Cantilever beam type fault movement monitoring device and system
Through the cantilever beam fault stagger monitoring device, the staggering of the cantilever beam elastic rod and the connecting plate reflects the change of fault displacement, solving the problem of small-angle fault monitoring and achieving efficient fault stagger monitoring effect.
Patent Information
- Application Number
- CN202421931864.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-09
AI Technical Summary
It is difficult for the prior art to effectively monitor the amount and direction of staggered deformation of small-angle faults in underground caves. The traditional method has good monitoring effect on large-angle faults but is not good for small-angle faults.
A cantilever beam type fault stagger monitoring device is adopted, including a cantilever beam type elastic rod and a connecting plate in the accommodation cavity arranged perpendicular to the fault. A piezoresistive strain gauge is arranged on the cantilever beam type elastic rod. The fault stagger is followed by the connecting plate and thin-walled aluminum cylinder, and the piezoresistive strain gauge reflects the displacement changes and transmits it to a reading device outside the hole wall.
It realizes accurate measurement of the staggered deformation and direction of small-angle faults. It has a simple structure, convenient layout, and high monitoring efficiency. It is suitable for small-angle fault monitoring during construction.
Smart Images
Figure CN223064561U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of underground chamber fault monitoring, in particular to a cantilever beam type fault dislocation monitoring device and system. Background Technique
[0002] The statements in this part only mention the background technique related to the utility model, and do not necessarily constitute the prior art.
[0003] When excavating an underground chamber, if a fault is encountered, it is prone to collapse, which is not conducive to construction safety. During construction, a multi-point displacement meter is often used to monitor the fault. Its working principle is as follows: Utilize the fact that the resistance of the strain sensor material changes with the strain degree of the material. When the material is subjected to pressure or strain, the resistance value changes, and then the displacement change is measured. When applying this device in an underground chamber, usually drill a hole 5 - 10 meters deep perpendicular to the cave wall, fix one end of the steel wire rope in the hole, and pull the other end to near the cave wall. The deformation amount of the surrounding rock is reflected by measuring the elongation of the steel wire rope. This method has a good effect on monitoring large-angle faults, but since small-angle faults are mainly shear deformation and the deformation amount is extremely small, the effect of monitoring small-angle faults is poor. Content of the Utility Model
[0004] In order to solve the deficiencies of the prior art, the first aspect of the utility model provides a cantilever beam type fault dislocation monitoring device, aiming to propose a cantilever beam type fault dislocation monitoring device that can monitor the dislocation deformation amount and dislocation direction of small-angle faults.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] A cantilever beam type fault dislocation monitoring device includes a receiving cavity perpendicular to the fault. An elastic cantilever beam and a connecting plate are arranged in the receiving cavity. Both ends of the connecting plate are fixed to the inner wall of the receiving cavity. One end of the elastic cantilever beam is fixed to the side of the receiving cavity close to the cave wall, and the other end is connected to the connecting plate. A plurality of piezoresistive strain gauges are arranged at the end of the elastic cantilever beam connected to the connecting plate. Each piezoresistive strain gauge is connected to a lead wire and then connected to a reading device outside the cave wall.
[0007] As an implementation manner, the receiving cavity adopts a thin-walled aluminum cylinder, and the thin-walled aluminum cylinder is arranged in a drill hole in the cave wall, and the drill hole vertically penetrates into the cave wall.
[0008] As an implementation manner, the gap between the drill hole and the thin-walled aluminum cylinder is bonded by low-pressure grouting.
[0009] As an implementation manner, the aperture of the drill hole is 100 - 110 cm, and the difference between the diameter of the thin-walled aluminum cylinder and the aperture of the drill hole is 1 cm.
[0010] As an implementation manner, each lead wire extends along the length direction of the parallel cantilever beam - type elastic rod to a reading device outside the hole wall for transmitting the deformation amount of the relevant piezoresistive strain gauges.
[0011] As an implementation manner, the length of the cantilever beam - type elastic rod is 3 - 5 m.
[0012] As an implementation manner, both the cantilever beam - type elastic rod and the connecting plate are made of hard rubber material.
[0013] As an implementation manner, a plurality of piezoresistive strain gauges are uniformly arranged along the cross - sectional direction of the cantilever beam - type elastic rod at one end where the cantilever beam - type elastic rod is connected to the connecting plate.
[0014] As an implementation manner, 8 piezoresistive strain gauges are provided, and the corresponding central angle between every two adjacent piezoresistive strain gauges is 45°.
[0015] The second aspect of the present utility model provides a cantilever beam - type fault dislocation monitoring system, aiming to propose a cantilever beam - type fault dislocation monitoring system that can monitor the deformation amount and dislocation direction of small - angle faults.
[0016] In order to achieve the above - mentioned purpose, the present invention adopts the following technical solutions:
[0017] A cantilever beam - type fault dislocation monitoring system includes a cantilever beam - type fault dislocation monitoring device described in the first aspect.
[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0019] 1. When the fault dislocates, the accommodation cavity and the connecting plate in the present utility model follow the fault to produce corresponding dislocations, and the dislocation of the connecting plate can drive the cantilever beam - type elastic rod to produce corresponding deflections. The change in the resistance value of the piezoresistive strain gauges at the corresponding positions on the rod reflects the displacement change value, and is transmitted by the lead wire to the reading device outside the hole wall, so that the dislocation deformation amount and the corresponding dislocation direction generated by the fault can be accurately measured.
[0020] 2. The structure of the present utility model is simple, the layout is convenient, the monitoring efficiency is high, and it can be well applied to the monitoring of small - angle faults during construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The specification drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.
[0022] Figure 1 It is a schematic cross - sectional view of the cantilever beam - type fault dislocation monitoring device provided by the embodiment of the present utility model;
[0023] Figure 2Schematic diagram of the details of the cantilever beam type elastic rod provided by the embodiment of the present utility model;
[0024] Among them, 1. Drilling hole, 2. Thin-walled aluminum cylinder, 3. Low-pressure grouting, 4. Cantilever beam type elastic rod, 5. Connection plate, 6. Piezoresistive strain gauge, 7. Lead wire, 8. Fault. Specific implementation manner
[0025] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.
[0026] It should be noted that the present utility model is a structural solution. For each individual device involved therein, the specific structure for realizing its respective functions already exists in the prior art, and the protocols, software or programs involved in their working processes also already exist in the prior art. Those skilled in the art are fully aware that the present utility model does not make any improvements to the individual devices, so it does not involve software content. Instead, it relies on the organic integration of each component into a whole, that is, it provides a structural solution.
[0027] Aiming at the technical problem that the traditional multi-point displacement meter is used to monitor faults, which has good effect on monitoring large-angle faults, but has poor effect on monitoring small-angle faults because the small-angle faults are mainly shear deformation and the deformation amount is extremely small, the present utility model provides a cantilever beam type fault dislocation monitoring device, including a drilling hole in the cave wall, a thin-walled aluminum cylinder placed in the drilling hole, a cantilever beam type elastic rod placed in the thin-walled aluminum cylinder, the cantilever beam type elastic rod is connected to the thin-walled aluminum cylinder through a connection plate, several piezoresistive strain gauges are pasted on the cantilever beam type elastic rod, and the lead wire is connected to the piezoresistive strain gauge and transmitted to the reading device outside the cave wall. When the fault dislocates, the thin-walled aluminum cylinder and the connection plate in the present utility model follow the fault to produce corresponding dislocations, and the dislocation of the connection plate can drive the cantilever beam type elastic rod to produce corresponding deflections. The displacement change value is reflected by the change of the resistance value of the piezoresistive strain gauge at the corresponding part of the rod, and is transmitted to the reading device outside the cave wall by the lead wire, so that the dislocation deformation amount generated by the fault and the corresponding dislocation direction can be accurately measured. The structure of the present utility model is simple, the layout is convenient, the monitoring efficiency is high, and it can be well applied to the monitoring of small-angle faults during construction.
[0028] As Figure 1 shown is the cross-sectional schematic diagram of the cantilever beam type fault dislocation monitoring device, including a drilling hole 1 in the cave wall, the drilling hole 1 vertically extends into the cave wall and passes through the fault 8; a thin-walled aluminum cylinder 2 is arranged in the drilling hole 1, and the gap between the drilling hole 1 and the thin-walled aluminum cylinder 2 is bonded by low-pressure grouting 3 to ensure firm bonding between the two and improve the structural integrity.
[0029] The thin-walled aluminum cylinder 2 houses a cantilever beam type elastic rod 4 and a connecting plate 5. One end of the cantilever beam type elastic rod 4 is fixed on the side of the thin-walled aluminum cylinder 2 close to the cave wall, and the other end is connected to the connecting plate 5.
[0030] At one end of the cantilever beam type elastic rod 4 connected to the connecting plate 5, a plurality of piezoresistive strain gauges 6 are arranged along the cross-section direction of the rod. Each piezoresistive strain gauge 6 is connected to a lead wire 7. Each lead wire 7 extends along the length direction of the cantilever beam type elastic rod 4 to a reading device outside the cave wall for transmitting the deformation amount of the relevant piezoresistive strain gauge 6.
[0031] In this embodiment, the drill hole 1 vertically extends into the cave wall by 5 - 10 m and passes through the fault 8.
[0032] In this embodiment, the aperture of the drill hole 1 is 100 - 110 cm, and the diameter of the thin-walled aluminum cylinder 2 differs from the aperture of the drill hole 1 by 1 cm.
[0033] In this embodiment, the cantilever beam type elastic rod 4 is 3 - 5 m long.
[0034] Both the cantilever beam type elastic rod 4 and the connecting plate 5 are made of hard rubber material, so that they not only have a certain stiffness but also can generate a certain amount of deformation following the dislocation of the fault 8.
[0035] As Figure 2 shown, in this embodiment, 8 piezoresistive strain gauges 6 are provided, and the central angle corresponding to each adjacent two piezoresistive strain gauges 6 is 45°.
[0036] The specific working principle is as follows:
[0037] When the fault 8 in the underground chamber generates dislocation deformation, the thin-walled aluminum cylinder 2 and the connecting plate 5 in the present utility model follow the fault 8 to generate corresponding dislocations. The dislocation of the connecting plate 5 can drive the cantilever beam type elastic rod 4 to generate corresponding deflections. The change in the resistance value of the piezoresistive strain gauges 6 at the corresponding positions on the rod reflects the displacement change value. If the piezoresistive strain gauge A elongates by a certain amount and the piezoresistive strain gauge E shortens by the same deformation amount, the bending deformation amount of the cantilever beam type elastic rod 4, that is, the dislocation amount of the fault, can be inferred. And if the piezoresistive strain gauges 6 at positions A and E generate corresponding deformations, it can be inferred that the dislocation direction of the fault 8 is the orthogonal direction perpendicular to the cantilever beam type elastic rod 4, that is, the direction of the AE connection line. Thus, the dislocation deformation amount and the dislocation direction of the fault 8 can be determined.
[0038] In the above-described embodiment, considering the current characteristics of fault monitoring, in order to simplify the construction process, improve the monitoring efficiency, reduce the project cost, and ensure the effectiveness of fault monitoring, when the fault 8 moves, the thin-walled aluminum cylinder 2 and the connecting plate 5 in the present utility model move accordingly with the fault 8, and the movement of the connecting plate 5 can drive the cantilever beam type elastic rod 4 to generate corresponding deflections. The change in the displacement value is reflected by the change in the resistance value of the piezoresistive strain gauge 6 at the corresponding part on the rod, and is transmitted to the reading device outside the cave wall through the lead wire 7, so that the amount of displacement deformation generated by the fault 8 and the corresponding movement direction can be accurately measured. The present utility model is a set of systematic and sustainable operation device, with a simple structure, convenient layout, high monitoring efficiency, and can be well applied to the monitoring of small-angle faults in construction, having practical significance and good application prospects.
[0039] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. A cantilever beam type fault displacement monitoring device, characterized in that, It includes a receiving cavity arranged perpendicular to the fault. An in - cantilever - beam elastic rod (4) and a connecting disc (5) are arranged in the receiving cavity. Both ends of the connecting disc (5) are fixed to the inner wall of the receiving cavity. One end of the in - cantilever - beam elastic rod (4) is fixed on the side of the receiving cavity close to the cave wall, and the other end is connected to the connecting disc (5). A plurality of piezoresistive strain gauges (6) are arranged at the end of the in - cantilever - beam elastic rod (4) connected to the connecting disc (5). Each piezoresistive strain gauge (6) is connected to a lead wire (7) and then connected to a reading device outside the cave wall.
2. The cantilever beam type fault displacement monitoring device according to claim 1, wherein, The receiving cavity is made of a thin - wall aluminum cylinder (2). The thin - wall aluminum cylinder (2) is arranged in a borehole (1) located within the cave wall, and the borehole (1) vertically extends into the cave wall.
3. The cantilever beam type fault dislocation monitoring device according to claim 2, characterized in that, The gap between the borehole (1) and the thin - wall aluminum cylinder (2) is bonded by low - pressure grouting (3).
4. The cantilever beam type fault displacement monitoring device according to claim 2, wherein, The aperture of the borehole (1) is 100 - 110 cm, and the difference between the diameter of the thin - wall aluminum cylinder (2) and the aperture of the borehole (1) is 1 cm.
5. The cantilever beam type fault displacement monitoring device according to claim 1, characterized in that Each lead wire (7) extends along the length direction of the in - cantilever - beam elastic rod (4) to the reading device outside the cave wall to transmit the deformation amount of the relevant piezoresistive strain gauge (6).
6. The cantilever beam type fault displacement monitoring device according to claim 1, characterized in that The in - cantilever - beam elastic rod (4) is 3 - 5 m long.
7. The cantilever beam type fault dislocation monitoring device according to claim 1, wherein Both the in - cantilever - beam elastic rod (4) and the connecting disc (5) are made of hard rubber material.
8. The cantilever beam type fault dislocation monitoring device according to claim 1, characterized in that A plurality of piezoresistive strain gauges (6) are evenly arranged along the cross - section direction of the in - cantilever - beam elastic rod (4) at the end of the in - cantilever - beam elastic rod (4) connected to the connecting disc (5).
9. The cantilever beam type fault displacement monitoring device according to claim 1, characterized in that, Eight piezoresistive strain gauges (6) are provided, and the central angle corresponding to each adjacent two piezoresistive strain gauges (6) is 45°.
10. A cantilever beam type fault displacement monitoring system, characterized in that, It includes a cantilever - beam type fault dislocation monitoring device according to any one of claims 1 - 9.