Steel box girder large-span walking bottom-carrying truss construction platform

Abstract

The invention relates to the technical field of bridge construction, and discloses a steel box girder large-span walking bottom-carrying truss construction platform which comprises a truss support. The two truss supports are symmetrically distributed on the two sides of the steel box girder bridge, a truss type platform is movably installed in each truss support, and a pushing mechanism is installed on the front face of the bottom of each truss support. The truss type platform can be safely and efficiently built on the outer side of the steel box girder bridge through stable supporting of the truss support, the truss type platform is composed of square steel with light dead weight and H-shaped steel with high strength, the weight of the whole platform is greatly reduced through splicing of the square steel and the H-shaped steel, and the structural strength and stability of the platform are guaranteed. The platform can bear various loads in the construction process, the mobility of the platform is greatly improved, the truss type operation platform which is formed by splicing the square steel and the H-shaped steel which are light in self weight and can be pushed to walk is adopted, and the problem that a worker needs to operate the platform for construction on the bottom face and the outer side face of a large-width bridge is solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a large-span walkable bottom-supporting truss construction platform for a steel box girder. Background Art

[0002] A total of seven segments of the steel box girder are lifted by a beam-lifting machine for on-site installation. The transverse width of the steel box girder is relatively large, and ceramic pads are required for welding construction of the transverse bottom plate segment splicing welds. In addition, the subsequent on-site repainting and overall painting of the on-site welds on the outer surface of the bridge bottom plate require a bottom construction platform to complete the work manually.

[0003] For existing steel box bridges with smaller widths, the construction platform construction process is relatively simple. Usually, only channel steel and I-beams need to be welded to quickly build a simple platform that meets basic construction needs. However, this simple construction platform welded with a large number of I-beams and channel steels has a large amount of material consumption and heavy weight. Therefore, when facing the construction of wider steel box girders, it seems to be unable to cope with it, and its applicability is greatly reduced.

[0004] To this end, the present invention provides a large-span walkable bottom truss construction platform for a steel box girder. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The present invention provides a large-span walkable bottom-covering truss construction platform for a steel box girder, comprising a truss support; two groups of the truss supports are symmetrically distributed on both sides of the steel box girder bridge, a truss platform is movably installed inside the truss support, the truss platform is used to form a bottom-covering truss construction platform, and a pushing mechanism is installed on the front of the bottom of the truss support, and the pushing mechanism is used to push the truss platform; The truss-type platform comprises square steel and H-shaped steel. Four groups of square steel are movably installed inside the truss bracket. The two adjacent groups of H-shaped steel are distributed at 90 degrees, and H-shaped steel is installed between the four groups of square steel.

[0007] By adopting the above technical solution, the truss bracket can support the truss platform, the truss platform can facilitate the workers to carry out construction on the outside of the steel box girder bridge, and the pushing mechanism can transport the truss platform to the designated position.

[0008] Preferably, the pushing mechanism includes a telescopic rod, a clamping seat and a clamping mechanism, the telescopic rod is installed on the front of the bottom of the truss bracket, the movable end of the telescopic rod is installed with the clamping seat, and the clamping mechanism is installed inside the clamping seat.

[0009] By adopting the above technical solution, the truss platform can be pushed.

[0010] Preferably, a through groove is provided inside the clamping seat, and the clamping mechanism is located inside the through groove.

[0011] By adopting the above technical solution, necessary space can be provided for the movement of the clamping plate to ensure that the clamping plate can move smoothly therein.

[0012] Preferably, the clamping mechanism comprises a second telescopic rod and a clamping plate, the second telescopic rod is installed inside the through slot, and the clamping plate is installed on a side of the through slot away from the second telescopic rod.

[0013] By adopting the above technical solution, the truss platform can be firmly clamped, thereby facilitating its subsequent efficient and safe transportation.

[0014] Preferably, a crank is rotatably mounted on the bottom of the clamping seat, a transmission roller is rotatably mounted inside the truss bracket, a transmission disk is mounted on the bottom end of the transmission roller passing through the truss bracket, and the other end of the crank is rotatably connected to the transmission disk.

[0015] By adopting the above technical solution, the truss platform can be pushed better.

[0016] Preferably, a limit frame is installed at the bottom end of the truss support, and the crank passes through the interior of the limit frame.

[0017] By adopting the above technical solution, a horizontal support effect can be provided for the crank movement, so that the crank can move better. When the crank generates lateral force during the pushing process, the limit frame can effectively absorb and disperse the force to prevent the crank from being offset or damaged.

[0018] Preferably, auxiliary rollers are rotatably mounted on both sides of the inner wall of the truss support close to the transmission disk.

[0019] Preferably, the outer surfaces of the driving roller and the auxiliary roller are provided with protective sleeves, and the protective sleeves are made of wear-resistant rubber material.

[0020] By adopting the above technical solution, the contact area and friction force between the driving roller and the auxiliary roller and the truss platform can be significantly increased, thereby further improving the conveying efficiency and stability of the truss platform.

[0021] Preferably, a transmission gear disc is installed on the outer side of the transmission roller shaft core, and a transmission toothed belt is installed on the outer side of the transmission gear disc.

[0022] By adopting the above technical solution, the truss platform can be efficiently and stably provided with auxiliary transportation.

[0023] Preferably, a support frame is installed on the side of the truss bracket, and a suspension rope is installed on the bottom of the support frame.

[0024] By adopting the above technical solution, the positioning of the truss platform can be achieved. A triangular structure is formed between the support frame and the truss bracket, which can improve the stability between the truss bracket and the suspension rope. The bottom of the support frame is connected to the truss platform through the suspension rope, which can fix the position of the truss platform and improve the connectivity between the truss platform and the truss bracket.

[0025] The beneficial effects of the present invention are: The large-span walkable bottom-protected truss construction platform for steel box girders described in the present invention is used in conjunction with truss brackets, square steels and H-shaped steels. Through the stable support of the truss brackets, the truss-type platform can be safely and efficiently built on the outside of the steel box girder bridge. The truss-type platform is composed of light square steels and high-strength H-shaped steels. The splicing of these two types of steel not only greatly reduces the weight of the entire platform, but also ensures its structural strength and stability, so that the platform can withstand various loads during the construction process, and also greatly improves its mobility. In particular, when facing bridges with a larger width, traditional construction platforms often find it difficult to provide sufficient operating space on both the bottom and the outer side surfaces at the same time. This truss-type platform can easily span the width of the bridge with its unique truss structure and lightweight material. The truss-type pushable and walkable operating platform spliced ​​with light square steels and H-shaped steels solves the problem of personnel operating platforms for construction on the bottom and outer side surfaces of wide bridges.

[0026] The large-span walkable bottom-protected truss construction platform for steel box girders described in the present invention is used in conjunction with a telescopic rod, a clamping seat and a clamping mechanism. When the truss platform is located on the surface of the clamping seat, the bottom of the truss platform is clamped by the clamping mechanism. Through the operation of the telescopic rod, the telescopic rod drives the truss platform to be pushed via the clamping seat and the clamping mechanism, and the truss platform can be pushed to a specified position, thereby allowing the truss platform to be quickly adjusted, thereby facilitating operation by personnel.

[0027] The large-span walkable bottom-covering truss construction platform for steel box girders described in the present invention is used in conjunction with a crank, a transmission disc and a transmission roller. When the transmission roller rotates, the crank will be driven to move. One end of the crank will rotate at the bottom of the clamping seat, and the other end will drive the transmission disc to rotate horizontally. When the crank drives the transmission disc to rotate horizontally, the transmission disc will drive the upper transmission roller to rotate. The rotation of the transmission roller can assist in pushing the truss platform, thereby playing an auxiliary conveying role when conveying the truss platform.

[0028] The large-span walkable bottom-covering truss construction platform of the steel box girder described in the present invention is used in combination with a transmission gear plate, a transmission toothed belt and an auxiliary roller. The transmission roller drives the outer transmission gear plate to rotate, and the transmission gear plate engages with the transmission toothed belt for transmission. The transmission toothed belt drives several other groups of transmission gear plates to rotate, which can drive other auxiliary rollers to rotate. The rotation of the auxiliary rollers can assist in the transportation of the pushed truss platform. By increasing the contact area of ​​the device when transporting the truss platform, the truss platform can be better assisted in transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a side perspective view of an embodiment of the present invention; Figure 2 is a front perspective view of an embodiment of the present invention; Figure 3 It is a side structural schematic diagram of the driving mechanism in the present invention; Figure 4 It is a front structural schematic diagram of the pushing mechanism in the present invention; Figure 5 It is a schematic diagram of the internal structure of the front part of the pushing mechanism in the present invention; Figure 6 It is a structural schematic diagram of the transmission roller in the present invention.

[0030] Description of reference numerals: 1. Truss bracket; 101. Limit frame; 102. Support frame; 103. Lifting rope; 2. Truss platform; 201. Square steel; 202. H-shaped steel; 3. Pushing mechanism; 301. Telescopic rod 1; 302. Clamping seat; 3021. Through groove; 303. Clamping mechanism; 3031. Telescopic rod 2; 3032. Clamping plate; 4. Crank; 401. Transmission disc; 402. Transmission roller; 5. Transmission gear disc; 501. Transmission toothed belt; 502. Auxiliary roller; 503. Protective cover. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples. Example

[0032] The following is a further detailed description of the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments. Figures 1 to 6 , this application provides a large-span steel box girder walkable bottom truss construction platform, please refer to Figure 1 and Figure 2 , including a truss support 1; two groups of truss supports 1 are symmetrically distributed on both sides of the steel box girder bridge, a truss platform 2 is movably installed inside the truss support 1, and the truss platform 2 is used to form a bottom truss construction platform, and a pushing mechanism 3 is installed on the front of the bottom of the truss support 1, and the pushing mechanism 3 is used to push the truss platform 2; The truss platform 2 includes square steels 201 and H-shaped steels 202 . Four groups of square steels 201 are movably installed inside the truss support 1 . The two adjacent groups of H-shaped steels 202 are distributed at 90 degrees. H-shaped steels 202 are installed between the four groups of square steels 201 .

[0033] Specifically, the truss platform 2 can be supported by the truss bracket 1, and the truss platform 2 can facilitate the construction of the outer side of the steel box girder bridge by the workers. Through the stable support of the truss bracket 1, the truss platform 2 can be safely and efficiently built on the outer side of the steel box girder bridge, providing a spacious and stable working space for the construction workers. The truss platform 2 is composed of light square steel 201 and high-strength H-shaped steel 202. The splicing of these two types of steel not only greatly reduces the weight of the entire platform, but also ensures its structural strength and stability, so that the platform can withstand various loads during the construction process. The square steel 201 can reduce the dead weight of the truss platform 2 and provide sufficient standing and operating space for the construction workers. The H-shaped steel 202 has excellent bending and compression resistance. It becomes the main load-bearing component of the truss platform 2. The truss design of the truss platform 2 not only makes the platform itself light and easy to push, but also greatly improves its mobility. Especially when facing a bridge with a larger width, traditional construction platforms often find it difficult to provide sufficient operating space on both the bottom and the outer side. The truss platform 2 can easily cross the width of the bridge with its unique truss structure and lightweight material, providing construction personnel with an all-round, no-dead-angle working platform. The truss platform 2 adopts a truss-type pushable operating platform spliced ​​together with light-weight square steel 201 and H-shaped steel 202, which can solve the problem of the operating platform for personnel who need to perform construction on the bottom and outer sides of a wide bridge, and the pushing mechanism 3 facilitates the transportation of the truss platform 2 to the designated position.

[0034] Please refer to Figure 3 and Figure 4 The pushing mechanism 3 includes a telescopic rod 301, a clamping seat 302 and a clamping mechanism 303. The telescopic rod 301 is installed on the front of the bottom of the truss bracket 1, the clamping seat 302 is installed on the movable end of the telescopic rod 301, and the clamping mechanism 303 is installed inside the clamping seat 302.

[0035] Specifically, in order to push the truss platform 2, when the truss platform 2 is located on the surface of the clamping seat 302, the bottom of the truss platform 2 is clamped by the clamping mechanism 303, and then the telescopic rod 301 works. The telescopic rod 301 drives the truss platform 2 to be pushed through the clamping seat 302 and the clamping mechanism 303. The truss platform 2 can be pushed to reach the specified position for use.

[0036] Please refer to Figure 5 A through groove 3021 is provided inside the clamping seat 302, and the clamping mechanism 303 is located inside the through groove 3021. The through groove 3021 provides necessary space for the movement of the clamping plate 3032 to ensure that the clamping plate 3032 can move smoothly therein without interfering with other parts of the clamping seat 302. In addition, the edge of the through groove 3021 is also smoothed to reduce the friction resistance of the clamping plate 3032 during movement and improve the movement efficiency of the entire clamping mechanism 303.

[0037] Please refer to Figure 5 The clamping mechanism 303 includes a telescopic rod 3031 and a clamping plate 3032. The telescopic rod 3031 is installed inside the through slot 3021. The telescopic rod 3031 is the power source of the clamping mechanism 303. It is responsible for providing the necessary driving force to drive the clamping plate 3032 to move. The telescopic rod 3031 adopts a high-precision and high-reliability electric or pneumatic drive method, which can achieve precise control of the telescopic end. The clamping plate 3032 is installed on the side of the through slot 3021 away from the telescopic rod 3031, and the moving end of the telescopic rod 3031 is connected to the clamping plate 3032.

[0038] Specifically, in order to achieve a firm clamping of the truss platform 2 and facilitate its efficient and safe transportation later, the through groove 3021 can provide space for the movement of the clamping plate 3032. When the truss platform 2 needs to be clamped, the telescopic rod 2 3031 starts to work, and its telescopic end gradually extends to drive the clamping plate 3032 to move. The truss platform 2 can be clamped by the clamping force formed between the clamping seat 302 and the clamping plate 3032, so that the truss platform 2 can be firmly clamped, which is convenient for the transportation of the truss platform 2 in the later stage. When the truss platform 2 needs to be released, it is only necessary to reverse the telescopic rod 2 3031 to make the clamping plate 3032 gradually move away from the other side of the clamping seat 302.

[0039] Please refer to Figure 3 and Figure 6The bottom of the clamping seat 302 is rotatably mounted with a crank 4, and the inside of the truss bracket 1 is rotatably mounted with a transmission roller 402. The surface of the transmission roller 402 adopts an anti-slip design to increase the friction between the truss platform 2 and the truss platform 2 to ensure that there will be no slipping or deviation during the pushing process. The transmission roller 402 passes through the bottom end of the truss bracket 1 and is equipped with a transmission disk 401. The other end of the crank 4 is rotatably connected to the transmission disk 401. The crank 4 is a key connecting component between the pushing mechanism 3 and the transmission system. One end of it is connected to the bottom of the clamping seat 302 of the pushing mechanism 3, and the other end is connected to the transmission disk 401. This design enables the crank 4 to rotate around the bottom of the transmission disk 401 when the pushing mechanism 3 pushes the truss platform 2. The rotation of the crank 4 not only transmits the thrust, but also realizes the conversion from linear motion to rotational motion, thereby providing a power source for the subsequent transmission process.

[0040] Please refer to Figure 3 A limit frame 101 is installed at the bottom end of the truss support 1, and the crank 4 passes through the interior of the limit frame 101.

[0041] Specifically, in order to better push the truss platform 2, when the pushing mechanism 3 pushes the truss platform 2, it will drive the crank 4 to move, one end of the crank 4 will rotate at the bottom of the clamping seat 302, and the other end will drive the transmission disk 401 to rotate horizontally. The transmission disk 401 is an intermediate component connecting the crank 4 and the transmission roller 402. When the crank 4 drives the transmission disk 401 to rotate horizontally, the transmission disk 401 will drive the upper transmission roller 402 to rotate. The rotation of the transmission roller 402 can assist in pushing the truss platform 2, and the limit frame 101 can play a horizontal supporting role for the movement of the crank 4, so that the crank 4 can move better. When the crank 4 generates lateral force during the pushing process, the limit frame 101 can effectively absorb and disperse these forces to prevent the crank 4 from being offset or damaged.

[0042] Please refer to Figure 6 Auxiliary rollers 502 are rotatably mounted on both sides of the inner wall of the truss support 1 close to the driving plate 401.

[0043] Please refer to Figure 4 and Figure 6 The outer surfaces of the driving roller 402 and the auxiliary roller 502 are provided with a protective sleeve 503, and the protective sleeve 503 is made of wear-resistant rubber material. The protective sleeve 503 is made of a rubber material with a high friction coefficient.

[0044] Please refer to Figure 6A transmission sprocket 5 is installed on the outer side of the shaft core of the transmission roller 402, and a transmission belt 501 is installed on the outer side of the transmission sprocket 5. The transmission sprocket 5 adopts a high-strength, wear-resistant synthetic material as the base material of the transmission belt 501, and a precise tooth shape is processed on its surface to ensure that the meshing with the transmission sprocket 5 is tighter and more stable. In addition, the transmission belt 501 also has a certain elasticity, which can absorb and buffer the impact and vibration during the transmission process to a certain extent, further improving the stability and reliability of the entire transmission system.

[0045] Specifically, in order to efficiently and stably assist in conveying the pushed truss platform 2, when the transmission roller 402 starts to rotate, the transmission gear disc 5 tightly installed on its outer side also rotates accordingly. Through the transmission of the transmission toothed belt 501, the other groups of transmission gear discs 5 also rotate accordingly. Auxiliary rollers 502 are also installed above these transmission gear discs 5. The design of multiple groups of auxiliary rollers 502 fully considers the conveying efficiency and stability of the truss platform 2. The surface of the auxiliary rollers 502 is made of anti-slip material to increase the friction between the truss platform 2 and the truss platform 2 to ensure that there is no slipping or deviation during the conveying process. At the same time, the uniform arrangement of multiple groups of auxiliary rollers 502 can ensure uniform and continuous conveying of the truss platform 2. In order to improve the friction between the transmission rollers 402 and the auxiliary rollers 502 and the truss platform 2 Friction, and a protective sleeve 503 is installed on the outside of the transmission roller 402 and the auxiliary roller 502, which can significantly increase the contact area and friction between the truss platform 2, thereby further improving the transportation efficiency and stability of the truss platform 2. At the same time, the protective sleeve 503 also has certain wear resistance and anti-aging properties, and can still maintain good mechanical properties under long-term, high-load operation. The auxiliary roller 502 is driven to rotate by the transmission gear disc 5, which can play an auxiliary transportation role for the pushed truss platform 2. Through the comprehensive design of the coordinated work of the transmission roller 402 and the transmission gear disc 5, the efficient transmission of the transmission toothed belt 501, the rotating transportation effect of the auxiliary roller 502 and the enhanced friction effect of the protective sleeve 503, efficient and stable auxiliary transportation of the pushed truss platform 2 can be achieved.

[0046] Please refer to Figure 1 and Figure 2 A support frame 102 is installed on the side of the truss bracket 1, and a suspension rope 103 is installed at the bottom of the support frame 102. The suspension rope 103 adopts high-strength, corrosion-resistant synthetic fiber material or steel wire rope as the material of the suspension rope 103, ensuring that it can still maintain excellent mechanical properties and durability during long-term use.

[0047] Specifically, in order to achieve the positioning of the truss platform 2, a triangular structure is formed between the support frame 102 and the truss bracket 1, which can improve the stability between the truss bracket 1 and the suspension rope 103. The bottom of the support frame 102 is connected to the truss platform 2 through the suspension rope 103, which can fix the position of the truss platform 2 and improve the connectivity between the truss platform 2 and the truss bracket 1. Through the ingenious connection between the support frame 102 and the truss bracket 1, a stable triangular support system is constructed. This design not only enhances the support strength of the truss bracket 1 on the suspension rope 103, but also significantly improves The anti-overturning ability and lateral stiffness of the entire structure are such that even under extreme weather conditions or dynamic loads during construction, the triangular structure can effectively disperse and resist external forces to ensure the stability and safety of the truss platform 2. The triangular structure formed between the support frame 102 and the truss bracket 1 forms a close synergy with the suspension rope 103. The triangular structure provides a stable support point for the suspension rope 103, so that the suspension rope 103 can maintain a stable tension distribution when bearing the weight of the truss platform 2. At the same time, the precise positioning of the suspension rope 103 further enhances the stability of the triangular structure.

[0048] Working principle: When the truss platform 2 is located on the surface of the clamping seat 302, the telescopic rod 2 3031 works, and its telescopic end gradually extends, driving the clamping plate 3032 to move. The clamping force formed between the clamping seat 302 and the clamping plate 3032 can clamp the truss platform 2, so that the truss platform 2 can be firmly clamped. Then, the telescopic rod 1 301 works, and the telescopic rod 1 301 drives the truss platform 2 to be pushed through the clamping seat 302 and the clamping mechanism 303, so that the truss platform 2 moves inside the truss support 1 to reach the specified position, and the telescopic rod 1 301 pushes the truss platform 2, which drives the crank 4 to move. One end of the crank 4 rotates at the bottom of the clamping seat 302, and the other end drives the transmission plate 401 to rotate horizontally. When the crank 4 drives the transmission plate 401 to rotate horizontally, the transmission plate 401 drives the transmission roller 402 above to rotate. The rotation of the transmission roller 402 can assist in pushing the truss platform 2. When the crank 4 generates lateral force during the pushing process, The limit frame 101 can effectively absorb and disperse these forces to prevent the crank 4 from being offset or damaged. At the same time, the transmission roller 402 drives the outer transmission gear plate 5 to rotate, and the transmission gear plate 5 is meshed with the transmission belt 501 for transmission. The transmission belt 501 drives the other groups of transmission gear plates 5 to rotate, which can drive other auxiliary rollers 502 to rotate. The truss platform 2 that can be pushed by the rotation of the auxiliary rollers 502 plays an auxiliary conveying role. At this time, the protective sleeve 503 can increase the friction between the transmission roller 402 and the auxiliary roller 502 and the truss platform 2, which can better play an auxiliary conveying role for the truss platform 2. Through the stable support of the truss bracket 1, the truss platform 2 can be safely and efficiently built on the outside of the steel box girder bridge. The truss platform 2 adopts a truss-type pushable operating platform spliced ​​with light square steel 201 and H-shaped steel 202, which can solve the problem of personnel operating platform for construction on the bottom and outer side of a wide bridge, and provides a spacious and stable working space for construction personnel.

[0049] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A large-span walkable steel box girder bottom truss construction platform, comprising a truss support (1); characterized in that: Two groups of truss supports (1) are symmetrically distributed on both sides of the steel box girder bridge; a truss platform (2) is movably installed inside the truss support (1); the truss platform (2) is used to form a bottom truss construction platform; a pushing mechanism (3) is installed on the front of the bottom of the truss support (1); the pushing mechanism (3) is used to push the truss platform (2); The truss-type platform (2) comprises square steel (201) and H-shaped steel (202); four groups of square steel (201) are movably installed inside the truss support (1); two adjacent groups of H-shaped steel (202) are distributed at a 90-degree angle; and H-shaped steel (202) is installed between the four groups of square steel (201).

2. The large-span walkable bottom-supporting truss construction platform for steel box beams according to claim 1 is characterized by: The pushing mechanism (3) comprises a telescopic rod (301), a clamping seat (302) and a clamping mechanism (303); the telescopic rod (301) is installed on the front side of the bottom of the truss support (1); the clamping seat (302) is installed on the movable end of the telescopic rod (301); and the clamping mechanism (303) is installed in a movable manner inside the clamping seat (302).

3. The large-span walkable bottom-supporting truss construction platform for steel box beams according to claim 2 is characterized by: A through slot (3021) is provided inside the clamping seat (302), and the clamping mechanism (303) is located inside the through slot (3021).

4. The large-span walkable bottom-supporting truss construction platform for steel box beams according to claim 3 is characterized by: The clamping mechanism (303) comprises a second telescopic rod (3031) and a clamping plate (3032); the second telescopic rod (3031) is installed inside the through slot (3021); and the clamping plate (3032) is installed on a side of the through slot (3021) away from the second telescopic rod (3031).

5. The large-span walkable bottom-supporting truss construction platform for steel box beams according to claim 2 is characterized by: A crank (4) is rotatably mounted on the bottom of the clamping seat (302), a transmission roller (402) is rotatably mounted inside the truss support (1), the transmission roller (402) passes through the bottom end of the truss support (1) and is mounted with a transmission disk (401), and the other end of the crank (4) is rotatably connected to the transmission disk (401).

6. The large-span walkable bottom-supporting truss construction platform for steel box beams according to claim 5 is characterized by: A limit frame (101) is installed at the bottom end of the truss support (1), and the crank (4) passes through the interior of the limit frame (101).

7. The large-span walkable bottom-supporting truss construction platform for steel box beams according to claim 5 is characterized by: Auxiliary rollers (502) are rotatably mounted on both sides of the inner wall of the truss support (1) close to the transmission plate (401).

8. The large-span walkable bottom-supporting truss construction platform for steel box beams according to claim 7 is characterized by: The outer surfaces of the driving roller (402) and the auxiliary roller (502) are provided with protective sleeves (503), and the protective sleeves (503) are made of wear-resistant rubber material.

9. The large-span walkable bottom-supporting truss construction platform for steel box beams according to claim 5 is characterized by: A transmission toothed disc (5) is installed on the outer side of the shaft core of the transmission roller (402), and a transmission toothed belt (501) is installed on the outer side of the transmission toothed disc (5).

10. The large-span walkable bottom-supporting truss construction platform for steel box beams according to claim 1 is characterized by: A support frame (102) is installed on the side of the truss support (1), and a suspension rope (103) is installed on the bottom of the support frame (102).

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