A device for monitoring the horizontal and vertical displacement of a pipe jacking well
By installing a combined monitoring device consisting of a laser rangefinder, a MEMS tilt sensor, and a fiber optic grating sensor inside the pipe jacking shaft, the problems of cumbersome monitoring operations and the inability to remove the device during pipe jacking construction have been solved. This has enabled efficient and accurate displacement monitoring and early warning, reduced costs, and improved data acquisition efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE FOURTH OF CHINA CONSTR SEVENTH ENG
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-31
AI Technical Summary
In the existing technology, the monitoring operation during the construction of pipe jacking wells is cumbersome and cannot be dismantled, which increases costs. In addition, traditional monitoring methods cannot achieve continuous real-time monitoring and have problems such as human error and low data acquisition efficiency.
The monitoring component, consisting of a laser rangefinder, MEMS tilt sensor, and fiber optic grating sensor, is installed on the inner wall of the pipe jacking well. It is connected to the visual early warning component through a controller to achieve real-time monitoring and early warning. It can be removed after monitoring is completed. Combined with a solar and battery power supply system, it reduces operation and maintenance costs.
It has achieved precise monitoring of the horizontal and vertical displacement of the pipe jacking well, improving the accuracy by more than 40%. It can provide real-time early warning and push information to the cloud, forming a closed-loop control, reducing costs and improving monitoring efficiency and accuracy.
Smart Images
Figure CN224580871U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, specifically a device for monitoring the horizontal and vertical displacement of a pipe jacking well. Background Technology
[0002] With the rapid development of urbanization in China, the drainage systems of municipal roads are gradually being improved, and pipe diameters and burial depths are increasing. During the construction of pipe jacking wells, the well structure is subjected to complex loads such as earth pressure, jacking force, and groundwater seepage, making it prone to horizontal displacement or vertical settlement. If deformation is not monitored and controlled in a timely manner, it may lead to well instability, damage to surrounding structures, or even safety accidents.
[0003] The monitoring methods commonly used in engineering currently have the following drawbacks: 1. Traditional methods (such as total stations and levels) require manual periodic measurements, which cannot achieve continuous real-time monitoring. Data collection efficiency is low at night or in harsh environments, and there is a risk of human error. 2. At present, the monitoring devices are all pre-embedded in the pipe jacking shaft. After the monitoring is completed, the monitoring devices pre-embedded in the pipe jacking shaft cannot be removed, resulting in waste of the devices and increased costs. Utility Model Content
[0004] The purpose of this invention is to provide a monitoring device for the horizontal and vertical displacement of a jacking well, which aims to solve the problems of cumbersome monitoring operations and the inability to dismantle existing devices, thus increasing costs.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a monitoring device for horizontal and vertical displacement of a pipe jacking well includes a monitoring component installed on the inner wall of the pipe jacking well. The monitoring component is connected to a controller, and the controller is connected to a visual early warning component, so that when the monitoring component detects an abnormality in the pipe jacking well, the controller can control the visual early warning component to issue an early warning.
[0006] The monitoring components include a laser rangefinder, a MEMS tilt sensor, and a fiber optic grating sensor, all of which are mounted on the inner wall of the jacking well via mounting components.
[0007] The installation assembly includes a first mounting component and a second mounting component. Both the first and second mounting components are installed on the inner wall of the jacking well. The laser rangefinder is installed on the first mounting component, and the MEMS tilt sensor and fiber optic grating sensor are installed on the second mounting component, so that the laser rangefinder, MEMS tilt sensor and fiber optic grating sensor can be removed after monitoring.
[0008] The first mounting component consists of four parts, arranged in a rectangular array at intervals at the four corners of the jacking shaft, with the four first mounting components on the same horizontal plane;
[0009] The second mounting component consists of several units, which are spaced vertically at the centerline of each face of the jacking well.
[0010] Preferably, the first mounting component 401 includes a first embedded pipe 4011 and a first hole 4012 formed in the first embedded pipe 4011;
[0011] The laser rangefinder 301 is installed in the first hole 4012 on the first pre-embedded pipe 4011.
[0012] Preferably, the second mounting component includes a second embedded pipe and second holes formed on the second embedded pipe in a quincunx pattern;
[0013] Both the MEMS tilt sensor and the fiber optic grating sensor are installed in the second hole on the second pre-embedded pipe.
[0014] Preferably, the laser rangefinder extends through the first hole, and the portion of the laser rangefinder extending through the hole is sealed to the jacking well by a first concrete block.
[0015] Preferably, the MEMS tilt sensor and the fiber optic grating sensor protrude through the second hole, and the portions of the MEMS tilt sensor and the fiber optic grating sensor protruding through the second hole are sealed with the jacking well by a second concrete block.
[0016] Preferably, the visual early warning component includes an alarm, which is connected to a controller to provide on-site alarms and push information to a cloud management platform.
[0017] Preferably, the visual warning component further includes a display screen, which is connected to a controller. The controller is also connected to a laser rangefinder, a MEMS tilt sensor, and a fiber optic grating sensor, so that the data monitored by the laser rangefinder, the MEMS tilt sensor, and the fiber optic grating sensor can be displayed on the display screen in real time.
[0018] Preferably, a solar panel is provided above the jacking well, and the solar panel is connected to a battery. The battery is electrically connected to a laser rangefinder, a MEMS tilt sensor, a fiber optic grating sensor, an alarm, and a display screen.
[0019] The beneficial effects are: 1. By fusing multi-source data from laser rangefinders, MEMS tilt sensors and fiber optic grating sensors, the accuracy is improved by more than 40% compared to single sensor solutions. It can simultaneously acquire wellbore horizontal offset, tilt angle, settlement and local strain, and comprehensively assess the structural safety status.
[0020] 2. When in use, the laser rangefinder, MEMS tilt sensor, and fiber Bragg grating sensor can be inserted into the first and second mounting components. After use, they can be removed from the first and second mounting components for subsequent use, thus saving costs. Moreover, the laser rangefinder, MEMS tilt sensor, and fiber Bragg grating sensor do not require drilling or complex wiring during installation, significantly shortening deployment time compared to traditional solutions. The solar and battery power supply system can operate continuously for more than 15 days, reducing maintenance costs. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the monitoring component of this utility model installed on a pipe jacking well;
[0022] Figure 2 This is a schematic diagram of the structure of the jacking well of this utility model;
[0023] Figure 3 This utility model Figure 1 A magnified structural diagram at point A;
[0024] Figure 4 This is a schematic diagram of the top partial cross-section of the jacking well of this utility model;
[0025] Figure 5 This utility model Figure 4 A magnified structural diagram at point B.
[0026] In the figure: 1. Pipe jacking well; 301. Laser rangefinder; 302. MEMS tilt sensor; 303. Fiber optic grating sensor; 401. First mounting component; 4011. First embedded pipe; 4012. First hole; 402. Second mounting component; 4021. Second embedded pipe; 4022. Second hole; 6. Reserved hole. Detailed Implementation
[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0028] like Figures 1-5As shown, a horizontal and vertical displacement monitoring device for a pipe jacking well is mainly used to synchronously collect data through a laser rangefinder 301, a MEMS tilt sensor 302, and a fiber optic grating sensor 303. If the displacement exceeds a threshold or the trend prediction is abnormal, an on-site alarm is triggered and information is pushed to the cloud management platform. Based on historical data, construction parameters (such as jacking speed and grouting pressure) are optimized to form a monitoring-adjustment closed-loop control. By setting up the laser rangefinder 301, MEMS tilt sensor 302, and fiber optic grating sensor 303, the accuracy is improved by more than 40% compared to a single sensor solution. It can simultaneously acquire the horizontal displacement, tilt angle, settlement, and local strain of the well body to comprehensively assess the structural safety status.
[0029] In this embodiment, the monitoring device includes a monitoring component installed on the inner wall of the jacking well 1. The monitoring component is connected to a controller, and the controller is connected to a visual early warning component. When the monitoring component detects an abnormality in the jacking well 1, the controller can control the visual early warning component to issue an early warning and display it so that the next step can be taken.
[0030] In this embodiment, a permeable reserved hole 6 is provided on the jacking well 1 to facilitate the installation of the pipeline.
[0031] like Figure 1 and Figure 4 As shown, the monitoring component is installed on the jacking well 1 via the mounting component in order to monitor the jacking well 1.
[0032] Specifically, the monitoring components include a laser rangefinder 301, a MEMS tilt sensor 302, and a fiber Bragg grating sensor 303. All three are mounted on the inner wall of the jacking well 1 using mounting components. In this embodiment, horizontal displacement monitoring is performed as follows: Laser rangefinder 301: Four laser rangefinders 301 (accuracy ±0.1cm) are deployed at the four corners of the jacking well 1. Horizontal displacement is calculated by measuring the change in distance between adjacent measuring points, forming a closed-loop detection network. MEMS tilt sensor 302: A MEMS tilt sensor 302 with temperature compensation is used to monitor the tilt angle of the well body in real time, assisting in correcting the laser rangefinder data. Vertical displacement monitoring: Fiber Bragg grating sensor 303: A fiber Bragg grating sensor 303 is installed within the structure of the jacking well 1. The strain distribution is inverted by detecting the wavelength shift of the grating, and the overall vertical displacement is indirectly calculated. The installation components include a first mounting component 401 and a second mounting component 402. Both the first mounting component 401 and the second mounting component 402 are installed on the inner wall of the jacking well 1. A laser rangefinder 301 is installed on the first mounting component 401, and a MEMS tilt sensor 302 and a fiber optic grating sensor 303 are installed on the second mounting component 402, so that the laser rangefinder 301, MEMS tilt sensor 302 and fiber optic grating sensor 303 can be removed after monitoring. There are four first mounting components 401, which are arranged in a rectangular array at intervals at the four corners of the jacking well 1, and the four first mounting components 401 are on the same horizontal plane. There are several second mounting components 402, which are arranged vertically at intervals at the central axis of each face of the jacking well 1, so as to better monitor.
[0033] In this embodiment, the structure and principle of the laser rangefinder 301, MEMS tilt sensor 302 and fiber optic grating sensor 303 are all existing technologies and will not be described in detail here.
[0034] like Figure 4 and Figure 5 As shown, the laser rangefinder 301 is installed on the jacking well 1 via the first mounting component 401 to monitor the horizontal displacement of the jacking well 1.
[0035] Specifically, the first mounting component 401 includes a first embedded pipe 4011 and a first hole 4012 opened on the first embedded pipe 4011; the laser rangefinder 301 is installed in the first hole 4012 on the first embedded pipe 4011, and calculates the horizontal displacement by measuring the change in the distance between adjacent measuring points to form a closed loop detection network.
[0036] A laser rangefinder 301 is installed through the first hole 4012, and the part of the laser rangefinder 301 that is installed through the jacking well 1 is sealed by the first concrete block.
[0037] In this embodiment, during construction, a first pre-embedded pipe 4011 is pre-embedded at each of the four corners on the same horizontal plane. The first pre-embedded pipe 4011 is made of PVC pipe, and 2mm holes are made around the PVC pipe with nails, with a longitudinal spacing of 100mm and a circumferential spacing of 10mm, arranged in a staggered pattern. After the jacking shaft 1 is constructed, a laser rangefinder 301 is inserted into the PVC pipe to a depth of 200-300mm, and the port is sealed with a precast concrete block, which can be removed later.
[0038] like Figure 1 and Figure 3 As shown, the MEMS tilt sensor 302 and the fiber optic grating sensor 303 are mounted on the jacking well 1 through the second mounting component 402, so as to not only assist in correcting the laser ranging data, but also indirectly calculate the overall vertical displacement by detecting the grating wavelength offset to invert the strain distribution.
[0039] Specifically, the second mounting component 402 includes a second pre-embedded pipe 4021 and second holes 4022 opened on the second pre-embedded pipe 4021 and distributed in a quincunx pattern; the MEMS tilt sensor 302 and the fiber optic grating sensor 303 are both installed in the second holes 4022 on the second pre-embedded pipe 4021 to monitor the tilt angle of the well body in real time, assist in correcting the laser ranging data, and indirectly calculate the overall vertical displacement by detecting the grating wavelength offset and inverting the strain distribution.
[0040] The MEMS tilt sensor 302 and the fiber optic grating sensor 303 protrude through the second hole 4022. The portions of the MEMS tilt sensor 302 and the fiber optic grating sensor 303 that protrude through the second hole 4022 are sealed with the jacking well 1 by the second concrete block.
[0041] In this embodiment, during construction, a second pre-embedded pipe 4021 is pre-embedded vertically every two meters at the midpoint of each side. The second pre-embedded pipe 4021 is made of PVC pipe, and 2mm holes are made around the PVC pipe with nails, with a longitudinal spacing of 100mm and a circumferential spacing of 10mm, arranged in a staggered pattern. After the jacking well 1 is completed, a MEMS tilt sensor 302 and a fiber optic grating sensor 303 are inserted into the PVC pipe to a depth of 200-300mm. The ports are sealed with precast concrete blocks, which can be removed later.
[0042] In this embodiment, the visual early warning component includes an alarm, which is connected to the controller to trigger an alarm on-site and push information to the cloud management platform. If the displacement exceeds the threshold or the trend prediction is abnormal, an on-site alarm is triggered and information is pushed to the cloud management platform.
[0043] The visual warning component also includes a display screen, which is connected to a controller. The controller is also connected to a laser rangefinder 301, a MEMS tilt sensor 302, and a fiber optic grating sensor 303, enabling the data monitored by the laser rangefinder 301, MEMS tilt sensor 302, and fiber optic grating sensor 303 to be displayed on the display screen in real time.
[0044] In this embodiment, an audible and visual alarm (≥105dB) and a display screen are configured to display the location and value of displacement exceeding the limit in real time. Data is transmitted wirelessly via 4G / 5G or LoRa. The safety threshold is automatically calculated based on the well design parameters (well diameter, burial depth), and manual adjustment of the warning level is supported.
[0045] In this embodiment, a solar panel is installed above the jacking well 1. The solar panel is connected to a battery. The battery is electrically connected to a laser rangefinder 301, a MEMS tilt sensor 302, a fiber optic grating sensor 303, an alarm, and a display screen. The solar-battery power supply system can work continuously for more than 15 days, reducing operation and maintenance costs.
[0046] Working principle: During construction, a first pre-embedded pipe 4011 is pre-embedded at each of the four corners on the same horizontal plane, and a second pre-embedded pipe 4021 is pre-embedded vertically every two meters at the midpoint of each side. Then, a laser rangefinder 301 is inserted into the first hole 4012, and a MEMS tilt sensor 302 and a fiber optic grating sensor 303 are inserted into the second hole 4022. After that, the hole is sealed with a first concrete block and a second concrete block so that it can be removed later. Before construction, 24 hours of static data are collected to establish the sensor reference value and the three-dimensional coordinate system of the well body. Then, multiple sensors collect data synchronously to achieve the purpose of real-time monitoring. If the displacement exceeds the threshold or the trend prediction is abnormal, an on-site alarm is triggered and information is pushed to the cloud management platform. Based on historical data, construction parameters (such as jacking speed and grouting pressure) are optimized to form a monitoring-adjustment closed-loop control.
[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A device for monitoring horizontal displacement and vertical displacement of a pipe jacking shaft, characterized in that, It includes a monitoring component installed on the inner wall of the jacking well (1), the monitoring component being connected to a controller, and the controller being connected to a visual early warning component, so that when the monitoring component detects an abnormality in the jacking well (1), it can control the visual early warning component to issue an early warning through the controller; The monitoring components include a laser rangefinder (301), a MEMS tilt sensor (302), and a fiber optic grating sensor (303), all of which are mounted on the inner wall of the jacking well (1) via mounting components. The installation assembly includes a first mounting component (401) and a second mounting component (402). Both the first mounting component (401) and the second mounting component (402) are installed on the inner wall of the jacking well (1). The laser rangefinder (301) is installed on the first mounting component (401), and the MEMS tilt sensor (302) and the fiber optic grating sensor (303) are installed on the second mounting component (402). After the laser rangefinder (301), the MEMS tilt sensor (302) and the fiber optic grating sensor (303) have finished monitoring, they can be removed. There are four first mounting components (401), which are arranged in a rectangular array at intervals at the four corners of the jacking well (1), and the four first mounting components (401) are on the same horizontal plane; The second mounting component (402) consists of several units, which are spaced vertically at the center axis of each face of the jacking well (1).
2. The device for monitoring horizontal displacement and vertical displacement of a pipe jacking well according to claim 1, characterized in that, The first mounting component (401) includes a first embedded pipe (4011) and a first hole (4012) opened on the first embedded pipe (4011). The laser rangefinder (301) is installed in the first hole (4012) on the first pre-embedded pipe (4011).
3. The device for monitoring horizontal displacement and vertical displacement of a pipe jacking well according to claim 2, characterized in that, The second mounting component (402) includes a second embedded pipe (4021) and second holes (4022) opened on the second embedded pipe (4021) and distributed in a quincunx pattern. The MEMS tilt sensor (302) and the fiber optic grating sensor (303) are both installed in the second hole (4022) on the second pre-embedded pipe (4021).
4. The device for monitoring horizontal displacement and vertical displacement of a pipe jacking well according to claim 2, characterized in that, The laser rangefinder (301) is installed through the first hole (4012), and the part of the laser rangefinder (301) that is inserted through the jacking well (1) is sealed by the first concrete block.
5. The device for monitoring horizontal displacement and vertical displacement of a pipe jacking well according to claim 3, characterized in that, The MEMS tilt sensor (302) and fiber optic grating sensor (303) protrude through the second hole (4022), and the portions of the MEMS tilt sensor (302) and fiber optic grating sensor (303) protruding through the second hole (4022) are sealed with the jacking well (1) by the second concrete block.
6. The device for monitoring horizontal displacement and vertical displacement of a pipe jacking well according to any one of claims 1-4, characterized in that, The visual early warning component includes an alarm, which is connected to a controller to provide on-site alarms and push information to a cloud management platform.
7. The device for monitoring horizontal displacement and vertical displacement of a pipe jacking shaft according to claim 6, characterized in that, The visual warning component also includes a display screen, which is connected to a controller. The controller is connected to a laser rangefinder (301), a MEMS tilt sensor (302), and a fiber optic grating sensor (303), so that the data monitored by the laser rangefinder (301), the MEMS tilt sensor (302), and the fiber optic grating sensor (303) can be displayed on the display screen in real time.
8. The device for monitoring horizontal and vertical displacement of a jacking well according to claim 7, characterized in that, A solar panel is provided above the jacking well (1), and the solar panel is connected to a battery. The battery is electrically connected to a laser rangefinder (301), a MEMS tilt sensor (302), a fiber optic grating sensor (303), an alarm and a display screen.