Modelling the effects of pore-water chemistry on the behaviour of unsaturated clays
1 Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, CAS, Chengdu, China
2 Université de Lyon/ENTPE/LGCB-LTDS (UMR CNRS 5513), Vaulx en Velin, France
3 Université de Lyon/INSA Lyon/LGCIE, Villeurbanne, France
4 Department of Civil and Environmental Engineering, Hong Kong Polytechnic University
a Corresponding author: KwaiKwan.WONG@entpe.fr
b formerly PhD student co-supervised by ENTPE-INSA at the time of this work
Due to their various applications in geo-environmental engineering, such as in landfill and nuclear waste disposals, the coupled chemo-hydro-mechanical analysis of expansive soils has gained more and more attention recently. These expansive soils are usually unsaturated under field conditions; therefore the capillary effects need to be taken into account appropriately. For this purpose, based on a rigorous thermodynamic framework (Lei et al., 2014), the authors have extended the chemo-mechanical model of Loret el al. (2002) for saturated homoionic expansive soils to the unsaturated case (Lei, 2015). In this paper, this chemo-mechanical unsaturated model is adopted to simulate the chemo-elastic-plastic consolidation process of an unsaturated expansive soil layer. Logical tendencies of changes in the chemical, mechanical and hydraulic field quantities are obtained.
© The Authors, published by EDP Sciences, 2016
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