A tunnel face perpendicularity detection device and detection method

Abstract

The present application discloses a tunnel face perpendicularity detection device, which relates to the field of tunnel construction surveying technology. The device includes a laser measuring instrument and a support frame. The support frame includes a support table and a plurality of support rods. When in use, the upper end of the support rod is used to abut against the top wall of the tunnel, and the lower end is used to abut against the bottom surface of the tunnel. The support rod includes a main rod, and screw rods are threadedly connected to both ends of the main rod. A sliding guide member is commonly connected between the two screw rods. A support member is provided at the midpoint of the main rod. The thread directions of the screw rods at both ends of the support rod are opposite. A plurality of the support members are used to commonly support the support table. The laser measuring instrument is installed on the support table, and a lifting adjustment member is connected between the support table and the laser measuring instrument. The lifting adjustment member is used to adjust the height position of the laser measuring instrument. The present application can improve the measurement accuracy of the perpendicularity of the tunnel face.

Description

Technical Field

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

[0002] The tunnel face is the interface between the excavated and unexcavated rock formations. In tunnel construction, the tunnel face is the working face facing forward continuously, and it is the advancing front during the excavation process.

[0003] The perpendicularity of the tunnel face has a great influence on the accuracy of the tunnel driving trajectory. In order to control the accuracy of the tunnel driving path, it is necessary to control the perpendicularity of the tunnel face. Generally, when measuring the perpendicularity of geometric elements, a certain measurement reference is required. The measurement reference for the perpendicularity of the tunnel face is usually the bottom surface of the already formed tunnel. However, as a spatial three-dimensional structure, it is difficult to accurately measure the perpendicularity of the tunnel face only based on the bottom surface of the tunnel. Summary of the Invention

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

[0005] The tunnel face perpendicularity detection device and detection method provided by the present application adopt the following technical solutions:

[0006] A tunnel face perpendicularity detection device includes a laser measuring instrument and a support frame. The support frame includes a support table and a plurality of support rods. When in use, the upper end of the support rod is used to abut against the top wall of the tunnel, and the lower end is used to abut against the bottom surface of the tunnel. The support rod includes a main rod, and screw rods are threadedly connected to both ends of the main rod. A sliding guide member is commonly connected between the two screw rods. A support member is provided at the midpoint of the main rod. The thread directions of the screw rods at both ends of the support rod are opposite. The plurality of support members are used to commonly support the support table. The laser measuring instrument is installed on the support table, and a lifting adjustment member is connected between the support table and the laser measuring instrument. The lifting adjustment member is used to adjust the height position of the laser measuring instrument.

[0007] By adopting the above technical solution, when using the detection device to detect the perpendicularity of the tunnel, a plurality of support rods of the detection device are installed at intervals along the center line of the bottom surface of the tunnel in the already excavated tunnel, so that the screw rod at one end of the support rod abuts against the bottom surface of the tunnel, and the screw rod at the other end abuts against the top wall of the tunnel. Then, the support platform is installed on the support members of the plurality of support rods, and the laser measuring instrument is installed on the support platform through the lifting adjustment member. Next, the distance from the laser measuring instrument to the tunnel face is measured. During this process, the height position of the laser measuring instrument is changed through the lifting adjustment member, and the distance from the laser measuring instrument to the tunnel face at different height positions is measured. Combining the height data of the laser measuring instrument, the inclination of the tunnel face is measured.

[0008] In this 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 synchronously screw and stretch. Therefore, when the support rod is installed on the center line of the bottom surface of the tunnel, the center lines of the respective support rods can be kept 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 perpendicularity of the tunnel face, which is beneficial to improving the measurement accuracy of the perpendicularity of the tunnel face.

[0009] Optionally, it further includes a control module, and the control module is used to obtain the data of the laser measuring instrument and calculate the perpendicularity of the tunnel face according to the data of the laser measuring instrument.

[0010] By adopting the above technical solution, the control module can obtain the measurement data signal generated by the laser measuring instrument, and a program for calculating the perpendicularity between the tunnel face and the central axis of the tunnel is preset in the control module, making it more convenient to calculate the perpendicularity of the tunnel face.

[0011] Optionally, one of the two screw rods is a lower screw rod, and the other is an upper screw rod. A limit notch is provided at one end of the lower screw rod away from the support rod; the support frame further includes a connecting rod, and each support rod is inserted into the connecting rod through the limit notch.

[0012] By adopting the above technical solution, the respective support rods are connected in series through the connecting rod, enabling the respective support rods to be kept as much as possible on the center line of the bottom surface of the tunnel. During the process of adjusting the length of the support rod by screw rotation, the lower screw rod is restricted by the connecting rod, making it more convenient to adjust the length of the support rod.

[0013] Optionally, the screw rod is a solid rod, and a guiding groove is provided on the peripheral surface of the screw rod. One end of the guiding groove close to the support rod is provided with a through hole, and the sliding guiding member passes through the guiding grooves of the two screw rods at the same time.

[0014] By adopting the above technical solution, the two screw rods are slidably connected through the guiding groove and the sliding guiding member.

[0015] Optionally, a cemented carbide part is detachably connected to one end of the upper screw rod away from the support rod. A plurality of spike protrusions are provided on a side of the cemented carbide part away from the upper screw rod, and the plurality of spike protrusions are used for abutting against the top wall of the tunnel.

[0016] By adopting the above technical solution, the upper end of the upper screw rod abuts against the top wall of the tunnel through the spike protrusions of the cemented carbide part, which is beneficial to increasing the frictional force 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, and is beneficial to improving the stability of the installation state of the support rod.

[0017] Optionally, the support member is a round rod, and both ends of the round rod respectively extend out of the outer peripheral surface of the support rod; the support platform includes two parallel support plates, 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 correspondingly. The support plates are ferromagnetic, and a magnetic member is commonly connected to the two support plates, and the magnetic member is magnetically connected to the two support plates at the same time.

[0018] By adopting the above technical solution, with the round rod as the support member, 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, it is relatively easy for the support platform to be parallel to the connection line of the centers of each support rod. In addition, the two support plates used as the support platform are magnetically connected by the magnetic member, making the installation of the support platform more convenient.

[0019] 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 penetrates through the outer peripheral surface of the round rod; the detection device further includes a laser alignment pen, and the laser alignment pen is used to test the alignment of each round rod.

[0020] By adopting the above technical solution, during the installation of the support rod, the laser of the laser alignment pen is irradiated on the alignment slits of each round rod to facilitate judging the height position of the center of each support rod. When the alignment slit on the round rod cannot allow the laser of the laser alignment pen to pass through, it indicates that the installation state of the support rod does not meet the requirements. In this case, the support rod needs to be reinstalled and adjusted.

[0021] Optionally, the laser alignment pen is provided with a mounting seat, and the mounting seat is used for detachably connecting to the round rod. When the laser alignment pen is mounted on the round rod, the light emitting path of the laser alignment pen passes through the alignment slit.

[0022] By adopting the above technical solution, when the laser alignment pen is in use, it is detachably mounted on a round rod away from the heading face through the mounting seat, and there is no need to hold the laser alignment pen for use, making the use process of the laser alignment pen more convenient.

[0023] Optionally, the lifting and adjusting member includes a first electric cylinder, a second electric cylinder, a magnetic adsorption base, and a measuring instrument jig. The magnetic adsorption base is installed on the cylinder body of the first electric cylinder. The cylinder body of the second electric cylinder is installed at the output end of the first electric cylinder. The laser measuring instrument jig is installed at the output end of the second electric cylinder. The magnetic adsorption base is used to adsorb and support the support table. The laser measuring instrument is installed on the measuring instrument jig. The driving direction of the first electric cylinder is opposite to that of the second electric cylinder.

[0024] By adopting the above technical solution, the driving directions between the first electric cylinder and the second electric cylinder of the lifting and adjusting member are opposite, which can reduce the height space occupied during the installation of the lifting and adjusting member.

[0025] A method for detecting the verticality of a tunnel heading face, based on any one of the above-mentioned tunnel heading face verticality detection devices, includes the following steps: draw a marking line on the center line of the bottom surface of the already excavated tunnel; install the support rods of the detection device at intervals along the marking line, so that the screw at one end of the support rod abuts against the bottom surface of the tunnel, and the screw at the other end abuts against the top of the tunnel; install the support table on the support member, and then install the laser measuring instrument and the lifting and adjusting member on the support table; use the lifting and adjusting member to change the height position of the laser measuring instrument. When the laser measuring instrument is at different height positions, measure the distance from it to the heading face respectively. According to the distance data measured by the laser measuring instrument at different height positions, calculate the angle between the heading face and the tunnel central axis; change the different positions of the lifting and adjusting member and the laser measuring instrument on the support table to adjust the distance from the laser measuring instrument to the heading face. When the laser measuring instrument is in different installation positions, measure the relative angle between the heading face and the tunnel central axis multiple times and take the average value.

[0026] By adopting the above technical solution, during the process of using the detection device to detect the heading face of the tunnel, after measuring the relative angle between the heading face and the tunnel central axis multiple times and taking the average value, it is beneficial to ensure the accuracy of the measurement result.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] When using the detection device to detect the verticality of the tunnel, the center lines of each support rod can be kept consistent with the tunnel central axis. When the support member is installed at the center of the support rod, the support table installed on each support member can be used as a reference for the laser measuring instrument to measure the verticality of the heading face, which is beneficial to improving the measurement accuracy of the verticality of the heading face.

[0029] The driving directions between the first electric cylinder and the second electric cylinder of the lifting and adjusting member are opposite, which can reduce the height space occupied during the installation of the lifting and adjusting member. Description of the Drawings

[0030] Figure 1It is a perspective view of the tunnel face perpendicularity detection device in the present embodiment in the working state.

[0031] Figure 2 It is a side view of the tunnel face perpendicularity detection device in the present embodiment in the working state in an inclined tunnel.

[0032] Figure 3 It is a schematic diagram for showing the connection state between the sliding guide and the screw rod in the present embodiment.

[0033] Figure 4 It is a schematic diagram for showing the connection relationship between the magnetic part and the support rod in the present embodiment.

[0034] Figure 5 It is a schematic diagram for showing the installation state of the laser alignment pen in the present embodiment.

[0035] Explanation of reference numerals:

[0036] 1. Laser measuring instrument; 2. Support frame; 21. Support table; 211. Support plate; 22. Support rod; 221. Main rod; 222. Screw rod; 2221. Limit notch; 2222. Guide groove; 223. Sliding guide; 224. Support member; 2241. Alignment slit; 226. String rod; 227. Cemented carbide part; 2271. Spiked protrusion; 23. Magnetic part; 231. Square rod body; 232. Magnet; 233. Limit protrusion; 3. Control module; 4. Lifting and adjusting part; 41. First electric cylinder; 42. Second electric cylinder; 43. Magnetic suction base; 44. Measuring instrument jig; 5. Laser alignment pen; 51. Mounting seat; 511. Clamping opening; 512. Bolt and nut assembly. Detailed implementation manners

[0037] The following is a further detailed description of the present application in conjunction with the attached Figures 1-5 This application is further described in detail below.

[0038] The embodiment of the present application discloses a tunnel face perpendicularity detection device. Refer to Figure 1 and Figure 2, The tunnel face perpendicularity detection device includes a laser measuring instrument 1, a support frame 2 and a control module 3. The support frame 2 includes a support platform 21 and a plurality of support rods 22; the support rods 22 include a main rod 221, the main rod 221 is a tubular structure, screw rods 222 are threadedly connected to both ends of the main rod 221, and 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 thread directions of the screw rods 222 at both ends of the support rod 22 are opposite. The plurality of support members 224 are used to jointly support the support platform 21; the laser measuring instrument 1 is installed on the support platform 21, and a lifting adjustment member 4 is connected between the support platform 21 and the laser measuring instrument 1. The lifting adjustment member 4 is used to adjust the height position of the laser measuring instrument 1. The control module 3 is used to obtain the data of the laser measuring instrument 1 and calculate the perpendicularity of the tunnel face according to the data of the laser measuring instrument 1.

[0039] When using the detection device to detect the perpendicularity of the tunnel face, first, a plurality of support rods 22 are spaced along the center line of the bottom surface of the tunnel and supported in the tunnel. The screw rods 222 at both ends of the support rod 22 can synchronously extend and retract, so that the connection line of the centers of the support rods 22 can be kept consistent with the central axis of the tunnel. The support member 224 is installed at the center of the support rod 22, which can make 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 perpendicularity of the tunnel face.

[0040] The laser measuring instrument 1 is installed on the support platform 21 through the lifting adjustment member 4. In this embodiment, the lifting adjustment member 4 includes a first electric cylinder 41, a second electric cylinder 42, a magnetic adsorption base 43 and a measuring instrument fixture 44. The magnetic adsorption 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 adsorption 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. By using the laser measuring instrument 1 to measure the distance to the tunnel face at different height positions, combined with the height change data of the lifting adjustment member 4, the perpendicularity information of the tunnel face can be measured. The height change data of the lifting adjustment member 4 can be manually measured, or the data signals of the telescopic lengths of the first electric cylinder 41 and the second electric cylinder 42 are obtained by the control module 3 and then summarized and calculated. The control module 3 is pre-programmed to calculate the perpendicularity of the tunnel face through the measurement data of the laser measuring instrument 1 and the height change data of the lifting adjustment member 4.

[0041] In addition, the lifting adjustment member 4 is connected to the support platform 21 through the magnetic adsorption base 43, so that the positions of the lifting adjustment member 4 and the laser measuring instrument 1 in the tunnel width direction can be adjusted according to needs, so that the laser measuring instrument 1 can measure the perpendicularity of a larger range on the tunnel face.

[0042] Refer toFigure 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Reference Figure 1 and Figure 4, two supporting plates 211 are jointly connected with two magnetic members 23. The magnetic members 23 include a square rod body 231 and a magnet 232. The magnet 232 is embedded and fixed in the square rod body 231. The magnetic members 23 are magnetically connected to the two supporting plates 211 at the same time. Limiting protrusions 233 are respectively arranged at both ends of the square rod body 231. The two supporting plates 211 are located between the two limiting protrusions 233. The supporting plates 211 are provided with positioning notches for avoiding the limiting protrusions 233. The limiting protrusions 233 can prevent the two supporting plates 211 from separating from each other.

[0047] Referring to Figure 1 and Figure 5 , the round rod is rotatably connected to the support rod 22. An alignment slit 2241 is arranged at one end of the round rod. The alignment slit 2241 penetrates through the outer peripheral surface of the round rod; the detection device further includes a laser alignment pen 5 for testing 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 alignment pen 5 is provided with a mounting seat 51. The mounting seat 51 is provided with two clamping openings 511. The mounting seat 51 is provided with two bolt-nut assemblies 512. The two screw-nut assemblies respectively correspond to the two clamping openings 511. The screw-nut assemblies are used to contract the clamping openings 511. The orientations of the two clamping openings 511 are perpendicular to each other. One of them is used to clamp the round rod, and the other is used to clamp the laser alignment pen 5. When the laser alignment pen 5 is installed on the round rod, the light-emitting path of the laser alignment pen 5 passes through the alignment slit 2241.

[0048] During the process of installing the support rod 22, the alignment slits 2241 of each round rod are irradiated with the laser of the laser alignment pen 5 to facilitate judging the height positions of the centers of the support rods 22.

[0049] This application also discloses a method for detecting the perpendicularity of a tunnel heading face. Based on the above-mentioned tunnel heading face perpendicularity detection device, it includes the following steps:

[0050] Step 1, draw a marking line on the center line of the bottom surface of the already excavated tunnel;

[0051] Step 2, place the series connection rod 226 on the bottom surface of the tunnel, align the center line of the series connection rod 226 with the marking line, press the series connection rod 226 with a heavy object, or temporarily fix the series connection rod 226 at the bottom of the tunnel with self-tapping screws or cement nails. When fixing the series connection rod 226 with self-tapping screws or cement nails, through holes need to be pre-opened on the series connection rod 226;

[0052] A plurality of support rods 22 for detecting devices are installed at intervals along the marked line, so that the lower screw rod 222 of the support rod 22 abuts against the bottom surface of the tunnel, and the limit notch 2221 of the lower screw rod 222 is inserted into the connecting rod 226. Then, rotate the main rod 221 of the support rod 22 to make the upper screw rod 222 and the lower screw rod 222 extend synchronously until the upper screw rod 222 abuts against the top of the tunnel; during this process, use a spirit level to control the installation state of the support rod 22 to make the axis of the support rod 22 perpendicular to the width direction of the tunnel;

[0053] Moreover, when the round rod serving as the support member 224 is parallel to the central axis of the tunnel, it is necessary to rotate the main rod 221 of the support rod 22 excessively to make the round rod rotate to be relatively perpendicular to the central axis of the tunnel;

[0054] After the support rod 22 is installed, install the laser alignment pen 5 on a round rod far from the heading face. Use the method that the laser of the laser alignment pen 5 passes through the alignment slit 2241 of the round rod to judge the installation state of the support rod 22. The installation state of the support rod 22 where the alignment slit 2241 cannot allow the laser to pass through needs to be adjusted;

[0055] Step 3, install the support platform 21 on the support member 224. The two support plates 211 of the support platform 21 are connected by magnetic members 23. Then, install the laser measuring instrument 1 and the lifting adjustment member 4 on the support platform 21;

[0056] Step 4, use the lifting adjustment member 4 to change the height position of the laser measuring instrument 1. When the laser measuring instrument 1 is at different height positions, measure its distance to the heading face respectively. According to the distance data measured when the laser measuring instrument 1 is at different height positions, calculate the angle between the heading face and the central axis of the tunnel;

[0057] 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 heading face. Under the state of different installation positions of the laser measuring instrument 1, measure the relative angle between the heading face and the central axis of the tunnel multiple times and take the average value to facilitate ensuring the accuracy of the measurement result.

[0058] It should be noted that as the tunnel is excavated and advanced, one or several support rods 22 far from the heading face can be disassembled and then reinstalled to a position close to the tunnel heading face, so that the reinstalled support rods 22 are combined with the non-disassembled support rods 22. Then, after reinstalling the support platform, conduct detection, which is beneficial to reducing the time for disassembling and installing the detection device.

[0059] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A tunnel face perpendicularity detection device, characterized in that, It includes a laser measuring instrument (1) and a support frame (2). The support frame (2) includes a support table (21) and a plurality of support rods (22). When in use, the upper end of the support rod (22) is used to abut against the top wall of the tunnel, and the lower end is used to abut against the bottom surface of the tunnel. The support rod (22) includes a main rod (221). Screws (222) are threadedly connected to both ends of the main rod (221). A sliding guide member (223) is commonly connected between the two screws (222). A support member (224) is provided at the midpoint of the main rod (221). The thread directions of the screws (222) at both ends of the support rod (22) are opposite. The plurality of support members (224) are used to commonly support the support table (21). The laser measuring instrument (1) is installed on the support table (21). A lifting adjustment member (4) is connected between the support table (21) and the laser measuring instrument (1). The lifting adjustment member (4) is used to adjust the height position of the laser measuring instrument (1). The support member (224) is a round rod, and both ends of the round rod respectively protrude from the outer peripheral surface of the support rod (22). The support table (21) includes two parallel support plates (211). 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 correspondingly. The support plate (211) has ferromagnetism. The two support plates (211) are commonly connected with a magnetic member (23). The magnetic member (23) is magnetically connected to the two support plates (211) simultaneously. The round rod is rotatably connected to the support rod (22). An alignment slit (2241) is provided at one end of the round rod. The alignment slit (2241) penetrates through the outer peripheral surface of the round rod. The detection device further includes a laser alignment pen (5). The laser alignment pen (5) is used to test the alignment of each round rod.

2. The verticality detection device for a tunnel heading face according to claim 1, wherein: It further includes a control module (3). The control module (3) is used to obtain the data of the laser measuring instrument (1) and calculate the verticality of the heading face according to the data of the laser measuring instrument (1).

3. The verticality detection device for a tunnel heading face according to claim 1, characterized in that: One of the two screws (222) is a lower screw (222), and the other is an upper screw (222). A limit notch (2221) is provided at the end of the lower screw (222) away from the support rod (22). The support frame (2) further includes a connecting rod (226). Each support rod (22) is inserted into the connecting rod (226) through the limit notch (2221).

4. The tunnel face perpendicularity detection device according to claim 3, characterized in that: The screw (222) is a solid rod. A guide groove (2222) is provided on the peripheral surface of the screw (222). One end of the guide groove (2222) close to the support rod (22) is provided with a through hole. The sliding guide member (223) passes through the guide grooves (2222) of the two screws (222) simultaneously.

5. The tunnel face perpendicularity detection device according to claim 3, characterized in that: One end of the upper screw rod (222) far away from the support rod (22) is detachably connected with a cemented carbide part (227). On one side of the cemented carbide part (227) far away from the upper screw rod (222), there are a plurality of spike protrusions (2271), and the plurality of spike protrusions (2271) are used for abutting against the top wall of the tunnel.

6. The verticality detection device for a tunnel heading face according to claim 1, wherein: The laser alignment pen (5) is provided with a mounting seat (51), and the mounting seat (51) is used for detachably connecting with a round rod. When the laser alignment pen (5) is mounted on the round rod, the light emitting path of the laser alignment pen (5) passes through the alignment slit (2241).

7. A tunnel face perpendicularity detection device according to claim 1, characterized in that: The lifting and adjusting part (4) includes a first electric cylinder (41), a second electric cylinder (42), a magnetic adsorption base (43) and a measuring instrument fixture (44). The magnetic adsorption 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 fixture of the laser measuring instrument (1) is mounted on the output end of the second electric cylinder (42). The magnetic adsorption base (43) is used for adsorbing the support table (21). 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).

8. A method for detecting the perpendicularity of a tunnel heading face, based on the tunnel heading face perpendicularity detection device according to any one of claims 1-7, characterized in that, It includes the following steps: Draw a marking line on the midline of the bottom surface of the already excavated tunnel; Install the support rods (22) of the detection device at intervals along the marking line, so that one end of the screw rod (222) of the support rod (22) abuts against the bottom surface of the tunnel, and the screw rod (222) at the other end abuts against the top of the tunnel; Install the support table (21) on the support member (224), and then install the laser measuring instrument (1) and the lifting and adjusting part (4) on the support table (21); Use the lifting and adjusting part (4) to change the height position of the laser measuring instrument (1). When the laser measuring instrument (1) is at different height positions, measure the distance from it to the heading face respectively. According to the distance data measured by the laser measuring instrument (1) at different height positions, calculate the angle between the heading face and the tunnel central axis; Change the different positions of the lifting and adjusting part (4) and the laser measuring instrument (1) on the support table (21) to adjust the distance from the laser measuring instrument (1) to the heading face. Use the laser measuring instrument (1) in the states of different installation positions to measure the relative angle between the heading face and the tunnel central axis multiple times, and take the average value.

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