Calculation method of pile-supported geogrid-reinforced embankment based on elastic large deflection theory

Based on the large deflection theory of elastic sheet, the analysis on the cushion of PCC pile composite foundation has been made, and the formulas of deformation and force have been got. According to the soil arching effect in landfill, the equilibrium analysis on landfill has also been made. Based on the theoretic analyses on the cushion and landfill, the method of calculating differential settlements and stress ratio between pile and soil has been drawn, taking the deformation compatibility condition of landfill and cushion into consideration. Finally, with the comparison between calculated and measured results, the conclusion that this method is correct and can meet the requirement of practical engineering has been drawn.