| 饱和砂土地震液化大位移机理研究 |
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| 引用本文： | 周云东,朱德胜.饱和砂土地震液化大位移机理研究[J].水利与建筑工程学报,2011,9(4):1-4,49. |
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| 作者姓名： | 周云东 朱德胜 |
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| 作者单位： | 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京,210098 |
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| 基金项目： | 国家自然科学基金资助项目，中央高校基本科研业务费资助 |
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| 摘 要： | 饱水砂土地震液化大位移会对土工构筑物造成严重的危害,对其机理的把握是大位移预测的前提和基础。本文对饱水砂土进行了振动液化后的静扭剪及再固结试验,结果表明液化后静加载曲线可分为两段：低强度段、强度恢复段;低强度段的模量极低,在较小的剪应力作用下应变即迅速增长,强度恢复段试样的强度则逐步得到恢复。由液化后静加载应力应变曲线...
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| 关 键 词： | 饱水砂土 地震液化 大变形 机理 |
Research on Mechanism of Large Displacement of Saturated Sand Induced by Earthquake Liquefaction |
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| ZHOU Yun-dong,ZHU De-sheng.Research on Mechanism of Large Displacement of Saturated Sand Induced by Earthquake Liquefaction[J].Journal of Water Resources Architectural Engineering,2011,9(4):1-4,49. |
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| Authors: | ZHOU Yun-dong ZHU De-sheng |
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| Affiliation: | 1,2(1.Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education,Hohai University,Nanjing,Jiangsu 210098,China;2.Geotechnical Engineering Research Institute,Hohai University,Nanjing,Jiangsu 210098,China) |
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| Abstract: | The serious damages to geotechnical structures can be caused by the large displacement induced by earthquake liquefaction.The mechanism is the basis of prediction about earthquake-induced large deformation.Here,the laboratory tests are conducted to research the behavior of saturated sand after liquefaction.Test results show that the deformation curves could be divided into two sections,e.g.,low strength segment and strength recovery segment.Then the mechanism of large deformation after liquefaction is discussed based on the test results.It is pointed out from the discussion that the ＂surplus water＂ induced by vibration is the main reason of earthquake-induced large deformation. |
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| Keywords: | saturated sand earthquake liquefaction large displacement mechanism |
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