Excavation And Support For Stability Analysis Behind The Plant Of Gang Qu River Hydropower Station

Slope is a very common form in the construction project, Slope stability is an important issue of concern to geotechnical engineering. With the development of China's large-scale hydropower projects, highway construction, railroad engineering, mining engineering, there will be a lot of slope engineering, All of these slope of the steady state determine the success or failure of this project.In this paper, the author researches the slope behind the plant of Shangri-La Gang Qu river hydropower station, based on the Analysis of the geology, slope rate and the impact of blasting excavation, a slope of geological model had been obtained, uses the limit equilibrium and finite difference method the stability of the slope had been analyzed, and the corresponding strengthening measures had been proposed. The main research contents and results are:1,Details of the limit equilibrium theory and the finite difference theory were introduced, basic principles of the simplified BISHOP method and JANBU method were elaborated, excavation simulation and anchorage mechanism were explained;2,By way of Engineering geological investigation and laboratory test behind the plant of Shangri-La Gang Qu river hydropower station, the author received the topography, formation characteristics, geological structure, hydrogeology and the physical and mechanical properties of rock of the slope. By studying the failure mechanism of rock deformation and failure modes, describing the geological slope failure Probability Model;3,Select the typical significance of A, B section to study, using the simplified BISHOP method and JANBU method based on limit equilibrium theory to calculate the excavation slope and analyze its stability analysis, Evaluating the existing support measures and raising the corresponding strengthening measures;4,Using the finite difference method software FLAC3D to simulate the slope, by analyzing the deformation, stress and plastic zone distribution and anchor force during construction, to evaluate the overall stability of the slope.