Abstract: Lifting and relevant concrete fracture often appear in the process of consolidation grouting of high arch dam, the reasons to lead to dam fracture were analyzed. A three-dimensional finite element simulation method, considering the elastic constraint between dam body and bedrock, was applied to inverse bedrock on the elastic constraint coefficient, and the sensitivity of grouting pressure and concrete coverage thickness were also analyzed. The results show excessive grouting pressure easily leads to the lifting and relevant fracture, while the coverage thickness can reduce the lifting and the corresponding normal stress effectively.

Key words: consolidation grouting  ,   lifting fracture  ,   elastic constraint  ,  coverage depth