Tunnel construction protection device

Abstract

The invention belongs to the technical field of tunnel construction, and particularly relates to a tunnel construction protection device which comprises a protection frame body and a protection curtain, and the protection curtain comprises a flexible connecting belt and a plurality of curtain cloth strips; the plurality of curtain cloth strips are uniformly distributed on the flexible connecting belt; a connecting piece is arranged at one end of the flexible connecting belt, and a limiting column is arranged at the other end of the flexible connecting belt; an arc-shaped supporting frame and an operation platform are arranged on the protection frame body, and a moving trolley and a mounting rail are arranged on the arc-shaped supporting frame; the moving trolley comprises a trolley body, a limiting lug plate and a limiting plate; the limiting plate is in sliding connection with the vehicle body, and a driving cylinder is arranged between the limiting plate and the vehicle body; the vehicle body is provided with a supporting wheel and a driving wheel which are connected with the arc-shaped supporting frame; a hook plate is fixed on the limiting plate, and after the connecting piece is connected with the hook plate, the flexible connecting belt is dragged to move along the mounting rail through the moving trolley; according to the device, through the detachable protection curtain, the moving trolley and other structures, quick switching between blasting protection and pipe shed construction is achieved.

Description

Technical Field

[0001] This invention belongs to the field of tunnel construction technology, and specifically relates to a tunnel construction protection device. Background Technology

[0002] Tunnel engineering is a crucial component in the construction of modern infrastructure such as transportation, water conservancy, and mining. Its construction environment is complex and its safety risks are high.

[0003] Blasting is a common method for breaking hard rock masses during tunnel excavation, but the flying rocks, shock waves, and dust generated by blasting pose a serious threat to construction personnel and equipment. Therefore, reliable protective devices must be installed in the blasting area. Furthermore, before entering the tunnel or traversing sections of weak surrounding rock, pipe roof support technology is often used for pre-reinforcement. This involves drilling holes, inserting steel pipes, and pouring concrete to form a support system to ensure the stability of the excavation face.

[0004] Currently, protective devices in tunnel construction mostly use fixed steel structure supports combined with simple shielding materials, such as steel plates or canvas. These traditional devices have significant shortcomings: First, they are functionally limited, with protective structures typically designed for blasting isolation or simple work platforms, making it difficult to adapt to the needs of multi-process cross-operations, resulting in low equipment utilization and cumbersome conversion. Second, they are inefficient to install, as protective curtains rely heavily on manual high-altitude laying and fixing, which is not only labor-intensive but also prone to displacement or detachment under blasting impact, leading to poor safety and reliability. Third, the drilling and pouring stages in pipe roof construction lack integrated auxiliary equipment, and the drill rod is prone to deviating from the design angle during drilling due to a lack of effective guidance, affecting the accuracy of the pipe roof. During concrete pouring, the pipe position needs to be repeatedly adjusted, increasing the difficulty and risk of the operation.

[0005] In summary, there is an urgent need in this field for a tunnel construction protection device that integrates blasting protection and pipe roof construction functions. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a tunnel construction protection device that integrates blast protection and pipe roof construction functions.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A tunnel construction protection device includes a protective frame and a protective curtain; The protective curtain includes a flexible connecting strip and several curtain strips; the several curtain strips are evenly distributed on the flexible connecting strip; one end of the flexible connecting strip is provided with a connector, and the other end of the flexible connecting strip is provided with a limiting post; the protective frame is provided with an arc-shaped support frame and an operating platform, and the arc-shaped support frame is provided with a moving trolley and an installation track; the flexible connecting strip is provided with a metal column; The mobile trolley includes a body, limiting ear plates, and a limiting plate; the limiting plate is slidably connected to the body, and a drive cylinder is provided between the limiting plate and the body; the body is provided with support wheels and drive wheels connected to an arc-shaped support frame; a hook plate is fixed on the limiting plate, and when the connector is connected to the hook plate, the flexible connecting belt is pulled by the mobile trolley to move along the installation track until the limiting post abuts against the installation track; when the hook plate contacts the installation track, it can prevent the movement of the body; the limiting ear plate is provided with an oblong hole, and the limiting plate is provided with a groove, forming a limiting hole between the groove and the oblong hole; a sliding plate is slidably connected to the body, a support post is fixedly connected to the sliding plate, and an auxiliary support tube is connected to the support post; a limiting component is provided on the support post.

[0008] The drive wheel is connected to a drive motor, and the housing of the drive motor is fixedly connected to the vehicle body; there are two support wheels, both of which are in contact with the outer surface of the mounting track; the arc-shaped support frame is provided with guide grooves that cooperate with the drive wheels.

[0009] The mobile trolley also includes auxiliary wheels, which are rotatably connected to the trolley body and contact the side of the mounting track.

[0010] The limiting ear plate is provided with a nozzle; at least two nozzles are provided.

[0011] The auxiliary support tube is rotatably connected to the support column, and a drive plate is fixed on the auxiliary support tube. The drive plate has an inclined surface. The limiting plate has a connecting column. When the connecting column moves, it cooperates with the inclined surface on the drive plate to push the auxiliary support tube to rotate. A first limiting block is fixed on the support column, and a second limiting block that cooperates with the first limiting block is provided on the auxiliary support tube.

[0012] The limiting assembly includes a first limiting rod and a second limiting rod, both of which are slidably connected to the support column. A spring is provided between the first limiting rod, the second limiting rod, and the support column. A tapered surface is provided at the end of both the first limiting rod and the second limiting rod. An adjusting column is threaded onto the support column. The front end of the adjusting column is conical and located between the ends of the first limiting rod and the second limiting rod. The adjusting column pushes the first limiting rod and the second limiting rod to move, so that the front end of the first limiting rod extends into the auxiliary support tube. The front end of the second limiting rod passes through the sliding plate and contacts the vehicle body.

[0013] It also includes a moving mechanism; the moving mechanism includes a moving frame and a driving mechanism; there are two driving mechanisms, which are respectively located on both sides of the moving frame; the moving frame is bolted to the protective frame body; The movable frame is equipped with a fixed plate; the fixed plate is fixedly connected to the movable frame; the movable frame is slidably connected to a movable plate, and the movable plate is connected to a telescopic cylinder. The telescopic cylinder drives the movable plate to move and clamp the lower ends of several curtain strips.

[0014] The movable frame is hinged to a support leg; the two ends of the telescopic cylinder are respectively hinged to the support leg and the movable plate.

[0015] The drive mechanism is a wheel-type mechanism.

[0016] The protective frame consists of a left frame and a right frame, which are connected by bolts.

[0017] Compared with the prior art, the beneficial effects of this invention are: This device, through its detachable protective curtain and mobile trolley structure, enables rapid conversion between blast protection and pipe roof construction. The protective curtain, composed of flexible connecting strips and fabric strips, is automatically pulled and installed along the installation track by the mobile trolley, eliminating the need for extensive manual high-altitude work. The flexible connecting strips incorporate embedded metal columns for enhanced support, and, combined with the friction-limiting mechanism between the hook plate and the installation track, effectively prevent the protective curtain from loosening and falling off under blast impact.

[0018] The mobile trolley is equipped with a limiting hole structure, and the hole diameter is adjusted by the drive cylinder to provide adjustable guidance for the drill rod, avoid deviation of the drilling angle, and ensure the positioning accuracy of the pipe roof construction; during the pouring operation, the trolley can drive the pouring pipe to move precisely, realizing alternating pouring from left to right.

[0019] The protective frame adopts a modular split design (such as left and right frames) for easy transportation and assembly; integrated nozzles spray dust to improve the working environment; limit components can quickly fix the pouring pipe and slide plate to improve operational safety; the drive plate and connecting column work together to realize automatic lifting and resetting of the pouring pipe.

[0020] The addition of a movable mechanism makes the entire device movable, adapting to the needs of different construction sections; the use of a movable plate to clamp the lower end of the fabric strip further enhances the overall impact resistance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the protective curtain in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of the protective curtain after installation in Embodiment 1 of the present invention; Figure 4 yes Figure 1 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of the structure of the mobile trolley in one direction in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the structure of the mobile trolley in another direction in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the connection structure between the auxiliary support tube and the sliding plate in Embodiment 1 of the present invention; Figure 8 yes Figure 7 A cross-sectional view of the structure shown; Figure 9 This is a schematic diagram of the overall structure in one direction of Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of the overall structure from another direction of Embodiment 2 of the present invention; Wherein: 1 is the protective frame, 10 is the left frame, 11 is the right frame, 2 is the protective curtain, 20 is the flexible connecting belt, 21 is the curtain strip, 22 is the connector, 23 is the limiting post, 24 is the metal post, 3 is the arc-shaped support frame, 4 is the operating platform, 5 is the mobile trolley, 50 is the trolley body, 51 is the limiting ear plate, 52 is the limiting plate, 53 is the support wheel, 54 is the drive wheel, 55 is the drive cylinder, 56 is the limiting hole, 57 is the hook plate, 58 is the sliding plate, 59 is the support post, 510 is the trolley body. 511 is the drive motor, 512 is the auxiliary wheel, 513 is the nozzle, 514 is the drive plate, 515 is the connecting column, 516 is the first limiting block, 517 is the second limiting block, 518 is the adjusting column, 519 is the auxiliary support tube, 520 is the first limiting rod, 521 is the second limiting rod, 6 is the mounting rail, 7 is the moving mechanism, 70 is the moving frame, 71 is the drive mechanism, 72 is the fixed plate, 73 is the movable plate, 74 is the telescopic cylinder, and 75 is the support leg. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Example 1 like Figures 1 to 3 As shown, a tunnel construction protection device includes a protective frame 1 and a protective curtain 2. The protective frame 1 mainly serves a supporting function; the protective curtain 2 mainly serves a protective function. The protective curtain 2 is a detachable structure and can be installed on the protective frame 1 as needed, specifically through the following structure.

[0024] The protective curtain 2 includes a flexible connecting strip 20 and several curtain strips 21; the several curtain strips 21 are evenly distributed on the flexible connecting strip 20. The flexible connecting strip 20 can be bent and deformed, and metal pillars 24 are embedded in the flexible connecting strip 20.

[0025] A connector 22 is provided at one end of the flexible connecting strip 20, and a limiting post 23 is provided at the other end of the flexible connecting strip 20. An arc-shaped support frame 3 and an operating platform 4 are provided on the protective frame 1. A moving trolley 5 and an installation track 6 are provided on the arc-shaped support frame 3. The installation track 6 is used to install the flexible connecting strip 20, and the aforementioned metal post 24 provides support to prevent the flexible connecting strip 20 from being dislodged from the installation track 6 by external force. The connector 22 can be a hook, rope loop, etc.

[0026] like Figures 4 to 6 As shown, the mobile trolley 5 includes a body 50, a limiting ear plate 51, and a limiting plate 52; the limiting plate 52 is slidably connected to the body 50, and a drive cylinder 55 is provided between the limiting plate 52 and the body 50; both ends of the drive cylinder 55 are fixedly connected to the limiting plate 52 and the body 50, respectively. The limiting plate 52 can be moved by the extension and retraction of the drive cylinder 55.

[0027] The vehicle body 50 is equipped with a support wheel 53 and a drive wheel 54 connected to the arc-shaped support frame 3. The arc-shaped support frame 3 is located between the support wheel 53 and the drive wheel 54, meaning that the vehicle body 50 can be "clamped" on the arc-shaped support frame 3 by the support wheel 53 and the drive wheel 54. The rotation of the drive wheel 54 drives the vehicle body 50 to move along the arc-shaped support frame 3.

[0028] A hook plate 57 is fixed on the limiting plate 52. After the connector 22 is connected to the hook plate 57, one end of the flexible connecting strip 20 is manually inserted into the installation track 6. Then, the flexible connecting strip 20 is pulled along the installation track 6 by the moving trolley 5 until the limiting post 23 abuts against the installation track 6, completing the installation of the flexible connecting strip 20. The curtain strip 21 hangs down under the action of gravity to form a protective barrier, blocking the debris generated by the blast and playing a buffering role. The curtain strip 21 can be made of rubber.

[0029] When the piston rod of the drive cylinder 55 moves, causing the hook plate 57 to contact the mounting rail 6, the friction between the hook plate 57 and the mounting rail 6 will hinder the movement of the vehicle body 50. Therefore, if the vehicle body 50 needs to stop at any position on the arc-shaped support frame 3, it can do so by having the hook plate 57 contact the mounting rail 6.

[0030] The flexible connecting belt 20 is moved along the installation track 6 by the trolley 5 until the limit post 23 abuts against the installation track 6. Then, the hook plate 57 contacts the installation track 6 to prevent the trolley 50 from moving the flexible connecting belt 20 at will and to prevent it from loosening.

[0031] When the protective curtain 2 is installed, the protective device can be used for protective operations during blasting operations; when the protective curtain 2 is not installed, the protective device can also be used for tunnel pipe roof construction operations.

[0032] Specifically: The protective frame 1 is placed at the opening where pipe shed construction is required; the protective frame 1 is equipped with an operating platform 4, on which workers can stand to carry out construction work.

[0033] The limiting ear plate 51 has an oblong hole, and the limiting plate 52 has a groove, forming a limiting hole 56 between the groove and the oblong hole. This limiting hole 56 can serve as a limiting and guiding function during the drilling operation (using a down-the-hole drill) of the pipe shed. Since the limiting plate 52 can be moved by the drive cylinder 55, the size of the limiting hole 56 can be adjusted as needed.

[0034] During the drilling operation, the size of the limiting hole 56 formed by the moving limit plate 52 can be reduced, allowing the drill rod to have less room to move and preventing angular deviation. When the drilling angle is incorrect, the limit plate 52 moves in the opposite direction to increase the size of the limiting hole 56, allowing the drill rod to have more room to move and thus adjust the angle.

[0035] During the construction of the pipe shed, concrete pouring is also required; the concrete pouring is generally done by alternating pouring from left to right (there are two pouring ports on the left and right sides above the formwork).

[0036] A sliding plate 58 is slidably connected to the vehicle body 50, and a support column 59 is fixedly connected to the sliding plate 58. An auxiliary support pipe 519 is connected to the support column 59; a limiting component is provided on the support column 59. When pouring is required, the sliding plate 58 is pushed to move so that the opening of the auxiliary support pipe 519 is aligned with the limiting ear plate 51; then the pouring pipe is passed through the oblong hole of the limiting ear plate 51 and the auxiliary support pipe 519 in sequence and extends out; finally, the position of the pouring pipe and the sliding plate 58 is fixed by the limiting component.

[0037] In this way, during the alternating pouring operation, the pouring pipe can be moved left and right by the movement of the vehicle body 50, which helps to complete the pouring operation.

[0038] Furthermore, such as Figure 1 As shown, for ease of transportation, the protective frame 1 includes a left frame 10 and a right frame 11, which are connected by bolts. Similarly, the arc-shaped support frame 3 can also be divided into left and right parts.

[0039] Furthermore, such as Figure 5 As shown, the drive wheel 54 is connected to the drive motor 510, and the housing of the drive motor 510 is fixedly connected to the vehicle body 50; two support wheels 53 are provided, and both support wheels 53 are in contact with the outer surface of the mounting rail 6; the arc-shaped support frame 3 is provided with a guide groove that cooperates with the drive wheel 54, and the drive wheel 54 is located in the guide groove. The output shaft of the drive motor 510 is fixedly connected to the drive wheel 54, and the drive motor 510 drives the drive wheel 54 to rotate.

[0040] Furthermore, such as Figure 4 and Figure 5 As shown, the mobile trolley 5 also includes an auxiliary wheel 511, which is rotatably connected to the trolley body 50 and contacts the side of the mounting track 6.

[0041] Furthermore, such as Figure 4 As shown, a nozzle 512 is provided on the limiting ear plate 51; at least two nozzles 512 are provided. The nozzles 512 are connected to water pipes and water pumps; when drilling operations are performed, dust is suppressed by spraying water through the nozzles 512.

[0042] Furthermore, such as Figures 4 to 6 As shown, the auxiliary support pipe 519 is rotatably connected to the support column 59. A drive plate 513 is fixed on the auxiliary support pipe 519, and the drive plate 513 has an inclined surface. A connecting column 514 is provided on the limiting plate 52. During the alternating pouring operation, when it is necessary to transfer from the left pouring port to the right pouring port, the piston rod of the drive cylinder 55 moves, driving the limiting plate 52 and the connecting column 514 to move. After the connecting column 514 moves, it cooperates with the inclined surface on the drive plate 513 to push the auxiliary support pipe 519 to rotate upward, lifting the pouring pipe and moving it out of the left pouring port.

[0043] A first limiting block 515 is fixed on the support column 59, and a second limiting block 516 that cooperates with the first limiting block 515 is provided on the auxiliary support pipe 519. When it moves to the right pouring port, the piston rod of the drive cylinder 55 moves, causing the limiting plate 52 and the connecting column 514 to move in the opposite direction; under the gravity of the pouring pipe, the auxiliary support pipe 519 is driven to rotate downward until the second limiting block 516 contacts the first limiting block 515, at which point the pouring pipe extends into the right pouring port.

[0044] It should be noted that after the piston rod of the drive cylinder 55 moves, causing the limit plate 52 and the connecting column 514 to move, there is still a certain gap between the hook plate 57 and the mounting rail 6, which will not hinder the movement of the vehicle body 50.

[0045] Furthermore, such as Figure 7 and Figure 8 As shown, the limiting assembly includes a first limiting rod 520 and a second limiting rod 521. Both the first limiting rod 520 and the second limiting rod 521 are slidably connected to the support column 59. A spring 517 is provided between the first limiting rod 520 and the second limiting rod 521 and the support column 59. The ends of the first limiting rod 520 and the second limiting rod 521 are provided with a conical surface.

[0046] An adjusting column 518 is threaded onto the support column 59. The front end of the adjusting column 518 is conical and is located between the ends of the first limiting rod 520 and the second limiting rod 521. The front end of the adjusting column 518 can contact the conical surfaces of the ends of the first limiting rod 520 and the second limiting rod 521.

[0047] When it is necessary to fix the position of the pouring pipe and the slide plate 58, simply rotate the adjusting column 518. The adjusting column 518 moves forward, pushing the first limiting rod 520 and the second limiting rod 521 to move, so that the front end of the first limiting rod 520 extends into the auxiliary support pipe 519 and contacts the pouring pipe, and the front end of the second limiting rod 521 passes through the slide plate 58 and contacts the vehicle body 50; thereby achieving the fixation of the position of the pouring pipe and the slide plate 58.

[0048] Example 2 To facilitate overall movement during blast protection, a moving mechanism 7 was added based on Example 1.

[0049] like Figures 9 to 10 As shown, the moving mechanism 7 includes a moving frame 70 and a drive mechanism 71; there are two drive mechanisms 71, which are respectively located on both sides of the moving frame 70. The moving frame 70 is bolted to the protective frame body 1 and can be disassembled as needed; it is connected for blast protection and disassembled for pipe shed construction.

[0050] A fixed plate 72 is provided on the movable frame 70; the fixed plate 72 is fixedly connected to the movable frame 70; a movable plate 73 is slidably connected to the movable frame 70, and a telescopic cylinder 74 is connected to the movable plate 73. When used for blast protection, the lower ends of several curtain strips 21 are placed between the movable plate 73 and the fixed plate 72; and the telescopic cylinder 74 drives the movable plate 73 to move and clamp the lower ends of several curtain strips 21, thereby fixing them and preventing the curtain strips 21 from moving randomly due to impact from gravel during the blast.

[0051] Furthermore, a support leg 75 is hinged to the movable frame 70; the two ends of the telescopic cylinder 74 are respectively hinged to the support leg 75 and the movable plate 73. When used for blast protection, the piston rod of the telescopic cylinder 74 extends, which can push the movable plate 73 to move on the one hand, and drive the support leg 75 to rotate on the other hand, so that the support leg 75 contacts the ground and plays a supporting role.

[0052] Furthermore, the aforementioned drive mechanism 71 can be a wheeled mechanism, or of course, a tracked mechanism.

[0053] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. A tunnel construction protection device, characterized in that: The protective frame body (1) and the protective curtain (2) are included. The protective curtain (2) includes a flexible connecting belt (20) and a plurality of curtain strips (21); the plurality of curtain strips (21) are evenly distributed on the flexible connecting belt (20); one end of the flexible connecting belt (20) is provided with a connecting piece (22), and the other end of the flexible connecting belt (20) is provided with a limiting column (23); the protective frame body (1) is provided with an arc-shaped support frame (3) and an operation platform (4), the arc-shaped support frame (3) is provided with a moving trolley (5) and a mounting rail (6); the flexible connecting belt (20) is provided with a metal column (24). The moving trolley (5) includes a trolley body (50), a limiting lug plate (51) and a limiting plate (52); the limiting plate (52) is in sliding connection with the trolley body (50), and a driving cylinder (55) is arranged between the limiting plate (52) and the trolley body (50); the trolley body (50) is provided with a supporting wheel (53) connected with the arc-shaped support frame (3) and a driving wheel (54); the limiting plate (52) is fixedly provided with a hook plate (57), when the connecting piece (22) is connected with the hook plate (57), the flexible connecting belt (20) is pulled by the moving trolley (5) to move along the mounting rail (6) until the limiting column (23) abuts against the mounting rail (6); when the hook plate (57) contacts the mounting rail (6), the trolley body (50) can be hindered from moving; the limiting lug plate (51) is provided with a waist-shaped hole, the limiting plate (52) is provided with a groove, and the limiting hole (56) is formed between the waist-shaped hole and the groove; the trolley body (50) is in sliding connection with a sliding plate (58), the sliding plate (58) is fixedly connected with a supporting column (59), and the supporting column (59) is connected with an auxiliary supporting pipe (519); the supporting column (59) is provided with a limiting assembly.

2. A tunnel construction protection device according to claim 1, characterised in that: The driving wheel (54) is connected with a driving motor (510), and the shell of the driving motor (510) is fixedly connected with the trolley body (50); the supporting wheel (53) is provided with two, and the two supporting wheels (53) are in contact with the outer surface of the mounting rail (6); the arc-shaped support frame (3) is provided with a guide groove matched with the driving wheel (54).

3. A tunnel construction protection device according to claim 1 or 2, characterised in that: The moving trolley (5) further includes an auxiliary wheel (511), the auxiliary wheel (511) is in rotary connection with the trolley body (50), and the auxiliary wheel (511) is in contact with the side surface of the mounting rail (6).

4. A tunnel construction protection device according to claim 1, characterized in that: The limiting lug plate (51) is provided with a spray head (512); the spray head (512) is provided with at least two.

5. The tunnel construction protection apparatus according to claim 1, wherein: The auxiliary supporting pipe (519) is in rotary connection with the supporting column (59), the auxiliary supporting pipe (519) is fixedly provided with a driving plate (513), and the driving plate (513) is provided with an inclined surface; the limiting plate (52) is provided with a connecting column (514); when the connecting column (514) moves, the connecting column (514) cooperates with the inclined surface on the driving plate (513) to push the auxiliary supporting pipe (519) to rotate; The supporting column (59) is fixedly provided with a first limiting block (515), and the auxiliary supporting pipe (519) is provided with a second limiting block (516) matched with the first limiting block (515).

6. A tunnel construction protection device according to claim 1, characterized in that: The limiting assembly comprises a first limiting rod (520) and a second limiting rod (521), both of which are in sliding connection with the support column (59), and a spring (517) is arranged between the first limiting rod (520), the second limiting rod (521) and the support column (59); the end of the first limiting rod (520) and the end of the second limiting rod (521) are both provided with a conical surface; The support column (59) is threadedly connected with an adjusting column (518), the front end of the adjusting column (518) is conical, and is located between the ends of the first limiting rod (520) and the second limiting rod (521); the adjusting column (518) pushes the first limiting rod (520) and the second limiting rod (521) to move, so that the front end of the first limiting rod (520) extends into the auxiliary support pipe (519); the front end of the second limiting rod (521) penetrates through the sliding plate (58) and contacts the vehicle body (50).

7. A tunnel construction protection device according to claim 1, characterized in that: Further comprising a moving mechanism (7); the moving mechanism (7) comprises a moving frame (70) and a driving mechanism (71); the driving mechanism (71) is provided with two, and the two driving mechanisms (71) are respectively arranged on the two sides of the moving frame (70); the moving frame (70) is bolted with the protection frame body (1); The moving frame (70) is provided with a fixed plate (72); the fixed plate (72) is fixedly connected with the moving frame (70); the moving frame (70) is slidingly connected with a movable plate (73), the movable plate (73) is connected with an extension cylinder (74), and the movable plate (73) is driven to move by the extension cylinder (74) to clamp the lower ends of the plurality of curtain strips (21).

8. A tunnel construction protection device according to claim 7, characterised in that: The moving frame (70) is hingedly connected with a support foot stand (75); the two ends of the extension cylinder (74) are respectively hingedly connected with the support foot stand (75) and the movable plate (73).

9. A tunnel construction protection device according to claim 7, characterised in that: The driving mechanism (71) adopts a wheel type mechanism.

10. The tunnel construction protection apparatus of claim 1, wherein: The protection frame body (1) comprises a left frame body (10) and a right frame body (11), and the left frame body (10) and the right frame body (11) are connected by bolts.

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