Numerical Analysis Of Deep-Seated Deformation In High-Steep Rock Slopes

Deep-seated deformation is a specific and complicated deformation of high-steep rock slopes, when they are subjected to a gravitationally unstable state for a long period. Although it has been described worldwide starting several tens years ago, its research can still be considered in its youth. The study on deep-seated deformation of rock slopes can play important role in prevention and mitigation of geo-hazards and construction of infrastructures in mountainous areas.The state-of-art of slope deformation and failure is reviewed firstly in thesis, then typical cases of deep-seated slope deformation collected from abroad and home are analyzed deeply, and it is pointed out that deep-seated deformation in anaclinal strata rock slope is toppling deformation in fact. Numerical analysis of continuum model and discontinuum model are performed to simulate the formation and developmental stages of deep-seated deformation of rock slopes, and the conditions under which deep-seated deformation of rock slope occur, the triggering and controlling factors and mechanism of deep-seated deformation also be investigated. The deep-seated slope deformation in left abutment of No:l Jingping Hydropower Station and in Mabukan high slope of Xiangjiaba Hydropower Station are simulated deeply by block deformable distinct element method and large deformation, nonlinear finite element method respectively, based on the systematic study on the engineering geological characters of two slopes.