FLUIDITY AND PORE WATER PRESSURE VARIATION IN THE SANDY GROUND INDUCED BY SURFACE LAYER FLOW USING DEM-CFD

Abstract

 The object of this study is to clarified the mechanism of scouring in sandy ground due to the tractive force and seepage force. Especially, in this paper, are discussed to generating of excess pore water pressure induced by free surface flow using the movable bed experiment and CFD-DEM simulation which is considered by the interaction between soil particle and fluid. As a result, seepage flow in the ground surface was generated by free surface flow and the excess pore water pressure was induced by the difference in velocities around the surface and the shear deformation in fluid layer with 4 times thickness of mean particle diameter closed to the surface of ground.