality testing device according to claim 7, characterized in that, The stabilizer includes: The central strut (25) is located above the detection mechanism; The lifting assembly is connected to the central strut (25); There are at least three booms (24), and each boom (24) is connected to a guy wire (39), the free end of which is connected to the lifting assembly.

9. The foundation pit drilling quality testing device according to claim 8, characterized in that, A tray (22) is provided between the stabilizer and the detection mechanism, and the tray (22) is connected to the lower end of the arm (24).

10. The foundation pit drilling quality testing device according to claim 8, characterized in that, The lifting component includes: The adjusting plate (26) is screwed to the central support rod (25); The lifting ring (27) is movably connected to the adjusting plate (26), and the two can rotate relative to each other; When the adjustment disc (26) rotates, it can drive the lifting ring (27) to move longitudinally and apply force to the boom (24) through the pull line (39).

11. The foundation pit drilling quality testing device according to claim 10, characterized in that, A limiting component is connected to the central support rod (25), and a pull wire (39) passes through the limiting component. When the limiting component moves longitudinally, it can apply a force to the pull wire (39).

12. The foundation pit drilling quality testing device according to claim 11, characterized in that, The limiting component includes: The limiting sleeve (28) is sleeved on the central support rod (25) and can move along the axial direction of the central support rod (25); An electric push rod (33) has its output end connected to a limiting sleeve (28) to move the limiting sleeve (28); A limiting rod (29) is fixed on a limiting sleeve (28), and a limiting hole is provided at the end of the limiting rod (29), through which the pull wire (39) passes.

13. The foundation pit drilling quality testing device according to any one of claims 1-12, characterized in that, The detection mechanism is provided with a guide tube, the lower end of which is connected to a pipe connector (23), which is located below the detection mechanism. The upper end of the guide tube is connected to a suction pipe, and a water pump is connected through the suction pipe.

Images