A Theoretical Framework for Modeling the Chemomechanical Behavior of Unsaturated Soils

doi:10.2136/vzj2013.07.0132

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	A Theoretical Framework for Modeling the Chemomechanical Behavior of Unsaturated Soils
	Wei, Changfu 1,2
刊名	VADOSE ZONE JOURNAL
	2014
卷号	13 期号:9 页码:-
ISSN号	1539-1663
DOI	10.2136/vzj2013.07.0132
英文摘要	A theoretical framework is presented for modeling the chemomechanical behavior of multiphase porous media, in general, and unsaturated soils, in particular, which can address skeletal deformation, fluid flow, heat conduction, solute diffusion, chemical reaction, and phase transition in a consistent and systematic way. A general expression is derived for the electrochemical potential of a fluid species with explicitly accounting for the effects of osmosis, capillarity, and adsorption. The equilibrium behavior of porous media is investigated, and the composition of pore water pressure is identified. Explicit formulations are developed for the effective stress and intergranular stress, with consideration of physicochemical effects. It is shown that the negative water pressure measured by a conventional transducer can be significantly different than the true pore water pressure. It is also theoretically revealed that, other than the soil water characteristic function, a new pressure (or potential) function accounting for the physicochemical effects is generally required in analyzing the coupled chemomechanical processes in unsaturated soils. The new theory is capable of effectively explaining many salient phenomena occurring in water-saturated porous media with a degree of saturation varying from an extremely low value to 100%, including Donnan osmosis, capillary fringe, air entry value, initial hydraulic head during seepage, and pressure solution. The new theory can be used to analyze the multiple coupled physical and chemical processes in the vadose zone.
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
语种	英语
出版者	SOIL SCI SOC AMER
WOS记录号	WOS:000343162600005
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3628]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.Guilin Univ Technol, Coll Civil & Architectural Engn
推荐引用方式 GB/T 7714	Wei, Changfu. A Theoretical Framework for Modeling the Chemomechanical Behavior of Unsaturated Soils[J]. VADOSE ZONE JOURNAL,2014,13(9):-.
APA	Wei, Changfu.(2014).A Theoretical Framework for Modeling the Chemomechanical Behavior of Unsaturated Soils.VADOSE ZONE JOURNAL,13(9),-.
MLA	Wei, Changfu."A Theoretical Framework for Modeling the Chemomechanical Behavior of Unsaturated Soils".VADOSE ZONE JOURNAL 13.9(2014):-.