Abstract
Internal erosion is often observed in soil structures and it is a geotechnically important phenomenon. Modelling of internal erosin is still in development on the soil deformation due to internal erosion and the evolution law for internal erosion. In the present study, we have formulated a multiphase analysis method for the coupled phenomena including soil skeleton deformation, water flow, internal erosion and soil paticle advection. We have also adopted initiation conditions and the evolution rate equation for internal erosion as constitutive equations. From the numerical calculation for an experiment of suffusion, we have discussed the suffusion mainly focusing on the movement of eroded soil mass.
