Detection device for soil layer settlement in bridge and tunnel engineering construction

Abstract

The utility model discloses a detection device for soil layer settlement in bridge and tunnel engineering construction, and belongs to the technical field of settlement detection devices. Comprising a support, a detection seat plate, an angle adjusting disc, a fixed disc, a detection module, an embedded disc seat, a settlement monitoring unit and a controller, and the detection seat plate is embedded and fixed at the top of the support; the angle adjusting disc is pressed at one end of the top surface of the detection seat plate, a plurality of sections of arc-shaped angle adjusting holes are formed in the angle adjusting disc, and first bolts are movably inserted into the arc-shaped angle adjusting holes; the first bolt movably penetrates through the bottom of the detection seat plate and is screwed with a limiting nut; a laser ranging clamp is fixed to the top of the angle adjusting disc. According to the detection device for bridge and tunnel engineering construction soil layer settlement, two coordinate systems can be established between a construction soil layer settlement monitoring point and detection equipment, and therefore settlement data can be accurately monitored, and the settlement direction can be synchronously detected.

Description

Technical Field

[0001] This utility model specifically relates to a soil settlement detection device for bridge and tunnel construction, belonging to the technical field of settlement detection devices. Background Technology

[0002] Soil settlement seriously affects the quality and safety of engineering projects, potentially causing bridge pier displacement, tunnel lining cracking, and other defects, threatening structural stability and durability, and even leading to safety accidents and huge losses. Therefore, detection devices are needed to monitor soil settlement. For example, Chinese Patent Publication No. CN217203968U discloses a soil settlement detection device for bridge and tunnel construction. This structure allows an outwardly expanding strip to extend from the detection tube and deeply insert into the soil around the tube via a reverse rotation knob, greatly increasing the contact area between the device and the soil. This enables the device to settle precisely in sync with the soil, significantly improving the accuracy of settlement detection. Another example is Chinese Patent Publication No. CN120083182A, which discloses a soil settlement detection device for bridge and tunnel construction. The device's structure uses a guide mechanism to ensure the sleeve rod is vertical and fits snugly against the inner wall of the detection hole, preventing wobbling and enabling the measurement of settlement in non-detected soil layers. It also assists the outer measuring rod in entering vertically, improving detection accuracy and efficiency. A second guide mechanism, through the cooperation of a copper sleeve and a permanent magnet, ensures the outer measuring rod is vertical and stable, allowing the inner measuring rod to accurately capture rapid settlement. A locking mechanism monitors settlement, triggering an alarm and locking the outer measuring rod when a threshold is exceeded, connecting the inner and outer measuring rods to ensure safety and measurement accuracy. However, existing detection devices are all installed at the engineering soil layer, with the device and the soil layer in the same coordinate system. When soil settlement occurs, the entire detection device settles synchronously, but the detection head does not shift, leading to significant errors between the actual settlement and the detection data. Furthermore, the detection device can only detect vertical settlement and cannot detect inclined settlement. Utility Model Content

[0003] To address the aforementioned issues, this utility model proposes a soil settlement detection device for bridge and tunnel construction. This device establishes two coordinate systems between the soil settlement monitoring point and the detection equipment, thereby enabling accurate monitoring of settlement data and simultaneous detection of settlement direction.

[0004] This utility model discloses a soil settlement detection device for bridge and tunnel construction, comprising:

[0005] Support,

[0006] A detection base plate, which is fitted and fixed to the top of the support;

[0007] An angle adjustment plate is pressed against one end of the top surface of the detection base plate. The angle adjustment plate has multiple arc-shaped angle adjustment holes, and a first bolt is movably inserted into each arc-shaped angle adjustment hole. The first bolt movably passes through the bottom of the detection base plate and is screwed with a limit nut. A laser rangefinder is fixed to the top of the angle adjustment plate.

[0008] A fixed plate is pressed against the other end of the top surface of the detection base plate, and a second bolt passes through the fixed plate; the second bolt passes through the arc-shaped hole of the detection base plate and is screwed with a limit nut; a laser emitting fixture is fixed on the top of the fixed plate;

[0009] The detection module includes a laser ranging unit clamped and fixed inside a laser ranging fixture; and a laser emitting unit clamped and fixed inside a laser emitting fixture.

[0010] The embedded plate base has two sets, and one end of each embedded plate base is fixed with multiple embedded bolts. The outer surface of each embedded plate base is integrally formed with a threaded ring. The center distance between the laser ranging unit and the laser emitting unit is the same as the center distance between the two embedded plate bases.

[0011] The settlement monitoring unit includes a test seat that is screwed onto a pre-embedded plate seat, the test seat having a conical hole at its center; and a detection seat that is screwed onto another pre-embedded plate seat, the detection seat having a laser target surface fitted and fixed at its center.

[0012] The controller connects the detection module and the laser target surface.

[0013] During operation, the on-site construction and installation of the detection device are completed first. Then, the detection module and settlement monitoring unit are calibrated, enabling the monitoring of soil settlement. During monitoring, the laser emitting unit and laser target are in a silent state. The laser ranging unit measures distance according to a set time threshold, such as every 30 seconds, and sends the measurement results to the controller. The controller judges the measurement results; when the set distance alarm value is reached, the laser emitting unit and laser target are triggered, or when the difference between multiple consecutive distance measurements exceeds the difference alarm value. Through the cooperation of the laser ranging unit and the conical hole, comprehensive monitoring of soil settlement can be achieved, regardless of the direction of soil settlement. The contact position between the laser ranging unit and the wall of the conical hole is changed, thereby immediately activating the laser emitting unit and the laser target surface. The process of the laser emitting unit and the laser target surface is as follows: The controller sends a signal to the laser emitting unit, which emits a laser towards the laser target surface. The laser target surface integrates a receiving matrix of highly sensitive photoelectric sensors and infrared receivers. The laser landing point can be accurately captured by three adjacent photoelectric sensors. The laser target surface transmits the detected laser signal to the controller wirelessly. The controller calculates the coordinates of the laser point and the original coordinates of the laser point, thereby obtaining the direction and amount of laser point offset. This allows for the determination of the settlement direction and amount, enabling precise monitoring of the initial and secondary settlement of the construction soil layer.

[0014] Furthermore, the pre-embedded bolts of the pre-embedded plate are cast on the end face of the bridge and tunnel structure. During the construction of the bridge and tunnel structure, the pre-embedded plate is directly cast onto the end face of the bridge and tunnel structure. After it has solidified, the outer protective sleeve of the pre-embedded plate is removed, and the settlement monitoring unit is screwed onto the pre-embedded plate.

[0015] Furthermore, the pre-embedded bolts of the pre-embedded plate are cast on a concrete column, which is cast on the soil layer of the bridge and tunnel construction project. When the pre-embedded plate construction cannot be carried out in the bridge and tunnel construction project, a separate concrete column is built, and the concrete column is used as a reference system for monitoring the settlement of the construction soil layer.

[0016] Furthermore, the support is fixed at a location far from the bridge and tunnel project, and the distance between the support and the pre-embedded plate is within the range of the detection module's distance measurement; the distance measurement is used to make the detection module move away from the settlement range of the construction soil settlement monitoring point.

[0017] Furthermore, a laser emission correction unit is also fixed on the detection base plate; the laser emission correction unit and the laser emission unit face opposite directions, and a correction laser target is set directly opposite within the emission range of the laser emission unit; the laser emission correction unit and the correction laser target are connected to the controller.

[0018] When the potential settlement range is large (greater than the straight-line distance between the laser emission correction unit and the laser target), the monitored data is corrected by arranging the laser emission correction unit and the correction laser target. At this time, since the correction laser target remains unchanged, when the detection quantity of the laser emission unit fluctuates due to the impact of settlement, the data of the correction laser target and the laser target surface will have errors. In this case, the data detected by the correction laser target is used as the settlement data.

[0019] Furthermore, the support includes a threaded pipe section pre-embedded in the soil layer by concrete, a pipe seat is poured on the top of the threaded pipe section, a stud is inserted into the pipe seat, and the stud is screwed to the threaded pipe section; a locking bolt is screwed onto the pipe seat and tightened against the stud; a prism is integrally formed on the top of the stud; the prism is movably embedded out of the detection seat plate; a locking post is integrally formed on the bottom of the detection seat plate and fits into the prism; a central bolt is screwed onto the top of the prism and tightened against the top surface of the detection seat plate.

[0020] During construction, based on the pre-embedded position of the embedded plate and the detection distance of the detection module, the opening position is first determined, followed by drilling. After drilling, the threaded pipe section and pipe seat are poured with concrete to the drilling position. Then, the stud is screwed to the threaded pipe section, and the detection plate is fitted onto the prism. Next, the detection plate is fixed to the prism with the center bolt. Then, the settlement monitoring unit is installed on the detection plate. Next, the stud is rotated to make the centerline of the settlement monitoring unit and the centerline of the embedded plate equal (a laser pointer can be used for marking). Then, the angle adjustment plate and the fixing plate are rotated to make the center point of the settlement monitoring unit coincide with the center point of the embedded plate, thus completing the installation of the detection device.

[0021] Furthermore, the controller is connected to a field digital display and an alarm module; the controller can display the collected settlement data in real time, and when the settlement data exceeds the warning value, the alarm module will activate the alarm action.

[0022] Furthermore, the controller is communicatively connected to the remote monitoring module, and the controller can intermittently send monitoring data to the remote monitoring module. The remote monitoring module can determine whether the settlement warning value (including settlement depth and settlement tilt) has been exceeded based on the monitoring data.

[0023] Compared with existing technologies, the soil settlement detection device for bridge and tunnel construction of this utility model utilizes laser long-distance ranging and laser target coordination to achieve long-distance monitoring of soil settlement monitoring points. When settlement occurs at the monitoring point, the position of the settlement monitoring unit remains unchanged, thus enabling rapid capture of settlement data. When the monitoring unit is subject to settlement interference, the monitoring data can be corrected by maintaining the position of the laser target, thereby ensuring detection accuracy. During detection, the settlement path can be accurately captured through the laser target surface. Furthermore, to further improve the accuracy of directional capture, two sets of detection devices can be set up, with the detection directions of the two settlement devices perpendicular to each other, achieving three-dimensional detection of the settlement direction at the soil settlement monitoring point. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the soil settlement detection device for bridge and tunnel construction according to this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of the soil settlement detection device for bridge and tunnel construction without the installation of the center bolt.

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the test seat of this utility model.

[0027] Figure 4 This is a schematic diagram of the structure of the soil settlement detection device and soil installation embodiment 1 for bridge and tunnel engineering construction according to this utility model.

[0028] Figure 5 This is a schematic diagram of the structure of the soil settlement detection device and soil installation embodiment 2 for bridge and tunnel engineering construction according to this utility model.

[0029] Reference numerals: 1. Detection base plate, 2. Angle adjustment plate, 3. Arc-shaped angle adjustment hole, 4. First bolt, 5. Laser rangefinder fixture, 6. Fixing plate, 7. Second bolt, 8. Laser emission fixture, 9. Laser rangefinder unit, 10. Laser emission unit, 11. Embedded plate base, 12. Embedded bolt, 13. Test base, 14. Conical hole, 15. Detection base, 16. Laser target surface, 17. Controller, 18. Threaded pipe section, 19. Pipe base, 20. Stud, 21. Locking bolt, 22. Prism, 23. Clamping post, 24. Center bolt, 25. Laser emission correction unit, 26. Correction laser target. Detailed Implementation

[0030] Example 1:

[0031] like Figures 1 to 4 The soil settlement detection device shown in the diagram for bridge and tunnel construction includes:

[0032] Support,

[0033] Detection base plate 1, which is fitted and fixed to the top of the support;

[0034] Angle adjustment plate 2 is pressed against one end of the top surface of the detection base plate 1. The angle adjustment plate 2 has multiple arc-shaped angle adjustment holes 3. A first bolt 4 is movably inserted into the arc-shaped angle adjustment holes 3. The first bolt 4 movably passes through the bottom of the detection base plate 1 and is screwed with a limit nut. A laser rangefinder 5 is fixed on the top of the angle adjustment plate 2.

[0035] A fixed plate 6 is pressed against the other end of the top surface of the detection base plate 1, and a second bolt 7 passes through the fixed plate 6; the second bolt 7 passes through the arc-shaped hole of the detection base plate 1 and is screwed with a limit nut; a laser emitting fixture 8 is fixed on the top of the fixed plate 6;

[0036] The detection module includes a laser ranging unit 9 clamped and fixed inside the laser ranging fixture 5; and a laser emitting unit 10 clamped and fixed inside the laser emitting fixture 8.

[0037] The embedded plate seat 11 is provided in two. One end of the embedded plate seat 11 is fixed with a plurality of embedded bolts 12. The embedded plate seat 11 is integrally formed with a threaded ring on the outside. The intermediate distance between the laser ranging unit 9 and the laser emitting unit 10 is the same as the center distance between the two embedded plate seats 11.

[0038] The settlement monitoring unit includes a test seat 13 screwed to a pre-embedded plate seat 11, the test seat 13 having a conical hole 14 at its center; and a detection seat 15 screwed to another pre-embedded plate seat 11, the detection seat 15 having a laser target surface 16 fitted and fixed at its center.

[0039] The controller 17 is connected to the detection module and the laser target surface 16.

[0040] During operation, the on-site construction and installation of the detection device are completed first. Then, the detection module and settlement monitoring unit are calibrated, enabling the monitoring of soil settlement. During monitoring, the laser emitting unit 10 and laser target 16 are in a silent state. The laser ranging unit 9 measures distance according to a set time threshold, such as measuring distance every 30 seconds, and sends the measurement results to the controller 17. The controller 17 judges the measurement results. When the set distance alarm value is reached, the laser emitting unit 10 and laser target 16 are triggered, or when the difference between multiple consecutive distance values ​​exceeds the difference alarm value, the laser emitting unit 10 and laser target 16 are triggered. Through the cooperation of the laser ranging unit 9 and the conical hole 14, all-round monitoring of soil settlement can be achieved. Regardless of the direction of soil settlement, the laser rangefinder can be adjusted. The contact position between the ranging unit 9 and the wall of the conical hole 14 immediately triggers the operation of the laser emitting unit 10 and the laser target surface 16. The process of the laser emitting unit 10 and the laser target surface 16 is as follows: The controller 17 sends a signal to the laser emitting unit 10, and the laser emitting unit 10 emits a laser towards the laser target surface 16. The laser target surface 16 integrates a receiving matrix of a high-sensitivity photoelectric sensor and an infrared receiver. The laser landing point can be accurately captured by the three adjacent photoelectric sensors. The laser target surface 16 transmits the detected laser signal wirelessly to the controller 17. The controller 17 calculates the coordinates of the laser point and the original coordinates of the laser point, thereby obtaining the direction and amount of laser point offset. This allows for the determination of the settlement direction and amount, enabling precise monitoring of the initial and secondary settlement of the construction soil layer.

[0041] The pre-embedded bolts 12 of the pre-embedded plate seat 11 are cast on the end face of the bridge and tunnel structure. During the construction of the bridge and tunnel structure, the pre-embedded plate seat 11 is directly cast onto the end face of the bridge and tunnel structure. After it has solidified, the outer protective sleeve of the pre-embedded plate seat 11 is removed, and the settlement monitoring unit is screwed onto the pre-embedded plate seat 11.

[0042] The pre-embedded bolts 12 of the pre-embedded plate seat 11 are cast on the concrete column, and the concrete column is cast on the soil layer of the bridge and tunnel construction project. When the pre-embedded plate seat 11 cannot be constructed in the bridge and tunnel construction project, a separate concrete column is built and the concrete column is used as a reference system for monitoring the settlement of the construction soil layer.

[0043] The support is fixed away from the bridge and tunnel project, and the distance between the support and the pre-embedded plate 11 is within the range of the detection module's distance measurement; the distance measurement is used to make the detection module move away from the settlement range of the construction soil settlement monitoring point.

[0044] The support includes a threaded pipe section 18 embedded in the soil layer by concrete. A pipe seat 19 is cast in concrete at the top of the threaded pipe section 18. A stud 20 is inserted into the pipe seat 19 and screwed onto the threaded pipe section 18. A locking bolt 21 is screwed onto the pipe seat 19 and tightened against the stud 20. A prism 22 is integrally formed at the top of the stud 20. The prism 22 is movably embedded out of the detection seat plate 1. A locking post 23 is integrally formed at the bottom of the detection seat plate 1 and fits into the prism 22. A central bolt 24 is screwed onto the top of the prism 22 and tightened against the top surface of the detection seat plate 1.

[0045] During construction, based on the pre-embedded position of the pre-embedded plate seat 11 and the detection distance of the detection module, the opening position is first determined, and then drilling is carried out. After drilling is completed, the threaded pipe section 18 and the pipe seat 19 are poured into the drilling position with concrete. Then, the stud 20 is screwed to the threaded pipe section 18, and the detection seat plate 1 is fitted onto the prism 22. Then, the detection seat plate 1 and the prism 22 are fixed with the center bolt 24. Then, the settlement monitoring unit is installed on the detection seat plate 1. Then, the stud 20 is rotated to make the center line of the settlement monitoring unit and the center line of the pre-embedded plate seat 11 be set at the same height (a laser pen can be used to mark this). Then, the angle adjustment plate 2 and the fixing plate 6 are rotated to make the center point of the settlement monitoring unit coincide with the center point of the pre-embedded plate seat 11, thus completing the layout and installation of the detection device.

[0046] The controller 17 is connected to a field digital display and an alarm module; the controller 17 can display the collected settlement data in real time, and when the settlement data exceeds the warning value, the alarm module will activate the alarm action.

[0047] The controller 17 is communicatively connected to the remote monitoring module. The controller 17 can intermittently send monitoring data to the remote monitoring module. The remote monitoring module can determine whether the settlement warning value (including settlement depth and settlement tilt) is exceeded based on the monitoring data.

[0048] Example 2:

[0049] like Figure 5 The bridge and tunnel engineering construction soil settlement detection device shown has a laser emission correction unit 25 fixed on the detection base plate 1; the laser emission correction unit 25 and the laser emission unit 10 face opposite directions, and a correction laser target 26 is set directly opposite within the emission range of the laser emission unit 10; the laser emission correction unit 25 and the correction laser target 26 are connected to the controller 17.

[0050] When the potential settlement range is large (greater than the straight-line distance between the laser emission correction unit 25 and the laser target surface 16), the monitored data is corrected by arranging the laser emission correction unit 25 and the correction laser target 26. At this time, since the correction laser target 26 remains unchanged, when the detection quantity of the laser emission unit 10 fluctuates due to the impact of settlement, the data of the correction laser target 26 and the laser target surface 16 will have errors. In this case, the data detected by the correction laser target 26 is used as the settlement data.

[0051] The above embodiments are merely preferred embodiments of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model are included within the scope of the present utility model.

Claims

1. A device for detecting soil settlement during bridge and tunnel construction, characterized in that: include: Support, A detection base plate, which is fitted and fixed to the top of the support; An angle adjustment plate is pressed against one end of the top surface of the detection base plate. The angle adjustment plate has multiple arc-shaped angle adjustment holes, and a first bolt is movably inserted into each arc-shaped angle adjustment hole. The first bolt movably passes through the bottom of the detection base plate and is screwed with a limit nut. A laser rangefinder is fixed to the top of the angle adjustment plate. A fixed plate is pressed against the other end of the top surface of the detection base plate, and a second bolt passes through the fixed plate; the second bolt passes through the arc-shaped hole of the detection base plate and is screwed with a limit nut; a laser emitting fixture is fixed on the top of the fixed plate; The detection module includes a laser ranging unit clamped and fixed inside a laser ranging fixture; and a laser emitting unit clamped and fixed inside a laser emitting fixture. The embedded plate base has two sets, and one end of each embedded plate base is fixed with multiple embedded bolts. The outer surface of each embedded plate base is integrally formed with a threaded ring. The center distance between the laser ranging unit and the laser emitting unit is the same as the center distance between the two embedded plate bases. The settlement monitoring unit includes a test seat that is screwed onto a pre-embedded plate seat, the test seat having a conical hole at its center; and a detection seat that is screwed onto another pre-embedded plate seat, the detection seat having a laser target surface fitted and fixed at its center. The controller connects the detection module and the laser target surface.

2. The soil settlement detection device for bridge and tunnel construction according to claim 1, characterized in that: The pre-embedded bolts of the pre-embedded plate are cast on the end face of the bridge and tunnel structure.

3. The soil settlement detection device for bridge and tunnel construction according to claim 1, characterized in that: The pre-embedded bolts of the pre-embedded plate are cast on the concrete column, and the concrete column is cast on the soil layer of the bridge and tunnel construction project.

4. The soil settlement detection device for bridge and tunnel construction according to claim 1, characterized in that: The support is fixed at a location far from the bridge and tunnel project, and the distance between the support and the pre-embedded plate is within the range of the detection module's distance measurement.

5. The soil settlement detection device for bridge and tunnel construction according to claim 1, characterized in that: A laser emission correction unit is also fixed on the detection base plate; the laser emission correction unit and the laser emission unit face opposite directions, and a correction laser target is set directly opposite within the emission range of the laser emission unit; the laser emission correction unit and the correction laser target are connected to the controller.

6. The soil settlement detection device for bridge and tunnel construction according to claim 1, characterized in that: The support includes a threaded pipe section embedded in the soil layer by concrete. A pipe seat is poured into the top of the threaded pipe section, and a stud is inserted into the pipe seat. The stud is screwed onto the threaded pipe section. A locking bolt is screwed onto the pipe seat and tightened against the stud. A prism is integrally formed on the top of the stud. The prism is movably embedded out of the detection seat plate. A locking post is integrally formed on the bottom of the detection seat plate and fits into the prism. A central bolt is screwed onto the top of the prism and tightened against the top surface of the detection seat plate.

7. The soil settlement detection device for bridge and tunnel construction according to claim 1, characterized in that: The controller is connected to a field digital display and an alarm module.

8. The soil settlement detection device for bridge and tunnel construction according to claim 1, characterized in that: The controller is communicatively connected to the remote monitoring module.

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