Bridge construction anti-falling device and using method thereof

Abstract

The invention discloses a bridge construction anti-falling device and a using method thereof, and relates to the technical field of bridge construction. The bridge construction anti-falling device comprises a supporting device, a lifting device and an anti-falling mechanism, the supporting device comprises a prefabricated concrete block, a supporting steel column, H-shaped steel, first C-shaped steel, second C-shaped steel, a bent supporting plate, a supporting plate, a steel plate and an anti-falling guardrail, the upper surface of the prefabricated concrete block is fixedly connected with a first bolt, and the supporting steel column is arranged at the top of the prefabricated concrete block; the H-shaped steel is arranged at the top end of the supporting steel column, the bottom of the first C-shaped steel is fixedly connected to the upper surface of the H-shaped steel, the top of the second C-shaped steel is fixedly connected to the lower surface of the H-shaped steel, the bent supporting plate is arranged on the lower surface of the second C-shaped steel, and the two ends of the supporting plate are fixedly connected to the bent positions of the lower surface of the bent supporting plate. And third mounting holes are formed in the outer surfaces of the bent supporting plates, so that quick assembly can be realized, and the whole anti-falling device can be conveniently transferred to other construction positions.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a bridge construction anti-fall device and a use method thereof. Background Art

[0002] Bridges generally refer to structures built on rivers, lakes, and seas to allow vehicles and pedestrians to pass smoothly. In order to adapt to the modern high-speed development of the transportation industry, bridges are also extended to buildings that are built across mountain streams, poor geology, or to meet other transportation needs to make passage more convenient. Bridges are generally composed of superstructures, substructures, supports, and auxiliary structures. The superstructure is also called the span structure, which is the main structure for crossing obstacles; the substructure includes abutments, piers, and foundations; the supports are force transmission devices installed at the supporting locations of the span structure and the piers or abutments.

[0003] For bridges built on roads, the existing bridge construction anti-fall devices are inconvenient to install and disassemble, and it is difficult to protect different positions of the bridge according to different construction locations. In addition, during the bridge construction process, debris may fall and hit vehicles passing by on the road under the bridge, posing certain safety hazards. Summary of the invention

[0004] In view of the deficiencies of the existing problems, the present invention provides a bridge construction anti-fall device and a method of using the same to solve the existing problems raised in the above background technology.

[0005] To solve the above problems, the present invention is implemented through the following technical solutions: a bridge construction anti-fall device, comprising a supporting device, a lifting device and an anti-fall mechanism, the supporting device comprising a precast concrete block, a supporting steel column, an H-shaped steel, a first C-shaped steel, a second C-shaped steel, a bent support plate, a support plate, a steel plate and an anti-fall guardrail, the upper surface of the precast concrete block is fixedly connected with a first bolt, the supporting steel column is arranged on the top of the precast concrete block, the H-shaped steel is arranged on the top of the supporting steel column, the bottom of the first C-shaped steel is fixedly connected to the upper surface of the H-shaped steel, the top of the second C-shaped steel is fixedly connected to the lower surface of the H-shaped steel, the bent support plate is arranged on the lower surface of the second C-shaped steel, the two ends of the support plate are fixedly connected to the bending of the lower surface of the bent support plate, the outer surface of the bent support plate is provided with a third mounting hole, the interior of the third mounting hole is provided with threaded steel, the lower surface of the steel plate is fixedly connected to the top of the first C-shaped steel, the anti-fall guardrail The bottom of the fall guardrail is fixedly connected to the edge of the upper surface of the steel plate, and the outer surface of the anti-fall guardrail is provided with an inlet and outlet. The lifting device comprises a winch, a support frame, a wire rope, a guide wheel, a lifting frame and a lifting ring. The wire rope is arranged on the outer surface of the winch, and the outer surface of the guide wheel is fixedly connected to the top of the support frame. The end of the wire rope away from the winch is arranged on the outer surface of the lifting ring, and the bottom of the lifting ring is fixedly connected to the edge of the upper surface of the lifting frame. The outer surface of the lifting frame is provided with a front door, and the side of the lifting frame away from the front door is provided with a rear door. The anti-fall mechanism comprises a fixed bottom plate, a fixed vertical pole, a collecting frame, a buffer spring and a limiting top plate, the lower surface of the fixed bottom plate is arranged on the top of the threaded steel bar, the bottom end of the fixed vertical pole is fixedly connected to the upper surface of the fixed bottom plate, the collecting frame and the buffer spring are both sleeved on the outer surface of the fixed vertical pole, and the lower surface of the limiting top plate is fixedly connected to the top of the fixed vertical pole.

[0006] Preferably, the support device is symmetrically arranged on both sides of the anti-fall mechanism, the lifting device is arranged at the side of the support device, and the anti-fall mechanism is arranged on the top of the threaded steel bar.

[0007] Preferably, a first nut is provided on the outer surface of the first bolt, and the bottom of the supporting steel column is installed on the upper surface of the precast concrete block through the first bolt and the first nut.

[0008] Preferably, a first mounting hole is provided at the bottom of the second C-shaped steel, and a second mounting hole is provided on the upper surface of the bent support plate, and the first mounting hole corresponds to the second mounting hole.

[0009] Preferably, a second bolt is provided inside the first mounting hole and the second mounting hole, a second nut is threadedly connected to the outer surface of the second bolt, and the upper surface of the bent support plate is mounted on the lower surface of the second C-shaped steel through the second bolt and the second nut.

[0010] Preferably, two ends of the threaded steel bar are threadedly connected with a third nut, the threaded steel bar is installed in the bending support plate through the third nut, and the supporting device is symmetrically arranged at both ends of the threaded steel bar.

[0011] Preferably, the bottoms of the hoist and the support frame are fixedly connected to the upper surface of the steel plate, and the hoist and the support frame are symmetrically arranged on both sides of the inlet and outlet.

[0012] Preferably, the end of the buffer spring is fixedly connected to the upper surface of the fixed bottom plate, and the end of the buffer spring away from the fixed bottom plate is fixedly connected to the lower surface of the collection frame.

[0013] Preferably, the method for using the anti-fall device for bridge construction comprises the following steps: each group of supporting devices comprises two precast concrete blocks, two supporting steel columns are installed on each precast concrete block, two H-shaped steels are welded to the top ends of the two corresponding groups of supporting steel columns on the two groups of precast concrete blocks, a number of first C-shaped steels are welded on the top of the H-shaped steels, a number of second C-shaped steels are welded on the bottom of the H-shaped steels, a bent support plate is installed on the bottom of the second C-shaped steels, a steel plate is welded on the top of the first C-shaped steels, an anti-fall guardrail is welded on the upper surface of the steel plate, and an inlet and outlet are reserved, and another group of supporting devices is assembled according to the above steps, the two groups of supporting devices are placed on both sides of the bridge by using a crane, the two groups of lifting devices are respectively installed on the two groups of supporting devices, and the several The two ends of the threaded steel bar are respectively inserted into the third mounting holes of the two sets of supporting devices and fixed with the third nut, and then the anti-fall mechanism is installed on the top of the threaded steel bar. The anti-fall mechanism is directly below the bridge. After the assembly of the entire device is completed, the construction workers can construct on the steel plate with the anti-fall guardrail. The construction workers stand in the lifting frame or put the construction equipment on the lifting frame, start the winch, and use the wire rope to lift the lifting frame to the entrance and exit. The construction workers and construction equipment are sent to the steel plate. The debris dropped during the bridge construction falls into the collection box on the anti-fall mechanism. When disassembling, the anti-fall mechanism and threaded steel bar are removed, and then the two sets of supporting devices are transferred to other construction positions of the bridge by a crane, and then assembled and used according to the above steps.

[0014] The present invention provides a bridge construction anti-fall device, which has the following beneficial effects:

[0015] 1. The anti-fall device for bridge construction includes a supporting device, threaded steel and an anti-fall mechanism. The supporting device can be pre-assembled before construction, and then the supporting device can be hoisted to the construction position of the bridge by a crane, and the threaded steel and the anti-fall mechanism can be installed. When the construction position is changed, only the threaded steel and the anti-fall mechanism need to be disassembled, and then the supporting device can be moved by a crane, which can achieve rapid assembly and facilitate the transfer of the entire anti-fall device to other construction positions.

[0016] 2. The bridge construction anti-fall device uses a supporting device to ensure that the height of the steel plate is consistent with the top of the bridge. The anti-fall guardrail can prevent construction workers working on the steel plate from falling, and can also provide protection for both sides of the bridge.

[0017] 3. The bridge construction anti-fall device uses the anti-fall mechanism. When debris falls during the construction process, the buffer spring uses its own elasticity to weaken the impact, so that the impact force transmitted to the threaded steel is weakened, thereby extending the service life of the threaded steel and facilitating long-term use of the device.

[0018] 4. The anti-fall device for bridge construction uses a lifting device to facilitate the safe going up and down of construction personnel and construction equipment. There is no need for manual going up and down through scaffolding, which prevents construction personnel from falling when climbing up and down, thereby improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the supporting device of the present invention;

[0021] Figure 3 It is a partial structural schematic diagram of the supporting device of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the lifting device of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the anti-fall mechanism of the present invention.

[0024] In the figure: 1. supporting device; 2. lifting device; 3. anti-fall mechanism; 4. precast concrete block; 5. first bolt; 6. supporting steel column; 7. first nut; 8. H-shaped steel; 9. first C-shaped steel; 10. second C-shaped steel; 11. bending support plate; 12. first mounting hole; 13. second bolt; 14. second nut; 15. second mounting hole; 16. supporting plate; 17. third mounting hole; 18. steel plate; 19. anti-fall guardrail; 20. inlet and outlet; 21. threaded steel; 22. third nut; 23. winch; 24. supporting frame; 25. steel wire rope; 26. guide wheel; 27. lifting frame; 28. lifting ring; 29. ​​front door; 30. rear door; 31. fixed bottom plate; 32. fixed vertical pole; 33. collection frame; 34. buffer spring; 35. limit top plate. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0026] Example 1

[0027] like Figure 1-Figure 5 As shown, the present invention provides a technical solution: a bridge construction anti-fall device, including a supporting device 1, a lifting device 2 and an anti-fall mechanism 3, the supporting device 1 includes a precast concrete block 4, a supporting steel column 6, an H-shaped steel 8, a first C-shaped steel 9, a second C-shaped steel 10, a bending support plate 11, a supporting plate 16, a steel plate 18 and an anti-fall guardrail 19. The upper surface of the precast concrete block 4 is fixedly connected with a first bolt 5, the supporting steel column 6 is arranged on the top of the precast concrete block 4, the H-shaped steel 8 is arranged on the top of the supporting steel column 6, and the first C-shaped steel 9 is fixedly connected with the first bolt 5. The bottom is fixedly connected to the upper surface of the H-shaped steel 8, the top of the second C-shaped steel 10 is fixedly connected to the lower surface of the H-shaped steel 8, the bent support plate 11 is arranged on the lower surface of the second C-shaped steel 10, the two ends of the support plate 16 are fixedly connected to the bending of the lower surface of the bent support plate 11, the outer surface of the bent support plate 11 is provided with a third mounting hole 17, the inner part of the third mounting hole 17 is provided with a threaded steel 21, the lower surface of the steel plate 18 is fixedly connected to the top of the first C-shaped steel 9, and the bottom of the anti-fall guardrail 19 is fixedly connected to the steel plate 18 At the side of the surface, the outer surface of the anti-fall guardrail 19 is provided with an inlet and outlet 20, and the lifting device 2 includes a winch 23, a support frame 24, a wire rope 25, a guide wheel 26, a lifting frame 27 and a lifting ring 28. The wire rope 25 is arranged on the outer surface of the winch 23, and the outer surface of the guide wheel 26 is fixedly connected to the top of the support frame 24. The end of the wire rope 25 away from the winch 23 is arranged on the outer surface of the lifting ring 28, and the bottom of the lifting ring 28 is fixedly connected to the side of the upper surface of the lifting frame 27. The outer surface of the lifting frame 27 A front door 29 is provided, and a rear door 30 is provided on the side of the lifting frame 27 away from the front door 29. The anti-fall mechanism 3 includes a fixed bottom plate 31, a fixed vertical pole 32, a collection frame 33, a buffer spring 34 and a limiting top plate 35. The lower surface of the fixed bottom plate 31 is set on the top of the threaded steel bar 21, the bottom end of the fixed vertical pole 32 is fixedly connected to the upper surface of the fixed bottom plate 31, the collection frame 33 and the buffer spring 34 are both sleeved on the outer surface of the fixed vertical pole 32, and the lower surface of the limiting top plate 35 is fixedly connected to the top of the fixed vertical pole 32.

[0028] The supporting device 1 is symmetrically arranged on both sides of the anti-falling mechanism 3 , the lifting device 2 is arranged at the side of the supporting device 1 , and the anti-falling mechanism 3 is arranged on the top of the threaded steel bar 21 .

[0029] A first nut 7 is provided on the outer surface of the first bolt 5 , and the bottom of the supporting steel column 6 is installed on the upper surface of the precast concrete block 4 through the first bolt 5 and the first nut 7 .

[0030] A first mounting hole 12 is disposed at the bottom of the second C-shaped steel 10 , and a second mounting hole 15 is disposed on the upper surface of the bent support plate 11 . The first mounting hole 12 corresponds to the second mounting hole 15 .

[0031] A second bolt 13 is disposed inside the first mounting hole 12 and the second mounting hole 15 , and a second nut 14 is threadedly connected to the outer surface of the second bolt 13 . The upper surface of the bent support plate 11 is mounted on the lower surface of the second C-shaped steel 10 through the second bolt 13 and the second nut 14 .

[0032] The two ends of the threaded steel bar 21 are threadedly connected with third nuts 22 . The threaded steel bar 21 is installed in the bent support plate 11 through the third nuts 22 . The supporting device 1 is symmetrically arranged at the two ends of the threaded steel bar 21 .

[0033] The bottoms of the hoist 23 and the support frame 24 are both fixedly connected to the upper surface of the steel plate 18 , and the hoist 23 and the support frame 24 are symmetrically arranged on both sides of the inlet and outlet 20 .

[0034] The end of the buffer spring 34 is fixedly connected to the upper surface of the fixed bottom plate 31 , and one end of the buffer spring 34 away from the fixed bottom plate 31 is fixedly connected to the lower surface of the collecting frame 33 .

[0035] A method for using a bridge construction anti-fall device, comprising the following steps: each group of support devices 1 includes two precast concrete blocks 4, two support steel columns 6 are installed on each precast concrete block 4, two H-shaped steels 8 are welded to the top of the two corresponding groups of support steel columns 6 on the two groups of precast concrete blocks 4, a plurality of first C-shaped steels 9 are welded to the top of the H-shaped steel 8, a plurality of second C-shaped steels 10 are welded to the bottom of the H-shaped steel 8, a bent support plate 11 is installed at the bottom of the second C-shaped steel 10, a steel plate 18 is welded to the top of the first C-shaped steel 9, an anti-fall guardrail 19 is welded on the upper surface of the steel plate 18, and an inlet and outlet 20 are reserved, and another group of support devices 1 is assembled according to the above steps, the two groups of support devices 1 are placed on both sides of the bridge by a crane, two groups of lifting devices 2 are respectively installed on the two groups of support devices 1, and a plurality of threaded steels 21 are welded to the bottom of the second C-shaped steel 10. The two ends are respectively inserted into the third mounting holes 17 of the two groups of support devices 1 and fixed with the third nuts 22, and then the anti-fall mechanism 3 is installed on the top of the threaded steel bar 21. The anti-fall mechanism 3 is directly below the bridge. After the assembly of the entire device is completed, the construction personnel can construct on the steel plate 18 with the anti-fall guardrail 19. The construction personnel stand in the lifting frame 27 or put the construction equipment on the lifting frame 27, start the winch 23, so that the wire rope 25 lifts the lifting frame 27 to the inlet and outlet 20, and the construction personnel and construction equipment are sent to the steel plate 18. The debris dropped during the bridge construction falls into the collection frame 33 on the anti-fall mechanism 3. When disassembling, the anti-fall mechanism 3 and the threaded steel bar 21 are removed, and then the two groups of support devices 1 are transferred to other construction positions of the bridge by a crane, and then assembled and used according to the above steps.

[0036] When in use, through the supporting device 1, the mounting hole at the bottom of the supporting steel column 6 is passed through the first bolt 5, and then the first nut 7 is screwed on, so that the supporting steel column 6 is installed on the precast concrete block 4, and then the H-shaped steel 8, the first C-shaped steel 9, the second C-shaped steel 10, the steel plate 18 and the anti-fall guardrail 19 are fixed by welding, and then the supporting plate 16 is welded at the bending part of the lower surface of the bent support plate 11, and then the bent support plate 11 is placed on the lower surface of the second C-shaped steel 10, the second mounting hole 15 is aligned with the first mounting hole 12, the second bolt 13 is passed through the first mounting hole 12 and the second mounting hole 15, and the second nut 14 is screwed on, so that the bent support plate 11 is installed at the bottom of the second C-shaped steel 10, thereby completing the assembly of the supporting device 1, the steel plate 18 is consistent in height with the top of the bridge, and the anti-fall guardrail 19 can be used to prevent construction workers working on the steel plate 18 from falling, and it can also play a protective role on both sides of the bridge.

[0037] Through the anti-fall mechanism 3, the anti-fall mechanism 3 is installed just below the bridge. When debris falls during the construction process, the debris falls into the collection frame 33. The collection frame 33 is subjected to the impact force to squeeze the buffer spring 34. The buffer spring 34 uses its own elasticity to weaken the impact, so that the impact force transmitted to the threaded steel 21 is weakened, thereby extending the service life of the threaded steel 21 and facilitating long-term use of the device.

[0038] Through the lifting device 2, the winch 23 is turned on to release the wire rope 25, so that the lifting frame 27 is lowered to the ground, and the construction personnel enter the lifting frame 27 from the front door 29, and the winch 23 is started to reel in the wire rope 25. Under the guidance of the guide wheel 26, the lifting frame 27 moves vertically upward until the rear door 30 is flush with the entrance and exit 20. The rear door 30 is opened, and the construction personnel go up to the steel plate 18 from the entrance and exit 20. Similarly, the construction equipment can also be sent to the steel plate 18 in the above manner, which is convenient for the construction personnel and construction equipment to go up and down safely without manual work on the scaffolding.

[0039] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A bridge construction anti-fall device, comprising a supporting device (1), a lifting device (2) and an anti-fall mechanism (3), characterized in that: The support device (1) comprises a precast concrete block (4), a support steel column (6), an H-shaped steel (8), a first C-shaped steel (9), a second C-shaped steel (10), a bent support plate (11), a support plate (16), a steel plate (18) and an anti-fall guardrail (19). The upper surface of the precast concrete block (4) is fixedly connected with a first bolt (5), the support steel column (6) is arranged on the top of the precast concrete block (4), the H-shaped steel (8) is arranged on the top of the support steel column (6), the bottom of the first C-shaped steel (9) is fixedly connected to the upper surface of the H-shaped steel (8), and the top of the second C-shaped steel (10) is fixedly connected to the H The lower surface of the C-shaped steel (8), the bent support plate (11) is arranged on the lower surface of the second C-shaped steel (10), the two ends of the support plate (16) are fixedly connected to the bending part of the lower surface of the bent support plate (11), the outer surface of the bent support plate (11) is provided with a third mounting hole (17), the interior of the third mounting hole (17) is provided with a threaded steel (21), the lower surface of the steel plate (18) is fixedly connected to the top of the first C-shaped steel (9), the bottom of the anti-fall guardrail (19) is fixedly connected to the side of the upper surface of the steel plate (18), and the outer surface of the anti-fall guardrail (19) is provided with an inlet and outlet (20 ), the lifting device (2) comprises a winch (23), a support frame (24), a wire rope (25), a guide wheel (26), a lifting frame (27) and a lifting ring (28), the wire rope (25) is arranged on the outer surface of the winch (23), the outer surface of the guide wheel (26) is fixedly connected to the top of the support frame (24), the end of the wire rope (25) away from the winch (23) is arranged on the outer surface of the lifting ring (28), the bottom of the lifting ring (28) is fixedly connected to the side of the upper surface of the lifting frame (27), the outer surface of the lifting frame (27) is provided with a front door (29), the lifting A rear door (30) is arranged on the side of the frame (27) away from the front door (29); the anti-fall mechanism (3) comprises a fixed bottom plate (31), a fixed vertical rod (32), a collection frame (33), a buffer spring (34) and a limiting top plate (35); the lower surface of the fixed bottom plate (31) is arranged on the top of the threaded steel (21); the bottom end of the fixed vertical rod (32) is fixedly connected to the upper surface of the fixed bottom plate (31); the collection frame (33) and the buffer spring (34) are both sleeved on the outer surface of the fixed vertical rod (32); and the lower surface of the limiting top plate (35) is fixedly connected to the top of the fixed vertical rod (32).

2. A bridge construction anti-fall device according to claim 1, characterized in that: The support device (1) is symmetrically arranged on both sides of the anti-fall mechanism (3), the lifting device (2) is arranged at the side of the support device (1), and the anti-fall mechanism (3) is arranged on the top of the threaded steel bar (21).

3. The anti-fall device for bridge construction according to claim 1 is characterized by: A first nut (7) is provided on the outer surface of the first bolt (5), and the bottom of the supporting steel column (6) is mounted on the upper surface of the prefabricated concrete block (4) through the first bolt (5) and the first nut (7).

4. The anti-fall device for bridge construction according to claim 1, characterized in that: A first mounting hole (12) is provided at the bottom of the second C-shaped steel (10), and a second mounting hole (15) is provided on the upper surface of the bent support plate (11), wherein the first mounting hole (12) corresponds to the second mounting hole (15).

5. A bridge construction anti-fall device according to claim 4, characterized in that: A second bolt (13) is provided inside the first mounting hole (12) and the second mounting hole (15); a second nut (14) is threadedly connected to the outer surface of the second bolt (13); and the upper surface of the bent support plate (11) is mounted on the lower surface of the second C-shaped steel (10) through the second bolt (13) and the second nut (14).

6. The anti-fall device for bridge construction according to claim 1, characterized in that: The two ends of the threaded steel bar (21) are threadedly connected with a third nut (22), the threaded steel bar (21) is installed in the bent support plate (11) through the third nut (22), and the support device (1) is symmetrically arranged at the two ends of the threaded steel bar (21).

7. The anti-fall device for bridge construction according to claim 1, characterized in that: The bottoms of the hoist (23) and the support frame (24) are fixedly connected to the upper surface of the steel plate (18), and the hoist (23) and the support frame (24) are symmetrically arranged on both sides of the inlet and outlet (20).

8. The anti-fall device for bridge construction according to claim 1, characterized in that: The end of the buffer spring (34) is fixedly connected to the upper surface of the fixed bottom plate (31), and the end of the buffer spring (34) away from the fixed bottom plate (31) is fixedly connected to the lower surface of the collection frame (33).

9. A method for using a bridge construction anti-fall device, characterized in that: The following steps are involved: Each group of supporting devices (1) comprises two precast concrete blocks (4), two supporting steel columns (6) are installed on each precast concrete block (4), two H-shaped steels (8) are welded to the top of the two groups of supporting steel columns (6) corresponding to the two groups of precast concrete blocks (4), a plurality of first C-shaped steels (9) are welded to the top of the H-shaped steel (8), a plurality of second C-shaped steels (10) are welded to the bottom of the H-shaped steel (8), a bent support plate (11) is installed at the bottom of the second C-shaped steel (10), a steel plate (18) is welded to the top of the first C-shaped steel (9), an anti-fall guardrail (19) is welded to the upper surface of the steel plate (18), and an inlet and outlet (20) are reserved. According to the above steps, another group of supporting devices (1) is assembled, the two groups of supporting devices (1) are placed on both sides of the bridge by using a crane, the two groups of lifting devices (2) are respectively installed on the two groups of supporting devices (1), and the two ends of the plurality of threaded steels (21) are respectively inserted into the two groups of supporting devices (1). The anti-fall mechanism (3) is installed in the third mounting hole (17) of the supporting device (1) and fixed with the third nut (22). The anti-fall mechanism (3) is then installed on the top of the threaded steel bar (21). The anti-fall mechanism (3) is located directly below the bridge. After the assembly of the entire device is completed, the construction personnel can work on the steel plate (18) provided with the anti-fall guardrail (19). The construction personnel stand in the lifting frame (27) or place the construction equipment on the lifting frame (27). The winch (23) is started so that the steel wire rope (25) lifts the lifting frame (27) to the inlet and outlet (20). The construction personnel and the construction equipment are sent to the steel plate (18). The debris dropped during the bridge construction process falls into the collection frame (33) on the anti-fall mechanism (3). When disassembling, the anti-fall mechanism (3) and the threaded steel bar (21) are disassembled, and the two sets of supporting devices (1) are transferred to other construction positions of the bridge by a crane. Then, the above steps are followed to assemble and use.

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