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循环荷载作用下富水砂质泥岩动变形特性试验研究

丁祖德, 彭立敏, 施成华, 罗 晶, 杨伟超

丁祖德, 彭立敏, 施成华, 罗 晶, 杨伟超. 循环荷载作用下富水砂质泥岩动变形特性试验研究[J]. 岩土工程学报, 2012, 34(3): 534-539.
引用本文: 丁祖德, 彭立敏, 施成华, 罗 晶, 杨伟超. 循环荷载作用下富水砂质泥岩动变形特性试验研究[J]. 岩土工程学报, 2012, 34(3): 534-539.
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DING Zu-de, PENG Li-min, SHI Cheng-hua, LUO Jing, YANG Wei-chao. Experimental study on dynamic deformation behaviors of water-rich sandy mudstone under cyclic loading[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(3): 534-539.
Citation: DING Zu-de, PENG Li-min, SHI Cheng-hua, LUO Jing, YANG Wei-chao. Experimental study on dynamic deformation behaviors of water-rich sandy mudstone under cyclic loading[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(3): 534-539.
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循环荷载作用下富水砂质泥岩动变形特性试验研究  English Version

  • 1. 中南大学土木建筑学院，湖南 长沙 410075; 2. 高速铁路建造技术国家工程实验室，湖南 长沙 410075

基金项目: 国家重点基础研究发展计划项目(2011CB013802)； 国家自然科学基金项目(50808176)；铁道部科技研究开发计划课题项目(2008G031-17)；湖南省高校创新平台开放基金项目(10K075)
详细信息
    作者简介:

    丁祖德 (1979 – ) ，男，湖南常德人，博士研究生，从事隧道与地下工程方面的科研工作。

  • 中图分类号: TU41

Experimental study on dynamic deformation behaviors of water-rich sandy mudstone under cyclic loading

  • 1. School of Civil Engineering and Architecture, Central South University, Changsha 410075, China; 2. National Engineering Laboratory of High Speed Railway Construction, Changsha 410075, China

摘要

    摘要
  • 摘要: 通过富水砂质泥岩循环三轴试验，对循环荷载作用下砂质泥岩的动应变发展规律进行了研究，重点分析了动应力水平、静偏应力大小以及振动频率对动应变的影响。结果表明：富水砂质泥岩在循环荷载作用下的不可逆应变累积过程表现为稳定型和破坏型两种典型情况。对于稳定型发展曲线，变形发展表现为初始阶段和稳定阶段，初始阶段的累积变形约占总变形量的 40% ～ 50% ，但所占比重随着应力水平的提高逐渐减小；对于破坏型发展曲线，变形发展表现为初始阶段、稳定阶段和加速阶段的三阶段变形演化规律。岩样的累积塑性变形随动应力和静偏应力的提高而增大，随振动频率的增大而减小，而且动应力和静偏应力越大，变化趋势越明显。富水砂质泥岩的临界动应力值与其岩性、应力水平、振动频率等密切相关。
    Abstract: Through the dynamic triaxial tests on water-rich sandy mudstone, the dynamic strain analysis is made on the water-rich sandy mudstone under cyclic loading, and the influences of dynamic stress, static deviator stress and vibration frequency are analyzed emphatically. The results show that there are two types of cumulative irreversible deformation of water-rich sandy mudstone under cyclic loading, i.e. stable type and destructive type. The development of deformation can be divided into the initial and the stable stages for the stable development curve, and the cumulative deformation during initial stage is of the total deformation of 40% to 50%, but the proportion decreases with the increase of stress level. For the destructive development curve, there are three stages: the initial deformation stage, the constant deformation stage and the accelerative deformation stage. The cumulative plastic deformation of the sandy mudstone grows with the increase of the dynamic stress and static deviator stress and reduces with the increase of the vibration frequency, especially at a higher dynamic stress, higher static deviator stress or less frequency. There is a critical dynamic stress under cyclic loading, which depends on rock property, stress level and vibration frequency.
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    • 参考文献(13)
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出版历程
  • 收稿日期:  2011-05-29
  • 发布日期:  2012-03-29

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