摘要
低掺量水泥改良土在路基填料中的应用日益广泛,通过低掺量水泥改良后的粘性土的动三轴试验分析研究,研究了水泥土动强度、变形特性和振动液化性能及其影响因素,通过试验应力-应变分析,得出了Hardin-Drnevich动力本构模型实验参数.实验研究还表明应力水平对动应力应变具有显著影响;水泥改良土低掺量配比设计中,试验研究结果表明在3.0%～5.0%之间存在一个合理低掺量;水泥改善了土体的抗振动液化性能,围压σ3c=200kPa时,3.0%和5.0%掺量的水泥土动态孔隙水压力发生的临界应变值分别为3.3×10-2和5.4×10-2.图11,表7,参22.
The triaxial dynamic tests of the low cement continent improved silty clay were carried out, and the dynamic strength, dynamic deformation and the vibration liquefaction properties of this improved soil were also analyzed. The Parameters of the Hardin-Dmevich constitutive model are obtained, and the feasibility that the low cement continent improved soil is used as the embankment fills is testified. The resnifs show that there exists a proper cement content percentage between the 3.0% and 5.0%, that the Hardln-Drnevich model can well describe the cement improved soll relationship between dynamic stress and dynamic strain, and that there also exists a limit shear strain above which the excess pore water pressure develops, in the 200kPa confining stress, limit shear strain are 3.3 e 10^-2 and 5.4 e 10^-2 for the 3.0% and 5.0% cement improved soil respectively. 1 lfigs., 7tebs., 22refs.
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2007年第2期52-56,共5页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
湖南省交通科技项目(200413)
