Seismic Performance Research For The Inverted Arch Of Highway Tunnel And Its Form Optimization

The rapid development of tunnel makes people’s understanding of inverted arch is more and more profound. However, When the seismic performance analysis of the tunnel often ignore the characteristics of the inverted arch tunnel in seismic effects. How the structure form of the inverted arch tunnel structure matching in order to improve the overall mechanical properties is crucial to the tunnel.Based on station east road tunnel project, this paper uses the finite element numerical analysis software Midas-GTS modeling analysis of inverted arch in earthquake environment performance, the main contents are as follows :① Comparative analysis of inverted arch and inverted arch tunnel under earthquake load dynamic response characteristics of secondary lining and anchor, the inverted arch under seismic load their role in the overall stability of the tunnel.②To station east road tunnel project as the background, using the finite element modeling method, study different cases of inverted arch and depth of inverted arch tunnel structure seismic performance, analysis the influence of buried depth on seismic performance of inverted arch tunnel, provide a reference for similar tunnel buried depth.③Comparative analysis of inverted arch tunnel seismic performance with the law of the variation in thickness of secondary lining, designed to provide the reference for the similar tunnel second lining thickness.④Establish different inverted arch finite element model of rock and soil- tunnel radius of curvature, research under earthquake load optimum radius of curvature of inverted arch tunnel.