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DOI	10.1016/j.compgeo.2021.104094
	Study on water and salt migration and deformation properties of unsaturated saline soil under a temperature gradient considering salt adsorption: Numerical simulation and experimental verification
	Zhou, Lizeng; Zhou, Fengxi; Ying, Sai; Li, Shuangyang
通讯作者	Zhou, FX (通讯作者)，Lanzhou Univ Technol, Coll Civil Engn, Lanzhou 730050, Peoples R China.
发表日期	2021
ISSN	0266-352X
EISSN	1873-7633
卷号	134
英文摘要	Based on porous media theory and the principle of continuum mechanics, a mathematical model is established to describe a fully coupled process in a thermo-hydro-solute-gas-mechanical multi-field under a temperature gradient. The model considers the influence of factors, such as porosity evolution, water seepage and its evaporation?condensation, gas transport, salt adsorption/precipitation-dissolution dynamic conversion process, solid particles and pore fluid compressibility. Comsol Multiphysics is used to numerically simulate the previously mentioned multi-field coupling process. In the simulation process, some important physical parameters (such as porosity and medium density) depend on state variables (such as temperature, pore water pressure and salt content). The mathematical model and simulation results are verified through the actual measurement results of the indoor test. Thus, salt adsorption influences the heat and mass transfer process and deformation characteristics of unsaturated saline soil. The results show that the model can better reveal the water and salt transfer mechanism and deformation mechanism of unsaturated saline soil under the action of a temperature gradient, adsorption effects on the heat and mass transfer process and its deformation characteristics by affecting the porosity of the soil. Although in the process of establishing the theoretical model, the elastic constitutive model (including the effective stress principle) is used to describe the momentum conservation of the soil. Additionally, the study of salt adsorption provides theoretical preparation for further research on salt expansion in saline soil.
关键词	MULTIPHASE FLOW EQUATIONS HEAT TRANSPORT MEDIA MODEL
英文关键词	Unsaturated saline soil; Water-salt migration; Deformation properties; Desorption-adsorption effect; Numerical simulation; Experimental verification
语种	英语
WOS研究方向	Computer Science ; Engineering ; Geology
WOS类目	Computer Science, Interdisciplinary Applications ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS记录号	WOS:000647557900008
来源期刊	COMPUTERS AND GEOTECHNICS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254885
作者单位	[Zhou, Lizeng; Zhou, Fengxi] Lanzhou Univ Technol, Coll Civil Engn, Lanzhou 730050, Peoples R China; [Zhou, Fengxi; Li, Shuangyang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Ying, Sai] Yangtze Normal Univ, Engn Res Ctr Hlth Monitoring Bldg Life Cycle & Di, Chongqing 408100, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Lizeng,Zhou, Fengxi,Ying, Sai,et al. Study on water and salt migration and deformation properties of unsaturated saline soil under a temperature gradient considering salt adsorption: Numerical simulation and experimental verification[J]. 中国科学院西北生态环境资源研究院,2021,134.
APA	Zhou, Lizeng,Zhou, Fengxi,Ying, Sai,&Li, Shuangyang.(2021).Study on water and salt migration and deformation properties of unsaturated saline soil under a temperature gradient considering salt adsorption: Numerical simulation and experimental verification.COMPUTERS AND GEOTECHNICS,134.
MLA	Zhou, Lizeng,et al."Study on water and salt migration and deformation properties of unsaturated saline soil under a temperature gradient considering salt adsorption: Numerical simulation and experimental verification".COMPUTERS AND GEOTECHNICS 134(2021).