Stability Analysis Of Xinqiao River Slope On Considering Pile-Soil Interaction

China has a vast territory and most of the terrain is mountainous hills.Affected by weather,human geological conditions and other factors,landslide disasters occur frequently.Landslides are a common and widely distributed geological disaster in the form of slope failure.As an effective landslide supporting structure,anti-slide pile has been widely used and popularized in landslide management projects due to its simple structure,mature technology,and convenient construction.For a long time,the interaction between landslide body and anti-slide pile has been an important research topic in the field of geotechnical engineering and geological engineering.In order to deeply analyze the mechanism of the landslide body and the anti-slide pile,this paper relies on the comprehensive renovation project of the Xinqiao River slope.First,combining the previous research on the formation mechanism of the soil arching,based on the Mohr-Coulomb yield criterion,the analysis of soil arch mechanical model is carried out;the calculation method of the internal force of the elastic anti-slide pile body is explained in detail.Theoretical analysis and finite element numerical simulation method are used to explore the effects of the soil arching effect of the sliding piles and the internal forces of the pile body,so as to analyze the mechanical characteristics between the piles,the soil behind the piles,and the internal force of pile body.Optimization provides a reference.This article mainly researches and discusses from the following aspects:1)By reviewing a large number of literatures,the research status of soil arching,internal force analysis of anti-sliding piles,and slope stability analysis is summarized,the research content of this paper is determined,and the formation mechanism of soil arch effect,the constitutive model of soil and anti-slide piles,the calculation model of soil arch mechanics,the method for judging arching behind piles,and the theoretical calculation method of internal force of anti-slide piles are introduced in detail.2)Establish plane strain soil arch models using numerical simulation methods to investigate the influence of the cross-sectional shape of the anti-sliding pile,the roughness of the pile-soil contact surface,the pile spacing,the landslide thrust and the soil shear strength parameters on the soil arching.The mechanism of soil arching between piles is further explained by analyzing the mechanical characteristics of soil stress and soil pressure behind piles.3)By comparing the calculation results of the internal force of the pile body with the theoretical calculation and the finite element numerical calculation,the rationality of the finite element numerical calculation is verified,and the effect of the pile spacing and the pile position on the internal force of the pile body is further explored,which provides reference for optimization of slope reinforcement scheme.4)For the project case,using the idea of orthogonal test design,through the variance analysis of slope stability safety factor under different anti-sliding pile design schemes,the effects of pile spacing,pile diameter and pile length on slope stability are discussed.Significance.Based on the above studies,the optimization study of the slope reinforcement scheme is carried out.