The Analysis Of Stress And Deformation Of Prestressed Anchor Sheet Pile Wall In High Slope

The retaining structure of prestressed cable anchor-pile sheet wall due to its Structural complexity,system analysis of the prestressed cable anchor-pile sheet wall is still very limited,understanding for working principle in the process of retaining is not clear,the existing design and calculation formula of the prestressed cable anchor-pile sheet wall are not general and accurate enough,especially in the slope stability analysis of combined supporting structure,there no more research results.In this paper,based on domestic and foreign research,stress and deformation of the prestressed cable anchor-pile sheet wall supporting high slope is studied,the specific work is as follows:(1)the working principle of The retaining structure of prestressed cable anchor-pile sheet wall is introduced in detail from the aspects of classification,structure,scope of application and design calculation,and for someone high slope,in order to carry out the research on deformation characteristics of remoulded soil under the condition of optimum water,different properties and different compactnesses.The compression test,which contained 160 specimens in 40 groups,is tested with compression apparatus,could summarize the rule of ei?Pi curves,the vertical pressure-strain curves of remoulded soil,which can be expressed with an best suit formula,and provide an constitutive equation suit for the soil this test researched,and last the subsidence can be forecasted.The results show that: The remoulded soil of silty clay and red sandstone account for respective proportion separately 20% and 80% have the smaller the total amount of deformation than another proportion separately 40% and 60%.The the vertical pressure-strain curves of remoulded soil under the condition of different properties and different compactnesses have all suit for Hyperbola function model.Compared with measured value,the secant modulus method is preferable applicability than the design criterion method for calculate the subsidence of soil.(2)by using the numerical analysis software FLAC3 D to analysis the influence of different prestress on slope by relationships between prestress and pile displacement,prestress and earth pressure acted on pile,prestress and pile shear force,found the effect to slope only control overall displacement by applying prestress is not obvious,with the increase of prestress,lateral displacement of load segment of pile and the retaining plate decreases,soil mechanical properties have changed,earth pressure and shear value obviously increased with the increase of prestress.(3)by using the numerical analysis software FLAC3 D to analysis the influence of the different pile embedded depth on slope by relationships between pile embedded depth and pile displacement,pile embedded depth and earth pressure acted on pile,pile embedded depth and pile shear force,found the effect to slope only control overall displacement by Increase pile embedded depth is not obvious,and with the pile embedded depth increases,lateral displacement of load segment of pile and the retaining plate decreases,but the reduction is limited,soil mechanical properties have changed,embedded section the earth pressure of embedded section due to the soil before the pile is approximately trapezoidal.shear value of pile increased with the increase of pile embedded depth,but the increase of retaining plate is very limited.Moreover,the shear force is reach the maximum near the ground line,the most dangerous section.