| 饱和砂土地震液化后地面大位移特性研究 |
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| 引用本文： | 周云东,袁印龙,王志华. 饱和砂土地震液化后地面大位移特性研究[J]. 防灾减灾工程学报, 2012, 0(6): 720-724 |
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| 作者姓名： | 周云东 袁印龙 王志华 |
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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;河海大学岩土工程科学研究所;南京六合新区建设发展有限公司;南京工业大学城市地下空间研究中心 |
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| 基金项目： | 国家自然科学基金项目(59809004/50808067)资助 |
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| 摘 要： | 地震引起的地基液化常会造成地基大的侧向变形而导致灾难性的破坏,饱水砂土液化后的变形特性是地震液化大位移研究的基础。通过全自动多功能三轴仪的空心样动加载液化后的静扭剪试验,对饱水砂土液化后大变形特性进行了试验研究。结果表明,与常规静加载特性不同,饱水砂土液化后静加载时表现出单调剪胀的特性,加载初始阶段孔压基本不变,应变达到一定幅度后孔压一直减小,液化后变形曲线可分为低强度段和强度恢复段。低强度段模量近乎为零,强度恢复段试样强度不断增长。低强度段是液化后大变形发生的主要阶段。
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| 关 键 词： | 饱水砂土 地震液化 地面大变形 试验研究 |
Study on Large Ground Displacement of Saturated Sand Induced by Earthquake Liquefaction |
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| ZHOU Yun-dong,YUAN Yin-long,WANG Zhi-hua. Study on Large Ground Displacement of Saturated Sand Induced by Earthquake Liquefaction[J]. Journal of Disaster Prevention and Mitigation Engineering, 2012, 0(6): 720-724 |
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| Authors: | ZHOU Yun-dong YUAN Yin-long WANG Zhi-hua |
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| Affiliation: | 1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;2.Geotechnical Research Institute,Hohai University,Nanjing 210098,China;3.Nanjing Luhe New District Construction & Development Limited Company,Nanjing 211500,China;4.Research Center of Urban Underground Space,Nanjing University of Technology,Nanjing 210009,China) |
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| Abstract: | Great disasters will be caused by large lateral deformation induced by earthquake liquefaction.The behavior of saturated sand after liquefaction is the basis of the research on earthquake-induced large deformation.Static torsion shear tests of hollow sample on post liquefaction of sand are performed.Test results show that the EPP always falls during static loading and the sand has the property of dilatation after liquefaction.The deformation curves can be divided into two sections,low strength segment and strength recovery segment.The modulus of low strength segment is approximate zero and it increases in the strength recovery segment.Large lateral deformation after liquefaction mainly occurred in the low strength segment. |
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| Keywords: | saturated sand earthquake liquefaction large ground displacement laboratory research |
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