TY - JOUR
T1 - Effect of threshold suction on the prediction of the permeability function by using the statistical method
AU - Tang, Lei
AU - Tian, Gang
AU - Dai, Guoliang
AU - Zhai, Qian
AU - Rahardjo, Harianto
AU - Satyanaga, Alfrendo
N1 - Funding Information:
The authors would like to acknowledge the financial supports received from the National Natural Science Foundation of China (No. 52078128 ), China Huaneng Group Co. Ltd. (No. HNKJ19-H17 ).
Publisher Copyright:
© 2022 The Authors
PY - 2022/6
Y1 - 2022/6
N2 - The statistical method is commonly adopted by many researchers for the estimation of the permeability function of unsaturated soil. The statistical method is developed based on the assumption that the pores are randomly connected to each other. Water can only flow through the water phase in those pores. In other words, the statistical method is only applicable when the water phase in soil is in a continuous condition. However, past studies indicated that the water phase in unsaturated soil became discontinuous when the soil suction goes beyond the residual suction. When the water phase is discontinuous, the water in some of the pores may not be able to provide the flow path because water cannot flow into the surrounding pores. Therefore, there will be a threshold suction where the statistical method becomes inapplicable for suctions beyond this threshold value. In this parametric study, the effect of the threshold suction on the estimated permeability function obtained from the statistical method was investigated.
AB - The statistical method is commonly adopted by many researchers for the estimation of the permeability function of unsaturated soil. The statistical method is developed based on the assumption that the pores are randomly connected to each other. Water can only flow through the water phase in those pores. In other words, the statistical method is only applicable when the water phase in soil is in a continuous condition. However, past studies indicated that the water phase in unsaturated soil became discontinuous when the soil suction goes beyond the residual suction. When the water phase is discontinuous, the water in some of the pores may not be able to provide the flow path because water cannot flow into the surrounding pores. Therefore, there will be a threshold suction where the statistical method becomes inapplicable for suctions beyond this threshold value. In this parametric study, the effect of the threshold suction on the estimated permeability function obtained from the statistical method was investigated.
KW - Capillary flow
KW - Permeability function
KW - Soil-water characteristic curve
KW - Statistical method
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U2 - 10.1016/j.rineng.2022.100456
DO - 10.1016/j.rineng.2022.100456
M3 - Article
AN - SCOPUS:85131462346
SN - 2590-1230
VL - 14
JO - Results in Engineering
JF - Results in Engineering
M1 - 100456
ER -