Experimental And Numerical Simulation Study On Influencing Factors And Design Optimization Of Anti Slide Pile

Anti slide pile is a pile that penetrates the slide body and embeds into the stable rock stratum.It relies on the soil arch effect to block the sliding thrust produced by the slide body of the slope to achieve the anti slide purpose.Because of the advantages of small earthwork,low cost,good anti slide effect and convenient construction,it has been widely used in the field of landslide treatment.However,at present,the theoretical research of anti slide pile lags behind the practical application,especially in the analysis of various factors in the reinforcement of anti slide pile and the parameter optimization of anti slide pile are not comprehensive,systematic and in-depth,and there are still many problems worthy of study.(1)Model test study on the influence factors of anti slide pile strengthening slopeBased on the self-designed anti slide pile anchoring mechanism model test device,the soil arch effect test is carried out,the influence of various test parameters on soil arch effect and anti slide pile body is studied,and the mechanical characteristics and reinforcement mechanism of anti slide pile are revealed.(2)Study on the optimization of design parameters of the slope strengthened by anti slide pilesUsing FLAC3 D software to establish the numerical simulation model of the anti slide pile with prestressed anchor cable,and analyze the control variables of various influencing factors(anti slide pile section shape,anti slide pile buried depth,prestress size,anchor cable layout angle,anti slide pile buried way,landslide thrust form,post pile filler property),reveal the force law of the anti slide pile,and optimize the parameters research.(3)Numerical simulation study on factors influencing soil arching effect of anti slide pile on slopeThe PFC software is used to establish the particle flow calculation model.The research content corresponds to the test part and FLAC3 D numerical simulation part,and further analyzes the soil arching effect and the force on the pile body.For the single row piles,change the section shape and surface roughness of the anti slide piles,and obtain the change rule of the soil arching form and the soil stress between the piles.For the double row piles,change the anti slide piles respectively Row spacing,row spacing,arrangement form,soil stress data between piles are analyzed to reveal the action mechanism of soil arching effect.