路基黏土改良填料的动剪应变门槛研究

发布时间：2018-05-09 10:02

本文选题：路基 + 黏土改良填料　；参考：《公路工程》2017年01期

【摘要】：土体的动剪应变幅值是分析土体动力特性的关键参数,针对掺砂、砾的路基黏土改良填料,进行了一系列不同围压、动偏应力、压实度、含水率条件下的大型动三轴试验,探讨了改良填料累积塑性应变的增长特点和类型,分析了动剪应变与累积塑性应变增长的内在联系,最终得出了区分累积塑性应变增长类型的动剪应变门槛,由此可以利用土体所表现出的动剪应变值判断其动力稳定性。
[Abstract]:The amplitude of dynamic shear strain of soil is the key parameter to analyze the dynamic characteristics of soil. A series of large-scale dynamic triaxial tests under different confining pressure, dynamic deflection stress, compactness and moisture content are carried out for the improved filling material of embankment clay mixed with sand and gravel. The growth characteristics and types of cumulative plastic strain of modified fillers are discussed. The internal relationship between dynamic shear strain and cumulative plastic strain growth is analyzed. Finally, the threshold of dynamic shear strain to distinguish the growth type of cumulative plastic strain is obtained. Therefore, the dynamic stability of the soil can be judged by the dynamic shear strain.
【作者单位】：湖南省大岳高速公路建设开发有限公司;湖南省交通科学研究院;
【基金】：交通运输部建设科技项目(2014318785090) 湖南省交通科技项目(200926)
【分类号】：U416.1

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