Multi-field coupling process of heat-moisture-salt in unsaturated soil

doi:10.11779/CJGE201905003

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	Multi-field coupling process of heat-moisture-salt in unsaturated soil
	Zhou, Feng-Xi 1,2; Gao, Guo-Yao 1
刊名	Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering
	2019-05-01
卷号	41 期号:5 页码:813-820
关键词	Boundary conditions Energy conservation Frequency domain analysis Geotechnical engineering Laplace transforms Moisture Nonlinear equations Pore pressure Porous materials Soil conservation Soils Temperature Time domain analysis Distribution of temperature Energy conservation equations Hausdorff moment problems Mass and energy conservation Non-steady-state conditions Shooting methods Unsaturated soil Unsteady state conditions
ISSN号	10004548
DOI	10.11779/CJGE201905003
英文摘要	On the basis of porous media theory, the multi-field coupling problem of temperature-moisture-salt in unsaturated soils under non-steady state conditions is studied. Considering that the pores are filled with liquid water, dissolved salts, water vapor and dry gas, the mass conservation equations for water, gas and salt in unsaturated soils and the relevant energy conservation equations are obtained on the basis of mass and energy conservation. For the one-dimensional unsteady state problem, the state equations for the problem are obtained by selecting temperature, pore pressure, pore water pressure, salt solution concentration and their derivatives as the state variables. The Laplace transform is used to transform the state equations in the time domain to those in the frequency one. Under the given boundary conditions, the shooting method is used to solve the strongly coupled nonlinear variable coefficient differential equations. The stability algorithm based on the Hausdorff moment problem transforms the numerical solutions in the frequency domain to those in the time one, and the validity of the model is verified by comparing with the existing experimental results. On the basis of numerical examples and parameters, the influences of pressure gradient, temperature gradient and porosity on the distribution of temperature field, water field and salt field in unsaturated soils are discussed. © 2019, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
语种	中文
出版者	Chinese Society of Civil Engineering
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114251]
专题	土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhou, Feng-Xi,Gao, Guo-Yao. Multi-field coupling process of heat-moisture-salt in unsaturated soil[J]. Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering,2019,41(5):813-820.
APA	Zhou, Feng-Xi,&Gao, Guo-Yao.(2019).Multi-field coupling process of heat-moisture-salt in unsaturated soil.Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering,41(5),813-820.
MLA	Zhou, Feng-Xi,et al."Multi-field coupling process of heat-moisture-salt in unsaturated soil".Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering 41.5(2019):813-820.