A type of scaffolding for tunnel construction and its construction method

Abstract

This invention provides a scaffold for tunnel construction and a construction method, belonging to the technical field of tunnel construction scaffolding. Its structure includes a movable base, with a lifting arm main body vertically arranged in the center of the top surface of the movable base. A lifting and rotating basket mechanism is mounted on the upper end of the lifting arm main body. Two longitudinal sliding seat assemblies are symmetrically arranged on the front and rear sides of the lower end of the lifting arm main body. A combined beam-rail mechanism is horizontally mounted between the two longitudinal sliding seat assemblies. The lifting arm main body assists in realizing the overall lifting and lowering function of the lifting and rotating basket mechanism, facilitating the height adjustment of the lifting and rotating basket mechanism. This ensures that the basket main body has sufficient height for construction of the tunnel dome, enabling the equipment to achieve adaptability, free adjustment, and displacement for the construction of the tunnel's arc-shaped dome, making construction more time-saving and labor-saving, and effectively reducing construction risks.

Description

Technical Field

[0001] This invention relates to a scaffold for tunnel construction and a construction method thereof, belonging to the technical field of tunnel construction scaffolding. Background Technology

[0002] As society continues to develop, the convenience of travel is constantly being updated. When building highways in mountainous areas, it is necessary to excavate tunnels to shorten the distance between two places. After the tunnel excavation is completed, the inner side of the tunnel needs to be constructed, which requires the use of scaffolding for auxiliary work.

[0003] Existing scaffolding using couplers is constructed from multiple steel pipes, making assembly and disassembly extremely cumbersome when erected in tunnels. Furthermore, tunnels typically have arched domes, and due to the inconsistent heights of these domes, scaffolding needs to be disassembled and re-adjusted after each lateral movement, a tedious, time-consuming, and labor-intensive process. While using construction cranes requires highly skilled operators, the dim lighting in tunnels often leads to crane railings colliding with tunnel walls, posing a significant risk to workers inside. To address these shortcomings, this invention proposes a new type of scaffolding and construction method for tunnel construction. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a scaffold for tunnel construction and a construction method to solve the existing problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a scaffold for tunnel construction, the structure of which includes a movable base, and a lifting arm body is vertically arranged in the middle of the top surface of the movable base, and a lifting and rotating basket mechanism is mounted on the upper end of the lifting arm body. Two longitudinal sliding seat groups are symmetrically arranged on the front and rear sides of the lower end of the lifting arm body, and a combined beam and rail mechanism is horizontally mounted between the two longitudinal sliding seat groups. The left and right tail parts of the combined beam and rail mechanism respectively buffer and roll against the side wall of the tunnel. The lifting and rotating basket mechanism is also provided with a control box that is electrically connected to the lifting arm body, the lifting and rotating basket mechanism, and the combined beam and rail mechanism.

[0006] The lifting and rotating basket mechanism includes a rotator, on which a specific gravity basket frame structure is mounted. A lifting support seat assembly is provided in the middle of the bottom surface of the specific gravity basket frame structure. The rotator is fixed to the top surface of the lifting arm body, and the lifting support seat assembly is fixed to the middle arm body of the lifting arm body. The basket body is movably mounted on the right side of the specific gravity basket frame structure. Two first winches for winding, unwinding, and lifting the basket body are suspended on the front and rear sides between the basket body and the specific gravity basket frame structure.

[0007] The combined beam-rail mechanism includes two combined beam-rail bodies, which are laterally mounted on two longitudinal sliding blocks. The left and right tail sections of the two combined beam-rail bodies are respectively longitudinally connected to a first abutment frame and a second abutment frame for buffering and rolling against the sidewall of the tunnel. The first abutment frame, the second abutment frame and the lifting arm body are connected to a second winch and a third winch for laterally pulling the movable base and moving the lifting arm body left and right.

[0008] A further improvement is that the specific gravity suspended basket frame structure includes a specific gravity top frame assembly and a rotating support base frame arranged vertically. Multiple suspended basket lifting sliding columns for stabilizing the lifting and lowering of the main body of the suspended basket are vertically connected on the right side between the specific gravity top frame assembly and the rotating support base frame. Multiple rotating tension columns are vertically spaced on the right side between the specific gravity top frame assembly and the rotating support base frame.

[0009] A further improvement is that the specific gravity top frame assembly includes a cross frame, and multiple specific gravity blocks are fitted on the left side of the cross frame to make the weight of the lifting and rotating basket mechanism equal on both sides. The right side of the cross frame has a basket opening in the middle to prevent the basket body from getting stuck after it rises.

[0010] A further improvement is that the rotating support base includes a turntable fixed to the top surface of the lifting support seat assembly, and the top surface of the turntable is fitted with the base body, and a support triangle and support pulley are provided on the right side of the bottom surface of the base body, and a first lifting channel is opened through the middle of the base body.

[0011] A further improvement is that the lifting support assembly includes a support body, and the top surface of the support body has multiple sliding column through holes aligned in a cross shape. The side surface of the support body has an annular support groove for rotating and rolling with the support pulley. The top surface of the support body has a second lifting channel aligned with the first lifting channel. Each sliding column through hole is fitted with a sliding column for fixing to the main body of the lifting arm, so that the support body can only be lifted vertically.

[0012] A further improvement is that each of the longitudinal sliding blocks includes a longitudinal sliding block body, and the left side of the longitudinal sliding block body has a fitting opening, and the front side of the longitudinal sliding block body has a through-hole for the beam rail. The beam rail through-hole is square, and multiple beam rail support rollers are fitted diagonally inside the beam rail through-hole. Multiple auxiliary brackets and a first universal moving wheel are obliquely arranged on the right side of the longitudinal sliding block body, and a traction head is arranged in the middle of the right side of the longitudinal sliding block body.

[0013] A further improvement is that both of the combined beam rail bodies are composed of multiple beam rail segments that are laterally aligned and spliced ​​together. The length of each beam rail segment is 80-100cm, and the beam rail segment is a square tube. The four opposite corners of the beam rail segment are provided with a travel abutment surface for forming a rolling abutment with the beam rail support roller. Multiple bolt splicing seats are provided on the upper, lower, left, and right ends of the beam rail segment.

[0014] A further improvement is that the first abutment frame includes a wall abutment frame, and multiple buffer abutment components are spaced apart on the left side of the wall abutment frame. The bottom surface of the wall abutment frame is vertically provided with a support frame for horizontally supporting the tail of the two combined beam rail bodies and a second omnidirectional moving wheel. The first abutment frame and the second abutment frame have the same structure.

[0015] Further improvements are made to the fact that the mobile base, lifting arm body, control box, rotator, basket body, first winch, second winch, third winch and buffer wheel are all existing technologies, and their structures and functions will not be described in detail here.

[0016] A further improvement is that the wheels on the bottom surface of the movable base are omnidirectional wheels.

[0017] A further improvement is that the wheel built into the buffer wheel is a rubber wheel.

[0018] Furthermore, this invention also provides a construction method for the aforementioned scaffolding used in tunnel construction, the construction method being as follows:

[0019] During installation, simply attach the two combined beam rail bodies of the two longitudinal sliding blocks to the tunnel width and splice them horizontally. Then, attach the first and second abutment frames between the tail ends of the two combined beam rail bodies to form a rolling abutment with the tunnel sidewalls. Finally, hook the wire ropes on the second and third winches to the left and right sides of the lifting arm body and assemble it entirely within the tunnel.

[0020] When constructing the middle section of the tunnel sidewall, it is only necessary to use two first winches to simultaneously wind up and drive the main body of the suspended platform vertically. When the main body of the suspended platform rises, in order to prevent the main body of the suspended platform from colliding with the curved sidewall of the tunnel, the second and third winches need to be coordinated to drive the moving base and the main body of the lifting arm to be stably moved laterally on the longitudinal sliding seat body and the combined beam rail mechanism. In addition, when the main body of the suspended platform needs to be switched to the left or right, the rotating device drives the specific gravity suspended platform frame structure to rotate. During this process, the rotating support base frame will also follow the lifting support seat group to perform a circular rolling rotation, which can realize the switching of the main body of the suspended platform to the left or right for construction of the middle section of the other sidewall of the tunnel.

[0021] When constructing the tunnel's arched dome, the main body of the suspended platform is first raised to its highest point. Then, by raising the main body of the lifting arm, the entire frame structure of the gravity suspended platform is vertically pushed up, and the lifting support assembly is also vertically pushed up together. This ensures that the lifting support assembly always provides stable load-bearing support to the rotating support base frame below the main body of the suspended platform. Furthermore, through the coordinated winding and unwinding of the second and third winches, the moving base and the main body of the lifting arm are driven to perform stable lateral movement and adjustment on the longitudinal sliding body and the combined beam and rail mechanism, facilitating the lateral construction adjustment of the tunnel's arched dome.

[0022] In addition, the longitudinal movement of this equipment is achieved by pulling it back and forth using an external tractor. During the longitudinal movement, the first and second abutment frames roll against the curved side of the tunnel, and the auxiliary brackets on the longitudinal sliding block and the front and rear supports of the first omnidirectional moving wheel provide support, preventing the equipment from tilting back and forth during longitudinal movement.

[0023] The beneficial effects of this invention are:

[0024] This invention provides a scaffold for tunnel construction and a construction method. Through a structural combination design of a movable base, a lifting arm main body, a lifting and rotating suspended platform mechanism, a longitudinal sliding seat assembly, a combined beam-rail mechanism, and a control box, a tunnel construction scaffold is constructed. The lifting arm main body assists in the overall lifting and lowering function of the lifting and rotating suspended platform mechanism, facilitating height adjustment and ensuring the suspended platform has sufficient height to construct the tunnel dome. The suspended platform itself, built into the lifting and rotating platform mechanism, has a lifting function, allowing for maximum lowering of the platform. It also has a rotation function, facilitating construction at the mid-section of the left and right sidewalls of the tunnel, while the lower section of the tunnel sidewalls does not require scaffolding assistance. In addition to the construction process, the coordinated arrangement of the longitudinal sliding seat assembly and the combined beam rail mechanism forms a lateral buffer and rolling support for the main body of the lifting arm. It also allows the second and third winches, which drive the lateral winding of the main body of the lifting arm, to be fixed on the same horizontal line as the main body of the lifting arm. This ensures that when the main body of the lifting arm is pushed longitudinally during construction, the second and third winches can also move longitudinally synchronously, eliminating the need for additional passive position adjustments. Ultimately, this achieves lateral horizontal pulling of the main body of the lifting arm to assist the lateral movement of the suspended platform during construction. This allows the equipment to be adaptably adjusted and displaced for the construction of tunnel arch domes, making construction more time-saving and labor-saving, and effectively reducing construction risks. Attached Figure Description

[0025] Figure 1 This is a diagram illustrating the installation effect of a tunnel construction scaffold inside a tunnel according to the present invention.

[0026] Figure 2 This is a schematic diagram of the lifting and rotating basket mechanism of the present invention;

[0027] Figure 3 This is a schematic diagram of the rotating support base structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the lifting support assembly structure of the present invention;

[0029] Figure 5 This is a left view of the assembly of the lifting arm body, longitudinal sliding seat group, and combined beam and rail mechanism of the present invention.

[0030] Figure 6 This is a schematic diagram of the first anti-wheel frame structure of the present invention;

[0031] Figure 7 For the present invention Figure 5 Enlarged view of section A in the middle. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] Please see Figures 1-7 This invention provides a scaffold for tunnel construction and a construction method thereof: its structure includes a movable base 1, and a lifting arm body 2 is vertically arranged in the middle of the top surface of the movable base 1. A lifting and rotating basket mechanism 3 is mounted on the upper end of the lifting arm body 2. Two longitudinal sliding seat groups 4 are symmetrically arranged on the front and rear sides of the lower end of the lifting arm body 2. A combined beam-rail mechanism 5 is horizontally mounted between the two longitudinal sliding seat groups 4. The left and right tail parts of the combined beam-rail mechanism 5 are respectively buffered and rolled against the side wall of the tunnel. The lifting and rotating basket mechanism 3 is also provided with a control box 6 that is electrically connected to the lifting arm body 2, the lifting and rotating basket mechanism 3, and the combined beam-rail mechanism 5. The lifting and rotating basket mechanism 3 includes a rotator 31, and a specific gravity basket frame structure 32 is mounted on the rotator 31. A lifting support seat group 33 is arranged in the middle of the bottom surface of the specific gravity basket frame structure 32. The lifting support seat 33 is fixedly mounted on the top surface of the lifting arm body 2. The lifting support seat 33 is fixedly mounted on the middle arm body of the lifting arm body 2. The basket body 34 is movably mounted on the right side of the gravity basket frame structure 32. Two first winches 35 for winding and lifting the basket body 34 are hoisted on the front and rear sides between the basket body 34 and the gravity basket frame structure 32. The combined beam rail mechanism 5 includes two combined beam rail bodies 51. The combined beam rail bodies 51 are transversely mounted on two longitudinal sliding seat assemblies 4. The left and right tails of the two combined beam rail bodies 51 are respectively longitudinally connected to the first abutment frame 52 and the second abutment frame 53 for buffering and rolling against the side wall of the tunnel. The first abutment frame 52, the second abutment frame 53 and the lifting arm body 2 are connected to the second winch 54 and the third winch 55 for transversely pulling the moving base 1 and the lifting arm body 2 to move left and right.

[0034] The specific gravity suspended basket frame structure 32 includes a specific gravity top frame assembly 321 and a rotating support base frame 322 arranged vertically. Multiple suspended basket lifting slide columns 323 for stabilizing the lifting and lowering of the suspended basket body 34 are vertically connected on the right side between the specific gravity top frame assembly 321 and the rotating support base frame 322. Multiple rotating support columns 324 are vertically connected at intervals on the right side between the specific gravity top frame assembly 321 and the rotating support base frame 322.

[0035] The specific gravity top frame assembly 321 includes a horizontal frame 3211, and a plurality of specific gravity blocks 3212 are fitted on the left side of the horizontal frame 3211 to make the weight of the lifting and rotating basket mechanism 3 equal on the left and right sides. The middle of the right side of the horizontal frame 3211 is provided with a basket opening 3213 to prevent the basket body 34 from getting stuck after it rises.

[0036] The rotating support base 322 includes a turntable 3221 fixed to the top surface of the lifting support seat 33. The top surface of the turntable 3221 is fitted with the base body 3222, and the bottom right side of the base body 3222 is provided with a support triangle 3223 and a support pulley 3224. The base body 3222 has a first lifting channel 3225 through the middle.

[0037] The lifting support assembly 33 includes a support body 331. The top surface of the support body 331 has multiple sliding column through holes 332 aligned in a cross shape. The side surface of the support body 331 has an annular support groove 333 for rotating and rolling with the support pulley 3224. The top surface of the support body 331 has a second lifting channel 334 aligned with the first lifting channel 3225. Each sliding column through hole 332 is fitted with a sliding column 335 for fixing to the lifting arm body 2, so that the support body 331 can only be lifted vertically.

[0038] Each of the longitudinal sliding block assemblies 4 includes a longitudinal sliding block body 41, and the left side of the longitudinal sliding block body 41 has a fitting opening 42, and the front side of the longitudinal sliding block body 41 has a through beam rail through opening 43. The beam rail through opening 43 is a square opening, and multiple beam rail support rollers 44 are fitted diagonally inside the beam rail through opening 43. Multiple auxiliary brackets 45 and a first universal moving wheel 46 are obliquely arranged on the right side of the longitudinal sliding block body 41, and a traction head 47 is arranged in the middle of the right side of the longitudinal sliding block body 41.

[0039] Both of the combined beam rail bodies 51 are composed of multiple beam rail segments 511 that are laterally aligned and spliced ​​together. The length of each beam rail segment 511 is 80-100cm, and the beam rail segment 511 is a square tube. The four opposite corners of the beam rail segment 511 are provided with a travel abutment surface 512 for forming a rolling abutment with the beam rail support roller 44. Multiple bolt splicing seats 513 are provided on the upper, lower, left and right ends of the beam rail segment 511.

[0040] The first abutment frame 52 includes a wall abutment frame 521, and a plurality of buffer abutment components 522 are spaced on the left side of the wall abutment frame 521. The bottom surface of the wall abutment frame 521 is vertically provided with a support frame 523 for horizontally supporting the tail of the two combined beam rail bodies 51 and a second omnidirectional moving wheel 524. The first abutment frame 52 and the second abutment frame 53 have the same structure.

[0041] Working principle:

[0042] During installation, simply attach the two combined beam rail bodies 51 of the same length as the tunnel width to the two longitudinal sliding slide blocks 4, and attach the first abutment frame 52 and the second abutment frame 53 between the tails of the two combined beam rail bodies 51 to form a rolling abutment with the side wall of the tunnel. Then, hook the wire ropes on the second winch 54 and the third winch 55 to the left and right sides of the lifting arm body 2, and assemble the entire structure inside the tunnel.

[0043] When assembling and splicing the combined beam rail body 51, it is important to ensure that the length extension on both sides of the set on the longitudinal sliding seat group 4 is consistent. This can prevent the lifting arm body 2 from tilting to the left or right due to unilateral load bearing. In addition, the length of the combined beam rail body 51 can be freely assembled and extended, making it easier to adapt to the width of the tunnel to form a transverse rolling support for stable transverse support of the scaffolding. It also makes it easier to assemble the second winch 54 and the third winch 55 to form a lateral rolling drive for the lifting arm body 2. Furthermore, when the lifting arm body 2 moves longitudinally, the second winch 54 and the third winch 55 can also synchronously follow the lifting arm body 2 to perform horizontal alignment and longitudinal displacement.

[0044] When constructing the middle section of the tunnel sidewall, it is only necessary to use two first winches 35 to simultaneously wind up and drive the main body 34 of the suspended platform vertically. When the main body 34 of the suspended platform rises, in order to prevent the main body 34 of the suspended platform from colliding with the curved sidewall of the tunnel, the second winch 54 and the third winch 55 are used to drive the moving base 1 and the lifting arm main body 2 to be stably moved laterally on the longitudinal sliding seat body 41 and the combined beam rail mechanism 5. In addition, when the main body 34 of the suspended platform needs to be switched to the left or right, the rotating device 31 drives the gravity suspended platform frame structure 32 to rotate. During this process, the rotating support base frame 322 will also follow the lifting support seat group 33 to perform a circular rolling rotation, which can realize the switching of the main body 34 of the suspended platform to the left or right for construction of the middle section of the other sidewall of the tunnel.

[0045] When the two first winches 35 synchronously wind up to adjust the height of the suspended basket body 34, the suspended basket body 34 will slide stably on the suspended basket lifting slide column 323. The suspended basket opening 3213 allows the suspended basket body 34 to pass through the suspended basket opening 3213 and be located on the top surface of the lifting and rotating suspended basket mechanism 3.

[0046] When the second winch 54 pulls the lifting arm body 2 to the right, the third winch 55 needs to release the rope first to prevent the third winch 55 from having a reverse pulling force. When the moving base 1 and the lifting arm body 2 move laterally, the beam rail support rollers 44 on the two longitudinal sliding slide blocks 4 will roll and move on the moving abutment surface 512 on the beam rail section 511, so that the lateral movement of the lifting arm body 2 will not have a tilting problem, and can also ensure that the lateral movement of the lifting arm body 2 achieves horizontal positioning.

[0047] During the process of rotating the rotator 31 to change the side of the suspended basket body 34, the support base body 331 will not rotate under the action of each sliding column 335. However, under the action of the turntable 3221, the upper specific gravity suspended basket frame structure 32 can be driven to rotate by the rotator 31, and the support pulley 3224 will roll and adjust along the groove surface of the annular support groove 333, so that the support triangle 3223 is always aligned under the suspended basket body 34 to form effective support. In addition, when the specific gravity suspended basket frame structure 32 rotates, the rotational stress during the rotation process is mainly on the rotating bearing column 324, while the specific gravity block 3212 mainly acts as mentioned above, which will not be repeated here.

[0048] When constructing the tunnel's arched dome, the main body 34 of the suspended platform is first raised to its highest point. Then, by raising the main body 2 of the lifting arm, the entire gravity suspended platform frame structure 32 is vertically pushed up, and the lifting support seat group 33 is also vertically pushed up together. This ensures that the lifting support seat group 33 always provides stable load-bearing support to the rotating support base frame 322 below the location of the main body 34 of the suspended platform. Furthermore, through the winding and unwinding cooperation of the second winch 54 and the third winch 55, the moving base 1 and the main body 2 of the lifting arm are driven to move and adjust horizontally on the longitudinal sliding body 41 and the combined beam and rail mechanism 5, which facilitates the lateral construction adjustment of the tunnel's arched dome. The main body 2 of the lifting arm is a conventional extension arm, which will not be described in detail here.

[0049] In addition, the longitudinal movement of this equipment is achieved by pulling it back and forth using an external tractor. During the longitudinal movement, the first abutment frame 52 and the second abutment frame 53 are rolled against the curved side of the tunnel, and the auxiliary support 45 on the longitudinal sliding block 4 and the first omnidirectional moving wheel 46 provide front and rear support, ensuring that the equipment will not tilt backward or forward during longitudinal movement.

[0050] When no tractor is used, the entire equipment can be longitudinally displaced by multiple manual pushers.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A type of scaffolding for tunnel construction, characterized in that: Its structure includes a movable base, and a lifting arm body is vertically arranged in the middle of the top surface of the movable base. A lifting and rotating basket mechanism is mounted on the upper end of the lifting arm body. Two longitudinal sliding seat groups are symmetrically arranged on the front and rear sides of the lower end of the lifting arm body. A combined beam and rail mechanism is horizontally mounted between the two longitudinal sliding seat groups. The left and right tail parts of the combined beam and rail mechanism are respectively buffered and rolled against the side wall of the tunnel. The lifting and rotating basket mechanism is also equipped with a control box that is electrically connected to the lifting arm body, the lifting and rotating basket mechanism, and the combined beam and rail mechanism. The lifting and rotating basket mechanism includes a rotator, on which a specific gravity basket frame structure is mounted. A lifting support seat assembly is provided in the middle of the bottom surface of the specific gravity basket frame structure. The rotator is fixed to the top surface of the lifting arm body, and the lifting support seat assembly is fixed to the middle arm body of the lifting arm body. The basket body is movably mounted on the right side of the specific gravity basket frame structure. Two first winches for winding, unwinding, and lifting the basket body are suspended on the front and rear sides between the basket body and the specific gravity basket frame structure. The combined beam-rail mechanism includes two combined beam-rail bodies, which are laterally mounted on two longitudinal sliding blocks. The left and right tail sections of the two combined beam-rail bodies are respectively longitudinally connected to a first abutment frame and a second abutment frame for buffering and rolling against the sidewall of the tunnel. The first abutment frame, the second abutment frame and the lifting arm body are connected to a second winch and a third winch for laterally pulling the movable base and moving the lifting arm body left and right.

2. The scaffolding for tunnel construction according to claim 1, characterized in that: The specific gravity suspended platform frame structure includes a specific gravity top frame assembly and a rotating support base frame arranged vertically. Multiple lifting sliding columns for stabilizing the lifting and lowering of the main body of the suspended platform are vertically connected on the right side between the specific gravity top frame assembly and the rotating support base frame. Multiple rotating tension columns are vertically spaced on the right side between the specific gravity top frame assembly and the rotating support base frame.

3. The scaffolding for tunnel construction according to claim 2, characterized in that: The specific gravity top frame assembly includes a horizontal frame, and multiple specific gravity blocks are fitted on the left side of the horizontal frame to make the weight of the lifting and rotating basket mechanism equal on both sides. The middle of the right side of the horizontal frame is provided with a basket opening to prevent the basket body from getting stuck after it rises.

4. The scaffolding for tunnel construction according to claim 3, characterized in that: The rotating support base includes a turntable fixed to the top surface of the lifting support seat assembly, and the top surface of the turntable is fitted with the base body. A support triangle and support pulley are provided on the right side of the bottom surface of the base body, and a first lifting channel is provided through the middle of the base body.

5. The scaffolding for tunnel construction according to claim 4, characterized in that: The lifting support assembly includes a support body, and the top surface of the support body has multiple sliding column through holes aligned in a cross shape. The side surface of the support body has an annular support groove for rotating and rolling with the support pulley. The top surface of the support body has a second lifting channel aligned with the first lifting channel. Each sliding column through hole is fitted with a sliding column for fixing to the main body of the lifting arm, so that the support body can only be lifted vertically.

6. The scaffolding for tunnel construction according to claim 5, characterized in that: Each of the longitudinal sliding block assemblies includes a longitudinal sliding block body, and the left side of the longitudinal sliding block body has a fitting opening, and the front side of the longitudinal sliding block body has a through-hole for the beam rail. The beam rail through-hole is a square opening, and multiple beam rail support rollers are fitted diagonally inside the beam rail through-hole. Multiple auxiliary brackets and a first universal moving wheel are obliquely arranged on the right side of the longitudinal sliding block body, and a traction head is arranged in the middle of the right side of the longitudinal sliding block body.

7. A scaffold for tunnel construction according to claim 6, characterized in that: Both of the aforementioned combined beam rail bodies are composed of multiple beam rail segments that are laterally aligned and spliced ​​together. The length of each beam rail segment is 80-100cm, and the beam rail segment is a square tube. The four opposite corners of the beam rail segment are provided with a travel abutment surface for forming a rolling abutment with the beam rail support roller. Multiple bolt splicing seats are provided on the upper, lower, left, and right ends of the beam rail segment.

8. A scaffold for tunnel construction according to claim 7, characterized in that: The first abutment frame includes a wall abutment frame, and multiple buffer abutment components are spaced apart on the left side of the wall abutment frame. The bottom surface of the wall abutment frame is vertically provided with a support frame for horizontally supporting the tail of the two combined beam rail bodies and a second omnidirectional moving wheel. The first abutment frame and the second abutment frame have the same structure.

9. A construction method for a tunnel construction scaffold as described in claim 8, characterized in that: The construction method is as follows: During installation, simply attach the two combined beam rail bodies of the same length as the tunnel width to the two longitudinal sliding slide blocks, and attach the first and second abutment frames between the tail ends of the two combined beam rail bodies to form a rolling abutment state with the side walls of the tunnel. Then, hook the wire ropes on the second and third winches to the left and right sides of the lifting arm body to complete the assembly of the scaffolding inside the tunnel. When constructing the middle section of the tunnel sidewall, it is only necessary to use two first winches to simultaneously wind up and drive the main body of the suspended platform vertically. When the main body of the suspended platform rises, in order to prevent the main body of the suspended platform from colliding with the curved sidewall of the tunnel, the second and third winches need to be coordinated to drive the moving base and the main body of the lifting arm to be stably moved laterally on the longitudinal sliding seat body and the combined beam rail mechanism. In addition, when the main body of the suspended platform needs to be switched to the left or right, the rotating device drives the specific gravity suspended platform frame structure to rotate. During this process, the rotating support base will also follow the lifting support seat group to perform a circular rolling rotation, which can realize the switching of the main body of the suspended platform to the left or right for construction of the middle section of the other sidewall of the tunnel. When constructing the tunnel's arched dome, the main body of the suspended platform is first raised to its highest point. Then, by raising the main body of the lifting arm, the entire frame structure of the gravity suspended platform is vertically pushed up, and the lifting support assembly is also vertically pushed up together. This ensures that the lifting support assembly always provides stable load-bearing support to the rotating support base frame below the main body of the suspended platform. Furthermore, through the coordinated winding and unwinding of the second and third winches, the moving base and the main body of the lifting arm are driven to make stable lateral movement and adjustment on the longitudinal sliding body and the combined beam and rail mechanism, which facilitates the lateral construction adjustment of the tunnel's arched dome. In addition, the longitudinal movement of this equipment is achieved by pulling it back and forth using an external tractor. During the longitudinal movement, the first and second abutment frames roll against the curved side of the tunnel, and the auxiliary brackets on the longitudinal sliding block and the front and rear supports of the first omnidirectional moving wheel provide support, preventing the equipment from tilting back and forth during longitudinal movement.

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