One-Dimensional Consolidation Analysis of Unsaturated Soils Subjected to Time-Dependent Loading
One-Dimensional Consolidation Analysis of Unsaturated Soils Subjected to Time-Dependent Loading
复制标题
DOI：
10.1061/(asce)gm.1943-5622.0000504
复制
发表时间：
2016-04
影响因子：
3.7
通讯作者：
L. Ho;B. Fatahi
中科院分区：
文献类型：
--
作者：
L. Ho;B. Fatahi
摘要在固结过程中，多余的孔隙水压力和孔隙空气压力通过渗透边界被强制消散。这种消散过程不可避免地导致土壤体积的减少，从而导致沉降。这种现象可以根据菲克定律（关于空气相）和达西定律（关于水相）通过非均匀流动控制方程进行数学描述。本文讨论了非饱和土层在各种随时间变化的外荷载作用下，超孔隙水压力和超孔隙气压力的消散和沉降。利用本征函数展开和拉普拉斯变换技术，从空气和水的控制流方程中导出了一个解析解。本征函数和本征值是通解的一部分，可以使用单向或双向排水边界条件获得。另一方面，四种类型的外部载荷，即斜坡，渐近，正弦，阻尼正弦波，是数学…
AbstractDuring consolidation, excess pore-air and pore-water pressures are forced to dissipate through permeable boundaries. This dissipation process inevitably results in the reduction of the soil volume, and thus settlement. Such a phenomenon can be mathematically described by inhomogeneous governing equations of flow according to Fick’s (with respect to air phase) and Darcy’s (with respect to water phase) laws. This paper discusses the dissipation of excess pore-air and pore-water pressures and settlement of an unsaturated soil layer subjected to various time-dependent external loadings. An analytical solution is derived from the governing flow equations with respect to air and water using eigenfunction expansion and Laplace-transform techniques. Eigenfunctions and eigenvalues are parts of the general solution and can be obtained using one-way or two-way drainage boundary conditions. On the other hand, four types of external loadings, namely ramping, asymptotic, sinusoid, and damped sine wave, are math...