Analysis On Interaction Of Prestressed Anchor Sheet-Pile Wall And Soil

In the process of southwest mountain railway road construction,slope stability problem increasingly attracts more concern,for it related to not just people’s life and property safety, but the safety and effectiveness of the project itself.Therefore, the protection and management of slope has an important theoretical and practical significance. In this paper, study on prestressed anchor sheet-pile wall which is a new type of slope anchor retaining structure, its relationship with the interaction between rock and soil is analyzed.In the first, the structure of prestressed anchor sheet-pile wall is analyzed, the basic components of this form and function of the pile,anchor,sheet,and the applicable conditions of it is described.Then,analyze the reinforcement principle of slope prestressed anchor,point out that the interaction between the prestressed anchor and rock and soil is achieved by the overall effect of reinforcement anchor group which is produced by each row of anchor and rock and soil;analyze the interaction of Prestressed anchor and pile,and give an improved prestressed anchor sheet-pile wall deformation coordination equation,deduce the landslide thrust level design values beared by the anchor piles at each bar on the foundation of knowing the landslide thrust level by anchor design anchoring force formulas.Analyze the formation mechanism of soil arching and load transfer path,analyze the stress state of soil arching and calculate the critical pile spacing which produce horizontal arch.According to several calculation methods and forms of landslide thrust and resistance distribution, propose the actual stress state of prestressed anchor sheet-pile wall.Then use the finite element program FLAC3D to simulate the reinforced slope, aim at material factor for geotechnical and structural design parameters to complete the parameters impact analysis. Study the theory of seismic structures under earthquake establish the calculation model of the earth pressure under earthquake of pile retaining wall plate, derive the basic equations of unearthed pressure strength,then derive the general formula of seismic earth pressure force and the acting point. Introduce and deduce the general calculation methods of prestressed anchor sheet-pile wall seismic earth pressure, give the earth pressure calculation formula of feature points on the pile.Finally,point out the three important reason which causes the damage of sheet-pile wall:insufficient carrying capacity, the mutual movement of piles and soil under earthquake, the damage of secondary level sliding surface under earthquake.