Flexible expansion joint device and tunnel lining structure for tunnel lining across faults in strong earthquake area

Abstract

The invention provides a flexible extensible joint device for a cross fault tunnel lining in strong earthquake area and a tunnel lining structure, and relates to the field of transportation infrastructure. The flexible extensible joint device for the cross fault tunnel in high intensity earthquake area is able to maintain the safety and stability of the structure under the condition of static load. A variable structure is become under the fault dislocation and strong ground motion to achieve the transverse, vertical and circumferential deformation in a tunnel, so that a tunnel structure can follow the ground motion displacement on the degree of freedom, and the influence of the forced dislocation displacement and ground motion displacement on a lining structure is reduced. The stiffness ofthe tunnel structure itself is not weakened, and the earthquake damage caused by the mismatch between the lining structure and the stiffness of a flexible joint is reduced, so that the safety is guaranteed. The tunnel lining structure can ensure normal use function under the action of fault forced dislocation or strong ground motion, a damaged flexible extensible device assembly is quickly replaced and quickly restored, and the smooth passage of life is guaranteed.

Description

technical field [0001] The invention relates to the field of traffic infrastructure construction, in particular to a flexible expansion joint device and a tunnel lining structure for cross-fault tunnel lining in a strong earthquake area. Background technique [0002] Tunnel engineering is generally considered to be an engineering building with superior seismic performance, but under strong earthquake conditions, the seismic damage investigation of tunnels shows that the structural damage of tunnel structures across fault sections is obvious. When the tunnel and the underground structure pass through the fault zone, the linear structure of the tunnel will be sheared and destroyed due to the influence of the fault. When an earthquake occurs, the dislocation of the fault at the position of the tunnel structure generally ranges from a few centimeters to tens of meters, and the underground structure passing through the fault fracture zone will directly bear the strong force of th...

AI Technical Summary

Problems solved by technology

Both engineering practice and theoretical analysis show that the flexible design that only reduces the stiffness of the joints does not bring better anti-shock absorption effect, and even causes greater seismic damage and static load unsafety of the joints and connecting sections due to the reduced stiffness

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