Anti-falling structure of tunnel trestle

Abstract

The utility model discloses an anti-falling structure of a tunnel trestle, which belongs to the technical field of trestles, is arranged between a steel panel I and a steel panel II of the tunnel trestle, and comprises a net structure formed by connecting a plurality of iron chains together, and the plurality of iron chains are in a loose state. One side of the net-shaped structure is connected with the steel panel I, and the other side is connected with a steel pipe. The first steel panel is provided with a first fixing assembly used for being detachably connected with a steel pipe, and the second steel panel is provided with a second fixing assembly used for being detachably connected with the steel pipe. When the steel pipe is connected with the first fixing assembly, the net-shaped structure is in a folded state, and when the steel pipe is connected with the second fixing assembly, the net-shaped structure is in an unfolded state. The tunnel trestle anti-falling net solves the problems that an existing tunnel trestle anti-falling net is poor in buffering and energy dissipation effect, prone to being smashed and not easy to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of trestles, in particular to an anti-falling structure of a tunnel trestle. Background Art

[0002] A tunnel trestle is a temporary bridge structure that provides support and protection for tunnel construction. It is usually used to cross trenches, rivers or other obstacles inside the tunnel during tunnel construction so that construction personnel, equipment and materials can pass smoothly. A common tunnel trestle includes two steel panels arranged at intervals, and an anti-fall net is arranged between the two steel panels to prevent people or objects from falling from the trestle. In the prior art, the anti-fall net generally uses high-strength metal materials, such as steel wire ropes, steel wire meshes or steel meshes, to ensure that it has sufficient strength and durability. However, due to the use of high-strength metal materials, the buffering and energy dissipation effect of the anti-fall net is poor, and it is often damaged by falling flying stones during blasting construction. In addition, the anti-fall net needs to be removed when the tunnel trestle is moved, and the anti-fall net is reinstalled after the tunnel trestle is reinstalled. However, in the prior art, the anti-fall net is generally installed on the steel panel of the tunnel trestle by welding, bolting or other reliable methods, so there is a defect of inconvenient disassembly and assembly. Prior art CN 218596886 U proposes a portable anti-falling device for a tunnel inverted arch trestle, in which the anti-falling mesh can be flipped and folded 180 degrees and move with the mobile trestle as a whole. However, in the device, one side of the anti-falling mesh is hinged to the trestle, and the other side is not connected to the supporting structure, so the overall mechanical strength is poor and cannot withstand large pressure. During blasting construction, it is also easy to be damaged by flying rocks. Utility Model Content

[0003] The utility model provides an anti-falling structure for a tunnel trestle to solve the problems that the anti-falling net of the existing tunnel trestle has poor buffering and energy dissipation effect, is easily damaged and is difficult to disassemble and assemble.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0005] A falling prevention structure for a tunnel trestle is arranged between a first steel panel and a second steel panel of the tunnel trestle, the falling prevention structure comprising a mesh structure formed by connecting a plurality of iron chains together, the plurality of iron chains are all in a relaxed state; one side of the mesh structure is connected to the first steel panel, and the other side is connected to a steel pipe; the first steel panel is provided with a first fixing component for detachably connecting the steel pipe, and the second steel panel is provided with a second fixing component for detachably connecting the steel pipe, when the steel pipe is connected to the first fixing component, the mesh structure is in a retracted state, and when the steel pipe is connected to the second fixing component, the mesh structure is in an expanded state.

[0006] Furthermore, the first fixing assembly includes two first slots which are spaced apart and open upward, and the first slots are welded to the steel panel.

[0007] Furthermore, the second fixing assembly includes a plurality of second slots which are spaced apart and open upward, and the second slots are welded to the second steel panel.

[0008] Furthermore, the first card slot and the second card slot are both U-shaped.

[0009] Furthermore, the first fixing assembly and the second fixing assembly are respectively located on one side of the first steel panel and the second steel panel close to each other.

[0010] Furthermore, the mesh structure is provided with a connecting ring, and is connected to the steel pipe through the connecting ring.

[0011] Furthermore, the mesh structure is connected to the steel panel by bolts.

[0012] Furthermore, the meshes of the mesh structure are rectangular, and the mesh size is less than 10×10 cm.

[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0014] 1. The mesh structure of the utility model is composed of a number of iron chains connected together, and when in use, the two opposite sides of the mesh structure are respectively connected to the steel panel 1 and the steel panel 2, and has good mechanical properties and load-bearing capacity. The iron chains of the mesh structure are all in a relaxed state, which has a good buffering and energy-absorbing effect, can withstand a large impact, and is not easily damaged by flying stones. Compared with the prior art anti-falling nets made of hard materials, the utility model has a longer service life.

[0015] 2. The mesh structure of the utility model is connected with steel pipes, and structures for fixing the steel pipes are provided on steel panel 1 and steel panel 2. When the steel pipes are fixed to the first fixing assembly on steel panel 1, the mesh structure is in a folded state, that is, the mesh structure is separated from steel panel 2, and the trestle can be moved at this time; when the steel pipes are fixed to the second fixing assembly on steel panel 2, the mesh structure is in an expanded state, and at this time, the mesh structure works normally and plays an anti-falling function. The first fixing assembly and the second fixing assembly adopt a groove structure to cooperate with the steel pipe, so that the anti-falling structure as a whole has the advantage of easy disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the anti-falling structure proposed in the embodiment of the utility model when it is unfolded;

[0017] Figure 2 A schematic diagram of the structure of the anti-falling structure proposed in the embodiment of the utility model when it is folded;

[0018] Among them, the markings in the attached drawings are: 1-steel panel 1, 2-steel panel 2, 3-net structure, 4-steel pipe, 5-first slot, 6-second slot. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] like Figure 1-2 As shown, a fall prevention structure of a tunnel trestle is arranged between a steel panel 1 and a steel panel 2 of the tunnel trestle. The fall prevention structure includes a mesh structure 3 formed by connecting a plurality of iron chains, and the plurality of iron chains are in a relaxed state to prevent the chains from being stretched too tight and easily damaged. If necessary, the chains can also be covered with a buffer sleeve to improve the buffering effect and strengthen the protection of the chains. The mesh of the mesh structure 3 is rectangular, and the mesh size is less than 10×10 cm.

[0022] One side of the mesh structure 3 is connected to the steel panel 1, and the other side is connected to the steel pipe 4. As a preferred embodiment, the mesh structure 3 is provided with a connecting ring, and is connected to the steel pipe 4 through the connecting ring, so that the steel pipe 4 and the mesh structure 3 are conveniently connected together.

[0023] Steel panel 1 is provided with a first fixing component for detachably connecting the steel pipe 4, and steel panel 2 is provided with a second fixing component for detachably connecting the steel pipe 4. When the steel pipe 4 is connected to the first fixing component, the mesh structure 3 is in a retracted state, and when the steel pipe 4 is connected to the second fixing component, the mesh structure 3 is in an expanded state.

[0024] The first fixing assembly and the second fixing assembly are respectively located on one side of the steel panel 1 and the steel panel 2 which are close to each other.

[0025] The first fixing assembly includes two first slots 5 which are spaced apart and open upwards, and the first slots 5 are welded to the steel panel 1.

[0026] The second fixing assembly includes a plurality of second slots 6 which are spaced apart and open upwards, and the second slots 6 are welded to the second steel panel 2 .

[0027] The first clamping slot 5 and the second clamping slot 6 are both U-shaped, which facilitates the disassembly and assembly of the steel pipe 4 .

[0028] In addition, the mesh structure 3 is connected to the steel panel 1 by bolts, so that the mesh structure 3 and the steel panel 1 have good stability. When the entire mesh structure 3 needs to be dismantled, the mesh structure 3 and the steel panel 1 can be separated by removing all the corresponding bolts.

[0029] The mesh structure 3 of the utility model is composed of a plurality of iron chains connected together, and when in use, the opposite sides of the mesh structure 3 are respectively connected to the steel panel 1 and the steel panel 2 2, and has good mechanical properties and load-bearing capacity. The iron chains of the mesh structure 3 are all in a relaxed state, and have a good buffering and energy-absorbing effect, can withstand a large impact, and are not easily damaged by flying stones. Compared with the prior art anti-falling net made of hard materials, the utility model has a longer service life.

[0030] The mesh structure 3 of the utility model is connected with a steel pipe 4, and a structure for fixing the steel pipe 4 is provided on both the steel panel 1 and the steel panel 2. When the steel pipe 4 is fixed to the first fixing assembly on the steel panel 1, the mesh structure 3 is in a folded state, that is, the mesh structure 3 is separated from the steel panel 2, and the trestle can be moved at this time; when the steel pipe 4 is fixed to the second fixing assembly on the steel panel 2, the mesh structure 3 is in an unfolded state, and at this time, the mesh structure 3 works normally and plays an anti-falling function. The first fixing assembly and the second fixing assembly use a groove structure to cooperate with the steel pipe 4, so that the anti-falling structure as a whole has the advantage of easy disassembly and assembly.

[0031] The above description is a detailed description of the preferred feasible embodiment of the utility model, but the embodiment is not used to limit the scope of the patent application of the utility model. All equivalent changes or modified changes completed under the technical spirit suggested by the utility model should fall within the patent scope covered by the utility model.

Claims

1. A tunnel trestle anti-falling structure, arranged between a first steel panel and a second steel panel of the tunnel trestle, characterized in that: The anti-fall structure includes a mesh structure composed of a number of iron chains connected together, and the several iron chains are in a relaxed state; one side of the mesh structure is connected to a steel panel, and the other side is connected to a steel pipe; the steel panel one is provided with a first fixing component for detachably connecting the steel pipe, and the steel panel two is provided with a second fixing component for detachably connecting the steel pipe. When the steel pipe is connected to the first fixing component, the mesh structure is in a retracted state, and when the steel pipe is connected to the second fixing component, the mesh structure is in an expanded state.

2. The anti-falling structure of a tunnel trestle according to claim 1, characterized in that: The first fixing assembly comprises two first slots which are spaced apart and open upwards, and the first slots are welded to the steel panel.

3. The anti-falling structure of a tunnel trestle according to claim 2, characterized in that: The second fixing assembly includes a plurality of second slots which are spaced apart and open upward, and the second slots are welded to the second steel panel.

4. The anti-falling structure of a tunnel trestle according to claim 3, characterized in that: The first card slot and the second card slot are both U-shaped.

5. The anti-falling structure of a tunnel trestle according to claim 1, characterized in that: The first fixing assembly and the second fixing assembly are respectively located on one side of the first steel panel and the second steel panel which are close to each other.

6. The anti-falling structure of a tunnel trestle according to claim 1, characterized in that: The mesh structure is provided with a connecting ring and is connected to the steel pipe through the connecting ring.

7. The anti-falling structure of a tunnel trestle according to claim 1, characterized in that: The mesh structure is connected to the steel panel by bolts.

8. The anti-falling structure of a tunnel trestle according to claim 1, characterized in that: The meshes of the mesh structure are rectangular, and the mesh size is less than 10×10 cm.

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