岩土力学2011，Vol.32Issue(8)：2391-2396,6.
成层非饱和土渗流的耦合解析解
Analytic solution to coupled seepage in layered unsaturated soils
摘要
Abstract
Layered soil such as landfill and cracked soils are often found in engineering. Its coupled infiltration and deformation during rainfall is significant for development of unsaturated soil mechanics. Based on fluid mass conservation, Darcy's law, and the constitutive model proposed by Lloret et al., coupled governing equations for seepage and deformation in unsaturated soils are obtained. The unsaturated coefficient of permeability is expressed using Gardner's model and the water retention characteristics are expressed using Boltzman's model. The analytic solution to the coupled equation is developed by Laplace transformation. The analytic solution and parameter analysis results show that the effect of coupling between unsaturated seepage and deformation is related with time. The modulus related to suction changes F has a marked effect on the pore water pressure. The larger the F ratio values for two-layer soils are, the more slowly the suction dissipates. The results indicate that a large F for the top-layer soil can effectively reduce the coupling effect. Volumetric moisture content changes in two-layer soils play a limited role in the suction distribution.关键词
非饱和土/渗流和变形/耦合/成层土/降雨入渗Key words
unsaturated soil/ seepage and deformation/ coupling/ layered soil/ rainfall infiltration分类
建筑与水利引用本文复制引用
吴礼舟,张利民,黄润秋..成层非饱和土渗流的耦合解析解[J].岩土力学,2011,32(8):2391-2396,6.基金项目
国家自然科学基金(No.40902087):香港Research Grants Council (No.622207) （No.40902087）
教育部科学技术研究重点项目(No.110186):教育部博士点新教师基金(No.20095122120007) （No.110186）
四川省杰出青年学术技术带头人培育计划(No.2010JQ0034). （No.2010JQ0034）
