Numerical Simulation Analysis And Application Of Anti-slide Pile Reinforcement Slope

China is one of the countries who has the worst landslides in the world.As the landslide will destroy or flood farmland,buildings and roads,causing serious economic losses and casualties,so the stability of the landslide and reinforcement methods has attracted the attention of academic and engineering community.Through researches of experts and scholars,it is found that anti-slide piles have strong reinforcement ability and preventation effect,and are widely used in engineering practice.In this paper,based on the finite element strength reduction method,combined with the example analysis and the practical engineering case,we analyzes the relationship between the anti-slide pile and the soil,and obtains the overall safety factor of the slope,the critical slip surface and the optimal design method of anti slide pile.The following work was carried out between the piles and the side slope soils:The effect of two different cross sections(circular and rectangular)on the sliding resistance of anti slide piles was discussed,as well as the influence of pile position,pile spacing and pile diameter ratio,pile length and other factors on the safety factor of slope and the position of sliding surface in slope failure.The main research methods are as follows:(1)The basic theory of the slope reinforcement of anti-slide pile was summarized,,and the physical mechanical parameters of the slope were analyzed.Based on the basic mechanical properties and mechanical parameters of landslide soil,indoor geotechnical test research,including the slip soil test,direct shear test and coMPaction test,we obtained the mechanical parameters c and?,and applied it to the study model,analyzing the changing law of sliding soil.(2)When the sectional area and other conditions were the same,only the shape of the cross section was changed,The anti-sliding ability and safety of rectangular section pile and circular section pile were discussed.Besides,changing the length and width of the rectangular pile with the same cross-sectional area,the resistance effect and safety of anti sliding edge on slope were studied.(3)Only considerring the safety situation,according to the different S/B(pilespacing and pile diameter ratio),the optimal reinforcement position of the anti-slide pile was obtained when changing the position of the pile from the bottom to the top of the slope.In addition,on the basis of multiple sets of data,finding the relationship between them,and fitting the data to analyze the optimal location of the reinforcement.(4)According to the optimal position of the reinforced pile in the slope,and making sure the pile cross-sectional area and the pile same,the relationship between the reasonable anchorage length and the pile length was discussed while reinforced pile length was changing.(5)Taking the landslide in the middle section of Deguang Road in Daguan District of Anqing City as the background,using the finite element strength reduction technique to control the landslide of H1.through the simplified calculation,the rectangular section type pile and the reasonable anchoring depth are used to carry out the slope reinforcement scheme coMParison The co MParison of monitoring data and numerical calculation is used to judge the consistency of slope stability,which can provide guidance for similar projects.