Analysis of Deformation Characteristics of Prestressed Pile-anchor Combined Retaining Structure Supporing a Cutting Slope
Based on the cutting slope of a highway,this paper conducts on-site monitoring of the deformation characteristics of the cutting slope combined prestressed pile-anchor supporting structure.Therefore,this paper obtains the law of the lateral displacement of the pile top and the horizontal displacement of the soil behind the pile with time and space during the construction process.FLAC3D software is used to calculate and analyze the deformation of the supporting structure during the slope excavation.The calculated results are compared with the field monitoring results,and the vertical displacement distribution of soil at the top and bottom of the slope during the excavation is studied.The analysis results show that the prestressed anchor has a certain restraint effect on the horizontal displacement of the pile top and the horizontal displacement of the soil behind the pile.During the excavation process,the horizontal displacement of the soil presents a tendency to be smaller at the top and toe of the slope,and larger at the middle part.The increase in the horizontal displacement of the soil mainly occurs in the middle of the excavation.During the excavation process,the horizontal displacements of pile top,deep soil,vertical displacements of slope top and bottom soil are all in reasonable range.The size of the prestress will affect the supporting effect of the pile-anchor supporting structure,and setting the appropriate prestress can effectively reduce the deformation of the supporting structure.
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