Tunnel wall surface deformation detection device

Abstract

The utility model discloses a tunnel wall surface deformation detection device, which comprises a plurality of fixed rods and a plurality of groups of telescopic rod assemblies, the fixed rods are fixedly arranged on the tunnel wall surface at intervals along the circumferential direction of a tunnel, the axes of the fixed rods are positioned on the same vertical section, and the telescopic rod assemblies are arranged in the same vertical section. Each telescopic rod assembly is arranged between two adjacent fixed rods and comprises a movable rod and a rod sleeve, a first through groove is formed in the side wall of the rod sleeve, scale marks are arranged outside the rod sleeve, one end of the movable rod is inserted into one end of the rod sleeve in a sliding mode, a pointer is arranged on the side wall of one end of the movable rod, and the pointer is arranged in the first through groove in a sliding mode. The other ends of the movable rods and the other ends of the rod sleeves are rotationally connected with the ends, extending out of the tunnel wall face, of the adjacent fixed rods correspondingly. Through the arrangement, the detection efficiency is improved, and the danger of detection personnel during detection is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of engineering testing technology, specifically relating to a tunnel wall deformation detection device. Background Technology

[0002] Tunnels are engineering structures buried underground. To ensure the safety and stability of the tunnel structure, deformation detection of the tunnel walls is necessary. Current technology for tunnel wall deformation detection typically involves installing multiple identification targets on the same cross-section of the tunnel, and then using a total station to measure the coordinates of these targets. However, the large number of identification targets within the tunnel and the limited measuring distance of the total station necessitate multiple setups of the total station within the tunnel by the inspection personnel. This process is complex and poses safety hazards.

[0003] Chinese Patent CN119063684A discloses a tunnel structure deformation monitoring device and method. The method includes several fixed ends and measuring rods, all mounted on the inner wall of the same cross-section of the tunnel whose deformation needs to be monitored. A measuring rod is positioned between two adjacent fixed ends. Each fixed end includes a fixed cylinder mounted on a base. A hollow rotating shaft is positioned on the central axis of the fixed cylinder, and a resistive angle sensor is installed inside the rotating shaft. This method utilizes the resistive angle sensor to measure the angle change of the measuring rods between the fixed ends caused by tunnel deformation, thereby detecting tunnel structure deformation.

[0004] When using the above solution, the length of the measuring rod is fixed, which requires high installation accuracy at the fixed end, making construction difficult. Furthermore, it requires the installation of resistive angle sensors in each fixed end. Since a large number of fixed ends are installed in the tunnel, the cost of the above solution is high. Utility Model Content

[0005] The present invention aims to provide a tunnel wall deformation detection device to solve the problems of high construction difficulty and high cost of the above-mentioned solutions.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A tunnel wall deformation detection device includes fixed rods and telescopic rod assemblies. Multiple fixed rods are fixedly arranged at intervals along the tunnel circumference on the tunnel wall, with the axes of the multiple fixed rods located at the same vertical cross-section. Multiple sets of telescopic rod assemblies are provided, each set positioned between two adjacent fixed rods. Each telescopic rod assembly includes a movable rod and a rod sleeve. A first through groove is formed on the side wall of the rod sleeve, and a scale line is provided on the outside of the rod sleeve. One end of the movable rod is slidably inserted into one end of the rod sleeve, and a pointer is provided on the side wall of one end of the movable rod, the pointer slidingly disposed within the first through groove. The other end of the movable rod and the other end of the rod sleeve are rotatably connected to the ends of adjacent fixed rods extending out of the tunnel wall.

[0008] The principle and effects of this technical solution:

[0009] First, multiple fixed rods are fixed to the tunnel wall at intervals along the tunnel circumference with their axes aligned on the same vertical plane. After sliding one end of the movable rod into one end of the rod sleeve, the telescopic rod assembly is placed between two adjacent fixed rods, and the other end of the movable rod and the other end of the rod sleeve are rotatably connected to the adjacent fixed rods. The reading of the scale line aligned with the pointer is recorded for the first time. After a certain interval, the reading of the scale line aligned with each pointer is recorded again and compared with the data recorded for the first time. The tunnel wall with the fixed rods connected to the telescopic rod assembly with the change in the two sets of readings has deformed.

[0010] With the above setup, inspectors can directly observe the scale line aligned with the pointer to determine whether the tunnel wall has deformed, which improves inspection efficiency and reduces the danger to inspectors. At the same time, by using the telescopic rod assembly, the installation accuracy requirements of the fixed rod are reduced, thereby reducing the construction difficulty of this device. In addition, the device has a simple structure, which reduces the project cost.

[0011] In this utility model, a sleeve is slidably fitted on the outer wall of the sleeve, and a second through groove aligned with the first through groove is opened on the side wall of the sleeve. The scale line is set on the outer wall of the sleeve, and a hand-tightening bolt is threaded through the side wall of the sleeve. The axis of the hand-tightening bolt is perpendicular to the axis of the sleeve.

[0012] The principle and effects of this technical solution:

[0013] After rotating the two ends of the telescopic rod assembly to the adjacent fixed rod, loosen the hand-tightening bolt, slide the sleeve, align the middle mark of the scale line on the outer wall of the sleeve with the pointer, and then tighten the hand-tightening bolt so that the end of the hand-tightening bolt presses against the rod sleeve.

[0014] With the above settings, the sleeve can be fixed after it is slid to the appropriate position, thereby aligning the middle scale of each scale line with the corresponding pointer. This allows the inspector to intuitively read the length change value of the telescopic rod assembly during the inspection process without having to perform secondary calculations, further improving the inspection efficiency.

[0015] In this invention, protrusions are fixedly provided on both sides of the second through groove on the inner sidewall of the sleeve, and both protrusions are slidably embedded in the first through groove. This arrangement prevents the sleeve from rotating relative to the rod sleeve.

[0016] In this invention, a groove is provided on the outer wall of one end of the movable rod, and a slider is slidably embedded in the groove. A compression spring is provided between the slider and the end wall of the groove, and the pointer is fixedly located on the end wall of the slider away from the compression spring. This design allows for the disassembly and assembly of the various components of the device, facilitating their classification, storage, and transportation.

[0017] This invention also includes a rotating shaft. Two first connecting lugs are fixedly provided at intervals at one end of the fixed rod extending from the tunnel wall. The rotating shaft rotatably passes through the two first connecting lugs. The other end of the movable rod and the other end of the rod sleeve are rotatably sleeved on the rotating shaft between the two first connecting lugs. A target is provided at one end of the rotating shaft, and a first nut is threaded onto the outer wall of the other end of the rotating shaft. Through the above arrangement, the other end of the movable rod and the other end of the rod sleeve are rotatably connected to the adjacent fixed rod. Simultaneously, the initial coordinates of each target can be detected and recorded. During routine inspections, inspectors only need to detect the coordinates of the targets installed on the tunnel wall where deformation has occurred, reducing the workload of the inspectors.

[0018] This invention also includes a fastening bolt. Two second connecting lugs are fixedly arranged at a distance from one end of the rotating shaft. A connecting block is fixedly arranged on the end wall of the target. The fastening bolt rotatably passes through the two second connecting lugs, and the connecting block is rotatably sleeved on the fastening bolt between the two second connecting lugs. A second nut is fixedly arranged on the outer wall of one of the second connecting lugs along the axial direction of the fastening bolt. This arrangement facilitates the installation of the target and allows for adjustment of its orientation.

[0019] In this invention, an anti-slip pad is fixedly provided at the end of the hand-tightening bolt near the rod sleeve. This design prevents the sleeve from sliding relative to the rod sleeve, thus improving the accuracy of the device's detection results. Attached Figure Description

[0020] Figure 1 This is an isometric view of the utility model in use.

[0021] Figure 2 This is a partial isometric view of the present invention;

[0022] Figure 3 Disassembly of the components of this utility model Figure 1 ;

[0023] Figure 4 Disassembly of the components of this utility model Figure 2 . Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0025] The reference numerals in the accompanying drawings include: 10, fixed rod; 11, first connecting lug; 20, telescopic rod assembly; 21, movable rod; 211, groove; 22, rod sleeve; 221, first through groove; 30, sleeve; 31, scale line; 32, second through groove; 33, hand-tightening bolt; 34, protrusion; 40, pointer; 41, slider; 42, compression spring; 50, rotating shaft; 51, first nut; 52, second connecting lug; 53, second nut; 60, target; 61, connecting block; 70, fastening bolt.

[0026] Example:

[0027] As attached Figure 1-4 As shown, this utility model discloses a tunnel wall deformation detection device, including fixed rods 10 and telescopic rod assemblies 20. Multiple fixed rods 10 are fixedly arranged at intervals along the tunnel circumference on the tunnel wall, with the axes of the multiple fixed rods 10 located in the same vertical section. Multiple sets of telescopic rod assemblies 20 are provided, each set positioned between two adjacent fixed rods 10. Each telescopic rod assembly 20 includes a movable rod 21 and a rod sleeve 22. A first through groove 221 is formed on the side wall of the rod sleeve 22, and a scale line 31 is provided on the outside of the rod sleeve 22. One end of the movable rod 21 is slidably inserted into one end of the rod sleeve 22, and a pointer 40 is provided on the side wall of one end of the movable rod 21. The pointer 40 is slidably disposed within the first through groove 221. The other end of the movable rod 21 and the other end of the rod sleeve 22 are rotatably connected to the ends of adjacent fixed rods 10 extending out of the tunnel wall.

[0028] In this embodiment, a sleeve 30 is slidably fitted on the outer wall of the sleeve 22. A second through groove 32 aligned with the first through groove 221 is opened on the side wall of the sleeve 30. The scale line 31 is set on the outer wall of the sleeve 30. A hand-tightening bolt 33 is threaded through the side wall of the sleeve 30. The axis of the hand-tightening bolt 33 is perpendicular to the axis of the sleeve 30. The middle scale of the scale line 31 is set to the 0 scale.

[0029] In this embodiment, the inner sidewall of the sleeve 30 is fixedly provided with protrusions 34 on both sides of the second through groove 32. Both protrusions 34 are slidably embedded in the first through groove 221, and the end walls of the two protrusions 34 do not extend into the area enclosed by the inner sidewall of the sleeve 22.

[0030] In this embodiment, a groove 211 is provided on the outer wall of one end of the movable rod 21, a slider 41 is slidably embedded in the groove 211, a compression spring 42 is provided between the slider 41 and the end wall of the groove 211, and the pointer 40 is fixedly provided on the end wall of the slider 41 away from the compression spring 42.

[0031] In this embodiment, a rotating shaft 50 is also included. Two first connecting ears 11 are fixedly provided at intervals at one end of the fixed rod 10 extending out of the tunnel wall. The rotating shaft 50 is rotatably passed through the two first connecting ears 11. The other end of the movable rod 21 and the other end of the rod sleeve 22 are respectively rotatably sleeved on the rotating shaft 50 between the two first connecting ears 11. A target 60 is provided at one end of the rotating shaft 50, and a first nut 51 is threaded on the outer wall of the other end of the rotating shaft 50.

[0032] In this embodiment, a fastening bolt 70 is also included. Two second connecting ears 52 are fixedly provided at a distance from one end of the rotating shaft 50. A connecting block 61 is fixedly provided on the end wall of the target 60. The fastening bolt 70 is rotatably passed through the two second connecting ears 52. The connecting block 61 is rotatably sleeved on the fastening bolt 70 between the two second connecting ears 52. A second nut 53 is fixedly provided on the outer side wall of one of the second connecting ears 52 along the axial direction of the fastening bolt 70.

[0033] In this embodiment, an anti-slip pad is fixedly provided at the end of the hand-tightening bolt 33 near the sleeve 22.

[0034] The specific implementation process is as follows:

[0035] First, multiple fixed rods 10 are fixedly installed on the tunnel wall at intervals along the tunnel circumference with their axes located on the same vertical plane. After sliding one end of the movable rod 21 into one end of the rod sleeve 22, the telescopic rod assembly 20 is placed between two adjacent fixed rods 10, and the other end of the movable rod 21 and the other end of the rod sleeve 22 are rotatably connected to the adjacent fixed rods 10 respectively. The reading of the scale line 31 aligned with the pointer 40 is recorded for the first time. After a certain interval, the reading of the scale line 31 aligned with each pointer 40 is recorded again and compared with the data recorded for the first time. The tunnel wall with the fixed rods 10 connected to the telescopic rod assembly 20 with the change in the two sets of readings has deformed.

[0036] After rotating the two ends of the telescopic rod assembly 20 to the adjacent fixed rod 10, loosen the hand-tightening bolt 33, slide the sleeve 30 so that the middle mark of the scale line 31 on the outer wall of the sleeve 30 is aligned with the pointer 40, and then tighten the hand-tightening bolt 33 so that the end of the hand-tightening bolt 33 presses against the rod sleeve 22.

[0037] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tunnel wall deformation detection device, characterized in that, include: A number of fixed rods are fixedly installed at intervals along the tunnel circumference on the tunnel wall, and the axes of the multiple fixed rods are located in the same vertical section; The telescopic pole assembly comprises multiple sets, each set being positioned between two adjacent fixed poles. Each telescopic pole assembly includes a movable pole and a pole sleeve. The side wall of the pole sleeve has a first through groove, and a scale line is provided on the outside of the pole sleeve. One end of the movable pole is slidably inserted into one end of the pole sleeve, and a pointer is provided on the side wall of one end of the movable pole. The pointer is slidably positioned within the first through groove. The other end of the movable pole and the other end of the pole sleeve are rotatably connected to the ends of the adjacent fixed poles that extend out of the tunnel wall.

2. The tunnel wall deformation detection device as described in claim 1, characterized in that: The outer side wall of the sleeve is slidably fitted with a sleeve, and the side wall of the sleeve is provided with a second through groove aligned with the first through groove. The scale line is set on the outer side wall of the sleeve, and a hand-tightening bolt is threaded through the side wall of the sleeve. The axis of the hand-tightening bolt is perpendicular to the axis of the sleeve.

3. The tunnel wall deformation detection device as described in claim 2, characterized in that: The inner wall of the sleeve is fixedly provided with protrusions on both sides of the second through groove, and both protrusions are slidably embedded in the first through groove.

4. The tunnel wall deformation detection device as described in claim 3, characterized in that: The outer wall of one end of the movable rod is provided with a groove, a slider is slidably embedded in the groove, a compression spring is provided between the slider and the end wall of the groove, and the pointer is fixedly set on the end wall of the slider away from the compression spring.

5. The tunnel wall deformation detection device as described in any one of claims 2-4, characterized in that: It also includes a rotating shaft. The fixed rod extends out of the tunnel wall and is fixedly provided with two first connecting ears at intervals. The rotating shaft is rotatably passed through the two first connecting ears. The other end of the movable rod and the other end of the rod sleeve are respectively rotatably sleeved on the rotating shaft between the two first connecting ears. A target is provided at one end of the rotating shaft, and a first nut is threaded on the outer wall of the other end of the rotating shaft.

6. The tunnel wall deformation detection device as described in claim 5, characterized in that: It also includes a fastening bolt, two second connecting ears are fixedly provided at a distance from one end of the rotating shaft, a connecting block is fixedly provided on the end wall of the target, the fastening bolt is rotatably passed through the two second connecting ears, and the connecting block is rotatably sleeved on the fastening bolt between the two second connecting ears, wherein a second nut is fixedly provided on the outer side wall of one of the second connecting ears along the axial direction of the fastening bolt.

7. The tunnel wall deformation detection device as described in claim 6, characterized in that: An anti-slip pad is fixedly installed at one end of the hand-tightening bolt near the sleeve.

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