非饱和土固结的混合物理论(Ⅰ)

陈正汉; 谢定义; 刘祖典

非饱和土固结的混合物理论(Ⅰ)

1.
后勤工程学院重庆;
2.
陕西机械学院西安

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出版历程
- 收稿日期: 1992-05-22
- 刊出日期: 1993-02-15

Consolidation Theory of Unsaturated Soil Based on the Theory of Mixture(Ⅰ)

1.
Logistical Engineering College, Chongqing;
2.
Shanxi Mechanical College, Xi'an

摘要

摘要: 非饱和土是由土粒、水、气组成的三相介质,本文以混合物理论为基础研究了非饱和土的固结问题.文中导出了各向异性多孔介质及非饱和土的有效应力的理论公式,把有效应力原理和Curie对称原理作为非饱和土的两个重要的本构原理,建立了非饱和土固结的数学模型:由25个方程求解25个未知量.在增量线性化的情况下,本模型简化为5个控制方程求解5个未知量:3个固相位移、孔隙水压力和孔隙气压力.模型中包含7个材料参数,都可由试验测定,便于工程应用.Biot理论是本模型的特例.
- 非饱和土 /
- 固结 /
- 混合物理论 /
- 有效应力 /
- Curie对称原理
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 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.
- unsaturated soil /
- consolidation /
- theory of mixture /
- effective stress /
- the principle of Curie symmetry

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参考文献(26)

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