The Seismic Design Calculation Method And Test Study Of Tunnel Shallow-Buried Portal And Rupture Stick-Slipping Section

China is a country with frequent earthquake disasters. At the moment, our country is in the period of the fast development of transport construction. The ongoing or new tunnel construction is almost in seismically active western China. And the tunnel of passing through active faults is increasing. The tunnel is a big part of traffic lifeline project. And the tunnel should be kept smooth or can be timely resume the traffic in strong earthquake condition. This has important significance to the earthquake relief and reconstruction work. The thesis regarded tunnel seismic damage of Wenchuan earthquake as to research background, and combined with the current situation of the current tunnel seismic design code and the tunnel seismic design in China. The thesis started to the research of the seismic design calculation method of tunnel shallow-buried portal and ruptures stick-slipping section, and also carried out the static rupture model test of rupture stick-slipping tunnel. The main contribution includes:First, the ratio and height of slope, soil thickness and seismic intensity have a profound influence on the propagation law of ground motion peak acceleration of shallow-buried portal section. So, these factors were analyzed and summarized by using finite difference software FLAC3D. The determination method of ground motion peak acceleration of shallow-buried portal section was established, and the determination method was verified by shaking table dynamic model test.Then, the seismic design calculation method of mountain tunnel shallow-buried portal and rupture stick-slipping section were established by analyzing structural characteristics and using basic theory of response displacement. And the seismic design calculation method of mountain tunnel shallow-buried portal and rupture stick-slipping section were verified by dynamic time history analysis.Finally, according to the earthquake disaster character of rupture stick-slipping tunnel, six shock absorption measures were static rupture model test. The experimental result is show that the shock absorption joint of secondary lining (spacing is12m) had the best damping effect, considered of convenience and economy of tunnel construction.Some problems existing in the mountain tunnel seismic design in our current country were studied by highway tunnel earthquake damage survey of Wenchuan earthquake, data research, theory and numerical analysis, shaking table dynamic model test and static rupture model test in papers. The results can be referred to for the development of mountain tunnel seismic and vibration absorb technology in our country.