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

CORC > 兰州理工大学 > 兰州理工大学 > 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, Fengxi 1,2; Ying, Sai 3; Li, Shuangyang 2
刊名	Computers and Geotechnics
	2021-06-01
卷号	134
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
ISSN号	0266-352X
DOI	10.1016/j.compgeo.2021.104094
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. © 2021 Elsevier Ltd
WOS研究方向	Computer Science ; Engineering ; Geology
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000647557900008
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147692]
专题	土木工程学院
作者单位	1.College of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-environment and Resources Chinese Academy of Sciences, Lanzhou; Gansu; 730000, China; 3.Engineering Research Center for Health Monitoring in Building Life Cycle and Disaster Prevention, Yangtze Normal University, Fuling; Chongqing; 408100, 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]. 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).