Simulation And Mechanism Study Of Progressive Failure Of Soil Slope With Anti-Slide Pile

In recent years,landslides occur frequently in our country due to the construction of civil engineering and earthquake and other natural disasters which has seriously affected people's lives and property safety and economic construction in recent years.Therefore,the complex of the slope stability under different stress conditions for effective and reliable evaluation and analysis is of great significance both in theory and engineering.Slope is composed of inhomogeneous soil,so the distribution of stress in the slope is not uniform.Under load,the stress field in the soil is also uniform.When the soil first reaches the soil shearing strength,shear failure occurred.The stress,which is unable to bear,is transmitted to the adjacent area soil,and the stress of adjacent soil increases,finally the slope instability generates.In this process,the release,transfer and redistribution of stress occurred.The whole process of the gradual destruction of the slope is the real process of landslide in practice.Therefore,the study on the progressive failure process of the slope can reflect the actual state of the slope more accurately,which is the basis for the stability analysis.The anti-slide pile supporting is one of the main measures to control the landslide.It is a kind of special laterally loaded pile,which is based on the interaction between the pile and surrounding soil.The landslide thrust is transferred to a stable stratum,and the thrust of the landslide is balanced by the anchoring action of the stable stratum and the passive resistance.In this paper,the progressive failure process and mechanism of slope reinforced by anti slide piles are studied.Large general software ABAQUS is used,and soil slope and support slope are studied by the 3D numerical simulation.Basis on the strength reduction method,the progressive failure process of layered soil slope is simulated.Research the failure process of reinforced with piles of slope.The article mainly includes the following three parts:Firstly the best position of slope reinforcement,pile spacing and anchorage depth of anti-slide piles are determined,then the stress condition before and after the pile is analyzed,as well as the safety factor of slope under different influence factors.Then,based on the test of pile foundation,the numerical simulation of low strain detection for various kinds of defect piles is carried out.Anti-slide pile reinforcement considering initial defect is studied,and the influence of the slope on the progressive failure of slope is analyzed.Suggestions for practical projects are given.Finally,The influence of the initial inhomogeneity of soil on the progressive failure process of the slope is studied by setting the initial defect area.The different material parameters are set up for the model element,so as to weaken and strengthen the defect element.A systematic study on the stability of initial defect slope reinforced by anti-slide piles is carried out.Development process of strain localization region is simulated,the overall and local stress-strain relationship and safety factor are obtained,as well as the strain curves and strain curves of characteristic elements.The mechanism of slope deformation is analyzed and suggestions for practical engineering are put forward.