散体-柔性桩组合和散体-刚性桩组合复合地基的固结解

摘要

在考虑散体桩涂抹作用非散体桩对下卧层排水通道的减弱作用的基础上,依据应力条件下的平衡方程和连续条件下的固结方程,由假定的无穷级数解,推导出特征方程,进而得到散体桩-柔性桩组合和散体桩-刚性桩组合时的多元复合地基固结解析解,经与实例数值计算结果进行对比表明,该解析解基本与数值解吻合.解析解计算结果表明,土层的固结快慢与各自的渗透系数和压缩模量有关.土层渗透系数越大,刚度越大,则孔压越小,固结越快;桩径比越小,桩体刚度越大,则固结越快.说明该分析方法是可行的,且具有一定的工程应用参考价值.%Taking into account the role of daub effect of loose pile and the weaken effect of other piles on drainage channels,on the basis of the stress conditions based on equilibrium equations and continuity equation under the conditions of consolidation,analytical solution of loose-flexible piles combination and loose-rigid pile combination of the composite foundation is obtained by the assumption that the infinite series solution. Examples of comparison between numerical and analytical results show that the basic analytical solution agrees well with numerical solutions. The consolidation speed of the composite foundation is relevant to the permeability coefficient and the compression modulus. The composite foundation consolidates rapidly when it has large permeability coefficient and the compression module. The results show that the proposed method is feasible.