Static And Dynamic Stability Analysis Of Xi Luodu High Arch Dam Abutment

The stability of arch dam foundation and abutment is always of great concern to designer and geological experts. The site formation of Xi Luodu high arch dam are a serial of layered and inner dislocation bands and four groups joint fissures, such as C₁ C₂ C₃ C₅ C₇ C₈ C₉ C₁₀ C₁₁ C₁₂ and P₂ β_n L_c etc,which the physical mechanic parameters are small and the deformability is weak.So they are the most noticeable to the whole rock mass stability of the dam abutment. In this thesis, the static and dynamic stability of dam abutment are studied using 3D non-linear finite element method and 3D RBSM(Rigid Body-spring model), based on delicate and careful simulation of layered and inner dislocation bands of the dam area: studied the deformation and over-load failure mechanism quantitively;confirmed the over-load and synthetic safety coefficient and the failure conformation and mechanism; calculated the dynamic safety coefficient of the gliding-body and analysed the whole stability of the abutment under the earthquake conditions; evaluated the security of the project. The main research contents are as follows:1. According to the geological conditiongs of Xi Luodu project,layered and inner dislocation bands and joint fissures are fully simulated to establish 3D numerical modal of the arch dam, foundation and abutment.2. Using 3D non-linear finite element method, studied the deformation and over-load failure mechanism of layered and inner dislocation bands and the failure area and mechanism of rock mass,and confirmed the degree of spot safety and the over-load coefficient and the synthetic coefficient,and evaluated the stability of dam abutment under the static load conditions.3. Using 3D RBSM and combined with three seismic waves in the location of...