| Issue |
E3S Web Conf.
Volume 195, 2020
4th European Conference on Unsaturated Soils (E-UNSAT 2020)
|
|
|---|---|---|
| Article Number | 02014 | |
| Number of page(s) | 6 | |
| Section | Teoretical and Numerical Models | |
| DOI | https://doi.org/10.1051/e3sconf/202019502014 | |
| Published online | 16 October 2020 | |
A deformation-dependent soil-water characteristic surface model considering hysteresis
1 Key Laboratory of Urban Underground Engineering, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
2 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
3 Henan Provincial Department of Transportation, Zhengzhou Henan 450000, China
* Corresponding author: guoqing.cai@bjtu.edu.cn
The soil-water characteristic surface model plays an essential part in predicting the hydraulic behaviour of unsaturated soils. Based on the theory of plasticity bounding surface, this paper presents a three-dimensional soil-water characteristic surface model considering the effects of deformation and hysteresis. Suction and void ratio are adopted as independent variables, while the degree of saturation is adopted as a dependent variable. A new mapping rule is used where the distance between the current position and its image point can be calculated as a difference in the degree of saturation axis. The model is verified by comparing with drying-wetting tests on bentonite/kaolin mix and pearl clay. The efficiency of the proposed model is proven by validation tests.
© The Authors, published by EDP Sciences 2020
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