| Issue |
E3S Web Conf.
Volume 195, 2020
4th European Conference on Unsaturated Soils (E-UNSAT 2020)
|
|
|---|---|---|
| Article Number | 02007 | |
| Number of page(s) | 5 | |
| Section | Teoretical and Numerical Models | |
| DOI | https://doi.org/10.1051/e3sconf/202019502007 | |
| Published online | 16 October 2020 | |
Bounding surface constitutive model for unsaturated soils considering microscopic pore structure and bonding effect
1 Beijing Jiaotong University, Key Laboratory of Urban Underground Engineering of Ministry of Education, 100044 Beijing, China
2 Beijing Jiaotong University, School of Civil Engineering and Architecture, 100044 Beijing, China
3 Henan Provincial Department of Transportation, 450018 Zhengzhou, China
*
This article presents a bounding surface model for unsaturated soils by using skeleton stress and bonding variable based on microcosmic pore structure as constitutive variables. A Hydraulic hysteresis soil-water characteristic curve model considering deformation and hydraulic hysteresis is combined to achieve hydraulic coupling. The proposed model can capture the change of the inter-particles bonding effect in the deformation process of unsaturated soils and accurately predict the hydraulic mechanical behavior of unsaturated soils under complicated loading paths and wetting-drying cycles. The validity of the proposed model is confirmed by the results of unsaturated isotropic compression tests, wetting-drying cycles tests and unsaturated triaxial shear tests reported in the literature.
© The Authors, published by EDP Sciences 2020
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