中文摘要：

为了研究不同浸泡环境对改良粉土强度的影响规律,以无侧限抗压强度为评判指标,将改良粉土试样置于淡水和盐溶液两种溶液环境下,分析历经不同的浸泡时间后其强度的变化规律.对不同初始含水率和掺灰比的改良粉土进行了室内直剪试验及压缩试验,探讨初始含水率和掺灰比对改良粉土的抗剪强度及压缩性能的影响规律.结果表明,石灰改良土在不同浸泡环境下,其强度的衰减幅度保持一致,且强度损失均超过90％;对于水泥改良土,浸泡时间越长,其强度衰减程度越大,浸泡10 d后强度幅度达衰减50％.改良粉土的强度仍然对水十分敏感,但随着掺灰比的增加,其敏感程度有所下降.

英文摘要：

To study the influence law of strength of improved silt in different immersion environments,with un- confined compressive strength as the evaluation index, improved silt samples are soaked for different days in two im- mersion environments of fresh water and saline solution. Then, the analysis of the strength change law is carried on. The direct shear test and compression test are conducted with improved silt of different initial water content and ash- mixing ratio and explore its effect of shear strength and compressive property. The results show that, for lime im- proved silts, different immersion environments make coincident on strength retrogression and strength retrogression has at least 90% ;For cement improved silt, the longer of soaking time, the strength retrogression is more. The strength retrogression is 50%, and is tending towards stability soaked for 10 days. The water stability of the im- proved silt is still very sensitive, but there is a significant negative correlation between he ash-mixing ratio and the sensitivity.