Application Of Strength Reduction Fem On Slope Stability Analysis Of Ertang Valley Reservoir

Landslide stability issue has been a major water project in question; China is one of more serious landslide country in the world. Along with the gradual implementation of Development of the West Regions strategy, landslides constitute one of the great geological problems that construction project will face. Therefore, to enhance the deformation and stability of the landslide have great significance on ensuring successful implementation of the Development of the West Regions strategy. This broad access to domestic and international rock and soil slope stability calculation based on the literature to study the two Ertang valley reservoir geological environment conditions for the further study of the geological reservoir right bank landslide environmental conditions, deformation and failure characteristics and landslide stability factors based on the reservoir to the right bank of the Ertanggou landslide stability analysis, slope stability analysis of elastic-plastic finite element model, using Drucker-Prager yield criterion, calculated using ANSYS software analysis tools. The main conclusions are as follows:1. To examine Ertang valley reservoir geological environment conditions for the further study of the geological reservoir right bank landslide environmental conditions, deformation and failure characteristics and stability of a landslide based on the analogy through engineering and geological mechanics means the right bank of the reservoir landslide potential failure modes, and a preliminary analysis of the local unstable rock mass.2. Natural landslide only gravity and the stability of landslide rainfall on the stability and reconstruction after the landslide slope cutting only the stability of gravity and torrential rain on the stability of comparing results, analysis of slope displacement resulting, deformation, stress and strain are in line with the general laws of the displacement field shows that top of the hill top, fault f130and fault f22 at the obvious. Stress and strain field in the center and a landslide boundary faults it is obvious. Plastic strain at the boundary of landslide and fault f22 and fault f130 with a central, especially under heavy rain landslide occurred at the faults are obvious plastic strain, is almost through.3. Use of strength reduction finite element method to calculate the landslide safety factor, the results obtained, landslide is stable under gravity conditions, but under heavy rain in a critical state to the unstable stage of development. Landslide slope cutting processed only after transformation is stable under the action of gravity, rain condition landslide safety factor decreased, but also in a stable state. The results show that the rainfall on the two Ertang valley reservoir greater impact on the stability of the right bank.4. In order to improve simulation accuracy of this paper is the strength reduction finite element method, finite difference method and the rigid body limits equilibrium method in landslide stability calculation and application of research analysis and comparison. Get the same conclusion, indicating the application of such methods to complex geological conditions, slope stability of the feasibility and practicality.