摘要
为了研究交通循环荷载下黄河冲积粉土的动态特性,基于室内应力控制式动三轴试验,并考虑动应力、含水率两个因素的变化,研究了压实粉土的累积塑性变形、回弹模量及临界动应力的变化规律。试验结果表明:循环荷载下压实粉土的累积变形与动应力、含水率的高低均有关,动应力越大,累积变形随含水率增加而增长较快;压实粉土的回弹模量随动应力增加而缓慢降低,随含水率增加线性减小;压实粉土的临界动应力随含水率增加线性降低。
In order to investigate the dynamic characters of compacted silt under cyclic load, the variations of its dynamic stress and water content were considered. The cumulative plastic deformation, resilient modulus and critical dynamic stress of compacted silt were studied based on stress-controlled dynamic triaxial test in laboratory. Test result shows that the cumulative deformation of compacted silt is closely related with its dynamic stress and water content. The higher its dynamic stress is, the faster the growth speed of its cumulative deformation with the increase of its water content is. The resilient modulus of compacted silt decreases gradually with the increase of its dynamic stress, and decreases linearly with the increase of its water content. Its critical dynamic stress of compacted silt also decreases linearly with the increase of its water content. 2 tabs, 5 figs, 18 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2009年第2期28-31,共4页
Journal of Traffic and Transportation Engineering
基金
铁道部科技研究开发计划项目(2005G012)
关键词
铁道工程
粉土
动三轴试验
累积变形
回弹模量
临界动应力
railway engineering
silt
dynamic triaxial test
cumulative deformation
resilient modulus
critical dynamic stress
