Estimation of hydraulic conductivity of unsaturated soils under entire suction range

被引：0
|
作者：
Zhai Q. [1 ,2 ,4 ]
Zhu Y.-Y. [1 ,2 ,4 ]
Ye W.-M. [3 ]
Du Y.-J. [4 ]
Dai G.-L. [1 ,2 ,4 ]
Zhao X.-L. [1 ,2 ,4 ]
机构：
[1] Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Bridge Engineering Research Center of Southeast University, Nanjing
[2] School of Civil Engineering, Southeast University, Nanjing
[3] School of Civil Engineering, Tongji University, Shanghai
[4] Southeast University, Nanjing
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2022年 / 44卷 / 04期
关键词：
Capillary flow; Film flow; Hydraulic conductivity function; Pore-size distribution; Vapour flow;
D O I：
10.11779/CJGE202204008
中图分类号：
学科分类号：
摘要：
The hydraulic conductivity of unsaturated soils controls their water flow. Most numerical softwares adopt the hydraulic conductivity function (HCF) as the input parameter to simulate the water flow in unsaturated soils. The accuracy of the inputted HCF has significant effect on the reliability of the simulated results from the seepage analysis. It is noted that most HCFs are proposed based on the theory of capillary flow. It is observed that in the high suction range, the estimated HCF of unsaturated soils from the capillary flow is much lower than what is obtained from the experimental measurement. In this study, the water flows in unsaturated soils are categorized into three forms, including (i) capillary flow, (ii) film flow and (iii) vapour flow. The mathematical models for the HCF of soils corresponding to those three forms of water flow are proposed. Consequently, the total HCF of unsaturated soils under the entire suction range is proposed. © 2022, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
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页码：660 / 668
页数：8
相关论文
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