Point-supporting self-recovering flexible buffering structure adopting piston rods for hangar tunnel project

Abstract

The invention provides a point-supporting self-recovering flexible buffering structure adopting piston rods for a hangar tunnel project. The structure comprises an intercepting screen used for intercepting falling stones, supporting ropes used for supporting the intercepting screen, the piston rods, spiral springs connected to the supporting ropes and the piston rods and connecting pieces tying the intercepting screen to the supporting ropes. Compared with existing buffering cushion layers of gravels, rubber tyres and the like, the flexible buffering structure is wider in application range andmore flexible in structure arrangement and can be used by respectively combining rebar concrete hangar tunnels of different types with steel-structure hanger tunnels of different types. The flexiblebuffering structure has self-recovering performance, after impacting of the falling stones, the falling stones can be thrown outward, and accumulating of the falling stones is avoided; self-cleaning for the falling stones is achieved, and later maintenance cost is reduced. The flexible buffering structure is spliced by several prefabricated steel structure members on site, is light in weight and convenient to install and dismantle, can greatly reduce the born weight of hangar tunnels, sizes of members of the hangar tunnels and the embedded depth of the foundation, and is better in economical efficiency.

Description

technical field [0001] The invention relates to the technical field of slope protection, in particular to a piston rod point-supported self-restoring flexible buffer structure used in shed tunnel engineering. Background technique [0002] About 2 / 3 of my country's land area is mountainous, and disasters such as falling rocks and landslides have occurred frequently since ancient times. Effective protection of them is related to the safety of people's livelihood and the effective operation of important infrastructure. Sheds are often used for rockfall protection on mountain roads, railways, and tunnel entrances to ensure driving safety. At present, common shed holes mainly include reinforced concrete shed holes and steel structure shed holes. Cushioning, etc. Although the cushioning and protection performance of shed tunnels using the above-mentioned cushion layer has been improved, accidents such as rockfall accumulation, rockfall invasion, and rockfall impact damage to she...

AI Technical Summary

Problems solved by technology

Although the cushioning and protection performance of shed tunnels using the above-mentioned cushion layer has been improved, accidents such as rockfall accumulation, rockfall invasion, and rockfall impact damage to shed tunnels still occur frequently. Take the sand cushion layer often used in reinforced concrete shed tunnels as an example , due to the inelastic deformation of the sand, rockfalls will form accumulations on the top of the shed after the impact, making cleaning and maintenance difficult; at the same time, due to the insufficient buffering deformation capacity of the sand buffer layer, the shed may still be collapsed by the impact

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