Approach for predicting the relative coefficient of permeability of unsaturated soils with different initial void ratios

作者：Cai Guo Qing^*; Sheng Dai Chao; Zhou An Nan

来源：Chinese Journal of Geotechnical Engineering, 2014, 36(5): 827-835.

DOI：10.11779/CJGE201405004

• Coefficient of permeability
• Degree of saturations
• Initial void ratios
• Permeability functions
• Relative coefficients
• Soil-water characteristic curve
• The soil-water characteristic curves (SWCC)
• Unsaturated soil

A simple approach is proposed to quantify the effect of the initial void ratio on the relative coefficient of permeability for unsaturated soils based on the incremental relationship between the degree of saturation and the initial void ratio and the prediction of the permeability function for unsaturated soils by use of the soil-water characteristic curve (SWCC). For a given soil and the SWCC equation, only one additional parameter is introduced, which can be conveniently calibrated by the conventional SWCC tests. The relative coefficient of permeability for the same soil with different initial void ratios can be predicted by this approach. The proposed approach is validated through experimental data from the literatures in which both the SWCCs and the coefficients of permeability with different initial void ratios are measured.

• 出版日期2014
• 单位北京交通大学