Application of geo-mechanics in the discharge tunnel project of hydropower station

The geological condition under the elevation of 1981m on the inlet slope of the discharge tunnel at the left bank of Gongboxia hydropower Station is complex with interlaced faultages. The treatment of the tunnels face slope and the anchor of collapse on the left slope have own peculiarities, at the same time the formation of tunnel inlet and the excavation and anchor of transition section are typical. Especially the analysis of geological structure and its stability have particular features, which ensure not only the slope stability and the safety of tunnel formation, but also the construction schedule. The analysis of rock structure and geological structure provide reference for similar projects.