真空预压下砂井地基非线性固结分析

Nonlinear Consolidation Analysis of Sand Drain Foundation under Vacuum Preloading

本文考虑砂井地基既存在径向渗流也存在竖向渗流,土体渗透系数既随固结过程非线性变化也随空间变化,土体压缩模量在固结过程中非线性变化,真空度沿砂井线性减小等条件,得到了一个真空预压下较符合工程实际的砂井地基非线性固结解析解,并对地基的非线性固结性状进行了分析讨论。

Based on the radial and vertical seepage existing in sand drain foundation,the nonlinear and spatial changes of the permeability coefficient of soil mass,the nonlinear variation of the compression modulus of soil mass,and the linear decrease of vacuum degree along the sand drain during the consolidation process,a nonlinear consolidation solution of sand drain foundation under vacuum preloading is developed,which applies to real projects.In addition,the nonlinear consolidation behavior of the foundation is analyzed and discussed.