Analysis Of Excavation Construction And Dynamic Response On The Shuibuya Power Station Tunnel

In recent years, with the development of making use of the underground space by mankind, more and more stability problem of huge underground space excavation are show to us. How to assure the building tunnels safety is a necessary problem that should be resolved in the tunnel construction. Thus it is very necessary to research the tunnel excavation course and its stability.Based on the domestic and foreign research results foundation in the generalized, the hole room peripheral stress concentration degree, the plastic area stress, the plastic area scope, the supports and protections structure displacement and the stress condition which the tunnel excavates creates has been analyzed in this article. The author uses the elastic-plastic theory, dynamic mechanics theory and the numerical analysis method to simulate the Shuibuya power station tunnel excavation course.The main achievements are as follows:(1)Based on the elastic-plastic theory in the course of the tunnel construction in the FLAC program, the whole construction process of the tunnel is analyzed. The displacements of tunnel liner, the change rule of the stress state in the construction course are got. The main reasons of the wall rock destroy in the course of tunnel excavation by step.(2)With the Fast lagrangian Analysis for Continuum method and the rock blast destroy theory and the FLAC^2d twinkle analysis model the tunnel dynamic response in the tunnel construction blast impulsion load is analyzed. The librate velocity, x displacement, radial displacement and primary stress curves are got.