EFFECT OF TEMPERATURE ON HYDRAULIC PARAMETERS OF LOESS

This paper tries to understand the effect of temperature on hydraulic parameters of loess. It conducts a combined study of the measurement device for determining hydraulic parameters of saturated-unsaturated soils under variable temperature and theoretical analysis. It examines the variation of the permeability coefficient parameters, the water capacity and the diffusion rate due to temperature changes. The results show that the temperature has a significant effect on the saturate permeability coefficient parameters and that the freeze-thaw cycle times are the important factors influencing the saturated permeability coefficient. The unsaturated permeability coefficient and diffusion rate of loess are the function of temperature and moisture content, while the water capacity is a function of moisture content. Hydrodynamic viscous coefficient decreases with the increase of temperature which is a key factor on the increase of the above parameters.