Monitoring equipment for deformation of tunnel supporting structure

Abstract

The utility model relates to the technical field of tunnel support deformation detection, in particular to a monitoring device for tunnel support structure deformation, which comprises a central disc and a deformation measuring mechanism, a mounting cylinder is fixedly mounted on the side edge of the central disc, a conductive tube is arranged on the inner side of the mounting cylinder, and a sleeve is slidably mounted on the conductive tube. A tunnel supporting structure supporting plate is arranged on the sleeve, and a friction limiting mechanism is arranged on the side edge of the mounting cylinder. The deformation measuring mechanism comprises a linear resistor sliding cylinder and a conductive seat, the linear resistor sliding cylinder is fixedly mounted on the inner wall of the mounting cylinder, and a conductive tube is slidably inserted into the inner side of the linear resistor sliding cylinder. According to the utility model, the deformation measuring mechanism is arranged, the relation between circuit current and resistance is utilized by the deformation measuring mechanism for calculation, the calculation result is accurate, and the deformation on the supporting structure can be quantitatively measured, so that the specific deformation of the supporting structure can be accurately and quantitatively analyzed, and important data reference is provided for safe construction of a tunnel; and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel support deformation detection, in particular to a monitoring device for deformation of a tunnel support structure. Background Art

[0002] Tunnel support deformation detection is an important measure to ensure the safe operation of the tunnel. It involves a series of technologies and methods to monitor the stability and safety of the tunnel support structure. The main purpose of tunnel support deformation detection is to ensure the safe operation of the tunnel by conducting comprehensive and accurate detection and monitoring of the tunnel support structure.

[0003] Referring to the invention patent with the authorized patent number CN115014277A, a deformation monitoring device for a tunnel support structure is disclosed, including an arc-shaped mounting frame, a first deformation monitor and a second deformation monitor. The arc-shaped mounting frame is arranged in the tunnel support structure, and the first deformation monitor is arranged on the arc-shaped mounting frame and contacts the inner side surface of the tunnel support structure; the second deformation monitor is arranged on the arc-shaped mounting frame and is in slidable contact with the inner side surface of the tunnel support structure; the present invention arranges a deformation monitor on the inner side surface of the tunnel support structure, monitors the pressure through the deformation monitor and adjusts the position of the deformation monitor to quickly find the deformation point, thereby improving the accuracy and timeliness of deformation monitoring, determining the range of different deformation degrees, and improving the utilization rate of the monitoring instrument.

[0004] During use, it was found that the above patent uses a pressure sensor to detect the deformation of the supporting structure, which can only make a directional analysis of whether the supporting structure is deformed or not, and cannot quantitatively measure the deformation value. Therefore, it is impossible to make an accurate quantitative analysis of the specific deformation of the supporting structure. For this reason, we propose a monitoring device for the deformation of tunnel support structures. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art and proposes a monitoring device for deformation of a tunnel support structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A monitoring device for the deformation of a tunnel support structure, comprising a central disc and a deformation measuring mechanism, wherein a mounting cylinder is fixedly mounted on the side of the central disc, a conductive tube is arranged on the inner side of the mounting cylinder, a sleeve is slidably mounted on the conductive tube, a tunnel support structure support plate is arranged on the sleeve, and a friction limiting mechanism is arranged on the side of the mounting cylinder; the deformation measuring mechanism comprises a linear resistance slide cylinder and a conductive seat, the linear resistance slide cylinder is fixedly mounted on the inner wall of the mounting cylinder, the conductive tube is slidably plugged into the inner side of the linear resistance slide cylinder, the conductive seat is fixedly mounted on the side wall of the conductive tube, the linear resistance slide cylinder is electrically connected with a lower wire, the lower wire extends to the outer side of the central disc, the conductive seat is electrically connected with an upper wire, and the lower wire and the upper wire are jointly connected to a central control processing and measuring system; the friction limiting mechanism comprises a side support rod, a mounting block is fixedly mounted on the side support rod, a slide seat is slidably mounted on the inner side of the mounting block, and a threaded push rod is screwed on the outer side of the mounting block.

[0008] Preferably, six mounting cylinders are evenly distributed along the circumference of the central disk.

[0009] Preferably, a stud is fixedly installed on the casing, and a threaded sleeve is fixedly connected to the bottom of the tunnel support structure support plate, and the threaded sleeve is threadedly installed on the outside of the stud.

[0010] Preferably, an anti-slip groove is provided on the support plate of the tunnel support structure.

[0011] Preferably, a limiting bolt is threadedly installed on the side wall of the sleeve, and the inner end of the limiting bolt abuts against the side wall of the conductive tube.

[0012] Preferably, the central control processing and calculation system includes a control mainboard, a test power supply and a current measuring meter.

[0013] Preferably, electrode connectors are welded to the ends of the lower wire and the upper wire, and circular holes are formed on the electrode connectors.

[0014] Preferably, the inner end of the threaded push rod is rotatably connected to the slide seat, the inner side surface of the slide seat is an arc surface adapted to the conductive tube, and the outer end of the threaded push rod is fixedly connected to a nut.

[0015] Compared with the related art, the monitoring device for deformation of tunnel support structure proposed by the utility model has the following beneficial effects:

[0016] In the utility model, a monitoring device for deformation of a tunnel support structure is provided, through a deformation measuring mechanism, in which installation cylinders in six directions equidistantly distributed around the circumference of a central disk and a corresponding deformation measuring mechanism are provided, the utility model is installed at the center of the support structure, and the tunnel support structure support plate is installed in contact with each direction of the support structure, when the support structure is deformed in a certain direction, the tunnel support structure support plate drives the casing and the conductive tube sleeved on the inner side of the casing to slide on the linear resistance slide cylinder, and the effective resistance value of the linear resistance slide cylinder connected to the central control processing and measurement system through the upper wire and the lower wire changes, then the circuit The current has changed, and the central control processing and measurement system can reversely calculate the resistance change value based on the current change in the circuit. Since the linear resistance slider is a linear resistor, its resistivity is a constant. The central control processing and measurement system can accurately calculate the slippage of the conductive tube inside the linear resistance slider based on the resistivity of the linear resistance slider. This value is equal to the deformation of the support structure transmitted on the support plate of the tunnel support structure. The measurement result is calculated through the relationship between the circuit current and the resistance. The calculation result is accurate and can quantitatively measure the deformation on the support structure. Therefore, the specific deformation of the support structure can be accurately analyzed quantitatively, which provides important data reference for safe tunnel construction and improves practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional structure diagram of a monitoring device for tunnel support structure deformation proposed by the utility model Figure 1 ;

[0018] Figure 2 A three-dimensional structure diagram of a monitoring device for tunnel support structure deformation proposed by the utility model Figure 2 ;

[0019] Figure 3 for Figure 1 Enlarged schematic diagram of part A in the middle.

[0020] In the figure: 1. center disk; 2. mounting tube; 3. conductive tube; 4. casing; 5. stud; 6. threaded sleeve; 7. tunnel support structure support plate; 8. limit bolt; 9. anti-slip groove; 10. linear resistor slide cylinder; 11. lower conductor; 12. conductive seat; 13. upper conductor; 14. electrode connector; 15. side support rod; 16. mounting block; 17. slide seat; 18. threaded push rod; 19. nut. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Reference Figure 1-3 , please refer to Figure 1-Figure 3,in, Figure 1 A three-dimensional structure diagram of a monitoring device for tunnel support structure deformation proposed by the utility model Figure 1 ; Figure 2 A three-dimensional structure diagram of a monitoring device for tunnel support structure deformation proposed by the utility model Figure 2 ; Figure 3 for Figure 1 A monitoring device for deformation of a tunnel support structure comprises: a central disc 1 and a deformation measuring mechanism, a mounting tube 2 is fixedly mounted on the side of the central disc 1, a conductive tube 3 is arranged inside the mounting tube 2, a sleeve 4 is slidably mounted on the conductive tube 3, a tunnel support structure support plate 7 is arranged on the sleeve 4, and a friction limiting mechanism is arranged on the side of the mounting tube 2.

[0023] In this method, the deformation measuring mechanism includes a linear resistance slide 10 and a conductive seat 12. The linear resistance slide 10 is fixedly mounted on the inner wall of the mounting tube 2. The conductive tube 3 is slidably inserted into the inner side of the linear resistance slide 10. The conductive seat 12 is fixedly mounted on the side wall of the conductive tube 3. The linear resistance slide 10 is electrically connected to a lower wire 11, which extends to the outside of the central disk 1. The conductive seat 12 is electrically connected to an upper wire 13. The lower wire 11 and the upper wire 13 are connected to a central control processing and measuring system. The central control processing and measuring system includes a control mainboard, a test power supply and an ammeter.

[0024] Through the above-mentioned arrangement, when the conductive tube 3 and the linear resistance slider 10 slide, since the upper wire 13 is connected to the conductive tube and the lower wire 11 is connected to the bottom of the linear resistance slider 10, the effective resistance value of the linear resistance slider 10 connected to the central control processing and calculation system is the section from the contact point between the bottom of the conductive tube 3 and the linear resistance slider 10 to the bottom of the linear resistance slider 10. As the conductive tube 3 and the linear resistance slider 10 slide relative to each other, the connected effective resistance will change, and then the central control processing and calculation system can reversely calculate the resistance change value according to the current change of the circuit. Since the linear resistance slider 10 is a linear resistor, its resistivity is a constant. Therefore, the central control processing and calculation system can accurately calculate the sliding amount of the conductive tube 3 inside the linear resistance slider 10 according to the resistivity of the linear resistance slider 10.

[0025] In this embodiment, the friction limiting mechanism includes a side support rod 15, a mounting block 16 is fixedly mounted on the side support rod 15, a slide seat 17 is slidably mounted on the inner side of the mounting block 16, a threaded push rod 18 is threadedly mounted on the outer side of the mounting block 16, the inner end of the threaded push rod 18 is rotatably connected to the slide seat 17, the inner side surface of the slide seat 17 is an arc surface adapted to the conductive tube 3, and the outer end of the threaded push rod 18 is fixedly connected to a nut 19.

[0026] By the arrangement in the above manner, the threaded push rod 18 can be driven to rotate by rotating the nut 19, thereby driving the inner slide 17 to slide, pushing the slide 17 inward to make it abut against the conductive tube 3, and utilizing the lateral friction force of the slide 17 to prevent the conductive tube 3 and the linear resistor slide cylinder 10 from sliding easily. When the device is installed in the support structure, the lateral friction force of the slide 17 provides support for the entire center disk 1.

[0027] In this embodiment, six mounting cylinders 2 are evenly distributed along the circumference of the central disk 1 .

[0028] Through the above-mentioned arrangement, the device can simultaneously detect the deformation of the supporting structure in six directions.

[0029] In this embodiment, a stud 5 is fixedly installed on the casing 4 , a threaded sleeve 6 is fixedly connected to the bottom of the tunnel support structure support plate 7 , and the threaded sleeve 6 is threadedly installed on the outside of the stud 5 .

[0030] By means of the arrangement described above, the installation and disassembly of the tunnel support structure support plate 7 and the upper end of the casing 4 are made convenient, and the actual installation and disassembly work is facilitated.

[0031] In this embodiment, an anti-skid groove 9 is provided on the tunnel support structure support plate 7. It should be noted that the opening direction of the anti-skid groove 9 is parallel to the center disk 1, so that the device has the ability to resist lateral sliding and maintain its installation stability.

[0032] In this embodiment, a limiting bolt 8 is threadedly installed on the side wall of the sleeve 4 , and the inner end of the limiting bolt 8 abuts against the side wall of the conductive tube 3 .

[0033] Through the arrangement in the above manner, the sleeve 4 and the conductive tube 3 have relative sliding freedom. When the limit bolt 8 is tightened, the sliding freedom of the sleeve 4 and the conductive tube 3 can be limited, so that the total length of the sleeve 4 and the conductive tube 3 is a constant, and then the sliding amount transmitted to the lower end of the conductive tube 3 is the accurate value of the deformation amount at the support plate of the tunnel support structure.

[0034] In this embodiment, electrode connectors 14 are welded to the ends of the lower wire 11 and the upper wire 13 , and a circular hole is formed on the electrode connector 14 .

[0035] With the above arrangement, the circular hole formed on the electrode connector 14 facilitates the wiring of the wire.

[0036] The working principle of the monitoring device for deformation of tunnel support structure provided by the utility model is as follows:

[0037] When in use, the utility model is installed at the center of the support structure, and the tunnel support structure support plate 7 is installed in contact with the support structure in all directions, and the limit bolt 8 is tightened to limit the sliding freedom between the conductive tube 3 and the casing 4. Subsequently, the nut 19 is rotated to drive the threaded push rod 18 to rotate, thereby driving the inner slide seat 17 to slide, and the slide seat 17 is pushed inward to make it contact with the conductive tube 3. The lateral friction force of the slide seat 17 is used to prevent the conductive tube 3 and the linear resistance slide cylinder 10 from sliding easily, so as to provide support for the center disk 1. When the support structure is deformed in a certain direction, the tunnel support structure support plate 7 drives the casing 4 and the casing 4 When the conductive tube 3 sleeved on the inner side slides on the linear resistance slide 10, the effective resistance value of the linear resistance slide 10 connected to the central control processing and calculation system through the upper wire 13 and the lower wire 11 changes, and the current in the circuit changes. Then, the central control processing and calculation system can reversely calculate the resistance change value according to the current change of the circuit. Since the linear resistance slide 10 is a linear resistor, its resistivity is a constant. Therefore, the central control processing and calculation system can accurately calculate the sliding amount of the conductive tube 3 inside the linear resistance slide 10 according to the resistivity of the linear resistance slide 10, and this value is equal to the deformation amount of the support structure transmitted on the tunnel support structure support plate 7.

[0038] Compared with the related art, the monitoring device for deformation of tunnel support structure provided by the utility model has the following beneficial effects:

[0039] The utility model provides a monitoring device for the deformation of a tunnel support structure. The utility model sets a deformation measuring mechanism, which uses the relationship between circuit current and resistance for calculation. The calculation result is accurate and can quantitatively measure the deformation on the support structure. Therefore, an accurate quantitative analysis can be made on the specific deformation of the support structure, which provides important data reference for safe tunnel construction and improves practicality.

[0040] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A monitoring device for deformation of a tunnel support structure, characterized in that: It comprises a central disk (1) and a deformation measuring mechanism, wherein a mounting tube (2) is fixedly mounted on the side of the central disk (1), a conductive tube (3) is arranged inside the mounting tube (2), a sleeve (4) is slidably mounted on the conductive tube (3), a tunnel support structure support plate (7) is arranged on the sleeve (4), and a friction limiting mechanism is arranged on the side of the mounting tube (2); The deformation measuring mechanism comprises a linear resistance slide cylinder (10) and a conductive seat (12), wherein the linear resistance slide cylinder (10) is fixedly mounted on the inner wall of the mounting cylinder (2), the conductive tube (3) is slidably inserted inside the linear resistance slide cylinder (10), and the conductive seat (12) is fixedly mounted on the side wall of the conductive tube (3), the linear resistance slide cylinder (10) is electrically connected to a lower conductor (11), the lower conductor (11) extends to the outside of the central disk (1), and the conductive seat (12) is electrically connected to an upper conductor (13), and the lower conductor (11) and the upper conductor (13) are connected to a central control processing and measurement system; The friction limiting mechanism comprises a side support rod (15), a mounting block (16) is fixedly mounted on the side support rod (15), a sliding seat (17) is slidably mounted on the inner side of the mounting block (16), and a threaded push rod (18) is threadedly mounted on the outer side of the mounting block (16).

2. A monitoring device for deformation of a tunnel support structure according to claim 1, characterized in that: There are six installation cylinders (2) distributed equidistantly along the circumference of the central disk (1).

3. The monitoring device for deformation of a tunnel support structure according to claim 1, characterized in that: A stud (5) is fixedly mounted on the casing (4), a threaded sleeve (6) is fixedly connected to the bottom of the tunnel support structure support plate (7), and the threaded sleeve (6) is threadedly mounted on the outside of the stud (5).

4. The monitoring device for deformation of a tunnel support structure according to claim 1, characterized in that: The tunnel support structure support plate (7) is provided with an anti-slip groove (9).

5. The monitoring device for deformation of a tunnel support structure according to claim 1, characterized in that: A limiting bolt (8) is threadedly installed on the side wall of the sleeve (4), and the inner end of the limiting bolt (8) abuts against the side wall of the conductive tube (3).

6. The monitoring device for deformation of a tunnel support structure according to claim 1, characterized in that: The central control processing and calculation system comprises a control mainboard, a test power supply and a current measuring meter.

7. The monitoring device for deformation of a tunnel support structure according to claim 1, characterized in that: The ends of the lower wire (11) and the upper wire (13) are both welded with electrode joints (14), and a circular hole is provided on the electrode joint (14).

8. The monitoring device for deformation of a tunnel support structure according to claim 1, characterized in that: The inner end of the threaded push rod (18) is rotatably connected to the slide seat (17), the inner side surface of the slide seat (17) is an arc surface adapted to the conductive tube (3), and the outer end of the threaded push rod (18) is fixedly connected to a nut (19).

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