Construction and experimental analysis of permeability prediction model of unsaturated clay

The calculation process of the traditional test method of unsaturated clay permeability coefficient is complicated, so a prediction model of unsaturated clay permeability is established. The e-lnp curve is drawn through K0 consolidation test of unsaturated remolded clay. The linear relationship between state variables and soil saturation was found, and the influence of unsaturated clay on soil properties was obtained. According to the adsorption storage mechanism and the position of soil compactness in the coordinate system, the characteristic curve of soil moisture and the prediction model of unsaturated clay permeability were established. The permeability test of unsaturated remolded clay is carried out by using transient profile method, and the results show that the model can well describe the change of permeability of unsaturated clay.