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.
关键词
非饱和土/单/双峰/持水曲线/孔径分布
Key words
unsaturated soil/single/double-peaked/soil-water retention curve/pore size distribution
维普
万方数据