Permeability Coefficient of Unsaturated Loess and Its Gaseous and Liquid Water Migration Modeling

Water migration changes the water distribution of loess and significantly affects engineering properties loess. However, because characteristics such as sensitivity special structure, it is still difficult to understand trend The objectives this study are investigate diffusion coefficient soil-water characteristic curve (SWCC) loess, focusing on effect temperature density, establish a mixed equation for gaseous liquid develop new calculation method migration. results show that density with larger content has more significant than less content. Furthermore, matric suction unsaturated while change at normal slight effect. Based data obtained in study, soil permeability was obtained. Moreover, considering gas an derived gas-liquid transfer consistent experimental experiment. migration, proportion during were analyzed.