A steel arch installation trolley and method for tunnel construction

Abstract

A steel arch installation trolley and method for tunnel construction, comprising a trolley frame, a plurality of drive wheels are installed at the lower end of the trolley frame, a lifting assembly is fixed at the upper end of the trolley frame, an adjusting assembly is installed at the top of the lifting assembly and is lifted or lowered by the lifting assembly, a clamping assembly is installed at the top of the adjusting assembly and adjusts the horizontal position and angle by the adjusting assembly, and the clamping assembly clamps and fixes the steel arch. The steel arch installation trolley and method for tunnel construction provided by the application can improve the installation efficiency and precision of the steel arch.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction, and in particular to a steel arch frame installation trolley and method for tunnel construction. Background Technology

[0002] In tunnel construction, the installation of steel arch frames is a crucial step in the initial support process, directly impacting the stability of the tunnel structure and construction safety. Traditional steel arch frame installation methods primarily rely on manual lifting and the use of simple tools (such as hoists and crowbars). However, existing steel arch frame installation equipment suffers from poor installation precision, making it difficult to achieve multi-dimensional precise control during installation position adjustments. This results in insufficient contact between the steel arch frame and the surrounding rock, affecting the support effect. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a steel arch frame installation trolley and method for tunnel construction, which can improve the installation efficiency and accuracy of steel arch frames.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A steel arch frame installation trolley for tunnel construction includes a frame, multiple sets of drive wheels are installed at the lower end of the frame, a lifting assembly is fixed at the upper end of the frame, an adjustment assembly is installed at the top of the lifting assembly and is raised or lowered by the lifting assembly; a clamping assembly is installed at the top of the adjustment assembly and is adjusted in horizontal position and angle by the adjustment assembly; the clamping assembly clamps and fixes the steel arch frame.

[0005] The lifting assembly includes a base frame, a scissor arm, and a platform arranged sequentially from bottom to top. One side of the lower end of the scissor arm is hinged to the base frame, and the other side is hinged to a first slider, which is in sliding engagement with the base frame. One side of the upper end of the scissor arm is hinged to the platform, and the other side is hinged to a second slider, which is in sliding engagement with the platform.

[0006] The adjustment assembly includes a movable plate, whose horizontal position is adjusted by a horizontal adjustment mechanism around its perimeter; a rotating plate is rotatably mounted on the movable plate, whose rotation angle is adjusted by an angle adjustment mechanism on its inner side.

[0007] The leveling mechanism includes a third hydraulic cylinder mounted on the table. The third hydraulic cylinders are symmetrically arranged, and a connector is fixed to the output end of the third hydraulic cylinder. The connector slides in conjunction with a groove on the moving plate. Multiple ball bearings are installed at the lower end of the moving plate, and the ball bearings contact the end face of the table.

[0008] The connector includes a mounting part, and a rotating ring is rotatably connected to the outside of the mounting part.

[0009] The angle adjustment mechanism includes an adjustment motor, which is fixed inside the movable plate. A drive gear is coaxially mounted on the output end of the adjustment motor. A gear ring is fixed inside the rotating plate. Multiple intermediate gears are arranged between the gear ring and the drive gear. The intermediate gears are rotatably mounted on the upper end of the movable plate and mesh with the drive gear and the gear ring.

[0010] The clamping assembly includes a support frame, a support block fixed at the upper end of the support frame, and a clamping plate arranged on the support block. The clamping plate is driven by a fourth hydraulic cylinder.

[0011] The support block is U-shaped, and the clamping plate is a single plate that is directly opposite the vertical part on one side of the support block. A template is fixed on the clamping plate and the vertical part on the opposite side of the support block, and a gasket is provided on the opposite side of the two templates.

[0012] The lower end of the vehicle frame is also symmetrically provided with multiple auxiliary support components. Each auxiliary support component includes a second hydraulic cylinder. The extended end of the second hydraulic cylinder is provided with a disc, which is in contact with or detached from the ground.

[0013] A method for installing a steel arch frame for tunnel construction includes the following steps: Step 1: Place the steel arch frame on the clamping assembly and clamp it in place. Step 2: After the steel arch frame is fixed, the vehicle frame is moved to the installation position by the drive wheels, and the drive wheels are braked and limited by the brake assembly; after the device moves to the designated position, the second hydraulic cylinder drives the disc to descend, so that the disc contacts the ground and gradually lifts the vehicle frame until the drive wheels are just separated from the ground. Step 3: After the frame is fixed, the steel arch frame is raised to the installation height by the lifting assembly; at the same time, the horizontal position of the moving plate is adjusted by the horizontal adjustment mechanism; the rotation angle of the rotating plate on the moving plate is adjusted by the angle adjustment mechanism; after adjusting the height, horizontal position and angle, the steel arch frame is further moved to the most suitable position. Step 4: After the steel arch frame is moved to the most suitable position, the lifting assembly continues to lift it, fitting the steel arch frame against the inner wall of the tunnel, making it easier for the steel arch frame to be manually installed on the inner wall of the tunnel.

[0014] This invention provides a steel arch frame installation trolley and method for tunnel construction, which has the following technical advantages: 1) This invention achieves a wide range of vertical height adjustment of the platform by extending and retracting the scissor arm, adapting to the installation requirements of steel arch frames with different cross-sectional heights in tunnels, improving the versatility of the trolley, and the first hydraulic cylinder has the characteristics of strong stability and high load-bearing capacity through hydraulic drive, ensuring that the platform lifting process is uniform and controllable, avoiding swaying of the steel arch frame, and improving installation accuracy and safety.

[0015] 2) This invention achieves precise horizontal or vertical position adjustment of the steel arch frame by driving the moving plate to move horizontally on the platform, ensuring the alignment of the steel arch frame with the inner wall of the tunnel and improving the installation position accuracy. It also drives the rotating plate to rotate around the axis to achieve fine adjustment of the installation angle of the steel arch frame, meeting the angle matching requirements under the curved cross section or inclined working conditions of the tunnel, and effectively improving the installation fit and construction quality of the steel arch frame. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is the front view of the present invention.

[0018] Figure 3 This is a schematic diagram of the upper part of the tabletop in this invention.

[0019] Figure 4 This is a cross-sectional view of the countertop in this invention.

[0020] Figure 5 for Figure 2 A magnified view of a portion of point A in the middle.

[0021] Figure 6 This is a partial cross-sectional view of the movable plate in this invention.

[0022] In the diagram: Frame 1, Drive wheel 10, Auxiliary support assembly 11, Second hydraulic cylinder 110, Disc 111, Lifting assembly 2, Base frame 20, Scissor arm 21, Platform 22, First hydraulic cylinder 23, Adjustment assembly 3, Moving plate 30, Rotating plate 31, Horizontal adjustment mechanism 32, Third hydraulic cylinder 320, Connector 321, Mounting part 3210, Rotary ring 3211, Ball bearing 322, Angle adjustment mechanism 33, Adjustment motor 330, Drive gear 331, Gear ring 332, Intermediate gear 333, Clamping assembly 4, Support frame 40, Support block 41, Clamping plate 42, Fourth hydraulic cylinder 43, Guide rod 44, Profile plate 45. Detailed Implementation

[0023] like Figure 1 As shown, a steel arch frame installation trolley for tunnel construction includes a frame 1. Multiple sets of drive wheels 10 are mounted on the lower end of the frame 1, each equipped with a braking assembly for braking. A lifting assembly 2 is mounted at the middle of the upper end of the frame 1. An adjusting assembly 3 is mounted on the upper end of the lifting assembly 2, and a clamping assembly 4 is mounted on the upper end of the adjusting assembly 3. The lifting assembly 2 is used to adjust the height of the steel arch frame. The adjusting assembly 3 is used to adjust the horizontal angle and horizontal position of the steel arch frame. The clamping assembly 4 is used to clamp the steel arch frame.

[0024] like Figure 2 As shown, the lifting assembly 2 includes a base frame 20, on which a scissor arm 21 is mounted. A platform 22 is mounted on the upper end of the scissor arm 21. Both the base frame 20 and the platform 22 are hinged to one side of the scissor arm 21 and slidably connected to the other side. At least two first hydraulic cylinders 23 are rotatably mounted inside the scissor arm 21. The lifting assembly 2 is prior art, and its main structure is basically the same as that of a scissor hydraulic lift.

[0025] like Figures 3-5 As shown, the adjustment assembly 3 includes a movable plate 30, with a plurality of ball bearings 322 evenly arranged at its lower end. The movable plate 30 contacts the inner bottom surface of the groove at the upper end of the table surface 22 via the ball bearings 322. The horizontal position of the movable plate 30 is adjusted by a horizontal adjustment mechanism 32 around its perimeter. A rotating plate 31 is rotatably mounted on the upper end of the movable plate 30, and the horizontal angle of the rotating plate 31 is adjusted by an angle adjustment mechanism 33.

[0026] like Figure 4 As shown, the horizontal adjustment mechanism 32 includes multiple third hydraulic cylinders 320, which are symmetrically fixed on the platform 22 from left to right and front to back. The extended ends of the third hydraulic cylinders 320 are provided with connectors 321. The side of the corresponding movable plate 30 is provided with a sliding groove, and the connectors 321 are slidably disposed in the sliding groove.

[0027] During operation, the first hydraulic cylinder 23 drives the scissor arm 21, causing it to lift the steel arch frame to be installed to the vicinity of the installation position via the platform 22. Then, multiple third hydraulic cylinders 320 work in concert, extending or retracting their protruding ends, thereby moving the movable plate 30 on the platform 22. This allows for horizontal adjustment of the steel arch frame's installation position. Furthermore, as the movable plate 30 moves on the platform 22 under the control of the multiple third hydraulic cylinders 320, the ball bearings 322 at the lower end of the movable plate 30 reduce friction between the movable plate 30 and the platform 22, improving the responsiveness of the movable plate 30 and ensuring that the third hydraulic cylinders 320 can promptly move the movable plate 30 horizontally to adjust the steel arch frame's installation position. Furthermore, by having the connector 321 slide within the side groove of the moving plate 30, and by ensuring that the connector 321 remains within the groove, the extended end of the third hydraulic cylinder 320 can promptly drive the moving plate 30 to move in response via the connector 321, thus improving flexibility. On the other hand, this reduces or even eliminates the possibility of separation between the extended end of the third hydraulic cylinder 320 and the moving plate 30.

[0028] like Figure 4As shown, the connector 321 includes a mounting part 3210, which is slidably disposed in a groove, and a rotating ring 3211 is rotatably disposed on the outer side of the mounting part 3210.

[0029] Specifically, when the third hydraulic cylinder 320 drives the moving plate 30 to move horizontally, the connector 321 always moves within the slide groove, meaning that the mounting part 3210 and the rotating ring 3211 are always within the slide groove. The rotating ring 3211 can significantly reduce the friction between the mounting part 3210 and the slide groove, reducing or even preventing wear between the mounting part 3210 and the slide groove, thus extending the service life of the moving plate 30 and the mounting part 3210.

[0030] like Figure 5 As shown, the angle adjustment mechanism 33 includes an adjustment motor 330, which is fixed inside the movable plate 30. The output end of the adjustment motor 330 is provided with a drive gear 331. A gear ring 332 is fixed to the inner side of the lower end of the rotating plate 31. A plurality of intermediate gears 333 are provided between the gear ring 332 and the drive gear 331. The intermediate gears 333 are rotatably mounted on the upper end of the movable plate 30, and the intermediate gears 333 mesh with both the drive gear 331 and the gear ring 332.

[0031] By adjusting the motor 330 to drive the drive gear 331 to rotate, the drive gear 331 drives the multiple intermediate gears 333 meshing with it to rotate, which in turn drives the gear ring 332 to rotate, which in turn drives the rotating plate 31 to rotate on the moving plate 30. The rotating plate 31 adjusts the installation angle of the steel arch frame to be installed during rotation.

[0032] like Figure 3 As shown, the clamping assembly 4 is fixed to the upper end of the rotating plate 31, and the steel arch frame is placed on the clamping assembly 4 and clamped and fixed by the clamping assembly 4. Thus, when the horizontal adjustment mechanism 32 adjusts the horizontal position of the moving steel arch frame and the angle adjustment mechanism 33 adjusts the rotation angle of the rotating plate 31, the clamping assembly 4 can drive the steel arch frame to move synchronously with the moving plate 30 and the rotating plate 31.

[0033] like Figure 3 As shown, the clamping assembly 4 includes a support frame 40, a support block 41 is provided at the upper end of the support frame 40, the support block 41 is U-shaped, and a clamping plate 42 is slidably arranged on the inner side of the support block 41. One side of the clamping plate 42 is connected to the extended end of the fourth hydraulic cylinder 43. The fourth hydraulic cylinder 43 is mounted on a mounting plate on one side of the support block 41, and two guide rods 44 are symmetrically fixed on the clamping plate 42. The guide rods 44 freely pass through the support block 41, and the guide rods 44 and the fourth hydraulic cylinder 43 are on the same side.

[0034] Before installing the steel arch frame, the middle part of the steel arch frame is first placed on the support block 41. Then, the fourth hydraulic cylinder 43 drives the clamping plate 42 to move along the support block 41, so that the clamping plate 42 approaches and clamps the steel arch frame, thus locking the steel arch frame in place with the support block 41. This prevents the steel arch frame from shaking or detaching when it moves with the moving plate 30 or rotates with the rotating plate 31. Furthermore, when the clamping plate 42 moves along the support block 41, the guide rod 44 guides the clamping plate 42 during movement, preventing it from rotating.

[0035] Preferably, the clamping plate 42 and the support block 41 at the end away from the guide rod 44 are both fitted with a molded plate 45 by snap-fit, and a gasket is provided on the opposite side of the two molded plates 45.

[0036] The outer contour of the profile plate 45 adapts to steel arch frames of different shapes, such as I-beams, round tubes, and square tubes. Different profile plates 45 are used depending on the shape of the steel arch frame, creating a convex-concave fit between the profile plate 45 and the steel arch frame. This provides a more stable clamping and fixing of the steel arch frame, reducing or even preventing it from falling off during movement and adjustment. The shims effectively increase the friction between the profile plate 45 and the steel arch frame, ensuring a more secure clamping and fixing.

[0037] Preferably, a footboard is bolted to the side of the countertop 22, and a guardrail is provided on the edge of the footboard.

[0038] By installing a footboard on the side of the platform 22, when the first hydraulic cylinder 23 drives the platform 22 to rise or fall via the scissor arm 21, the platform 22 can drive the footboard to rise and fall synchronously. This makes it convenient for installers to sit on the footboard and cooperate with the equipment to complete the installation of the steel arch frame. The guardrail can effectively prevent installers from falling off the footboard.

[0039] like Figure 2 As shown, a plurality of auxiliary support components 11 are symmetrically arranged at the lower end of the frame 1. The auxiliary support components 11 include a plurality of second hydraulic cylinders 110, and the extended end of the second hydraulic cylinder 110 is provided with a disc 111.

[0040] After the frame 1 moves to the designated position via the drive wheel 10, the lifting assembly 2 and the adjusting assembly 3 are braked and limited by the braking assembly. Simultaneously, the second hydraulic cylinder 110 lowers the disc 111, causing it to contact the ground and gradually lift the frame 1 until the drive wheel 10 just separates from the ground. This allows the second hydraulic cylinder 110, in conjunction with the braking assembly, to limit the frame 1, preventing displacement during the installation of the steel arch frame and ensuring accurate installation. The disc 111 also increases the contact area between the second hydraulic cylinder 110 and the ground, reducing or even preventing the second hydraulic cylinder 110 from sinking into the ground while supporting the frame 1.

[0041] A method for installing a steel arch frame for tunnel construction includes the following steps: Step 1: The steel arch frame is placed on the clamping assembly 4 and clamped and fixed by the clamping assembly 4. In this way, when the horizontal adjustment mechanism 32 adjusts the horizontal position of the moving steel arch frame and the angle adjustment mechanism 33 adjusts the rotation angle of the rotating plate 31, the clamping assembly 4 can drive the steel arch frame to move synchronously with the moving plate 30 and the rotating plate 31.

[0042] Specifically, before installing the steel arch frame, the middle part of the steel arch frame is first placed on the support block 41. Then, the fourth hydraulic cylinder 43 drives the clamping plate 42 to move along the support block 41, so that the clamping plate 42 approaches and clamps the steel arch frame, preventing the steel arch frame from shaking or falling off when it moves with the moving plate 30 or rotates with the rotating plate 31. Furthermore, when the clamping plate 42 moves along the support block 41, the guide rod 44 guides the clamping plate 42 during movement, preventing the clamping plate 42 from rotating.

[0043] Step Two: After the steel arch frame is fixed, the vehicle frame 1 is moved to the installation position via the drive wheels 10. The drive wheels 10 are then braked and limited by the braking assembly to prevent movement of the vehicle frame 1 during the initial installation of the steel arch frame, which could lead to installation failure. Simultaneously, after the device moves to the installation position of the steel arch frame, the second hydraulic cylinder 110 drives the disc 111 to descend, causing the disc 111 to contact the ground and gradually lift the vehicle frame 1 until the drive wheels 10 are just separated from the ground. This allows the second hydraulic cylinder 110, in conjunction with the braking assembly, to limit the movement of the vehicle frame 1, preventing displacement during the installation of the steel arch frame and ensuring accurate installation. The disc 111 increases the contact area between the second hydraulic cylinder 110 and the ground, reducing or even preventing the second hydraulic cylinder 110 from sinking into the ground while supporting the vehicle frame 1.

[0044] Step 3: After the frame 1 is fixed, the first hydraulic cylinder 23 operates, causing the scissor arm 21 to lift the platform 22 vertically, so that the platform 22 can lift the steel arch frame to be installed to the installation height. Simultaneously, the horizontal adjustment mechanism 32 adjusts the horizontal position of the moving plate 30 on the platform 22; the angle adjustment mechanism 33 adjusts the rotation angle of the rotating plate 31 on the moving plate 30. Through height adjustment, horizontal position adjustment, and angle adjustment, the steel arch frame to be installed is moved to the most suitable position.

[0045] Specifically, the first hydraulic cylinder 23 drives the scissor arm 21 to work, causing the scissor arm 21 to lift the steel arch frame to be installed to the vicinity of the installation position via the platform 22. At this time, multiple third hydraulic cylinders 320 work in coordination, causing their extended ends to extend or retract in a coordinated manner. This allows the multiple third hydraulic cylinders 320 to control the movement of the moving plate 30 on the platform 22, thereby adjusting the installation position of the steel arch frame in the horizontal direction. When the moving plate 30 moves on the platform 22 under the control of the multiple third hydraulic cylinders 320, the ball bearings 322 at the lower end of the moving plate 30 can reduce the friction between the moving plate 30 and the platform 22, improve the responsiveness of the moving plate 30, and ensure that the third hydraulic cylinders 320 can promptly drive the moving plate 30 to move in the horizontal direction to adjust the installation position of the steel arch frame. The connector 321, which is provided at the extended end of the third hydraulic cylinder 320, is always in the groove. Compared with a fixed connection, it is more flexible and responds to movement in a timely manner during adjustment. It also reduces or even avoids the situation where the extended end of the third hydraulic cylinder 320 separates from the moving plate 30.

[0046] Specifically, by adjusting the motor 330 to drive the drive gear 331 to rotate, the drive gear 331 drives the multiple intermediate gears 333 meshing with it to rotate, thereby causing the intermediate gears 333 to drive the gear ring 332 to rotate, which in turn causes the gear ring 332 to drive the rotating plate 31 to rotate on the moving plate 30, so that the rotating plate 31 adjusts the installation angle of the steel arch frame to be installed during rotation.

[0047] Step 4: After the steel arch frame to be installed is moved to the most suitable position, the first hydraulic cylinder 23 drives the scissor arm 21 to continue working, so that the scissor arm 21 continues to drive the platform 22 to rise, thereby making the scissor arm 21 and the platform 22 fit the steel arch frame against the inner wall of the tunnel, making it convenient for manual installation of the steel arch frame on the inner wall of the tunnel.

Claims

1. A steel arch frame installation trolley for tunnel construction, comprising a frame (1), wherein multiple sets of drive wheels (10) are mounted on the lower end of the frame (1), characterized in that: The upper end of the frame (1) is fixed with a lifting component (2), and the adjustment component (3) is installed on the top of the lifting component (2) and raised or lowered by the lifting component (2); the clamping component (4) is installed on the top of the adjustment component (3) and the horizontal position and angle are adjusted by the adjustment component (3); the clamping component (4) clamps and fixes the steel arch frame.

2. The steel arch frame installation trolley for tunnel construction according to claim 1, characterized in that: The lifting assembly (2) includes a base frame (20), a scissor arm (21) and a platform (22) arranged sequentially from bottom to top. The lower end of the scissor arm (21) is hinged to the base frame (20) on one side and to the first slider on the other side. The first slider is slidably engaged with the base frame (20). The upper end of the scissor arm (21) is hinged to the platform (22) on one side and to the second slider on the other side. The second slider is slidably engaged with the platform (22).

3. The steel arch frame installation trolley for tunnel construction according to claim 2, characterized in that: The adjustment component (3) includes a movable plate (30), which adjusts its horizontal position through a horizontal adjustment mechanism (32) around its perimeter; a rotating plate (31) is rotatably mounted on the movable plate (30), and the rotating plate (31) adjusts its rotation angle through an angle adjustment mechanism (33) on its inner side.

4. A steel arch frame installation trolley for tunnel construction according to claim 3, characterized in that: The horizontal adjustment mechanism (32) includes a third hydraulic cylinder (320) mounted on the table (22). The third hydraulic cylinders (320) are symmetrically arranged. A connector (321) is fixed at the output end of the third hydraulic cylinder (320). The connector (321) slides in cooperation with the slide groove on the moving plate (30). A plurality of balls (322) are installed at the lower end of the moving plate (30). The balls (322) are in contact with the end face of the table (22).

5. A steel arch frame installation trolley for tunnel construction according to claim 4, characterized in that: The connector (321) includes a mounting part (3210), and a rotating ring (3211) is rotatably connected to the outside of the mounting part (3210).

6. A steel arch frame installation trolley for tunnel construction according to claim 3, characterized in that: The angle adjustment mechanism (33) includes an adjustment motor (330), which is fixed inside the movable plate (30). The output end of the adjustment motor (330) is coaxially mounted with a drive gear (331). A gear ring (332) is fixed inside the rotating plate (31). Multiple intermediate gears (333) are provided between the gear ring (332) and the drive gear (331). The intermediate gears (333) are rotatably mounted on the upper end of the movable plate (30). The intermediate gears (333) mesh with the drive gear (331) and the gear ring (332).

7. A steel arch frame installation trolley for tunnel construction according to claim 1, characterized in that: The clamping assembly (4) includes a support frame (40), a support block (41) is fixed at the upper end of the support frame (40), a clamping plate (42) is arranged on the support block (41), and the clamping plate (42) is driven by a fourth hydraulic cylinder (43).

8. A steel arch frame installation trolley for tunnel construction according to claim 7, characterized in that: The support block (41) is U-shaped, and the clamping plate (42) is a single one that is directly opposite the vertical part on one side of the support block (41). A mold plate (45) is fixed on the clamping plate (42) and the vertical part on the opposite side of the support block (41). A gasket is provided on the opposite side of the two mold plates (45).

9. A steel arch frame installation trolley for tunnel construction according to claim 5, characterized in that: The lower end of the frame (1) is also symmetrically provided with a plurality of auxiliary support components (11), each auxiliary support component (11) including a second hydraulic cylinder (110), the extended end of the second hydraulic cylinder (110) is provided with a disc (111), the disc (111) is in contact with or detached from the ground.

10. A method for installing a steel arch frame using a steel arch frame installation trolley for tunnel construction according to claim 9, comprising the following steps: Step 1: The steel arch frame is placed on the clamping assembly (4) and clamped and fixed by the clamping assembly (4); Step 2: After the steel arch frame is fixed, the frame (1) is moved to the installation position by the drive wheel (10), and the drive wheel (10) is braked and limited by the brake assembly; after the device is moved to the designated position, the second hydraulic cylinder (110) drives the disc (111) to descend, so that the disc (111) contacts the ground and gradually lifts the frame (1) until the drive wheel (10) is just separated from the ground; Step 3: After the frame (1) is fixed, the steel arch frame is raised to the installation height by the lifting assembly (2); at the same time, the horizontal position of the moving plate (30) is adjusted by the horizontal adjustment mechanism (32); the rotation angle of the rotating plate (31) on the moving plate (30) is adjusted by the angle adjustment mechanism (33); after the height adjustment, horizontal position adjustment and angle adjustment, the steel arch frame is further moved to the most suitable position. Step 4: After the steel arch frame is moved to the most suitable position, the lifting component (2) continues to lift, and the steel arch frame is attached to the inner wall of the tunnel, so that the steel arch frame can be manually installed on the inner wall of the tunnel.

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