Tunnel face perpendicularity detection device and detection method

Abstract

The invention discloses a tunnel face verticality detection device, and relates to the field of tunnel construction measurement technology, the tunnel face verticality detection device comprises a laser measuring instrument and a support frame, the support frame comprises a support table and a plurality of support rods; when the supporting rod is used, the upper end of the supporting rod is used for abutting against the top wall of a tunnel, the lower end of the supporting rod is used for abutting against the bottom face of the tunnel, the supporting rod comprises a main rod, screw rods are in threaded connection with the two ends of the main rod, a sliding guide piece is jointly connected between the two screw rods, and a supporting piece is arranged at the middle point of the main rod. The thread turning directions of the screw rods located at the two ends of the supporting rod are opposite, and the multiple supporting pieces are used for jointly erecting the supporting table; the laser measuring instrument is installed on the supporting table, a lifting adjusting piece is connected between the supporting table and the laser measuring instrument, and the lifting adjusting piece is used for adjusting the height position of the laser measuring instrument. According to the invention, the measurement precision of the verticality of the tunnel face can be improved.

Description

Technical Field

[0001] The present application relates to the field of tunnel construction measurement technology, and in particular to a tunnel face verticality detection device and detection method. Background Art

[0002] The face is the interface between the excavated and unexcavated rock layers. In tunnel construction, the face is the working face that is constantly moving forward and is the frontier that is constantly advancing during the excavation process.

[0003] The verticality of the tunnel face has a great influence on the accuracy of the tunnel excavation trajectory. In order to control the accuracy of the tunnel excavation path, it is necessary to control the verticality of the tunnel face. Generally, when measuring the verticality of geometric elements, it is necessary to base it on a certain measurement benchmark. The measurement benchmark of the verticality of the tunnel face is usually the bottom surface of the already formed tunnel. However, as a three-dimensional structure, the tunnel only uses the bottom surface of the tunnel as the measurement benchmark for measuring the verticality of the tunnel face, which makes it difficult to accurately measure the verticality of the tunnel face. Summary of the invention

[0004] In order to more accurately measure the verticality of a tunnel face, the present application provides a tunnel face verticality detection device and detection method.

[0005] The present application provides a tunnel face verticality detection device and detection method using the following technical solutions: A tunnel face verticality detection device comprises a laser measuring instrument and a support frame, wherein the support frame comprises a support platform and a plurality of support rods; when the support rods are in use, the upper ends are used to abut against the top wall of the tunnel, and the lower ends are used to abut against the bottom surface of the tunnel; the support rods comprise a main rod, both ends of the main rod are threadedly connected with screw rods, a sliding guide is commonly connected between the two screw rods, a support member is provided at the midpoint of the main rod, the screw rods at both ends of the support rod have opposite thread rotation directions, and a plurality of support members are used to jointly erect the support platform; the laser measuring instrument is mounted on the support platform, a lifting and lowering adjustment member is connected between the support platform and the laser measuring instrument, and the lifting and lowering adjustment member is used to adjust the height position of the laser measuring instrument.

[0006] By adopting the above technical solution, when using the detection device to detect the verticality of the tunnel, multiple support rods of the detection device are installed in the tunnel that has been excavated along the center line of the tunnel bottom surface, so that the screw at one end of the support rod is pressed against the tunnel bottom surface, and the screw at the other end is pressed against the top wall of the tunnel. Then the support platform is installed on the support members of the multiple support rods, and the laser measuring instrument is installed on the support platform through the lifting and adjusting member. Then the distance from the laser measuring instrument to the tunnel face is measured. In this process, the height position of the laser measuring instrument is changed by the lifting and adjusting member, and the distance from the laser measuring instrument to the tunnel face at different height positions is measured. Combined with the height data of the laser measuring instrument, the inclination of the tunnel face is measured.

[0007] In the present application, since the screw rods at both ends of the support rod are coaxially slidably connected, the screw rods at both ends of the support rod can be synchronously spirally extended and retracted, so that when the support rod is installed at the center line of the bottom surface of the tunnel, the center line of each support rod can be consistent with the central axis of the tunnel. In the case where the support member is installed at the center of the support rod, the support platform installed on each support member can be used as a reference for the laser measuring instrument to measure the verticality of the tunnel face, which is conducive to improving the measurement accuracy of the verticality of the tunnel face.

[0008] Optionally, a control module is further included, wherein the control module is used to obtain data from the laser measuring instrument and calculate the verticality of the tunnel face according to the data from the laser measuring instrument.

[0009] By adopting the above technical solution, the control module can obtain the measurement data signal generated by the laser measuring instrument. The control module is preset with a program that can calculate the verticality of the tunnel face and the tunnel centerline, making the verticality of the tunnel face easier to calculate.

[0010] Optionally, one of the two screw rods is a lower screw rod, and the other is an upper screw rod, and a limiting notch is provided at one end of the lower screw rod away from the support rod; the support frame also includes a serial connecting rod, and each support rod is plugged into the serial connecting rod through the limiting notch.

[0011] By adopting the above technical solution, each support rod is connected in series by the connecting rod, so that each support rod can be kept on the center line of the tunnel bottom surface as much as possible. In the process of adjusting the length of the support rod by spiral rotation, the lower screw rod is limited by the connecting rod, making it easier to adjust the length of the support rod.

[0012] Optionally, the screw rod is a solid rod, a guide groove is provided on the circumference of the screw rod, the guide groove is penetrated and arranged close to one end of the support rod, and the sliding guide member passes through the guide grooves of the two screw rods at the same time.

[0013] By adopting the above technical solution, the two screw rods are slidably connected with the sliding guide member through the guide groove.

[0014] Optionally, one end of the upper screw rod away from the support rod is detachably connected to a hard alloy piece, and a side of the hard alloy piece away from the upper screw rod is provided with a plurality of spike protrusions, and the plurality of spike protrusions are used to abut against the top wall of the tunnel.

[0015] By adopting the above technical solution, the upper end of the upper screw rod abuts against the top wall of the tunnel through the spiked protrusion of the carbide part, which is beneficial to increase the friction between the upper screw rod and the top wall of the tunnel, making it difficult for the upper screw rod to slide relative to the top wall of the tunnel, which is beneficial to improving the stability of the support rod installation state.

[0016] Optionally, the support member is a round rod, and both ends of the round rod respectively extend out of the outer circumferential surface of the support rod; the support platform includes two support plates parallel to each other, each support rod is located between the two support plates, and the lower surfaces of the two support plates respectively abut against the two ends of the round rod, the support plates are ferromagnetic, and the two support plates are commonly connected to a magnetic part, and the magnetic part is magnetically connected to the two support plates at the same time.

[0017] By adopting the above technical solution, the round rod is used as the support member, and the distance between the support platform and the center of the round rod is the radius of the round rod. When the support platform abuts against the round rod at the same time, the support platform is easier to keep parallel with the line connecting the centers of the support rods. In addition, the two support plates used as the support platform are connected by magnetic attraction through a magnetic member, making the installation of the support platform more convenient.

[0018] Optionally, the round rod is rotatably connected to the support rod, and an alignment slit is provided at one end of the round rod, and the alignment slit passes through the outer circumference of the round rod; the detection device also includes a laser centering pen, and the laser centering pen is used to test the alignment of each round rod.

[0019] By adopting the above technical solution, during the installation of the support rods, the laser of the laser centering pen is used to illuminate the alignment slits of each round rod, so as to determine the height position of the center of each support rod. When the alignment slits on the round rods cannot allow the laser of the laser centering pen to pass through, it indicates that the installation state of the support rods does not meet the requirements. In this case, the support rods need to be readjusted and installed.

[0020] Optionally, the laser centering pen is provided with a mounting seat, and the mounting seat is used to be detachably connected to the round rod. When the laser centering pen is installed on the round rod, the light emission path of the laser centering pen passes through the alignment slit.

[0021] By adopting the above technical solution, when the laser centering pen is used, it can be detachably installed on a round rod away from the palm face through the mounting seat. There is no need to hold the laser centering pen when using it, making the use of the laser centering pen more convenient.

[0022] Optionally, the lifting and adjusting component includes a first electric cylinder, a second electric cylinder, a magnetic base and a measuring instrument fixture, the magnetic base is installed on the cylinder body of the first electric cylinder, the cylinder body of the second electric cylinder is installed on the output end of the first electric cylinder, the laser measuring instrument fixture is installed on the output end of the second electric cylinder, the magnetic base is used to adsorb the support table, and the laser measuring instrument is installed on the measuring instrument fixture; the driving direction of the first electric cylinder is opposite to the driving direction of the second electric cylinder.

[0023] By adopting the above technical solution, the driving directions of the first electric cylinder and the second electric cylinder of the lifting and adjusting member are opposite, which can reduce the height space occupied by the lifting and adjusting member when it is installed.

[0024] A method for detecting the verticality of a tunnel face is provided, based on any one of the above-mentioned devices for detecting the verticality of a tunnel face, and comprises the following steps: marking a mark line on the center line of the bottom surface of a tunnel that has been excavated; installing support rods of a detection device at intervals along the mark line, so that a screw at one end of the support rod is pressed against the bottom surface of the tunnel, and a screw at the other end is pressed against the top of the tunnel; installing a support platform on a support member, and then installing a laser measuring instrument and a lifting and adjusting member on the support platform; using the lifting and adjusting member to change the height position of the laser measuring instrument, the laser measuring instrument measures the distance to the face at different height positions respectively, and calculates the angle between the face and the central axis of the tunnel according to the distance data measured by the laser measuring instrument at different height positions; changing the different positions of the lifting and adjusting member and the laser measuring instrument on the support platform to adjust the distance from the laser measuring instrument to the face, and using the laser measuring instrument in different installation positions to measure the relative angle between the face and the central axis of the tunnel for multiple times, and taking an average value.

[0025] By adopting the above technical solution, when using the detection device to detect the tunnel face, the relative angle between the tunnel face and the central axis of the tunnel is measured multiple times and an average value is taken, which is conducive to ensuring the accuracy of the measurement result.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: When the detection device is used to detect the verticality of the tunnel, the center line of each support rod can be consistent with the central axis of the tunnel. When the support member is installed at the center of the support rod, the support platform installed on each support member can be used as a reference for the laser measuring instrument to measure the verticality of the tunnel face, which is conducive to improving the measurement accuracy of the verticality of the tunnel face.

[0027] The driving directions of the first electric cylinder and the second electric cylinder of the lifting and adjusting member are opposite, which can reduce the height space occupied by the lifting and adjusting member when it is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a stereoscopic diagram of the tunnel face verticality detection device in this embodiment in use.

[0029] Figure 2 It is a side view of the tunnel face verticality detection device in this embodiment when it is used in an inclined tunnel.

[0030] Figure 3 It is a schematic diagram used to reflect the connection state between the sliding guide and the screw in this embodiment.

[0031] Figure 4 It is a schematic diagram used to illustrate the connection relationship between the magnetic member and the support rod in this embodiment.

[0032] Figure 5 It is a schematic diagram for reflecting the installation state of the laser centering pen in this embodiment.

[0033] Description of reference numerals: 1. Laser measuring instrument; 2. Support frame; 21. Support platform; 211. Support plate; 22. Support rod; 221. Main rod; 222. Screw rod; 2221. Limiting notch; 2222. Guide groove; 223. Sliding guide; 224. Support member; 2241. Alignment slit; 226. Serial rod; 227. Carbide member; 2271. Spike protrusion; 23. Magnetic member; 231. Square rod body; 232. Magnet; 233. Limiting protrusion; 3. Control module; 4. Lifting and adjusting member; 41. First electric cylinder; 42. Second electric cylinder; 43. Magnetic base; 44. Measuring instrument fixture; 5. Laser centering pen; 51. Mounting seat; 511. Clamp; 512. Bolt and nut assembly. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] The present application embodiment discloses a tunnel face verticality detection device. Figure 1 and Figure 2The tunnel face verticality detection device comprises a laser measuring instrument 1, a support frame 2 and a control module 3. The support frame 2 comprises a support platform 21 and a plurality of support rods 22. The support rod 22 comprises a main rod 221, which is a tubular structure. The two ends of the main rod 221 are threadedly connected with screw rods 222. A sliding guide 223 is commonly connected between the two screw rods 222. A support member 224 is arranged at the midpoint of the main rod 221. The screw rods 222 at the two ends of the support rod 22 have opposite threaded directions. The plurality of support members 224 are used to jointly set up the support platform 21. The laser measuring instrument 1 is installed on the support platform 21. A lifting and adjusting member 4 is connected between the support platform 21 and the laser measuring instrument 1. The lifting and adjusting member 4 is used to adjust the height position of the laser measuring instrument 1. The control module 3 is used to obtain data from the laser measuring instrument 1 and to measure the verticality of the face according to the data from the laser measuring instrument 1.

[0036] When using the detection device to detect the verticality of the tunnel face, first, multiple support rods 22 are spaced apart in the tunnel along the center line of the bottom surface of the tunnel. The screw rods 222 at both ends of the support rods 22 can be synchronously extended and retracted so that the line connecting the centers of the support rods 22 can be consistent with the central axis of the tunnel. The support member 224 is installed at the center of the support rod 22, which can keep the support platform 21 installed on the support member 224 parallel to the central axis of the tunnel, so that the support platform 21 is suitable as a reference member for the laser measuring instrument 1 to measure the verticality of the tunnel face.

[0037] The laser measuring instrument 1 is installed on the support platform 21 through the lifting and adjusting member 4. The lifting and adjusting member 4 in this embodiment includes a first electric cylinder 41, a second electric cylinder 42, a magnetic base 43 and a measuring instrument fixture 44. The magnetic base 43 is installed on the cylinder body of the first electric cylinder 41, the cylinder body of the second electric cylinder 42 is installed on the output end of the first electric cylinder 41, the laser measuring instrument 1 fixture is installed on the output end of the second electric cylinder 42, the magnetic base 43 is used to adsorb the support platform 21, and the laser measuring instrument 1 is installed on the measuring instrument fixture 44; the driving direction of the first electric cylinder 41 and the driving direction of the second electric cylinder 42. The laser measuring instrument 1 is used to measure the distance from the face of the tunnel at different height positions, and the verticality information of the face of the tunnel can be measured in combination with the height change data of the lifting and adjusting member 4. The height change data of the lifting and adjusting member 4 can be measured manually, or the control module 3 can be used to obtain the data signal of the telescopic length of the first electric cylinder 41 and the second electric cylinder 42 and then summarize and calculate. The control module 3 has a prefabricated calculation program, which can calculate the verticality of the tunnel face through the measurement data of the laser measuring instrument 1 and the height change data of the lifting and adjusting member 4 .

[0038] In addition, the lifting and adjusting member 4 is connected to the support platform 21 through the magnetic base 43, so that the position of the lifting and adjusting member 4 and the laser measuring instrument 1 along the tunnel width direction can be adjusted as needed, so that the laser measuring instrument 1 can measure the verticality of a larger range on the tunnel face.

[0039] Reference Figure 3 The screw rod 222 is a solid rod, and a guide groove 2222 is provided on the outer circumference of the screw rod 222. The guide groove 2222 is arranged along the circumference of the screw rod 222, and the guide groove 2222 is arranged through one end close to the support rod 22. The sliding guide 223 passes through the guide grooves 2222 of the two screw rods 222 at the same time. The sliding guide 223 is a slender rod-shaped structure, and the sliding guide 223 is staggered with the center line of the support rod 22. The two screw rods 222 form a sliding connection through the cooperation of the sliding guide 223 and the guide groove 2222.

[0040] Reference Figure 1 A hard alloy part 227 is provided at one end of the upper screw rod 22 away from the support rod 22. The hard alloy part 227 is provided with a threaded hole adapted to the screw rod 222. A side of the hard alloy part 227 away from the upper screw rod 222 is provided with evenly distributed spike protrusions 2271. The spike protrusions 2271 are used to abut the top wall of the tunnel. The spike protrusions 2271 can increase the friction between the upper screw rod 222 and the top wall of the tunnel, so that the installation state of the support rod 22 is more stable.

[0041] Reference Figure 1 One of the two screw rods 222 is a lower screw rod 222, and the other is an upper screw rod 222. A limiting notch 2221 is provided at one end of the lower screw rod 222 away from the support rod 22. Each lower screw rod 222 of the support rod 22 is commonly connected with a serial rod 226, and each support rod 22 is plugged into the serial rod 226 through the limiting notch 2221. The serial rod 226 can make it easier for each support rod 22 to align along the center line of the bottom surface of the tunnel. In the process of rotating the main rod 221 of the support rod 22, the serial rod 226 limits the freedom of the lower screw rod 222 to rotate around its own axis, so that the main rod 221 is easier to rotate, and it is easier to extend the support rod 22 upward to press against the top wall of the tunnel.

[0042] Reference Figure 1 and Figure 3 The support member 224 is a round rod, and the two ends of the round rod extend out of the outer circumference of the support rod 22 respectively; the support platform 21 includes two support plates 211 parallel to each other, the support plates 211 are steel parts, the support plates 211 are ferromagnetic, and the support plates 211 are long strip structures. When the support plates 211 are installed, the length direction is along the arrangement direction of the support rods 22. Each support rod 22 is located between the two support plates 211, and the lower surfaces of the two support plates 211 are respectively in contact with the two ends of the round rod.

[0043] Reference Figure 1 and Figure 4The two support plates 211 are connected to two magnetic members 23. The magnetic member 23 includes a square rod body 231 and a magnet 232. The magnet 232 is embedded and fixed in the square rod body 231. The magnetic member 23 is magnetically connected to the two support plates 211. The two ends of the square rod body 231 are respectively provided with limiting protrusions 233. The two support plates 211 are located between the two limiting protrusions 233. The support plates 211 are provided with positioning notches for avoiding the limiting protrusions 233. The limiting protrusions 233 can prevent the two support plates 211 from separating from each other.

[0044] Reference Figure 1 and Figure 5 The round rod is rotatably connected to the support rod 22, and one end of the round rod is provided with an alignment slit 2241, which penetrates the outer circumference of the round rod; the detection device also includes a laser centering pen 5, which is used to test the alignment of each round rod; the alignment slit 2241 includes multiple segments, and the width of each segment gradually decreases in the direction away from the end face of the round rod. The laser centering pen 5 is provided with a mounting seat 51, and the mounting seat 51 is provided with two clamps 511, and the mounting seat 51 is provided with two bolt and nut assemblies 512, and the two screw and nut assemblies correspond to the two clamps 511 respectively, and the screw and nut assemblies are used to shrink the clamps 511, and the directions of the two clamps 511 are perpendicular to each other, one of which is used to clamp the round rod, and the other is used to clamp the laser centering pen 5, and when the laser centering pen 5 is installed on the round rod, the light path of the laser centering pen 5 passes through the alignment slit 2241.

[0045] During the installation of the support rods 22 , the laser of the laser centering pen 5 is used to illuminate the alignment slits 2241 of each round rod, so as to determine the height position of the center of each support rod 22 .

[0046] The present application also discloses a tunnel face verticality detection method, based on the above-mentioned tunnel face verticality detection device, comprising the following steps: Step 1, draw a marking line on the center line of the bottom surface of the tunnel that has been excavated; Step 2, placing the connecting rod 226 on the bottom surface of the tunnel, aligning the center line of the connecting rod 226 with the marking line, pressing the connecting rod 226 with a heavy object, or temporarily fixing the connecting rod 226 to the bottom of the tunnel with self-tapping screws or cement nails. When fixing the connecting rod 226 with self-tapping screws or cement nails, it is necessary to pre-open a through hole on the connecting rod 226; Install multiple support rods 22 of the detection device at intervals along the marking line, so that the lower screw rod 222 of the support rod 22 is pressed against the bottom surface of the tunnel, and the limiting notch 2221 of the lower screw rod 222 is plugged into the serial rod 226, and then rotate the main rod 221 of the support rod 22, so that the upper screw rod 222 and the lower screw rod 222 are extended synchronously until the upper screw rod 222 is pressed against the top of the tunnel; in this process, use a level ruler to control the installation state of the support rod 22, so that the axial direction of the support rod 22 is kept perpendicular to the width direction of the tunnel; Furthermore, when the round rod as the support member 224 is parallel to the central axis of the tunnel, the main rod 221 of the support rod 22 needs to be rotated excessively so that the round rod is rotated to be relatively perpendicular to the central axis of the tunnel; After the support rod 22 is installed, the laser centering pen 5 is installed on a round rod away from the tunnel face, and the installation state of the support rod 22 is judged by the laser of the laser centering pen 5 passing through the alignment slit 2241 of the round rod. The installation state of the support rod 22 whose alignment slit 2241 cannot be passed by the laser needs to be adjusted; Step 3, the support platform 21 is mounted on the support member 224, the two support plates 211 of the support platform 21 are connected by the magnetic member 23, and then the laser measuring instrument 1 and the lifting and lowering adjustment member 4 are mounted on the support platform 21; Step 4, using the lifting adjustment member 4 to change the height position of the laser measuring instrument 1, the laser measuring instrument 1 respectively measures the distance from the laser measuring instrument 1 to the tunnel face at different height positions, and calculates the angle between the tunnel face and the central axis of the tunnel according to the distance data measured by the laser measuring instrument 1 at different height positions; Step 5, change the different positions of the lifting adjustment member 4 and the laser measuring instrument 1 on the support platform 21 to adjust the distance from the laser measuring instrument 1 to the tunnel face, use the laser measuring instrument 1 in different installation positions to measure the relative angle between the tunnel face and the tunnel centerline multiple times, and take the average value to ensure the accuracy of the measurement results.

[0047] It should be noted that as the tunnel excavation progresses, one or several support rods 22 away from the tunnel face can be dismantled and reinstalled to a position close to the tunnel face, so that the reinstalled support rods 22 are combined with the undismantled support rods 22, and then the support platform is reinstalled for inspection, which helps to reduce the time for disassembly and assembly of the inspection device.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tunnel face verticality detection device, characterized in that: The invention comprises a laser measuring instrument (1) and a support frame (2), wherein the support frame (2) comprises a support platform (21) and a plurality of support rods (22); when the support rods (22) are in use, the upper ends are used to abut against the top wall of a tunnel, and the lower ends are used to abut against the bottom surface of the tunnel; the support rods (22) comprise a main rod (221), both ends of the main rod (221) are threadedly connected with screw rods (222), a sliding guide member (223) is commonly connected between the two screw rods (222), a support member (224) is provided at the midpoint of the main rod (221), the screw rods (222) at the two ends of the support rod (22) have opposite threaded directions, and a plurality of support members (224) are commonly used to erect the support platform (21); the laser measuring instrument (1) is mounted on the support platform (21), a lifting adjustment member (4) is connected between the support platform (21) and the laser measuring instrument (1), and the lifting adjustment member (4) is used to adjust the height position of the laser measuring instrument (1).

2. A tunnel face verticality detection device according to claim 1, characterized in that: It also comprises a control module (3), wherein the control module (3) is used to obtain data from the laser measuring instrument (1) and to measure the verticality of the tunnel face based on the data from the laser measuring instrument (1).

3. The tunnel face verticality detection device according to claim 1, characterized in that: One of the two screw rods (222) is a lower screw rod (222), and the other is an upper screw rod (222); a limiting notch (2221) is provided at one end of the lower screw rod (222) away from the support rod (22); the support frame (2) further comprises a connecting rod (226); each support rod (22) is plugged into the connecting rod (226) via the limiting notch (2221).

4. A tunnel face verticality detection device according to claim 3, characterized in that: The screw rod (222) is a solid rod, and a guide groove (2222) is provided on the circumferential surface of the screw rod (222). The guide groove (2222) is provided through one end of the support rod (22), and the sliding guide member (223) passes through the guide grooves (2222) of the two screw rods (222) at the same time.

5. The tunnel face verticality detection device according to claim 3 is characterized in that: One end of the upper screw rod (222) away from the support rod (22) is detachably connected to a hard alloy piece (227), and a side of the hard alloy piece (227) away from the upper screw rod (222) is provided with a plurality of spike protrusions (2271), and the plurality of spike protrusions (2271) are used to abut against the top wall of the tunnel.

6. The tunnel face verticality detection device according to claim 1, characterized in that: The support member (224) is a round rod, and the two ends of the round rod respectively extend out of the outer circumferential surface of the support rod (22); the support platform (21) comprises two support plates (211) parallel to each other, each support rod (22) is located between the two support plates (211), the lower surfaces of the two support plates (211) respectively abut against the two ends of the round rod, the support plates (211) are ferromagnetic, and the two support plates (211) are commonly connected to a magnetic member (23), and the magnetic member (23) is magnetically connected to the two support plates (211) at the same time.

7. The tunnel face verticality detection device according to claim 6, characterized in that: The round rod is rotatably connected to the support rod (22); one end of the round rod is provided with an alignment slit (2241); the alignment slit (2241) penetrates the outer circumference of the round rod; the detection device further comprises a laser centering pen (5); the laser centering pen (5) is used to test the alignment of each round rod.

8. The tunnel face verticality detection device according to claim 7, characterized in that: The laser centering pen (5) is provided with a mounting seat (51), and the mounting seat (51) is used to be detachably connected to the round rod. When the laser centering pen (5) is mounted on the round rod, the light emission path of the laser centering pen (5) passes through the alignment slit (2241).

9. The tunnel face verticality detection device according to claim 1, characterized in that: The lifting and lowering adjustment member (4) comprises a first electric cylinder (41), a second electric cylinder (42), a magnetic base (43) and a measuring instrument fixture (44); the magnetic base (43) is mounted on the cylinder body of the first electric cylinder (41); the cylinder body of the second electric cylinder (42) is mounted on the output end of the first electric cylinder (41); the laser measuring instrument (1) fixture is mounted on the output end of the second electric cylinder (42); the magnetic base (43) is used to adsorb the support platform (21); and the laser measuring instrument (1) is mounted on the measuring instrument fixture (44); the driving direction of the first electric cylinder (41) is opposite to the driving direction of the second electric cylinder (42).

10. A method for detecting verticality of a tunnel face, based on a device for detecting verticality of a tunnel face according to any one of claims 1 to 9, characterized in that: The steps include: Mark the center line of the bottom of the tunnel that has been excavated; Installing support rods (22) of the detection device at intervals along the marking line, so that the screw rod (222) at one end of the support rod (22) is pressed against the bottom surface of the tunnel, and the screw rod (222) at the other end is pressed against the top of the tunnel; Mounting the support platform (21) on the support member (224), and then mounting the laser measuring instrument (1) and the lifting and lowering adjusting member (4) on the support platform (21); The height position of the laser measuring instrument (1) is changed by using a lifting adjustment member (4), and the laser measuring instrument (1) respectively measures the distance from the laser measuring instrument (1) to the tunnel face at different height positions, and the angle between the tunnel face and the central axis of the tunnel is calculated based on the distance data measured by the laser measuring instrument (1) at different height positions; The positions of the lifting adjustment member (4) and the laser measuring instrument (1) on the support platform (21) are changed to adjust the distance between the laser measuring instrument (1) and the tunnel face. The relative angle between the tunnel face and the central axis of the tunnel is measured multiple times using the laser measuring instrument (1) in different installation positions to obtain an average value.

Images