Stability Analysis Of Slope Strengthened By Retaining Wall Under Rainfall Infiltration

Based on the ABAQUS finite element software and the limit equilibrium theory,the thesis introduces the intensity reduction and rainfall infiltration model to study the relationship between the displacement of retaining wall and the active earth pressure,the relationship between the displacement and the safety factor,and then analyzes the stability of the retaining wall slope under different rainfall conditions.Most of the current slope slope monitoring based on slope displacement,retaining wall back soil pressure is not necessarily in the limit state.Therefore,the relationship between the displacement of the retaining wall and the active earth pressure and the safety factor after the wall is studied,and the stability of the slope strengthened by the retaining wall under different rainfall conditions is analyzed,and the relation between the slope displacement and the safety factor is established.It will have important reference value for practical engineering.The main tasksin this thesis as follows:1.The current classical soil pressure calculation theory can only calculate the soil pressure under the limit equilibrium condition of the wall of the wall.The study in this thesis shows that the earth pressure on the back of the wall is not necessarily in the limit equilibrium state.This thesis will study the calculation theory of earth pressure on the back of the wall,mainly considering the soil pressure calculation method of Coulomb earth pressure and Rankine earth pressure theory,and compare the above method with the result of finite element analysis.On this basis,the applicability of the above method is studied.2.Based on the static equilibrium condition and the Mohr-Coulomb failure criterion of soil,the quantitative analysis method of slope stability is studied.On this basis,the relationship between the displacement of retaining wall and the c??,and the calculation method of the non limit active earth pressure are discussed on this basis.3.The basic principle of slope stability analysis based on the finite element strength reduction method is studied.Combining the strength reduction technique with the finite element method,the rainfall infiltration numerical model of the retaining wall strengthening slope is established,and the change law of the slope displacement and the earth pressure and safety factor of the wall is discussed.Changes in pressure and safety factor.Through the finite element numerical calculation,Studied the change process of stress field and strain field of slope soil in rainfall process.Studied the influence of rainfall infiltration on slope stability.The influence of relevant parameters on slope stability,and described rainfall infiltration was described.The development of plastic strains at different times and the penetration process of the plastic zone,as well as the safety factor,are used as the basis of judging the stability of the slope.4.Based on the previous work and the ABAQUS finite element software,this thesis will carry out the stability analysis of a slope project under the rainfall condition,and put forward the displacement recommended value of the slope safety monitoring index.