A numerical study of coupled consolidation in unsaturated soils
A numerical study of coupled consolidation in unsaturated soils
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DOI：
10.1139/t98-065
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发表时间：
1998-12
影响因子：
3.6
通讯作者：
T. T. Wong-T.;D. Fredlund;J. Krahn
中科院分区：
文献类型：
--
作者：
T. T. Wong-T.;D. Fredlund;J. Krahn
本文首先介绍了非饱和土固结理论耦合公式的数值实现。所开发的计算机代码进行了验证，使用Mandel-Cryer问题，然后被施加到耦合的多维固结问题的解决方案。使用参数的研究，它表明，在非饱和土中，Mandel-Cryer效应被抑制，在非饱和土中的固结过程中的土-水特征曲线的形状显着的影响。最后，将所建立的模型用于非饱和-饱和土柱的固结分析。分析结果表明，经典的“不排水”孔隙水压力响应的外部施加的负载只发生在饱和区，而孔隙水压力响应是在非饱和区被抑制。本文还介绍了一种从实验室试验中导出非饱和土分析所需的两个附加材料参数之一的方法。
This paper first describes the numerical implementation of the coupled formulation for the theory of consolidation of unsaturated soils. The developed computer code is verified using the Mandel-Cryer problem and then is applied to the solution of coupled multidimensional consolidation problems. Using a parametric study, it is demonstrated that, in unsaturated soils, the Mandel-Cryer effect is suppressed and the consolidation process in unsaturated soils is affected significantly by the shape of the soil-water characteristic curve. Finally, the developed model is used to analyze the consolidation of an unsaturated-saturated soil column. Analysis results indicate that the classical "undrained" pore-water pressure response to an externally applied load only occurs in the saturated zone while the pore-water pressure response is subdued in the unsaturated zone. This paper also shows a method of deriving one of the two additional material parameters required for the analysis of unsaturated soils from laboratory...