- Title
- Modelling water retention and volume change behaviours of unsaturated soils in non-isothermal conditions
- Creator
- Zhou, An-Nan; Sheng, Daichao; Li, Jie
- Relation
- Computers and Geotechnics Vol. 55, p. 1-13
- Publisher Link
- http://dx.doi.org/10.1016/j.compgeo.2013.07.011
- Publisher
- Pergamon Press
- Resource Type
- journal article
- Date
- 2014
- Description
- This study presents a simple approach to modelling the effect of temperature on the soil-water retention curves (SWRCs) of deformable soils and takes into consideration the following two aspects: (1) the effect of temperature on the liquid-gas interfacial tension and (2) temperature-induced deformation of the soil skeleton. The first aspect, the temperature effect, can be modelled using an equation proposed by Grant and Salehzadeh [18], but the second aspect is generally neglected in the literature. To quantify the thermo-hydro-mechanical (THM) deformation of unsaturated soils (i.e., the second aspect mentioned above), a simple volume change equation, referred to as the non-isothermal SFG volumetric equation, is proposed on the basis of the original SFG framework [37]. A three-dimensional THM yield surface in the space of net mean stress, suction and temperature is presented here. The proposed volume change equation is integrated into the non-isothermal SWRC by means of a simple hydro-mechanical coupling law [38]. The performance of the non-isothermal SFG volumetric equation and the non-isothermal SWRC equation is investigated through several numerical examples. A number of experimental results reported in the literature are employed to confirm the validity of the proposed non-isothermal SFG volume change equation and the non-isothermal SWRC equation.
- Subject
- soil–water retention curve; SWRC; volume change; temperature; non-isothermal; thermo-hydro-mechanical coupling; unsaturated soils
- Identifier
- http://hdl.handle.net/1959.13/1295986
- Identifier
- uon:19163
- Identifier
- ISSN:0266-352X
- Language
- eng
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