Numerical Simulation of Pile Foundation in Loess High Fill Excavation and Fill Combined Area
In order to analyze the mechanical response characteristics of pile foundation in loess area,the paper established a simulation of pile foundation,simulated and analyzed the deformation and stress characteristics of pile foundation under different material parameters.The results show that with the increase of depth,the lateral resistance of pile foundation is stable at first,then increases(positive friction resistance)and then increases in reverse(negative friction resistance).Increasing raft and raising slope can effectively increase the lateral friction resistance of pile foundation.With the increase of depth,the axial force of pile foundation first increases(the buried depth of pile is less than 20 m)and then decreases(the buried depth of pile is 20～30 m).Increasing raft,raising slope and increasing pile diameter can effectively reduce the axial force of pile,and raising slope can effectively reduce the lateral soil pressure of pile.
High fillExcavation and fill combined areaSimulation simulationPile foundationDeformation characteristicsStress charac-teristic
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