Numerical Simulation Of Reasonable Cpacing Of Pile-wall Supporting Structure Of Highway Slope Under The Condition Of Limited Space

Owing to the comprehensive control scheme of anti-sliding piles and retaining walls can give full play to their respective advantages,Therefore,it’s widely used in slope treatment projects.Due to the influence of landforms,site constraints and engineering costs,the location of anti-slide piles and retaining walls is also constrained,so the reasonable spacing between piles and walls needs further discussion.This paper takes the No.3 landslide of a certain section of Jinbian Highway as a research object,and adopts numerical simulation methods to study the slope stability of different pile-wall spacing.The specific research is as follows:(1)The preliminary design of the pile-wall composite structure for Landslide treatment project.According to the basic theories of anti-sliding piles and retaining walls,the anti-sliding piles and retaining walls were designed for the No.3 landslide treatment project at a tender section of Jinbian Highway.On the basic of the engineering environmental conditions,nine different types of pile-wall spacing schemes were proposed(2)The effect of pile-wall spacing change on slope stability.By using numerical simulation methods,nine different pile-wall spacing schemes were numerically simulated under natural and rainfall conditions,and the pile-wall spacing was changed within the scope of the study.Thus,The law of the effect on the stability of the whole slope and local soil mass between piles and walls is obtained.It provides the basis for the selection of reasonable pile-wall spacing.(3)The effect of pile-wall spacing change on the displacement and force performance of the retaining structure.Under the natural and rainfall conditions,further in-depth study was made on the effect of the displacement and force performance of the anti-sliding pile body of the retaining structure and the displacement and stress of the wall of the retaining wall while the pile-wall spacing changes within the scope of the study.According to the actual conditions of the slope,the reasonable pile-wall spacing of the slope comprehensive management project was determined.Through this study,the following conclusions are obtained:(1)In the design of pile-wall composite structures of slope engineering,when the structure of the pile and wall is constant,the stability of the slope increases with the increase of the pile-wall spacing.But when the spacing increases to a certain extent,the increase of the spacing has no obvious effect on the slope stability.(2)when the pile-wall spacing reaches about 12.5m,and the pile-wall spacing continues to increase,there will be no clear effect on the No.3 landslide of a certain section of Jinbian Highway slope stability.By taking the site constraints into comprehensive consideration,it is determined that the reasonable pile-wall spacing of the slope is 12.5m.