Cross-active fault zone tunnel lining prefabricated flexible joint structure and tunnel initial lining structure

Abstract

The invention provides a cross-active fault zone tunnel lining prefabricated flexible joint structure and a tunnel initial lining structure and relates to the field of transportation infrastructure construction in high-intensity seismic zones. The structure includes a tunnel initial support, a waterproof plate, a second lining section and a flexible joint. The second lining section includes a first section second lining and a second section second lining. The flexible joint is used for being connected with the first section second lining and the second section second lining and used for bearing difference displacement, dislocation displacement and strong seismic energy damage between a stratum and the structure under strong vibration. Under the dislocation and strong vibration, the connection ends of the second lining and the flexible joint can be longitudinally freely telescopic and annularly deform. The structure actively guides the difference displacement, the dislocation displacement and strong seismic energy between the stratum and the structure to the flexible joint between tunnel sections, and the anti-shocking goal of the cross-fault and large active fault zone tunnel structure is achieved at the expense of the joint. The safety security is provided for the safety of staff, machine and device safety and rescue after an earthquake, and the joint can be repaired in time.

Description

technical field [0001] The invention relates to the field of traffic infrastructure construction, in particular to a prefabricated flexible joint structure for tunnel lining across an active fault zone and a tunnel initial laying structure. Background technique [0002] In recent years, as my country's transportation infrastructure has entered a stage of comprehensive development, more and more traffic tunnels have crossed fault areas or large-scale active fault zones, such as Shigangba Water Diversion Tunnel, Baocheng Line Dishuizi Tunnel, Duwen Highway Jiujiaya Tunnel , Duwen Expressway Longdongzi Tunnel, Zipingpu Tunnel, Longchi Tunnel, etc. are all located in high-intensity earthquake areas and cross fault fracture zones. Due to the obvious sudden change in the stiffness of the surrounding rock in the tunnel crossing the fault zone, under the action of strong earthquakes and fault dislocations, the tunnel lining will appear oblique, circumferential, and longitudinal crack...

AI Technical Summary

Problems solved by technology

At present, there have been some achievements in the research on seismic damage and shock-absorbing structures of cross-fault tunnels at home and abroad, but the research on the specific methods of setting shock-absorbing structures for tunnels crossing faults and large-scale active fault zones is still immature and the number is small

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