Performance detection device for tunnel waterproof layer

Abstract

The invention provides a tunnel waterproof layer performance detection device, and relates to the technical field of tunnel construction, the tunnel waterproof layer performance detection device comprises a base, an advancing mechanism, a detection mechanism and an indication mechanism, an arc-shaped slide rail is arranged on the base, and the advancing mechanism comprises a mounting seat slidably arranged on the arc-shaped slide rail and a driving assembly used for driving the mounting seat to slide; the detection mechanism comprises a detection seat, an air blowing assembly and a water spraying assembly, the detection seat is rotationally arranged on the mounting seat, the air blowing assembly is used for blowing compressed air to the connecting part of the two adjacent waterproof layers, and the water spraying assembly is used for spraying display liquid to the connecting part of the two adjacent waterproof layers; the indicating mechanism comprises a bottom frame and a top frame, the bottom frame is fixed on the base, the top frame is fixedly connected with the bottom frame through a plurality of connecting rods, a plurality of indicating parts are arranged on the top frame, and when the blowing assembly blows compressed air to a gap of the connecting part of the waterproof layer and enables the waterproof layer to bulge, the indicating parts can indicate the bulge part. The detection efficiency can be improved, and meanwhile the labor intensity of workers is reduced.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and more specifically, to a device for testing the performance of tunnel waterproofing layers. Background Technology

[0002] During tunnel construction, to prevent water leakage, waterproof membranes are typically laid on the inner walls of the tunnel after the initial support. The waterproof membrane is laid along the tunnel arch from one side of the ground to the other. Adjacent waterproof membranes are connected by overlapping. Heat fusion is usually used to connect adjacent membranes; however, if there are any gaps after the connection, it will affect the overall performance of the tunnel's waterproof layer, resulting in leaks still existing in the tunnel.

[0003] For performance testing of tunnel waterproofing layers, the connection line after the thermal fusion of two adjacent waterproofing membranes is the key point of inspection. Current testing methods involve visual inspection by workers or using an inflation tool to first inflate the waterproofing layer and then locate leaks. Workers need to conduct the inspection gradually along the tunnel's arched roof, resulting in low efficiency and high labor intensity. Summary of the Invention

[0004] The purpose of this invention is to provide a tunnel waterproofing layer performance testing device, which can conveniently detect air leakage points, improve testing efficiency, and reduce manual labor intensity.

[0005] This invention is achieved through the following technical solution: a tunnel waterproofing layer performance testing device, comprising: a base, with rollers provided at the bottom of the base and an arc-shaped slide rail provided on the base; a traveling mechanism, comprising a mounting seat slidably disposed on the arc-shaped slide rail and a driving component for driving the mounting seat to slide along the arc-shaped slide rail; and a testing mechanism, comprising a testing seat, an air blowing component, and a water spraying component, wherein the testing seat is rotatably disposed on the mounting seat, and a first testing rod and a second testing rod are provided on the testing seat; the air blowing component and the water spraying component are respectively located at both ends of the testing seat and respectively overlap the mounting seat. On the first and second detection rods, the air blowing assembly is used to blow compressed air into the connection between two adjacent waterproof layers, and the water spraying assembly is used to spray indicator liquid into the connection between two adjacent waterproof layers; and an indicating mechanism is provided, the indicating mechanism including a base frame and a top frame, the base frame being fixedly mounted on a base, the top frame being mounted outside the base frame and fixedly connected to the base frame by multiple connecting rods, the top frame being provided with multiple indicating components, when the air blowing assembly blows compressed air into the gap at the connection of the waterproof layers and causes the waterproof layers to bulge, the indicating components can indicate the bulging part.

[0006] Furthermore, the air blowing assembly includes an air compressor, an air pipe, and an air blowing head; the water spraying assembly includes a liquid storage tank, an infusion pump, a water pipe, and a water spray head; the first detection rod is provided with a first limiting seat for limiting the position of the air pipe and a first support seat for supporting the air blowing head; the second detection rod is provided with a second limiting seat for limiting the position of the water pipe and a second support seat for supporting the water spray head.

[0007] Furthermore, both the first and second detection rods include a base rod, a top rod, and a compression spring. The base rod is fixedly connected to the detection seat, and a mounting hole is provided at the top of the base rod. The top rod is slidably disposed in the mounting hole, and the compression spring is connected between the top rod and the bottom wall of the mounting hole. A spherical abutment block for adhering to the waterproof layer is provided at the end of the top rod away from the base rod.

[0008] Furthermore, a marking assembly is provided on the top rod of the second detection rod. The marking assembly is located on one side of the top rod and can move towards the surface of the waterproof layer to make a mark at the gap in the waterproof layer.

[0009] Furthermore, the top rod of the second detection rod includes a fixed part and a flipping part. The top of the fixed part is provided with a hinge seat, and the bottom of the flipping part is provided with a hinge block and is hinged to the fixed part through the hinge block.

[0010] The marking assembly includes a fork arm inclinedly disposed on one side of the flipping part, a marking pen disposed at the top of the fork arm, a support rod disposed on one side of the hinge seat, and a flipping electric cylinder disposed on the support rod for driving the fork arm and the flipping part to flip simultaneously.

[0011] Furthermore, there is a gap between the marking pen and the waterproof layer, and the flipping electric cylinder drives the fork arm to flip, so that the marking pen comes into contact with the waterproof layer and can draw marking lines on the waterproof layer.

[0012] Furthermore, the mounting base is provided with a rotating assembly for driving the detection seat to rotate to switch the relative positions of the air blowing assembly and the water spraying assembly. The rotating assembly includes a rotating motor, a worm gear, and a worm. The mounting base is provided with two mounting blocks. The worm is rotatably disposed between the two mounting blocks. The rotating motor is fixedly disposed on one of the mounting blocks and can drive the worm to rotate. The bottom of the detection seat is provided with a rotating shaft. The worm gear is coaxially connected to the rotating shaft and meshes with the worm.

[0013] Furthermore, the top frame includes an inner support, an outer support, and multiple connecting columns connecting the inner support and the outer support; the indicating component includes an indicating rod with two magnetic pieces on it. When the indicating rod slides towards the outer support, one of the magnetic pieces can be attracted to the outer support, and when the indicating rod slides towards the inner support, the other magnetic piece can be attracted to the inner support.

[0014] Furthermore, the indicating component also includes an indicator light. The inner bracket has a blind hole on the side facing the outer bracket for the magnetic attracting piece to enter. A touch switch is provided in the blind hole. When the magnetic attracting piece is attracted to the inner bracket, it can abut against the touch switch and turn on the indicator light.

[0015] Furthermore, the indicator rod is a hollow rod, and the top of the indicator rod is provided with an arc-shaped abutment surface.

[0016] The technical solution of the present invention has at least the following advantages and beneficial effects: 1. This invention uses an air blowing component to blow compressed air into the connection between two adjacent waterproof layers, causing the gap at the connection to bulge. Then, an indicator mechanism indicates the location and range of the gap, and a water spraying component sprays a display liquid into the connection between the two adjacent waterproof layers to determine the specific location of the gap and facilitate subsequent repairs.

[0017] 2. The present invention configures a marking component on the top rod of the second detection rod. The marking component can move towards the surface of the waterproof layer and mark the position of the gap in the waterproof layer, so that the staff can quickly find the position of the gap when repairing the waterproof layer after the inspection process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the usage state of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the detection mechanism and rotating assembly of the present invention; Figure 4 This is a schematic diagram of the air blowing assembly and the first detection rod of the present invention; Figure 5 This is a schematic diagram of the structure of the water spray assembly and the second detection rod of the present invention; Figure 6 This is a schematic diagram of the structure of the indicating mechanism of the present invention; Figure 7 This is a schematic diagram of the structure of the top frame and the indicating component of the present invention; Figure 8 for Figure 7 Enlarged view of part A; Reference numerals: 1-base, 11-roller, 12-arc slide rail, 2-traveling mechanism, 21-mounting seat, 211-mounting block, 22-drive assembly, 23-rotating assembly, 231-rotating motor, 212-worm gear, 233-worm, 3-detection mechanism, 31-detection seat, 311-rotating shaft, 32-air blowing assembly, 321-air compressor, 322-air pipe, 323-air blowing head, 33-water spray assembly, 331-liquid storage tank, 332-infusion pump, 333-water pipe, 334-water spray head, 34-first detection rod, 341-first limit seat, 342-first support seat, 35-second detection rod, 351 - Second limit seat, 352- Second support seat, 361- Bottom rod, 362- Top rod, 3621- Fixing part, 3622- Flipping part, 3623- Hinge seat, 3624- Hinge block, 3625- Support rod, 363- Compression spring, 364- Spherical abutment block, 37- Marking assembly, 371- Fork arm, 372- Marker pen, 373- Flipping electric cylinder, 4- Indicator mechanism, 41- Base frame, 42- Top frame, 421- Inner support, 422- Outer support, 423- Connecting column, 43- Connecting rod, 44- Indicator component, 441- Indicator rod, 442- Magnetic suction piece, 443- Indicator light, 4431- Touch switch. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] Example The following is for reference Figures 1-8 As shown in the illustration, and further explained with reference to specific embodiments, this embodiment provides a device for testing the performance of a tunnel waterproofing layer. Figure 1 , Figure 2As shown, the system includes a base 1, a traveling mechanism 2, a detection mechanism 3, and an indicating mechanism 4. The base 1 has rollers 11 at its bottom and an arc-shaped slide rail 12 on its surface. The traveling mechanism 2 includes a mounting seat 21 slidably mounted on the arc-shaped slide rail 12 and a drive assembly 22 for driving the mounting seat 21 to slide along the arc-shaped slide rail 12. The detection mechanism 3 is mounted on the traveling mechanism 2, and the indicating mechanism 4 is mounted on the base 1. The arc of the arc-shaped slide rail 12 is adapted to the shape of the tunnel's arched top surface. By driving the mounting seat 21 along the length of the arc-shaped slide rail 12 via the drive assembly 22, the detection mechanism 3 can move along the tunnel's arched top surface. Since the waterproofing layer is also installed along the tunnel's arched top surface, the detection mechanism 3 can detect the connection points between two adjacent waterproofing layers. When the detection mechanism 3 detects a gap, the indicating mechanism 4 can indicate the gap.

[0022] Reference Figure 3 As shown, the detection mechanism 3 includes a detection seat 31, an air blowing assembly 32, and a water spraying assembly 33. The detection seat 31 is rotatably mounted on the mounting base 21. A first detection rod 34 and a second detection rod 35 are provided on the detection seat 31. The air blowing assembly 32 and the water spraying assembly 33 are located at both ends of the detection seat 31 and are respectively attached to the first detection rod 34 and the second detection rod 35. The air blowing assembly 32 is used to blow compressed air into the connection between two adjacent waterproof layers. The water spraying assembly 33 is used to spray an indicator liquid into the connection between two adjacent waterproof layers. When compressed air is blown into the gap at the connection of the waterproof layers and causes the waterproof layers to bulge, the indicating mechanism 4 can indicate the bulging part, thereby determining the range of the gap at the connection of the waterproof layers. Then, the indicator liquid is sprayed into the gap range by the water spraying assembly 33 to determine the specific location of the gap.

[0023] Reference Figure 3 , Figure 4 and Figure 5As shown, the air blowing assembly 32 includes an air compressor 321, an air pipe 322, and an air blowing head 323. The water spraying assembly 33 includes a liquid storage tank 331, an infusion pump 332, a water pipe 333, and a water spray head 334. The first detection rod 34 is provided with a first limiting seat 341 for limiting the position of the air pipe 322 and a first support seat 342 for supporting the air blowing head 323. The second detection rod 35 is provided with a second limiting seat 351 for limiting the position of the water pipe 333 and a second support seat 352 for supporting the water spray head 334. In the initial state, the air blower 323 is directed towards the connection point of the waterproof layer, and the air compressor 321 is turned on to deliver high-pressure air to the air blower 323. When there is a gap at the connection point of the waterproof layer, the high-pressure air can enter through the gap and cause the waterproof layer to bulge. The indicating mechanism 4 indicates the range of the bulging position. Then, the detection seat 31 is rotated 180° so that the spray head 334 is directed towards the connection point of the waterproof layer. The infusion pump 332 is turned on to deliver the display liquid in the storage tank 331 from the spray head 334 to the connection point of the waterproof layer. Then, the drive assembly 22 drives the mounting seat 21 to move in the opposite direction a certain distance. When the display liquid is sprayed onto the gap at the connection point of the waterproof layer, it can accurately indicate the gap, thus making it easier for workers to accurately find the leak point and facilitate subsequent repairs. In this embodiment, the display liquid is soapy water. When the soapy water is sprayed onto the gap, the gas escaping from the gap can generate bubbles at the sprayed area, thus making it easier for workers to observe.

[0024] Reference Figure 3 As shown, the mounting base 21 is provided with a rotating component 23 for driving the detection base 31 to rotate to switch the relative positions of the air blowing component 32 and the water spraying component 33. The rotating component 23 includes a rotating motor 231, a worm gear 212 and a worm 233. The mounting base 21 is provided with two mounting blocks 211. The worm 233 is rotatably disposed between the two mounting blocks 211. The rotating motor 231 is fixedly disposed on one of the mounting blocks 211 and can drive the worm 233 to rotate. The bottom of the detection base 31 is provided with a rotating shaft 311. The worm gear 212 is coaxially connected to the rotating shaft 311 and meshes with the worm 233. The starting motor 231 drives the worm 233 to rotate, and the worm wheel 212 rotates synchronously under the meshing action of the worm 233, thereby driving the detection seat 31 to rotate, so as to switch the relative positions of the air blowing assembly 32 and the water spraying assembly 33. Since the meshing action of the worm wheel 212 and the worm 233 has a self-locking function, the detection seat 31 has high stability after rotation.

[0025] Reference Figure 4 , Figure 5As shown, both the first detection rod 34 and the second detection rod 35 include a base rod 361, a top rod 362, and a compression spring 363. The base rod 361 is fixedly connected to the detection seat 31, and a mounting hole is provided at the top of the base rod 361. The top rod 362 is slidably disposed in the mounting hole, and the compression spring 363 is connected between the top rod 362 and the bottom wall of the mounting hole, so that the lengths of both the first detection rod 34 and the second detection rod 35 can be adjusted to adapt to the shape of the tunnel arched roof. The end of the top rod 362 away from the base rod 361 is provided with a spherical abutment block 364 for adhering to the waterproof layer, so as to avoid excessive friction between the top rod 362 and the tunnel arched roof, which could cause jerking during movement or wear of the waterproof membrane.

[0026] Reference Figure 3 , Figure 5 As shown, a marking assembly 37 is provided on the top rod 362 of the second detection rod 35. The marking assembly 37 is located on one side of the top rod 362. The marking assembly 37 can move towards the surface of the waterproof layer and make marks at the gaps in the waterproof layer, so that the staff can quickly find the gaps when repairing the waterproof layer after the inspection process.

[0027] Reference Figure 5 As shown, the top rod 362 of the second detection rod 35 includes a fixing part 3621 and a flipping part 3622. A hinge seat 3623 is welded to the top of the fixing part 3621, and a hinge block 3624 for hinged with the hinge seat 3623 is welded to the bottom of the flipping part 3622. The drawing assembly 37 includes a fork arm 371 inclinedly disposed on one side of the flipping part 3622. A marker pen 372 is disposed at the top of the fork arm 371. A support rod 3625 is disposed on one side of the hinge seat 3623. A flipping electric cylinder 373 is disposed on the support rod 3625 for driving the fork arm 371 and the flipping part 3622 to flip simultaneously. Before the flipping electric cylinder 373 drives the fork arm 371 to flip, there is a gap between the marker pen 372 and the waterproof layer. After the flipping electric cylinder 373 drives the fork arm 371 to flip, the marker pen 372 contacts the waterproof layer and can draw a marking line on the waterproof layer. When the water spraying component 33 sprays soapy water and bubbles are generated at the joint of the waterproof layer, the flipping cylinder 373 is activated to drive the fork arm 371 and the flipping part 3622 to flip simultaneously. The marking pen 372 can make a mark on the waterproof layer during the flipping process with the fork arm 371, so that the staff can quickly find the location of the gap at the joint of the waterproof layer in the subsequent repair work.

[0028] Reference Figure 6As shown, the indicating mechanism 4 includes a base frame 41 and a top frame 42. The base frame 41 is fixedly mounted on the base 1, and the top frame 42 is located outside the base frame 41 and is fixedly connected to the base frame 41 by multiple connecting rods 43. Multiple indicating components 44 are provided on the top frame 42. When the air blowing assembly 32 blows compressed air to the gap at the joint of the waterproof layer and causes the waterproof layer to bulge, the indicating components 44 can indicate the bulging part, so that the staff can quickly find the range of gaps at the joint of the waterproof layer, which is convenient for further searching for the accurate location of the gap.

[0029] Reference Figure 7 , Figure 8 As shown, the top frame 42 includes an inner support 421, an outer support 422, and multiple connecting columns 423 connecting the inner support 421 and the outer support 422; the indicating component 44 includes an indicating rod 441, which is a hollow rod with an arc-shaped abutment surface at its top to facilitate contact with the waterproof layer of the tunnel arch roof. Two magnetic plates 442 are provided on the indicating rod 441. When the indicating rod 441 slides towards the outer support 422, one magnetic plate 442 can be attracted to the outer support 422; when the indicating rod 441 slides towards the inner support 421, the other magnetic plate 442 can be attracted to the inner support 421. In the initial state, the magnetic piece 442 on the side of the indicator rod 441 near the outer bracket 422 is in an attracted state with the outer bracket 422. When compressed air is filled into the gap at the joint of the waterproof layer, it will bulge, thereby applying pressure to the indicator rod 441 to separate the magnetic piece 442 from the outer bracket 422. Then, another magnetic piece 442 on the indicator rod 441 is attracted to the inner bracket 421. The change in the position of the indicator rod 441 can provide guidance to the staff, thereby enabling them to determine the approximate range of gaps at the joint of the waterproof layer.

[0030] Reference Figure 8 As shown, in order to further facilitate the staff to observe whether the position of the indicator rod 441 has changed, the indicator component 44 also includes an indicator light 443. The inner bracket 421 has a blind hole on the side facing the outer bracket 422 for the magnetic piece 442 to enter. A touch switch 4431 is provided in the blind hole. When the magnetic piece 442 is attracted to the inner bracket 421, it can abut against the touch switch 4431 and turn on the indicator light 443. After the indicator light 443 lights up, the staff can more directly judge whether the position of the indicator rod 441 has changed.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for testing the performance of a tunnel waterproofing layer, characterized in that, include: A base (1) is provided with a roller (11) at the bottom of the base (1) and an arc-shaped slide rail (12) is provided on the base (1); The traveling mechanism (2) includes a mounting base (21) slidably disposed on an arc-shaped slide rail (12) and a driving assembly (22) for driving the mounting base (21) to slide along the arc-shaped slide rail (12); The testing mechanism (3) includes a testing seat (31), an air blowing assembly (32), and a water spraying assembly (33). The testing seat (31) is rotatably mounted on a mounting base (21). A first testing rod (34) and a second testing rod (35) are provided on the testing seat (31). The air blowing assembly (32) and the water spraying assembly (33) are located at both ends of the testing seat (31) and respectively overlap the first testing rod (34) and the second testing rod (35). The air blowing assembly (32) is used to blow compressed air into the connection between two adjacent waterproof layers. The water spraying assembly (33) is used to spray display liquid into the connection between two adjacent waterproof layers. And an indicator mechanism (4), the indicator mechanism (4) includes a base frame (41) and a top frame (42). The base frame (41) is fixedly mounted on the base (1). The top frame (42) is mounted outside the base frame (41) and is fixedly connected to the base frame (41) by multiple connecting rods (43). Multiple indicator components (44) are provided on the top frame (42). When the air blowing assembly (32) blows compressed air into the gap of the waterproof layer connection and causes the waterproof layer to bulge, the indicator components (44) can indicate the bulging part.

2. The tunnel waterproofing layer performance testing device according to claim 1, characterized in that, The air blowing assembly (32) includes an air compressor (321), an air pipe (322), and an air blowing head (323). The water spray assembly (33) includes a liquid storage tank (331), an infusion pump (332), a water pipe (333), and a water spray head (334). The first detection rod (34) is provided with a first limiting seat (341) for limiting the position of the air pipe (322) and a first support seat (342) for supporting the air blowing head (323). The second detection rod (35) is provided with a second limiting seat (351) for limiting the position of the water pipe (333) and a second support seat (352) for supporting the water spray head (334).

3. The tunnel waterproofing layer performance testing device according to claim 1, characterized in that, The first detection rod (34) and the second detection rod (35) both include a bottom rod (361), a top rod (362) and a compression spring (363). The bottom rod (361) is fixedly connected to the detection seat (31). The top of the bottom rod (361) is provided with a mounting hole. The top rod (362) is slidably disposed in the mounting hole. The compression spring (363) is connected between the top rod (362) and the bottom wall of the mounting hole. The end of the top rod (362) away from the bottom rod (361) is provided with a spherical abutment block (364) for adhering to the waterproof layer.

4. The tunnel waterproofing layer performance testing device according to claim 3, characterized in that, The top rod (362) of the second detection rod (35) is equipped with a marking assembly (37). The marking assembly (37) is located on one side of the top rod (362). The marking assembly (37) can move towards the surface of the waterproof layer and make a mark at the gap of the waterproof layer.

5. The tunnel waterproofing layer performance testing device according to claim 4, characterized in that, The top rod (362) of the second detection rod (35) includes a fixed part (3621) and a flipping part (3622). The top of the fixed part (3621) is provided with a hinge seat (3623), and the bottom of the flipping part (3622) is provided with a hinge block (3624) and is hinged to the fixed part (3621) through the hinge block (3624). The line drawing assembly (37) includes a fork arm (371) inclinedly disposed on one side of the flipping part (3622), a marker pen (372) is disposed at the top of the fork arm (371), a support rod (3625) is disposed on one side of the hinge seat (3623), and a flipping electric cylinder (373) is disposed on the support rod (3625) for driving the fork arm (371) and the flipping part (3622) to flip simultaneously.

6. The tunnel waterproofing layer performance testing device according to claim 5, characterized in that, There is a gap between the marker pen (372) and the waterproof layer. The flipping electric cylinder (373) drives the fork arm (371) to flip, so that the marker pen (372) contacts the waterproof layer and can draw marking lines on the waterproof layer.

7. The tunnel waterproofing layer performance testing device according to claim 1, characterized in that, The mounting base (21) is provided with a rotating component (23) for driving the detection base (31) to rotate to switch the relative positions of the air blowing component (32) and the water spraying component (33). The rotating component (23) includes a rotating motor (231), a worm gear (212) and a worm (233). The mounting base (21) is provided with two mounting blocks (211). The worm (233) is rotatably disposed between the two mounting blocks (211). The rotating motor (231) is fixedly disposed on one of the mounting blocks (211) and can drive the worm (233) to rotate. The bottom of the detection base (31) is provided with a rotating shaft (311). The worm gear (212) is coaxially connected to the rotating shaft (311) and meshes with the worm (233).

8. The tunnel waterproofing layer performance testing device according to claim 1, characterized in that, The top frame (42) includes an inner support (421), an outer support (422), and multiple connecting columns (423) connecting the inner support (421) and the outer support (422); the indicating component (44) includes an indicating rod (441), on which two magnetic pieces (442) are provided. When the indicating rod (441) slides toward the outer support (422), one of the magnetic pieces (442) can be attracted to the outer support (422), and when the indicating rod (441) slides toward the inner support (421), the other magnetic piece (442) can be attracted to the inner support (421).

9. The tunnel waterproofing layer performance testing device according to claim 8, characterized in that, The indicator component (44) also includes an indicator light (443). The inner bracket (421) has a blind hole on the side facing the outer bracket (422) for the magnetic locating piece (442) to enter. A touch switch (4431) is provided in the blind hole. When the magnetic locating piece (442) is attracted to the inner bracket (421), it can abut against the touch switch (4431) and turn on the indicator light (443).

10. The tunnel waterproofing layer performance testing device according to claim 8, characterized in that, The indicator rod (441) is a hollow rod, and the top of the indicator rod (441) is provided with an arc-shaped contact surface.

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