Large deformation analysis and engineering treatment of Taoshuya tunnel supporting structure

Taoshuya tunnel is located in the Fengjie-Wushan section of Yu-Yi Freeway,the geology condition is very bad.Large deformation and serious damage happened on the tunnel under construction.The primary deformation of rock has the characteristics of large deformation rate,long duration time and serious damage on tunnel.And the main expression forms are arch settlement,wall crushing,shotcrete flaking,S-shape twisted steel support,broken lining,etc.By analyzing surrounding rocks,groundwater,earth stre...