Bridge pile foundation pile bottom sediment thickness detection device
Patent Information
- Application Number
- CN202522420459.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-11-14
AI Technical Summary
[0002]在桥梁桩基施工中，桩底沉渣厚度是影响桩基承载力的关键指标，传统检测方法存在人为误差大、受孔壁稳定性影响、无法有效排除倾斜干扰、数据难以数字化追溯等问题，特别是在深大桩孔中，地基不平、孔壁摩擦、沉渣表面松软不平等因素，极易导致测量杆下放偏移、触感判断失准，最终使得检测结果可靠性不足
[0014]1.本申请，通过四个气泡水平仪与四个电动伸缩腿的闭环控制系统，结合模糊PID控制算法，能快速、精准地自动调平定位盘，为测量建立稳定、垂直的基准平面，从根本上消除了地基不平对测量精度的影响；
Smart Images
Figure CN224799574U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of bridge pile foundation construction, and in particular to a device for detecting the thickness of sediment at the bottom of bridge pile foundations. Background Technology
[0002] In bridge pile foundation construction, the thickness of the sediment at the bottom of the pile is a key indicator affecting the bearing capacity of the pile foundation. Traditional testing methods have problems such as large human error, influence by the stability of the borehole wall, inability to effectively eliminate tilt interference, and difficulty in digital traceability of data. Especially in deep and large pile holes, uneven foundation, borehole wall friction, soft sediment surface and other factors can easily cause the measuring rod to deviate when lowered and the tactile judgment to be inaccurate, ultimately resulting in insufficient reliability of the test results. Utility Model Content
[0003] To address the aforementioned problems, this application provides a device for detecting the thickness of sediment at the bottom of bridge pile foundations.
[0004] This application provides a device for detecting the thickness of sediment at the bottom of bridge pile foundations, which adopts the following technical solution:
[0005] A device for detecting the thickness of sediment at the bottom of bridge pile foundations includes a positioning plate. Bubble levels are fixedly installed around the top of the positioning plate, and electrically operated telescopic legs are fixedly installed around the bottom of the positioning plate. Ball heads are fixedly connected to the extended ends of the electrically operated telescopic legs, and connecting sleeves are fitted onto the surfaces of the ball heads. A base plate is fixedly connected to the bottom of the connecting sleeves. A sponge ring is fixedly connected to the center of the top of the positioning plate. A measuring rod is slidably connected to the inner wall of the positioning plate, and laser emitters are fixedly installed around the bottom of the positioning plate.
[0006] As a preferred technical solution of this application, the electric telescopic leg and the bubble level are located on the same axis. Oil boxes are fixedly connected to all four sides of the top of the positioning plate. A rotating shaft is rotatably connected to the inner wall of the oil box. Oil wheels are fixedly connected to the surface of the rotating shaft. There are four oil wheels, which are arranged in a circular array. The surface of the oil wheels is in contact with the surface of the measuring rod. The inner wall of the sponge ring is in sliding contact with the surface of the measuring rod.
[0007] As a preferred technical solution of this application, the bubble level integrates a level sensing module, which is used to collect the tilt angle data of the positioning disk. The positioning disk is equipped with a support leg control module, which is communicatively connected to the level sensing module. The laser emitter integrates a laser reference module. The measuring rod is equipped with a displacement sensing module. The positioning disk integrates a central processing unit, which is signal-connected to the level sensing module, the support leg control module, the laser reference module, and the displacement sensing module.
[0008] As a preferred technical solution of this application, the outrigger control module is used to receive data from the horizontal sensing module and drive multiple independently extendable outriggers to perform adjustment actions.
[0009] As a preferred technical solution of this application, the laser reference module is used to emit a laser beam parallel to the theoretical measurement axis and project the laser beam onto the bottom of the pile for imaging, and the displacement sensing module is used to detect and record the displacement of the measuring rod relative to the positioning disk.
[0010] As a preferred technical solution of this application, the central processing unit is used to control the horizontal sensing module, the outrigger control module, the laser reference module and the displacement sensing module, and to receive data from the displacement sensing module to calculate and output the sediment thickness value.
[0011] As a preferred technical solution of this application, the displacement sensing module is a capacitive displacement sensor.
[0012] As a preferred technical solution of this application, the output end of the central processing unit is also communicatively connected to a prompting module, which issues a prompting signal indicating successful leveling when the positioning disk reaches a horizontal state.
[0013] In summary, this application includes at least one of the following beneficial technical effects of the bridge pile foundation sediment thickness detection device:
[0014] 1. This application, through a closed-loop control system of four bubble levels and four electric telescopic legs, combined with a fuzzy PID control algorithm, can quickly and accurately automatically level the positioning plate, establish a stable and vertical reference plane for measurement, and fundamentally eliminate the influence of uneven foundation on measurement accuracy.
[0015] 2. In this application, during the lowering of the measuring rod, four polytetrafluoroethylene oil wheels are continuously lubricated with oil. Combined with the cleaning function of the sponge ring, the frictional resistance between the rod body and the hole wall is effectively reduced. At the same time, by monitoring the speed of the oil wheels, the friction state can be calculated in reverse to achieve intelligent early warning. The visual reference provided by the laser emitter helps to judge the uniformity of sediment distribution and helps the measuring rod to align with the pile center to ensure the representativeness of the measurement point.
[0016] 3. In this application, a capacitive displacement sensor is used for high-frequency sampling. Combined with the wavelet transform filtering algorithm of the central processing unit, noise can be effectively eliminated and the displacement change point of the measuring rod from contacting the sludge surface to touching the solid bearing layer can be accurately identified. The system automatically deducts the elastic compression deformation of the measuring rod and uses laser imaging differences for data verification, which greatly improves the accuracy and reliability of the thickness value.
[0017] 4. In this application, the entire process from automatic leveling, intelligent placement, data acquisition to result calculation is controlled by a central processing unit, and the data is uploaded to the engineering management platform in real time through a 4G module, realizing the automation, digitalization and traceability of the testing process, reducing human intervention, and improving testing efficiency and data reliability. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this application;
[0019] Figure 2 This application Figure 1 Schematic diagram of the middle and bottom structure;
[0020] Figure 3 This is a schematic diagram of the tanker component structure of this application;
[0021] Figure 4 This is the architecture diagram of the detection system in this application.
[0022] Explanation of reference numerals in the attached diagram: 1. Positioning plate; 2. Bubble level; 3. Base; 4. Electric telescopic leg; 5. Ball head; 6. Connecting sleeve; 7. Measuring rod; 8. Laser emitter; 9. Oil box; 10. Rotating shaft; 11. Oil wheel; 12. Sponge ring. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0024] See Figure 1-4 A device for detecting the thickness of sediment at the bottom of bridge pile foundations includes a positioning plate 1. Bubble levels 2 are fixedly installed around the top of the positioning plate 1. Electric telescopic legs 4 are fixedly installed around the bottom of the positioning plate 1. Ball heads 5 are fixedly connected to the extended ends of the electric telescopic legs 4. Connecting sleeves 6 are fitted on the surface of the ball heads 5. A base plate 3 is fixedly connected to the bottom of the connecting sleeves 6. A sponge ring 12 is fixedly connected to the center of the top of the positioning plate 1. A measuring rod 7 is slidably connected to the inner wall of the positioning plate 1. Laser emitters 8 are fixedly installed around the bottom of the positioning plate 1. The electric telescopic legs 4 and the bubble levels 2 are located on the same axis. Oil boxes 9 are fixedly connected around the top of the positioning plate 1. A rotating shaft 10 is rotatably connected to the inner wall of the oil box 9. Oil wheels 11 are fixedly connected to the surface of the rotating shaft 10. There are four oil wheels 11, which are arranged in a ring array. The surface of the oil wheels 11 is in contact with the surface of the measuring rod 7. The inner wall of the sponge ring 12 is in sliding contact with the surface of the measuring rod 7.
[0025] In this application, firstly, on-site technicians hoist and slowly lower the assembled testing device to the borehole of the pile foundation to be tested, so that the chassis 3 is initially stably supported on the foundation around the pile hole. At this time, the four bubble levels 2 integrated on the top of the positioning plate 1 immediately begin to work. Their built-in high-precision level sensing modules (such as MEMS tilt sensors) collect the tilt angle data of the positioning plate 1 in the X and Y axes in real time at a frequency of 100 times per second, and transmit these data to the central processing unit (using ARM) via digital signals. After receiving the tilt angle data, the central processing unit (CPU) uses a built-in fuzzy PID control algorithm to calculate the compensation required for each electric telescopic leg 4 in real time. It then sends differentiated control commands to the servo motors of the four electric telescopic legs 4 through the outrigger control module (using CAN bus communication). The electric telescopic legs 4 perform precise independent telescopic adjustment according to the commands. They adopt a ball screw structure and automatically compensate for the tilt caused by uneven foundation through the hinged engagement of ball head 5 and connecting sleeve 6. When the readings of the four bubble levels 2 all reach within ±0.1°, the CPU sends a continuous beep and a flashing green LED signal through the prompt module (audio-visual alarm) to indicate that the leveling is complete.
[0026] After the positioning plate 1 reaches a horizontal position, the technician manually lowers the measuring rod 7 from the center hole of the positioning plate 1. The measuring rod 7 is a stainless steel rod with segmented threaded connections. During the lowering process, the surface of the measuring rod 7 maintains rolling contact with the four oil rollers 11. The oil rollers 11 are made of polytetrafluoroethylene (PTFE), and their internal oil storage chambers evenly coat the surface of the measuring rod 7 with lubricating oil through capillary action, effectively reducing the coefficient of friction. At the same time, the high-viscosity sealing grease filled in the sponge ring 12 can remove mud and impurities from the surface of the measuring rod 7. When the bottom of the measuring rod 7 approaches the bottom of the pile, the laser emitter 8 is activated. Its integrated laser reference module emits a laser beam parallel to the axis of the measuring rod 7, forming a clear light spot at the bottom of the pile. The technician then... By observing the imaging of the light spot on the sediment surface, the uniformity of sediment distribution can be initially determined. When the bottom of the measuring rod 7 contacts the sediment surface, the displacement sensing module (capacitive grating sensor) begins to record the initial position. The measuring rod 7 continues to be pressed down until it touches the solid bearing layer. At this time, the capacitive grating sensor transmits the relative displacement data of the measuring rod 7 to the central processing unit in real time. The central processing unit automatically deducts the elastic compression deformation of the measuring rod 7 through the built-in algorithm, and performs data verification by combining the imaging difference of the laser beam on the sediment surface and the bearing layer. Finally, the sediment thickness value is displayed on the touch screen. Throughout the process, the central processing unit uploads the data to the engineering management platform in real time through the 4G module to realize the digital traceability of the detection process.
[0027] The bubble level 2 integrates a level sensing module, which collects the tilt data of the positioning disk 1. The positioning disk 1 is equipped with a leg control module, which communicates with the level sensing module. The laser emitter 8 integrates a laser reference module, and the measuring rod 7 is equipped with a displacement sensing module. The positioning disk 1 integrates a central processing unit, which is connected to the level sensing module, leg control module, laser reference module, and displacement sensing module. The leg control module receives data from the level sensing module and drives multiple independently extendable legs to perform adjustment actions. The laser reference module emits a laser beam parallel to the theoretical measurement axis and projects it onto the pile bottom for imaging. The displacement sensing module detects and records the displacement of the measuring rod 7 relative to the positioning disk 1. The central processing unit controls the level sensing module, leg control module, laser reference module, and displacement sensing module, and receives data from the displacement sensing module to calculate and output the sediment thickness value. The displacement sensing module is a capacitive displacement sensor. The output of the central processing unit is also connected to a prompting module, which issues a leveling success signal when the positioning disk 1 reaches a level state.
[0028] In this application, the horizontal sensing module initiates an adaptive calibration program. By collecting a 30-second sequence of tilt angle data, it automatically eliminates the influence of micro-vibration of the foundation. During the leveling process, the outrigger control module adopts a two-stage strategy of coarse adjustment followed by fine adjustment. In the first stage, the four electric telescopic legs 4 synchronously and rapidly extend and retract to the estimated horizontal position. In the second stage, nanometer-level fine adjustment is performed. When the measuring rod 7 is lowered at a speed of 0.5 meters per second, the rotational speed signal of the oil tanker 11 is collected in real time by the encoder built into the shaft 10. The central processing unit calculates the frictional resistance between the measuring rod 7 and the hole wall through the correspondence between the rotational speed and the lowering speed. When abnormal resistance is detected, a deceleration command is automatically issued. During the process of lowering the measuring rod 7 to the bottom of the pile, the laser emitter 8 continues to work. Its integrated CM image sensor collects the diffuse reflection image of the laser beam on the surface of the sediment. The machine learning algorithm analyzes the morphological characteristics of the light spot and predicts the density distribution of the sediment.
[0029] When the bottom of the measuring rod 7 contacts the surface of the sediment, the displacement sensing module starts a high-frequency sampling mode to record the resistance curve of the measuring rod 7 penetrating the sediment. The central processing unit filters out equipment vibration noise through wavelet transform algorithm and accurately identifies the point of change in resistance value. After the measurement is completed, the system automatically generates a comprehensive test report including sediment thickness distribution cloud map, penetration resistance to depth curve and laser reflection intensity spectrum, and timestamps the data through blockchain technology.
[0030] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A device for detecting the thickness of sediment at the bottom of bridge pile foundations, characterized in that: The device includes a positioning disk (1), on which bubble level (2) is fixedly installed around the top of the positioning disk (1), on which electric telescopic legs (4) are fixedly installed around the bottom of the positioning disk (1), and ball head (5) is fixedly connected to the extended end of the electric telescopic legs (4). A connecting sleeve (6) is fitted on the surface of the ball head (5), and a base plate (3) is fixedly connected to the bottom of the connecting sleeve (6). A sponge ring (12) is fixedly connected to the center of the top of the positioning disk (1), and a measuring rod (7) is slidably connected to the inner wall of the positioning disk (1). A laser emitter (8) is fixedly installed around the bottom of the positioning disk (1).
2. The bridge pile foundation sediment thickness detection device according to claim 1, characterized in that: The electric telescopic leg (4) and the bubble level (2) are located on the same axis. Oil boxes (9) are fixedly connected to the top of the positioning disk (1) around the perimeter. A rotating shaft (10) is rotatably connected to the inner wall of the oil box (9). An oil wheel (11) is fixedly connected to the surface of the rotating shaft (10). There are four oil wheels (11), which are arranged in a ring array. The surface of the oil wheel (11) is in contact with the surface of the measuring rod (7). The inner wall of the sponge ring (12) is in sliding contact with the surface of the measuring rod (7).
3. The bridge pile foundation sediment thickness detection device according to claim 1, characterized in that: The bubble level (2) integrates a level sensing module, which is used to collect the tilt angle data of the positioning disk (1). The positioning disk (1) is equipped with a support leg control module, which is communicatively connected to the level sensing module. The laser emitter (8) integrates a laser reference module. The measuring rod (7) is equipped with a displacement sensing module. The positioning disk (1) integrates a central processing unit, which is signal-connected to the level sensing module, the support leg control module, the laser reference module, and the displacement sensing module.
4. The bridge pile foundation sediment thickness detection device according to claim 3, characterized in that: The outrigger control module is used to receive data from the horizontal sensing module and drive multiple independently extendable outriggers to perform adjustment actions.
5. The bridge pile foundation sediment thickness detection device according to claim 3, characterized in that: The laser reference module is used to emit a laser beam parallel to the theoretical measurement axis and project the laser beam onto the bottom of the pile for imaging. The displacement sensing module is used to detect and record the displacement of the measuring rod (7) relative to the positioning disk (1).
6. The bridge pile foundation sediment thickness detection device according to claim 3, characterized in that: The central processing unit is used to control the horizontal sensing module, the outrigger control module, the laser reference module and the displacement sensing module, and to receive data from the displacement sensing module to calculate and output the sediment thickness value.
7. The bridge pile foundation sediment thickness detection device according to claim 3, characterized in that: The displacement sensing module is a capacitive displacement sensor.
8. The bridge pile foundation sediment thickness detection device according to claim 3, characterized in that: The output of the central processing unit is also connected to a prompting module, which sends a prompting signal indicating successful leveling when the positioning disk (1) reaches a horizontal state.