Unimodal/bimodal soil-water retention curve based on pore size distribution function
The unsaturated soil water retention curve is the basis for studying the strength,permeability,and constitutive theory of unsaturated soil.Currently,most models for unsaturated soil-water retention curves(SWRC)are aimed at single-peaked SWRC,and there is relatively little research on double-peaked SWRC models.In this paper,by analyzing the pore size distribution characteristics of single/double-peaked pore structure soils and using the relationship between soil suction and pore size established by the Young-Laplace equation,the lognormal distribution function is used to describe the pore size distribution characteristics of single/double-peaked soils.A model whose parameters with a clear physical meaning is further proposed to simulate single/double-peaked SWRC.Finally,water retention test data from different types of soils in the literature were selected to verify the model,and the results showed that the model can simulate single/double-peaked SWRC of different types of soils well.
unsaturated soilsingle/double-peakedsoil-water retention curvepore size distribution
万方数据
维普
