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

doi:10.1016/j.compgeo.2021.104094

IR > 土木工程学院

	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 1; Zhou, Fengxi1,2 ; Ying, Sai 3; Li, Shuangyang 2
	2021-06
发表期刊	Computers and Geotechnics
ISSN	0266-352X
卷号	134
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. © 2021 Elsevier Ltd
关键词	Adsorption Continuum mechanics Heat transfer Mass transfer Numerical models Porosity Porous materials Saline water Seepage Soil conservation Soils Thermal Engineering Transport properties Deformation Characteristics Deformation properties Desorption-adsorption effect Experimental verification Heat and mass transfer process Migration properties Saline soil Unsaturated saline soil Water and salts Water-salt migration
DOI	10.1016/j.compgeo.2021.104094
收录类别	EI ; SCIE
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
出版者	Elsevier Ltd
EI入藏号	20211010053961
EI主题词	Deformation
EI分类号	444 Water Resources ; 483.1 Soils and Soil Mechanics ; 641.2 Heat Transfer ; 641.3 Mass Transfer ; 802.3 Chemical Operations ; 921 Mathematics ; 931.1 Mechanics ; 931.2 Physical Properties of Gases, Liquids and Solids ; 951 Materials Science
来源库	WOS
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/147692
专题	土木工程学院
通讯作者	Zhou, Fengxi
作者单位	1.Lanzhou Univ Technol, Coll Civil Engn, Lanzhou 730050, Peoples R China; 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; 3.Yangtze Normal Univ, Engn Res Ctr Hlth Monitoring Bldg Life Cycle & Di, Chongqing 408100, Peoples R China
第一作者单位	土木工程学院
通讯作者单位	土木工程学院
第一作者的第一单位	土木工程学院
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]. Computers and Geotechnics,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).