| The slope stability analysis always is one of the important research content in geotechnical engineering field. In recent years, the slope failure problem has been received great attention from geotechnical workers. Along with the implementation of the western development strategy in our country, a large number of infrastructure project will constantly emerging, such as water conservancy project, railway project, highway project and city urban construction project etc. These projects exists many slope engineering. So the slope stability studying has the extremely vital significance to the entire national economy development.According to relevant statistics, most of the instability problems of slope is relevant with rainfall in our country, especially after the rainstorm often happen a lot of landslide slope instability problems such as collapse, landslip etc. This thesis mainly research the high steep slope stability under the condition of rainfall infiltration. According to the engineering geological conditions and physical and mechanical parameters of side slope build up the numerical analysis model. Using ABAQUS software to simulate the slope stability under two rainfall conditions. And then analysis of slope pore pressure field, stress field and displacement field and change rules of plastic zone, combining engineering experience making a comprehensive evaluation on the slope stability.The main research contents of the thesis as follows:(1) Introducing the main factors of influencing slope stability and landslide mechanism, and the finite element method is proposed to solve the slope stability problems.(2) Introducing unsaturated seepage theory, the slope rainfall model and rock materials of elastic-plastic constitutive model. Expounds the theory of coupled pore fluid flow and stress and their basic equations. Introducing the methods and steps of simulating coupled pore fluid flow and stress problem by ABAQUS.(3)Studing the slope pore pressure field, saturation distributions, stress field and displacement field distribution and the plastic zone respectively in two rainfall intensity conditions by ABAQUS. |
