考虑固结参数变化时砂井地基的非线性径向固结

传统的砂井地基径向固结理论基于小应变理论，所以假设固结过程中体积压缩系数 和水平渗透系数 为常数。然而，固结过程中的 和 均随孔隙比 的减小而呈非线性变化。在Hansbo理论基础上，引入普遍压缩方程和普遍渗透性变化方程来分别表示正常固结土的 - 和 - 的非线性变化关系，得到砂井地基非线性径向固结解，并与前者进行对比分析，探讨了非线性固结参数 和加荷比 对固结过程的影响。结果表明： 和 是控制砂井地基非线性径向固结过程的两个重要因素。

Non-linear radial consolidation of sand-drained ground with varying volume compressibility and horizontal permeability

The conventional radial consolidation theory is based on the small strain theory, so a constant volume compressibility and a constant coefficient of horizontal permeability are assumed during the consolidation process. However, both the non-linear variations of and are as a result of reduction in void ratio during the consolidation process. The non-linear relations of - and - for normally consolidated clays can be represented by the general compressibility equation and permeability change equation, respectively. Based on Hansbo’s theory, the solution of non-linear radial consolidation of sand-drained ground is deduced and compared with Hansbo’s solution. Finally, the influence of non-linear consolidation parameter and preloading increment ratio ( ) on the consolidation process is discussed. The results show that and are two important factors which control the non-linear radial consolidation of sand-drained ground.