西南交通大学学报2012，Vol.47Issue(1)：84-89,6.DOI:10.3969/j.issn.0258-2724.2012.01.014
基于指数形式渗流的成层地基一维固结半解析解
Semi-analytical Solutions for One-Dimensional Consolidation of Layered Soil Obeying Exponential Flow Law
摘要
Abstract
To calculate one-dimensional consolidation settlement of layered soil obeying an exponential flow law, an exponential flow law model was introduced into the classical consolidation theory for layered soil. The governing equation for one-dimensional consolidation of layered soil was established by considering the exponential flow law and time-dependent loading. A semi-analytical method combining the analytical method with numerical discretization was adopted to solve the governing equation. On condition that the exponential flow law is degenerated into the Darcy's flow law, the reliability of semi-analytical solutions was verified by comparing the results of the semi-analytical method with those of the analytical method. Finally, consolidation behaviors under different parameters were analyzed by combining with a case study of the consolidation of double-layered soil obeying an exponential flow law. The results show that it is simple and reliable to apply the semi-analytical method to the one-dimensional consolidation of layered soil obeying an exponential flow law; compared with the bottom soil layer, the flow exponent of upper soil layer has a great effect on the rate of consolidation; the consolidation rate increases with increasing the thickness of soil layer with low compressibility and high permeability; and the faster the loading rate, the faster the rate of consolidation.关键词
一维固结/指数形式渗流/成层地基/半解析法/变荷载Key words
one-dimensional consolidation/ exponential flow/ layered soil/ semi-analytical method/ time-dependent loading分类
建筑与水利引用本文复制引用
李传勋,谢康和,胡安峰..基于指数形式渗流的成层地基一维固结半解析解[J].西南交通大学学报,2012,47(1):84-89,6.基金项目
国家自然科学基金资助项目(50878191 （）
51109092) （）
