An auxiliary device for tunnel lining quality detection

Abstract

The utility model relates to tunnel engineering detection technical field discloses an auxiliary device for tunnel lining quality detection, including connecting rod, the outside screw thread connection of connecting rod has the bottom plate, the bottom fixed connection of bottom plate has universal wheel, the top fixed connection of bottom plate has the support, the outside of support is provided with detection mechanism, the top rotation connection of bottom plate has the runner, the top of bottom plate is provided with vibrating mechanism, detection mechanism includes slide, the outside slide connection of slide is in the outside of support, the outside screw thread connection of slide has the crossbeam, the outside slide connection of crossbeam has the pipe removal. In the utility model, through the connecting structure of connecting rod drive bottom plate, support and so on component assembly, make the device stable construction, provide reliable foundation for subsequent detection to realize efficient, comprehensive and accurate detection to tunnel lining quality, low in cost, adopt conventional sensor and mechanical structure, easy to promote.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering testing technology, and in particular to an auxiliary device for testing the quality of tunnel lining. Background Technology

[0002] As the main load-bearing component of a tunnel structure, the construction quality of tunnel lining directly affects the safety and service life of the tunnel. Currently, the demand for tunnel lining quality inspection is increasing both domestically and internationally, especially with the large-scale construction of high-speed railways and urban subways, which places higher demands on the accuracy and efficiency of lining quality inspection.

[0003] A search revealed Chinese Patent Publication No. CN203535217U, which discloses an auxiliary device for tunnel lining quality inspection. The device includes a bottom-mounted movable device with an adjustment mechanism. The top of the adjustment mechanism is connected to a support device, and the movable device also has a trolley handle. The movable device includes a movable platform with a groove in its center and a sliding block that moves along the groove. Rollers are installed on both sides of the movable platform. The support device includes a tray with tray rollers on both sides of its top. The bottom of the tray is connected to the adjustment mechanism. The tray also has a slot for securing a detection device. This invention can be used as an auxiliary device for radar-based tunnel lining quality inspection. During measurement, the radar equipment's antenna, ranging wheels, etc., are mounted on the support device. The height of the adjustment mechanism is then set as needed, and the movable device is pushed to perform the inspection. It has advantages such as simple operation, safety, convenience, and time and labor savings.

[0004] The aforementioned patent specification mentions that "as an auxiliary device for detecting the quality of tunnel lining using radar, during measurement, the antenna and ranging wheel of the radar equipment are installed on a supporting device, and then the height of the adjustment device is set as needed to push the moving device for detection; it has the advantages of simple operation, safety, convenience, time and labor saving." The above content can make radar equipment simple to operate, safe, convenient, time and labor saving, but tunnel lining quality detection requires many steps and different devices. Different devices require different stability and mobility of the support structure, which makes the detection equipment costly and complex to operate, making it difficult to quickly popularize on construction sites. Moreover, existing detection technologies have high requirements for the detection environment and poor adaptability. Therefore, an auxiliary device for tunnel lining quality detection is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an auxiliary device for tunnel lining quality inspection, aiming to improve the problems of high cost, complex operation, and difficulty in rapid popularization of some existing devices in the technology, as well as the high requirements of existing non-destructive testing technology for the testing environment and poor adaptability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An auxiliary device for tunnel lining quality inspection includes a connecting rod, a base plate externally threaded to the connecting rod, casters fixedly connected to the bottom of the base plate, a bracket fixedly connected to the top of the base plate, a detection mechanism externally mounted on the bracket, a rotating wheel rotatably connected to the top of the base plate, and a vibration mechanism externally mounted on the top of the base plate. The detection mechanism includes a slide block externally slidably connected to the outside of the bracket, a crossbeam externally threaded to the slide block, a sliding tube externally slidably connected to the outside of the crossbeam, a rotating shaft fixedly connected to the outside of the sliding tube, a support frame rotatably connected to the outside of the rotating shaft, a rangefinder mounted externally on the support frame, a fixed column fixedly connected to the outside of the sliding tube, an angle plate fixedly connected to the outside of the fixed column, a control rod fixedly connected to the outside of the support frame, and an adjustment assembly rotatably connected to the outside of the control rod. The above technical solution involves using casters to move the device to the detection position. In the detection mechanism, the slide block slides on the support, driving the crossbeam and the moving tube to adjust their height. The sliding cooperation between the crossbeam and the moving tube enables horizontal position adjustment. The rotating shaft on the moving tube allows the support frame to rotate. The control rod is used to operate the rotation of the support frame. When rotating, the angle dial on the fixed column is referenced, and the angle is fixed by the cooperation of the abutment rod and the adjusting nut in the adjustment assembly. Finally, the rangefinder on the support frame is placed in a suitable detection position. At the same time, the rotating wheel on the base plate and the tunnel lining contact auxiliary device move along the lining, and the vibration mechanism provides vibration signals for detection.

[0007] As a further description of the above technical solution: The vibration mechanism includes a support rod, the bottom of which is fixedly connected to the top of the base plate. A connecting plate is rotatably connected to the outside of the support rod, and a hammer wheel is rotatably connected to the other end of the connecting plate. A rotating seat is fixedly connected to the outside of the support rod, and a telescopic member is rotatably connected to the inside of the rotating seat. A connecting seat is rotatably connected to the other end of the telescopic member, and the connecting seat is fixedly connected to the outside of the connecting plate. Through the above technical solution: the telescopic component rotates and adjusts its angle within the rotating seat, and drives the connecting plate through the connecting seat. Since one end of the connecting plate is rotatably connected to the support rod, under the action of the telescopic component, it drives the hammer wheel at the other end to make a circular motion around the support rod. During the movement of the hammer wheel, it strikes the surface of the tunnel lining.

[0008] As a further description of the above technical solution: The bracket is externally threaded with an auxiliary component, and the slide is externally rotatably connected with a control component. With the above technical solution: when the slide slides along the bracket, the roller of the control component rolls inside the bracket, the tension button is used to fix the position, and the pointer moves with the slide and cooperates with the height plate of the auxiliary component to indicate the height.

[0009] As a further description of the above technical solution: The adjusting assembly includes a stop rod, which is rotatably connected to the outside of the control rod, and an adjusting nut is threaded onto the outside of the stop rod. The above technical solution involves operating the control rod to rotate the abutment rod, adjusting the angle of the support frame. During this process, the abutment rod can rotate relative to the control rod. Once the angle is adjusted to the correct position, the adjusting nut is rotated to move along the thread of the abutment rod and press it in place, thereby restricting the rotation of the abutment rod and fixing the position of the control rod and the support frame.

[0010] As a further description of the above technical solution: The abutment is slidably connected to the outside of the angle plate, and the adjusting nut is supported on the outside of the angle plate. The above technical solution involves the control lever driving the stop lever to slide on the angle plate, while the pointer moves on the height plate to indicate the height. Rotating the adjusting nut causes it to move along the thread of the stop lever and press against the angle plate.

[0011] As a further description of the above technical solution: The auxiliary component includes a height plate, the outside of which is formed on the outside of the bracket, and a top cover is threadedly connected to the top of the bracket; Through the above technical solution: the height plate of the auxiliary component provides a scale reference, the pointer on the slide indicates the height, and the top cover of the bracket limits the upward movement range of the slide.

[0012] As a further description of the above technical solution: The control component includes a roller, the roller being rotatably connected to the inside of the slide, a pointer being fixedly connected to the outside of the slide, and a tension button being threadedly connected to the outside of the slide. With the above technical solution: during adjustment, the slide slides along the bracket, and the roller of the control component rolls inside the bracket accordingly. The position of the slide can be fixed by the tension button.

[0013] As a further description of the above technical solution: The other end of the tension button is supported on the outside of the bracket, and the outside of the roller is slidably connected to the inside of the outside of the bracket; The above technical solution works as follows: when the slide slides along the bracket, the roller rolls inside the bracket to reduce frictional resistance. When a fixed position is required, the tension knob is rotated to press its end against the bracket surface, and the movement of the slide is restricted by friction to achieve position locking.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the connecting rod structure drives the assembly of components such as the base plate and support, making the device stable and providing a reliable foundation for subsequent testing. The universal wheel structure at the bottom of the base plate drives the entire device to move flexibly in the tunnel, facilitating quick access to different testing points and improving testing efficiency. The rotating control rod structure drives the support frame to rotate around the axis, and combined with the scale reference provided by the angle plate, the rangefinder can be adjusted at multiple angles, enabling the rangefinder to accurately measure data such as the thickness and surface flatness of the tunnel lining, ensuring the accuracy and reliability of the test results. Thus, it achieves efficient, comprehensive and accurate testing of the tunnel lining quality, with low cost, using conventional sensors and mechanical structures, and is easy to promote.

[0015] 2. In this utility model, the contact between the rotating wheel and the tunnel lining ensures that the device moves smoothly along the lining. The support rod provides stable support. The rotating seat and the connecting seat ensure flexible rotation and power transmission between the components. The telescopic component rotates around the rotating seat and its extension and retraction are controlled by the spring contraction. The connecting seat drives the connecting plate, causing the hammer wheel to make a circular motion and reciprocate to strike the surface of the tunnel lining. This solves the problem that traditional testing methods are difficult to effectively determine whether there are defects such as voids and cracks inside the tunnel lining. By detecting the lining's response to vibration, a more comprehensive and accurate judgment basis is provided for the quality inspection of the tunnel lining. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of an auxiliary device for detecting the quality of tunnel lining proposed in this utility model; Figure 2 This is a schematic diagram of the structure of the base plate of an auxiliary device for tunnel lining quality inspection proposed in this utility model; Figure 3 This is a schematic diagram of the structure of a rotary wheel for an auxiliary device for detecting the quality of tunnel lining, as proposed in this utility model. Figure 4 This is a schematic diagram of the crossbeam of an auxiliary device for detecting the quality of tunnel lining proposed in this utility model; Figure 5 This is a schematic diagram of the angle plate of an auxiliary device for detecting the quality of tunnel lining proposed in this utility model.

[0017] Legend: 1. Connecting rod; 2. Base plate; 3. Bracket; 4. Detection mechanism; 41. Slide seat; 42. Crossbeam; 43. Transfer tube; 44. Rotating shaft; 45. Support frame; 46. Control rod; 47. Fixed column; 48. Angle plate; 49. Adjustment assembly; 491. Support rod; 492. Adjusting nut; 410. Rangefinder; 5. Auxiliary assembly; 51. Height plate; 52. Top cover; 6. Control assembly; 61. Roller; 62. Pointer; 63. Tensioner button; 7. Rotary wheel; 8. Vibration mechanism; 81. Support rod; 82. Connecting plate; 83. Rotary seat; 84. Telescopic component; 85. Connecting seat; 86. Hammer wheel; 9. Universal wheel. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1 to 3 This utility model provides an embodiment of an auxiliary device for tunnel lining quality inspection, comprising a connecting rod 1 for assembly and connection, providing support and fixation. The connecting rod 1 is externally threaded to a base plate 2, which provides an installation surface. A caster wheel 9 is fixedly connected to the bottom of the base plate 2, enabling the device to move flexibly within the tunnel and facilitating the movement of the device to different inspection points by inspection personnel. A bracket 3 is fixedly connected to the top of the base plate 2, providing an installation and support structure. An inspection mechanism 4 is provided on the outside of the bracket 3. A rotating wheel 7 is rotatably connected to the top of the base plate 2, which is used to contact the tunnel lining, allowing the device to move along the lining. A vibration mechanism 8 is provided on the top of the base plate 2. Specifically, the tunnel lining quality inspection auxiliary device consists of multiple components. The connecting rod 1 serves as a connecting assembly component, which is connected to the base plate 2 via threads. The bottom of the base plate 2 is fixed with casters 9, and the top is fixed with a bracket 3 on one side and a rotating wheel 7 on the other side. A vibration mechanism 8 is also provided. An inspection mechanism 4 is set outside the bracket 3. In the overall device, the casters 9 facilitate movement inside the tunnel, the rotating wheel 7 can contact the lining, and the auxiliary device moves along the lining. All components cooperate with each other to form a complete inspection auxiliary device.

[0020] The detection mechanism 4 includes a slide 41, which allows for position adjustment along the height of the support 3. The slide 41 is externally slidably connected to the outside of the support 3. A crossbeam 42 is threadedly connected to the outside of the slide 41, connecting the slide 41 and the transfer tube 43. The position of the transfer tube 43 is adjusted horizontally. The transfer tube 43 is slidably connected to the outside of the crossbeam 42, sliding on the crossbeam 42 for further precise adjustment of the detection position. A rotating shaft 44 is fixedly connected to the outside of the transfer tube 43, allowing the support frame 45 to... The rangefinder 410 can rotate around the shaft 44 to achieve detection at different angles, adapting to the complex surface shape of the tunnel lining. The external rotatable connection of the shaft 44 is a support frame 45, which installs and fixes the rangefinder 410. Under the action of the adjustment component 49 and the control rod 46, the angle of the rangefinder 410 can be precisely adjusted and fixed. The rangefinder 410 is installed on the outside of the support frame 45. The rangefinder 410 measures the thickness, surface flatness and other relevant data of the tunnel lining to obtain the key data required for the quality inspection of the tunnel lining. Specifically, the detection mechanism 4 consists of multiple components. The slide 41 is fitted outside the bracket 3 and can slide along its height direction. The crossbeam 42 is threadedly connected to the outside of the slide 41. The moving tube 43 is slidably connected to the outside of the crossbeam 42. The rotating shaft 44 is fixed to the outside of the moving tube 43. The support frame 45 is rotatably connected to the rotating shaft 44. The rangefinder 410 is installed on the outside of the support frame 45. Through the cooperation of sliding, rotating and threaded connections between the components, the rangefinder 410 can be adjusted at different positions and angles.

[0021] The external fixed connection of the transfer tube 43 is a fixed column 47, which fixes the angle plate 48 and cooperates with the adjustment component 49 to provide support and reference for the precise adjustment and fixation of the angle of the support frame 45. The external fixed connection of the fixed column 47 is the angle plate 48, which serves as a scale reference for the angle adjustment of the support frame 45, accurately controlling and reading the rotation angle of the support frame 45, thereby precisely adjusting the detection angle of the rangefinder 410. The external fixed connection of the support frame 45 is a control rod 46, which is used to operate and control the rotation of the support frame 45, thereby adjusting the detection angle of the rangefinder 410. The external rotatable connection of the control rod 46 is the adjustment component 49. Specifically, a fixed column 47 is fixedly connected to the outside of the transfer tube 43, and an angle plate 48 is fixed to the outside of the fixed column 47. A control rod 46 is provided on the outside of the support frame 45, and an adjustment component 49 is rotatably connected to the outside of the control rod 46. In use, the support frame 45 is rotated by operating the control rod 46. During the process, the scale of the angle plate 48 can be referenced. At the same time, the adjustment component 49 cooperates with the fixed column 47 to achieve precise control of the rotation angle of the support frame 45.

[0022] The adjustment assembly 49 includes a stop rod 491, which is rotatably connected to the control rod 46. The other end of the stop rod 491 passes through the angle plate 48 and engages with the adjusting nut 492. The outside of the stop rod 491 is rotatably connected to the outside of the control rod 46. The outside of the stop rod 491 is threadedly connected to the adjusting nut 492. The adjusting nut 492 is threadedly connected to the stop rod 491. Rotating the adjusting nut 492 allows it to move axially along the stop rod 491. When the adjusting nut 492 is tightly pressed against the surface of the angle plate 48, friction is generated to lock the position of the stop rod 491, thereby fixing the angle of the rangefinder 410. The outside of the stop rod 491 is slidably connected to the outside of the angle plate 48, and the outside of the adjusting nut 492 is supported on the outside of the angle plate 48. Specifically, the adjustment assembly 49 consists of a stop rod 491 and an adjusting nut 492. One end of the stop rod 491 is rotatably connected to the control rod 46, and the other end passes through the angle plate 48. It has an external thread on its outer side. The adjusting nut 492 is threaded onto the outside of the stop rod 491. The stop rod 491 can slide on the angle plate 48, and the adjusting nut 492 can abut against the surface of the angle plate 48.

[0023] The support 3 is externally threaded with an auxiliary component 5, which includes a height plate 51. The surface of the height plate 51 is marked with height. The height plate 51 is externally opened on the support 3. The top of the support 3 is threaded with a top cover 52, which serves as a limit to prevent the slide 41 from moving excessively upward and detaching from the support 3. The slide 41 is externally rotatably connected with a control component 6, which includes a roller 61. The roller 61 reduces the movement resistance. The roller 61 is externally rotatably connected to the inside of the slide 41. The slide 41 is externally fixed with a pointer 62, which works in conjunction with the height plate 51 to provide a clear height indication and ensure the accuracy of the detection position. The slide 41 is externally threaded with a tension button 63. Rotating the tension button 63 can press or loosen its end on the surface of the support 3. The other end of the tension button 63 is supported on the outside of the support 3. The roller 61 is externally slidably connected to the inside of the support 3. Specifically, the bracket 3 is externally threaded to the auxiliary component 5. The height plate 51 of the auxiliary component 5 has height markings on its surface and is fitted over the bracket 3. The top cover 52 is threaded onto the top of the bracket 3. The slide 41 is externally provided with a control component 6, in which a roller 61 is rotatably connected to the inside of the slide 41 and slides inside the bracket 3. A pointer 62 is fixed on the outside of the slide 41 and threaded to a tension button 63. One end of the tension button 63 abuts against the surface of the bracket 3.

[0024] Reference Figures 1 to 3The vibration mechanism 8 includes a support rod 81, which is fixed to the base plate 2, serving as the support foundation for the entire vibration mechanism 8 and ensuring stable operation. The bottom of the support rod 81 is fixedly connected to the top of the base plate 2. A connecting plate 82 is rotatably connected to the outside of the support rod 81. One end of the connecting plate 82 is rotatably connected to the support rod 81, and the other end is rotatably connected to the hammer wheel 86, forming a linkage structure. The rotation of the connecting plate 82 drives the hammer wheel 86 to perform circular motion, realizing the impact vibration on the tunnel lining. The other end of the connecting plate 82 is rotatably connected to the hammer wheel 86. Driven by the telescopic component 84, the hammer wheel 86 reciprocates, causing the hammer wheel 86 to strike the surface of the tunnel lining, thereby detecting the impact vibration on the lining. The vibration response helps determine whether there are defects such as voids or cracks inside the lining. The support rod 81 is externally fixedly connected to a swivel 83, which provides a fulcrum for the telescopic component 84, allowing it to adjust its angle around the fixed point. The telescopic component 84 is rotatably connected inside the swivel 83. The telescopic component 84 contracts through a spring, thereby controlling the striking force of the hammer wheel 86. The other end of the telescopic component 84 is rotatably connected to a connecting seat 85, which connects the telescopic component 84 and the connecting plate 82 into a whole, ensuring that the driving force of the telescopic component 84 can be effectively transmitted to the connecting plate 82, driving the hammer wheel 86 to move. The connecting seat 85 is externally fixedly connected to the outside of the connecting plate 82. Specifically, in the vibration mechanism 8, the bottom of the support rod 81 is fixed to the top of the base plate 2, and the external part is rotatably connected to the connecting plate 82. The rotating seat 83 is fixed outside the support rod 81 and rotatably connected to the telescopic member 84 inside. The other end of the telescopic member 84 is connected to the connecting plate 82 through the connecting seat 85. The connecting seat 85 is fixed to the outside of the connecting plate 82, and the other end of the connecting plate 82 is rotatably connected to the hammer wheel 86. All components are connected to each other to form a structural system that can drive the hammer wheel 86 to move.

[0025] Working principle: During operation, the components are first assembled and connected via connecting rod 1. The casters 9 at the bottom of the base plate 2 allow the device to move flexibly within the tunnel. After moving the device to the detection point, the tension knob 63 on the outside of the slide 41 is rotated to control the tension between the roller 61 and the bracket 3, thereby adjusting the position of the slide 41 along the height direction of the bracket 3. The pointer 62 on the slide 41, in conjunction with the scale on the height plate 51 in the auxiliary component 5, determines the detection height. The top cover 52 prevents the slide 41 from moving excessively upwards, and the crossbeam 42... The external threaded connection of the slide block 41 provides a horizontal sliding structure. The moving tube 43 slides outside the crossbeam 42 to achieve precise adjustment of the detection position in the horizontal direction. If the detection angle of the rangefinder 410 needs to be adjusted, the control rod 46 is rotated to drive the support frame 45 to rotate around the rotating shaft 44. The angle plate 48 provides a scale reference. After the adjustment is completed, the adjusting nut 492 is rotated to make it abut against the angle plate 48 to lock the position of the stop rod 491 and fix the angle of the rangefinder 410. The rangefinder 410 measures the thickness, surface flatness and other data of the tunnel lining. In terms of vibration detection, the rotating wheel 7 on the top of the base plate 2 contacts the tunnel lining, and the device can move along the lining. In the vibration mechanism 8, the support rod 81 is fixed on the base plate 2 as a support, and the telescopic member 84 rotates around the rotating seat 83. The telescopic member is controlled by the contraction of the spring. Its other end is connected to the connecting plate 82 through the connecting seat 85. One end of the connecting plate 82 rotates around the support rod 81, and the other end drives the hammer wheel 86 to make a circular motion. The hammer wheel 86 swings back and forth under the drive of the telescopic member 84 to strike the surface of the tunnel lining. By detecting the response of the lining to vibration, it helps to determine whether there are defects such as voids and cracks inside the lining.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An auxiliary device for tunnel lining quality inspection, comprising a connecting rod (1), characterized in that: The connecting rod (1) is externally threaded to a base plate (2), the bottom of the base plate (2) is fixedly connected to a caster wheel (9), the top of the base plate (2) is fixedly connected to a bracket (3), a detection mechanism (4) is provided on the outside of the bracket (3), a rotating wheel (7) is rotatably connected to the top of the base plate (2), and a vibration mechanism (8) is provided on the top of the base plate (2). The detection mechanism (4) includes a slide (41), which is slidably connected to the outside of the bracket (3). A crossbeam (42) is threadedly connected to the outside of the slide (41). A moving tube (43) is slidably connected to the outside of the crossbeam (42). A rotating shaft (44) is fixedly connected to the outside of the moving tube (43). A support frame (45) is rotatably connected to the outside of the rotating shaft (44). A rangefinder (410) is installed on the outside of the support frame (45). A fixed column (47) is fixedly connected to the outside of the moving tube (43). An angle plate (48) is fixedly connected to the outside of the fixed column (47). A control rod (46) is fixedly connected to the outside of the support frame (45). An adjustment component (49) is rotatably connected to the outside of the control rod (46).

2. The auxiliary device for tunnel lining quality inspection according to claim 1, characterized in that: The vibration mechanism (8) includes a support rod (81), the bottom of which is fixedly connected to the top of the base plate (2). A connecting plate (82) is rotatably connected to the outside of the support rod (81). A hammer wheel (86) is rotatably connected to the other end of the connecting plate (82). A rotating seat (83) is fixedly connected to the outside of the support rod (81). A telescopic member (84) is rotatably connected to the inside of the rotating seat (83). A connecting seat (85) is rotatably connected to the other end of the telescopic member (84). The connecting seat (85) is fixedly connected to the outside of the connecting plate (82).

3. The auxiliary device for tunnel lining quality inspection according to claim 1, characterized in that: The bracket (3) is externally threaded with an auxiliary component (5), and the slide (41) is externally rotatably connected with a control component (6).

4. The auxiliary device for tunnel lining quality inspection according to claim 1, characterized in that: The adjusting assembly (49) includes a stop rod (491), which is externally rotatably connected to the outside of the control rod (46), and an adjusting nut (492) is externally threaded onto the stop rod (491).

5. An auxiliary device for detecting the quality of tunnel lining according to claim 4, characterized in that: The abutment rod (491) is externally slidably connected to the outside of the angle plate (48), and the adjusting nut (492) is externally supported on the outside of the angle plate (48).

6. An auxiliary device for detecting the quality of tunnel lining according to claim 3, characterized in that: The auxiliary component (5) includes a height plate (51), the outside of which is opened on the outside of the bracket (3), and the top of the bracket (3) is threadedly connected to a top cover (52).

7. An auxiliary device for tunnel lining quality inspection according to claim 3, characterized in that: The control component (6) includes a roller (61), the outside of which is rotatably connected to the inside of the slide (41), a pointer (62) is fixedly connected to the outside of the slide (41), and a tension button (63) is threadedly connected to the outside of the slide (41).

8. An auxiliary device for detecting the quality of tunnel lining according to claim 7, characterized in that: The other end of the tension button (63) is supported on the outside of the bracket (3), and the outside of the roller (61) is slidably connected to the outside of the bracket (3).

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