The Xiajiang hydro-junction project is featured with bad rock integrity and weak anti-scouring ability,so protective engineering measures shall be taken.Analyzing the No.11 sluice-pier,we know that the anti-sliding stability of No.11 sluice-pier cannot meet the requirements of relevant specification.Adopting the nonlinear numerical method,we check the safety factor of deep-layer anti-sliding stability of No.11 sluice-pier and conduct the nonlinear finite element analysis of it by SAPTIS.According to the analysis results,we propose two schemes,i.e.,thickening the bottom slab and arranging systematic anchor piles,both of which can meet the requirements of anti-sliding stability.