Seismic damping structure of entrance section of railway tunnel in earthquake zone

Abstract

The invention discloses a seismic damping structure of an entrance section of a railway tunnel in an earthquake zone. The structure comprises a front reinforcement zone, a seismic damping zone and a rear reinforcement zone which are arranged on the inner wall of the tunnel and extend from a tunnel entrance to the inside, the front reinforcement zone and the rear reinforcement zone include initialsupport structures, reinforced concrete layers and secondary lining structures from the outside to the inside, the seismic damping zone comprises an initial support structure, a rubber seismic dampinglayer and a secondary lining structure from the outside to the inside, and the front reinforcement zone, the seismic seismic damping zone and the rear reinforcement zone are fixedly connected by a bolt extending from the tunnel entrance to into the inside. Compared with the prior art, the structure has the advantages that a seismic load can be effectively absorbed, thereby achieving the purpose of seismic damping of the railway tunnel, especially the entrance section of the railway tunnel, and possible seismic damages of the railway tunnel structure in the earthquake zone are avoided, therebyensuring operational safety of the railway tunnel in the earthquake zone.

Description

technical field [0001] The invention relates to the technical field of anti-shock and damping of railway tunnels, in particular to an anti-shock and shock-absorbing structure for the opening section of a railway tunnel in an earthquake zone. Background technique [0002] my country's continental earthquakes are about one-third of the global continental earthquakes, making it the country with the most continental earthquakes. Earthquake areas have caused great obstacles to local traffic operations and civil structure upgrades, construction, operation and maintenance; in addition, strong earthquake areas will have a non-negligible impact on civil structures. The earthquake resistance of underground engineering structures is obviously better than that of ground structures. The tunnel structure has good anti-seismic performance and can resist the impact of secondary disasters after the earthquake to a certain extent, so it has become the first choice among various traffic struc...

AI Technical Summary

Problems solved by technology

The first method is mainly to resist the seismic load by increasing the stiffness of the tunnel structure itself, but this method increases the cost to a certain extent and the seismic load borne is also increasing with the increase of the structural stiffness; the second method is between the tunnel structure and A shock absorption system is added between the surrounding rocks to reduce the impact of earthquakes on the tunnel by controlling the deformation of the surrounding rocks

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