| Fuxi Tunnel,in Huangshan city,Anhui province,is situated teconicly in Jiangnan Uplift of lower Yangtze region.Today's tectonic shape of the area around the tunnel is very complicated because of superposing influence by several-stage tectonic movements since Mesozoic;and among these movements,the Indosinian tectonic movement is decisive. Universal EW- and NE-trending faults took place during Indosinian epoch.It 's advised to let the strike of the tunnel be perpendicular to the strikes of these faults so as to lessen their negative influence .The latest tectonic movement is compressive,it decides today's tectonic stress field. Studying shows that we must design different-shape tunnels according to the spatial difference of today's tectonic stress field.In order to analyse systematically the process of stability and destroying of foundation under different load,a new theory is provide in this article.That is stability-destroying state function(variable).This function is used to analyse the process of stability and destroying of stripe foundation under different load,and Dangerous Bearing Capacity(DBC) of stripe foundation is defined according to the analysing.The DBC of foundation of axis wall of Fuxi Tunnel is caculated. Furthermore,there are a lot of joints around the tunnel adits,and they influence the stability of Fuxi Tunnel a lot.It's discussed too. |
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