CONSOLIDATION HEORY OF UNSATURATED SOIL BASED ON THE THEORY OF MIXTURE(Ⅰ) |
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作者单位: | 1. Logistical Engineering College, Chongqing;2. Shanxi Mechanical College, Xi’an |
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摘 要: | 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 he 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.
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收稿时间: | 22 May 1992 |
Consolidati theory of unsaturated soil based on the theory of mixture (I) |
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Authors: | Chen Zheng-han Xie Ding-yi Liu Zu-dian |
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Institution: | (1) Logistical Engineering College, Chongqing;(2) Shanxi Mechanical College, Xi'an |
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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. |
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Keywords: | unsaturated soil consolidation theory of mixture effective stress the principle of Curie symmetry |
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