Study On Slope Stability Analysis And Simulate The Placement Location Of Anti-slide Piles In Adu Landslide In Xuanwei

Anti-slide pile retaining is a common method of landslide prevention and control,it is a more effective supporting measure.For long and narrow landslides,it is difficult to achieve the supporting effect by retaining single row of piles,therefore,there is a multirow anti-slide pile for the classification of retaining support measures.In order to obtain the optimal supporting effect,the optimal placement of piles should be determined.Refer to various studies and papers,this paper proposes 3 retaining schemes based on different pile positions.The optimum retaining scheme is obtained by comparing the overall retaining effect of the slope,the effect of the slope on the pile and the internal force and strain of the pile.The main work of the paper is as follows:First,we collect and collate the data of the landslide in rongsheng village,adu township,xuanwei.Through the slope stability analysis based on the limit equilibrium method and the numerical simulation method,we determine the position and form of the existing and potential sliding surfaces.Second,by calculating the residual sliding force,we obtained the slippage force,residual slippage force and anti-slippage force of the slippage body.The slice where the maximum value of the three forces is located is selected for pile layout.We adopt dynamic design,that is after each pile placement,a new potential slip surface search is performed,if the potential sliding body does not reach the stable safety factor,the residual sliding force is calculated,we rearrange the pile until it stabilizes.Third,the numerical simulation method was used for further stability analysis,and the analysis of supporting force.Five observation positions were set on the slope as a whole,and 11 points were set at each position,it is used to observe the maximum principal stress,maximum shear stress,x and y direction strain and shear strain of slope before and after support,and compare the reinforcement effect of each supporting scheme to the whole slope.The maximum value of principal stress before and after pile is calculated,which used to compare the effect of slope on pile in different solutions.The maximum stress and strain of pile are calculated,which used to compare the change of anti-slide pile.Through the comparison,we get the optimal support design scheme.In this paper,the limit equilibrium method is used to calculate the slice of largest landslide thrust force,the slice of largest residual glide force,and the slice of largest antiskating force,using these as the location of anti-slide pile,three support schemes are put forward.The limit balance method is used to design the support,And the mechanical analysis is carried out by numerical simulation method,by comprehensive comparison,the optimal support scheme is obtained.It can be used as a new way to determine the design position of anti-slide piles.