中文摘要：

为了研究路基压实土的流变性质,利用改造的实验装置对3种路基压实土分别进行传统直剪、固结实验以及固结蠕变和剪切固结耦合蠕变实验,得到其基本力学性质和蠕变实验数据。借助这些实验数据,基于分数阶微积分理论和Mittag-Leffler函数建立压实土的三参数类Maxwell流变本构模型,通过引入Deborah数、采用含权值的面积判定函数以及逐点搜索的方式,实现该本构模型参数的自动辨识。结果表明建立的流变本构模型具有参数少、且能较好地吻合流变实验数据的优点,具有很好的应用价值。

英文摘要：

To study the rheological properties of subgrade compacted soil,three kinds of subgrade compacted soil？s traditional direct-shear and consolidation experiments as well as consolidation creep and shear-consolidation coupled creep experiments were carried out respectively by using improving experimental devices.Their basic mechanical properties and creep experimental data were obtained.Using these experimental data,similar Maxwell rheological constitutive model of subgrade compacted soil was set up with three parameters,which was based on fractional calculus theory and Mittag-Leffler function;and its parameter was realized to automatic identification by introducing Deborah number,adopting area determinant function with weight and the manner of point-by-point searching.The results show that the established rheological constitutive model with a few of parameters fits the experimental data with accuracy;so it has a good application value.