| 残余状态下粉砂流变性的三轴试验研究 |
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| 引用本文： | 邓检良,许强.残余状态下粉砂流变性的三轴试验研究[J].工程地质学报(英文版),2015,23(4):660-667. |
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| 作者姓名： | 邓检良 许强 |
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| 作者单位： | 1.上海交通大学船舶海洋与建筑工程学院 上海 200240; |
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| 基金项目： | 高等学校博士学科点专项科研基金新教师类(20120073120020), 地质灾害防治与地质环境保护国家重点实验室开放基金(SKLGP2013K022)资助 |
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| 摘 要： | 采用现场采集的土样, 实施恒定位移速率的三轴试验, 分析了风干条件下粉砂的流变性。主要研究成果包括: (1)采用速率敏感系数量化分析了速率效应, 即位移速率加大强度增加的现象。(2)着重研究了残余状态下的特殊流变性, 即位移速率效应引起的应力跳跃随着位移的增加而部分消失的现象, 并通过速率敏感系数进行了量化分析。(3)通过讨论速率效应和应力松弛现象, 分析了流变性对该土样残余强度的影响。
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| 关 键 词： | 恒定应变速率 三轴试验 速率效应 速率敏感系数 残余强度 |
| 收稿时间： | 2015-04-30 |
TRIAXIAL COMPRESSION TESTS FOR EFFECTS OF VISCOUS PROPERTY ON RESIDUAL STRENGTH OF FINE SAND |
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| Institution: | 1.School of Naval Architecture, Ocean, and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240;2.State Key Laboratory of Geohazard Prevention & Geoenvironment ProtectionSKLGP, Chengdu University of Technology, Chengdu 610045 |
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| Abstract: | Triaxial compression tests with constant-strain-rate are performed on samples retrieved from a slope with slow movement experience. The viscous properties of the fine sand under air-dried condition are observed. The results include: (1)The rate effect, showing by the increase in strength with strain rate, is quantified by rate sensitivity coefficient. (2)The research focuses on the viscous properties at residual state, which shown by partially decay of stress jump induced by a sudden change of strain rate with the increase in displacement. The decay is quantified by using the rate sensitivity coefficient. (3)The effect of viscous property on the residual strength is shown by the rate effect and relaxation. |
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