A tunnel surrounding rock deformation monitoring system

Abstract

The utility model discloses a tunnel surrounding rock deformation monitoring system, including surveying wire, top wire clamp and two place tension wire device, be provided with a plurality of side wire ring on the tunnel surrounding rock between top wire clamp and tension wire device, and the both ends of surveying wire are fixed on tension wire device respectively, and the middle part of surveying wire is fixedly connected with top wire clamp, and the both sides of surveying wire are fixed on the inner wall of tunnel surrounding rock through a plurality of side wire ring traction, side wire ring includes second screw rod, second polygonal screwing part and guide portion, is provided with conducting ring on the guide portion, and each conducting ring is electrically connected with deformation detection line. The utility model discloses deformation detection line connection monitoring system, and the resistance value of surveying wire segmentation is detected unceasingly through monitoring system, thereby detecting the deformation condition of tunnel surrounding rock, and through the analysis of the resistance value change of each surveying wire segmentation, the deformation position of surrounding rock can be further changed and analyzed.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel surrounding rock monitoring equipment, and specifically to a tunnel surrounding rock deformation monitoring system. Background Technology

[0002] Surrounding rock deformation monitoring, or simply surrounding rock monitoring, is the work of monitoring the stress and strain of the surrounding rock and support structure using measuring instruments to understand the mechanical properties of the surrounding rock and the stress state of the support during tunnel construction and operation, and to ensure safety. In practice, the conventional monitoring and measurement workflow requires on-site measurement, on-site recording, manual data entry into the computer, and then data management and calculation through third-party software. This process is cumbersome, labor-intensive, and lacks timeliness of results, making it difficult to meet the requirements of multiple monitoring sessions per day. Therefore, it is necessary to propose a tunnel surrounding rock deformation monitoring system with a simple structure that can monitor in real time. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this utility model provides a tunnel surrounding rock deformation monitoring system.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this invention is as follows: It includes a measuring wire installed on the inner wall of the tunnel surrounding rock, a top clamp installed on the top of the tunnel surrounding rock, and two tensioning devices installed at the bottom of both sides of the tunnel surrounding rock. Several side wire loops are provided on the tunnel surrounding rock between the top clamp and the tensioning devices. The two ends of the measuring wire are fixed to the tensioning devices, the middle of the measuring wire is fixedly connected to the top clamp, and both sides of the measuring wire are pulled and fixed to the inner wall of the tunnel surrounding rock by several side wire loops. Each side wire loop includes a second screw, a second polygonal screwing part fixed to the second screw, and a guide part fixed to the second polygonal screwing part. A wire hole is provided on the guide part, an insulating ring is fixed inside the wire hole, and a conductive ring is fixed inside the insulating ring. Each conductive ring is electrically connected to a deformation detection wire.

[0005] Furthermore, the tensioning device includes a stranded spool and a spool bracket. The two ends of the stranded spool are rotatably mounted on the spool bracket. One end of the stranded spool passes through the spool bracket and is fixedly connected to a turbine. A worm gear bracket is fixedly connected to the side of the spool bracket. A worm gear that cooperates with the turbine is provided on the worm gear bracket. The two ends of the worm gear are rotatably mounted on the worm gear bracket. One end of the worm gear passes through the worm gear bracket and is fixedly connected to a knob.

[0006] Furthermore, the bottom of the spool bracket is provided with at least two mounting holes.

[0007] Furthermore, the stranded spool is provided with stranding holes.

[0008] Furthermore, the top clamp includes a first screw, a first polygonal screwing part fixed on the first screw, and a U-shaped clamp fixed on the first polygonal screwing part. The clamping opening of the U-shaped clamp is used to clamp the measuring wire. One side of the U-shaped clamp is provided with a through hole, and a clamping screw is provided in the through hole. The other side of the U-shaped clamp is provided with a threaded hole that mates with the small end of the clamping screw.

[0009] Furthermore, both sides of the U-shaped clamp are provided with arc-shaped portions that mate with the measuring wires.

[0010] Furthermore, an insulating sleeve is provided between the measuring wire and the U-shaped clamp.

[0011] Furthermore, the traction height of the measuring conductors on adjacent side guide loops is not equal.

[0012] Furthermore, a gap or interference fit is used between the measuring wire and the conductive ring.

[0013] Furthermore, the measuring wires are made of aluminum, aluminum alloy, copper, copper alloy, or stainless steel.

[0014] The beneficial effects of this utility model are as follows: This invention comprises several side guide rings fixed to the inner wall of the tunnel surrounding rock. Measuring wires are slidably threaded onto the conductive rings of these side guide rings, which are connected to deformation detection lines. The side guide rings divide the measuring wires into segments. Deformation detection lines on adjacent conductive rings can detect the resistance value of each segment of the measuring wire, thereby enabling resistance detection of these segments. When the inner wall of the tunnel surrounding rock deforms, the deformed rock causes the side guide rings to move, and the traction position of the side guide rings on the measuring wires also changes. The contact position between the moved measuring wires and the side guide rings changes, thus changing the resistance value of each segment of the measuring wire. By continuously detecting the resistance value of each segment of the measuring wire, deformation detection of the tunnel surrounding rock is achieved.

[0015] The deformation detection line of this utility model is connected to a monitoring system. The monitoring system continuously detects the resistance value of the measuring wire segments, thereby detecting the deformation of the surrounding rock of the tunnel. By analyzing the changes in the resistance value of each measuring wire segment, the deformation location of the surrounding rock can be further analyzed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the tensioning device. Figure 3 This is a schematic diagram of the side conductor loop structure; Figure 4 This is a schematic diagram of the top wire clamp structure; The symbols for each component are as follows: 1. Top clamp; 11. First screw; 12. First polygonal screwing part; 13. U-shaped clamp; 14. Clamping screw; 15. Insulating sleeve; 2. Side conductor ring; 21. Second screw; 22. Second polygonal screwing part; 23. Guide part; 24. Insulating ring; 25. Conductive ring; 3. Measuring wire; 4. Tensioning device; 41. Stranding spool; 42. Spool bracket; 43. Turbine; 44. Worm rod; 45. Worm rod bracket; 46. Knob; 47. Mounting hole; 48. Stranding hole; 5. Surrounding rock of the tunnel; 6. Deformation detection line. Detailed Implementation

[0017] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0018] like Figure 1 As shown, the tunnel surrounding rock deformation monitoring system includes a measuring conductor 3 installed on the inner wall of the tunnel surrounding rock 5, a top clamp 1 installed on the top of the tunnel surrounding rock 5, and two tensioning devices 4 installed at the bottom of both sides of the tunnel surrounding rock 5. Several side conductor rings 2 are installed on the tunnel surrounding rock 5 between the top clamp 1 and the tensioning device 4. The two ends of the measuring conductor 3 are fixed to the tensioning device 4, which is used to tension the two ends of the measuring conductor 3. The middle part of the measuring conductor 3 is fixedly connected to the top clamp 1, and the two sides of the measuring conductor 3 are pulled and fixed to the inner wall of the tunnel surrounding rock 5 by several side conductor rings 2.

[0019] like Figure 2As shown, the tensioning device 4 includes a stranded shaft 41 and a spool bracket 42. Both ends of the stranded shaft 41 are rotatably mounted on the spool bracket 42. One end of the stranded shaft 41 passes through the spool bracket 42 and is fixedly connected to a turbine 43. A worm gear bracket 45 is fixedly connected to the side of the spool bracket 42. A worm gear 42 cooperating with the turbine 43 is provided on the worm gear bracket 45. Both ends of the worm gear 42 are rotatably mounted on the worm gear bracket 45. One end of the worm gear 42 passes through the worm gear bracket 45 and is fixedly connected to a knob 46. At least two mounting holes 47 are provided at the bottom of the spool bracket 42. In this embodiment, each spool bracket 42 has four mounting holes 47. The spool bracket 42 can be easily fixed to the inner wall of the tunnel surrounding rock 5 using the mounting holes 47 and expansion screws. The stranded shaft 41 has stranding holes 48, which can easily fix the measuring wire 3. The measuring wire 3 can be fixed to the stranded shaft 41 by snap-fit ​​or binding. Specifically, the end of the measuring lead 3 is fixed inside the stranding hole 48 of the stranded wire shaft 41, and the worm gear 42 is rotated by the knob 46. The worm gear 42 rotates through the turbine 43. like Figure 3 As shown, the side guide ring 2 includes a second screw 21, a second polygonal screwing part 22 fixed on the second screw 21, and a guide part 23 fixed on the second polygonal screwing part 22. The guide part 23 has a wire hole, an insulating ring 24 is fixed inside the wire hole, and a conductive ring 25 is fixed inside the insulating ring 24. Each conductive ring 25 is electrically connected to a deformation detection line 6. The number of side guide rings 2 can be reasonably set according to the size of the tunnel surrounding rock 5. The distance between adjacent side guide rings 2 is generally preferably between 20cm and 100cm. The denser the side guide rings 2 are, the better the acquisition accuracy of the tunnel surrounding rock deformation monitoring system. The traction height of adjacent side guide rings 2 on the measuring wire 3 is different, thus ensuring that the conductive rings 25 of the side guide rings 2 can all contact the measuring wire 3. The measuring wire 3 and the conductive ring 25 are fitted with a gap or interference fit, thus ensuring that the measuring wire 3 can slide smoothly within the conductive ring 25. The measuring lead wire 3 is made of aluminum wire, aluminum alloy wire, copper wire, copper alloy wire, or stainless steel wire; aluminum wire and copper wire have good conductivity; aluminum alloy wire and copper alloy wire have better structural strength, are not prone to elongation deformation, and have better detection accuracy; stainless steel wire has good structural strength, and the material has stable chemical properties.

[0020] like Figure 4As shown, the top clamp 1 includes a first screw 11, a first polygonal screwing part 12 fixed to the first screw 11, and a U-shaped clamp 13 fixed to the first polygonal screwing part 12. The clamping opening of the U-shaped clamp 13 is used to clamp the measuring wire 3. One side of the U-shaped clamp 13 is provided with a through hole, and a clamping screw 14 is provided in the through hole. The other side of the U-shaped clamp 13 is provided with a threaded hole that mates with the small end of the clamping screw 14. Both sides of the U-shaped clamp 13 are provided with arc-shaped parts that mate with the measuring wire 3. The arc-shaped parts can better fit the outside of the measuring wire 3, thereby clamping the measuring wire 3. An insulating sleeve 15 is provided between the measuring wire 3 and the U-shaped clamp 13, which can provide better insulation between the top clamp 1 and the measuring wire 3.

[0021] Working principle and process: When installing the tunnel surrounding rock deformation monitoring system, S1: First, drill holes in the inner wall of the tunnel surrounding rock 5 to embed expansion tubes for expansion screws. Then, install and fix the top clamp 1, side conductor ring 2, and tensioning device 4 onto the tunnel surrounding rock 5. S2: Fix one end of the measuring conductor 3 to the stranded shaft 41 of one tensioning device 4. The other end of the measuring conductor 3 first passes through the conductive ring 25 of one side conductor ring 2, then through the U-shaped clamp 13 of the top clamp 1, and then through the conductive ring 25 of the other side conductor ring 2. Then, fix the other end of the measuring conductor 3 to the stranded shaft 41 of another tensioning device 4. S3: Adjust the clamping screw 14 to clamp and fix the middle of the measuring conductor 3. Then, adjust the two tensioning devices 4 to slowly tension the measuring conductor 3 on both sides until both sides of the measuring conductor 3 are in contact with the conductive ring 25 of the side conductor ring 2. Stop the tensioning operation of the tensioning device 4. S4: Connect the deformation detection line 6 on the conductive ring 25 to the monitoring system. The monitoring system continuously detects and measures the resistance value of the segment of the conductor 3, thereby detecting the deformation of the surrounding rock of the tunnel. It can also analyze the deformation location of the surrounding rock based on the resistance change.

[0022] In this invention, several side guide rings 2 are fixed to the inner wall of the tunnel surrounding rock 5. Measuring wires 3 are slidably threaded through the conductive rings 25 of the side guide rings 2. Deformation detection lines 6 are connected to the conductive rings 25. The side guide rings 2 divide the measuring wires into several segments. The deformation detection lines 6 on adjacent conductive rings 25 can detect the resistance value of each segment of the measuring wire 3, thereby achieving resistance detection of the segments of the measuring wire 3. When the inner wall of the tunnel surrounding rock 5 deforms, the deformed tunnel surrounding rock 5 drives the side guide rings 2 to move, and the traction position of the side guide rings 2 on the measuring wires 3 also moves accordingly. The contact position between the moved measuring wires 3 and the side guide rings 2 changes, thus causing the resistance value of each segment of the measuring wire 3 to change. By continuously detecting the resistance value of each segment of the measuring wire 3, deformation detection of the tunnel surrounding rock 5 is achieved.

Claims

1. A tunnel surrounding rock deformation monitoring system, characterized in that, The system includes a measuring wire (3) installed on the inner wall of the tunnel surrounding rock (5), a top clamp (1) installed on the top of the tunnel surrounding rock (5), and two tensioning devices (4) installed at the bottom of both sides of the tunnel surrounding rock (5); several side wire rings (2) are provided on the tunnel surrounding rock (5) between the top clamp (1) and the tensioning device (4); the two ends of the measuring wire (3) are fixed on the tensioning device (4), the middle part of the measuring wire (3) is fixedly connected to the top clamp (1), and the two sides of the measuring wire (3) are pulled and fixed on the inner wall of the tunnel surrounding rock (5) by several side wire rings (2); The side guide ring (2) includes a second screw (21), a second polygonal screwing part (22) fixed on the second screw (21), and a guide part (23) fixed on the second polygonal screwing part (22). The guide part (23) is provided with a wire hole, an insulating ring (24) is fixed in the wire hole, and a conductive ring (25) is fixed in the insulating ring (24). Each conductive ring (25) is electrically connected to a deformation detection line (6).

2. The tunnel surrounding rock deformation monitoring system according to claim 1, characterized in that, The tensioning device (4) includes a stranded shaft (41) and a spool bracket (42). The two ends of the stranded shaft (41) are rotatably mounted on the spool bracket (42). One end of the stranded shaft (41) passes through the spool bracket (42) and is fixed with a turbine (43). A worm gear bracket (45) is fixedly connected to the side of the spool bracket (42). A worm gear (44) that cooperates with the turbine (43) is provided on the worm gear bracket (45). The two ends of the worm gear (44) are rotatably mounted on the worm gear bracket (45). One end of the worm gear (44) passes through the worm gear bracket (45) and is fixedly connected with a knob (46).

3. The tunnel surrounding rock deformation monitoring system according to claim 2, characterized in that, The bottom of the spool bracket (42) is provided with at least two mounting holes (47).

4. The tunnel surrounding rock deformation monitoring system according to claim 2, characterized in that, The stranding shaft (41) is provided with a stranding hole (48).

5. The tunnel surrounding rock deformation monitoring system according to claim 1, characterized in that, The top clamp (1) includes a first screw (11), a first polygonal screwing part (12) fixed on the first screw (11), and a U-shaped clamp (13) fixed on the first polygonal screwing part (12). The clamping port of the U-shaped clamp (13) is used to clamp the measuring wire (3). A through hole is provided on one side of the U-shaped clamp (13), and a clamping screw (14) is provided in the through hole. A threaded hole that mates with the small end of the clamping screw (14) is provided on the other side of the U-shaped clamp (13).

6. The tunnel surrounding rock deformation monitoring system according to claim 5, characterized in that, Both sides of the U-shaped clamp (13) are provided with arc-shaped parts that cooperate with the measuring wire (3).

7. The tunnel surrounding rock deformation monitoring system according to claim 5, characterized in that, An insulating sleeve (15) is provided between the measuring wire (3) and the U-shaped clamp (13).

8. The tunnel surrounding rock deformation monitoring system according to claim 1, characterized in that, The traction height of the adjacent side guide rings (2) on the measuring guide (3) is not equal.

9. The tunnel surrounding rock deformation monitoring system according to claim 1, characterized in that, The measuring lead (3) and the conductive ring (25) are fitted with a gap or an interference fit.

10. The tunnel surrounding rock deformation monitoring system according to claim 1, characterized in that, The measuring wire (3) is an aluminum wire, aluminum alloy wire, copper wire, copper alloy wire or stainless steel wire.

Images