Abstract: Parametric studies were performed on the factors that affect the p~y curves that used for the marine sandy soils. The targets are the displacement and rotation on the pile head, maximum bending moment, maximum shear force in the pile and soil reaction on the pile, etc. The results indicate that the internal friction angle and the pile stiffness EI are the sensitive factors. The effective unit weight is the non-sensitive factor.

Key words: Sandy Soils, Soil-Pile Interaction; p~y Curve, Parameter Sensitivity