Abstract
Prediction / estimation by seepage flow analysis is possible for the moisture content, groundwater level and water pressure distribution in the slope which is the trigger of the slope collapse at the time of heavy rain. However, since it is usually assumed that the ground physical property is spatially uniform, the non-uniformity observed in the actual slope is not taken into consideration. In this study, we investigated the nature of seepage flow in the slope at heavy rainfall considering pore air flow by two phase flow numerical analysis using nonuniform slope models with variations using a spatial distribution model of hydraulic conductivity. As a result, it is shown that there is a risk of underestimating the pore water pressure of the slope in the case of assuming the field is uniform, and that the influence of pore air may be larger in the nonuniform field.
