Rock stabilization analysis of diversion tunnel of a large-scale hydropower station

The sub-model skill and finite element method were used.Considering the nonlinear characteristic of rock,the global initial stress and the secondary stress of the excavation of the diversion tunnel could be combined.At the same time,construction procedure was considered.Using these methods,the stabilization of the diversion of a large-scale hydropower station was analyzed.According to the result,the designer could make a more rational tunnel structure.