FINITE ELEMENT ANALYSIS OF FACTORS INFLUENCING COMPOSITE FOUNDATION SETTLEMENT UNDER EMBANKMENT

Since piles are set into a composite foundation under an embankment, it can not be directly analyzed in the plane strain way . To analyze the factors influencing its settlement, a representative segment method is developed and 3-D analysis of composite foundation settlement under embankment is done. Compared with the traditional plane strain method that needs to unreasonably suppose the piles as walls, the representative segment method is more reasonable. The changing law of the normalized compressive deformation of stabilized layer and sub- layer of a composite foundation under an embankment is finally analyzed by FEM and ABAQUS program.