Analysis of Coupled Thermo-Hydro-Mechanical Behavior of Unsaturated Soils Based on Theory of Mixtures Ⅰ

QIN Bing; CHEN Zheng-han; FANG Zhen-dong; SUN Shu-guo; FANG Xiang-wei; WANG Ju

doi:10.3879/j.issn.1000-0887.2010.12.008

Volume 31 Issue 12

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QIN Bing, CHEN Zheng-han, FANG Zhen-dong, SUN Shu-guo, FANG Xiang-wei, WANG Ju. Analysis of Coupled Thermo-Hydro-Mechanical Behavior of Unsaturated Soils Based on Theory of Mixtures Ⅰ[J]. Applied Mathematics and Mechanics, 2010, 31(12): 1476-1488. doi: 10.3879/j.issn.1000-0887.2010.12.008

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Analysis of Coupled Thermo-Hydro-Mechanical Behavior of Unsaturated Soils Based on Theory of Mixtures Ⅰ

doi: 10.3879/j.issn.1000-0887.2010.12.008

Department of Architectural and Civil Engineering, Logistical Engineering University, Chongqing 401311, P. R. China;
Beijing Research Institute of Uranium Geology, Beijing 100029, P. R. China

Received Date: 1900-01-01
Rev Recd Date: 2010-10-15
Publish Date: 2010-12-15

Abstract

Abstract

An analysis of coupled thermo-hydro-mechanical behavior of unsaturated soils was presented based on theory of mixtures.Unsaturated soilw as considered as amixture composed of soil skeleton,liquidwater,vapor,dry air and dissolved air.In addition to mass and momentum conservation equations of each component and energy conservation equation of the mixture,the system was closed using other 37 constitutive (or restriction) equations.In virtue of the requirement that the change in water chemical potential was identical with the change in vapor chemical potential,a therm odynamic restriction relationship for phase transition between pore water and pore vapor was formulated,in which the impact of the change in gas pressure on the phase transition was taken into account.Six final governing equations were given in incremental form in term of six prmiary variables,i.e.three displacement components of soil skeleton,water pressure,gas pressure and temperature.The processes involved in the coupled model included the rmal expansions of soil skeleton and soil particle,Soret effec,tphase transition between water and vapor,air dissolution in pore water,deformation of soil skeleton,etc.
- unsaturated soils,
- temperature,
- thermo-hydro-mechanical,
- theory of mixtures

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References(34)

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