It is indicated that the dynamic amplification of abutment rock body and dam-water-foundation interaction should be considered in the aseismatic stability analysis for high arch dam abutment.

For the resistance and mountain body of Shuanghe arch dam is thin and weak, safety factor of abutment stability is low.

Anciently, study on dam body stress, abutment stability and up-glide stability is rather abundant by the dam engineers, but quite few on structural stability of dam body.