为研究纳米Mg O外加剂对水泥土的改性效果,进行了不同掺入比的纳米Mg O改性水泥土(Nm CS)的室内一维固结压缩试验。试验设计了3个养护龄期和4个纳米氧化镁掺入比,考虑了非饱和与饱和两种状态。实验结果表明:(1)同一龄期下,Nm CS的压缩量基本随纳米Mg O掺入量的增加而减小,1.25%掺量较0.00%掺量的最大减小量为42.6%;(2)同一纳米Mg O掺入量下,Nm CS的压缩量基本随龄期的增长而减小,90 d龄期较28龄期最大的减小量为48.1%;(3)中前期及纳米材料配比适当的后期,Nm CS在饱和状态下的压缩量较非饱和状态下的更小,最大减小量为31.5%。 In order to study the modification effect of nano-MgO admixture on cement soil, one-dimensional consolidation compression experiments of nano-MgO modified cement soil (Nm CS) with different incorporation ratios were conducted. Three curing ages and four nano-magnesia incorporation ratios were designed and tested. Two states, unsaturated and saturated, were considered. The experimental results show that: (1) Under the same age, the compression of Nm CS decreases with the increase of nano-MgO content, and the maximum decrease of 1.25% 2) Under the same nano-MgO incorporation, the compression amount of Nm CS decreases with the increase of age, and the largest decrease of the Nm CS is 48.1% at the age of 90 d. (3) In the late stage of material proportioning, the compression of Nm CS in the saturated state is smaller than that in the non-saturated state, the maximum reduction is 31.5%.