饱和砂土液化后再固结体变特性研究

Reconsolidation volumetric behavior of saturated sand soil after liquefaction

通过对饱水砂土动加载后的再固结体变特性试验研究,发现动加载后的再固结体变不仅与动加载引起的超孔隙水压力、动加载引起的土体最大剪应变有较好的相关性,而且试样的初始有效固结压力对它也有较大的影响.基于试验结果提出了一个可考虑围压影响的再固结体变计算公式.

An experimental study on the reconsolidation volumetric behavior of saturated sand soil after dynamic loading shows that good correlativity exists between the reconsolidation volumetric strain, the excess pore water pressure, and the maximal shear strain induced by dynamic loading, and that the initial effective consolidation pressure has a great effect on the reconsolidation volumetric strain. Based on the experimental results, a calculating formula is proposed for the reconsolidation volumetric strain, which takes the effect of confining pressure into account.