| 循环荷载下压实粉土的动态特性 |
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| 引用本文： | 关彦斌,肖军华,陈建国.循环荷载下压实粉土的动态特性[J].交通运输工程学报,2009,9(2). |
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| 作者姓名： | 关彦斌 肖军华 陈建国 |
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| 作者单位： | 关彦斌,GUAN Yan-bin(北京工业大学,建筑工程学院,北京,100022);肖军华,XIAO Jun-hua(南京工业大学,土木工程学院,江苏,南京,210009);陈建国,CHEN Jian-guo(石家庄铁道学院,土木工程分院,河北,石家庄,050043)
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| 基金项目： | 铁道部科技研究开发计划项目 |
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| 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.
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| 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 |
Dynamic characters of compacted silt under cyclic load |
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| GUAN Yan-bin,XIAO Jun-hua,CHEN Jian-guo.Dynamic characters of compacted silt under cyclic load[J].Journal of Traffic and Transportation Engineering,2009,9(2). |
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| Authors: | GUAN Yan-bin XIAO Jun-hua CHEN Jian-guo |
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| Affiliation: | 1.School of Architecture and Civil Engineering;Beijing University of Technology;Beijing 100022;China;2.School of Civil Engineering;Nanjing University of Technology;Nanjing 210009;Jiangsu;3.School of Civil Engineering;Shijiazhuang Railway Institute;Shijiazhuang 050043;Hebei;China |
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| Abstract: | 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 ... |
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| Keywords: | railway engineering silt dynamic triaxial test cumulative deformation resilient modulus critical dynamic stress |
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