METHOD OF INTEGRATED ANALYSIS ON RAINFALL INFILTRATION AND SLOPE STABILITY OF UNSATURATED SANDY SOIL GROUND MODEL AND SYSTEM THEREOF

摘要

According to embodiments of the present invention, a method of integrated analysis on rainfall infiltration and slope stability of an unsaturated sandy soil ground model by using a computer may include: a step of a computer receiving the input of mechanical property values, including an elastic modulus, a Poisson′s ratio, shear strength, adhesive strength, and an internal friction angle, and hydraulic physical property values, including a saturated water permeability coefficient, an unsaturated water permeability coefficient, initial capillary suction force, a soil-water characteristic curve, porosity, density, saturation, and pore hydraulic pressure; and a step of calculating displacement in a normal state, hydraulic pore pressure in a normal state, and pore air pressure in a normal state of the unsaturated ground without previous rainfall by performing finite element analysis by using a first governing equation, based on a force equilibrium equation with respect to stress and gravity imposed on soil particles, a second governing equation, which is based on law of conservation of mass and uses the speed of soil particles of the unsaturated soil and the pore hydraulic pressure in the soil particles as unknown values, and a constitutive equation based on a Drucker Prager model modified to change inclination of a yield surface depending on saturation of the ground.;COPYRIGHT KIPO 2015