ISSN:
1573-2754
Keywords:
unsaturated soil
;
consolidation
;
theory of mixture
;
effective stress
;
the principle of Curie symmetry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Mathematics
,
Physics
Notes:
Abstract Unsaturated soil is a three-phase media and is composed of soil grain, water and gas. In this paper, the consolidation problem of unsaturated soil is investigated based on the theory of mixture. A theoretical formula of effective stress on anisotropic porous media and unsaturated soil is derived. The principle of effective stress and the principle of Curie symmetry are taken as two fundamental constitutive principles of unsaturated soil. A mathematical model of consolidation of unsaturated soil is proposed, which consists of 25 partial differenfial equations with 25 unknowns. With the help of increament linearizing method, the model is reduced to 5 governing equations with 5 unknowns, i.e., the three displacement components of solid phase, the pore water pressure and the pore gas pressure, 7 material parameters are involved in the model and all of them can be measured using soil tests. It is convenient to use the model to engineering practice. The well known Biot's theory is a special case of the model.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02453355
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