| 含水率对重塑黄土的变形特性影响的实验研究 |
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| 引用本文： | 杨坪,吴民晖,许德鲜.含水率对重塑黄土的变形特性影响的实验研究[J].工程地质学报(英文版),2015,23(6):1066-1071. |
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| 作者姓名： | 杨坪 吴民晖 许德鲜 |
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| 作者单位： | 1.同济大学岩土及地下工程教育部重点实验室 上海 200092; |
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| 基金项目： | 国家自然科学基金项目(资助号:41002093),上海市自然科学基金项目(No.14ZR1442800),地质灾害防治与地质环境保护国家重点实验室开放基金项目(No.SKLGP2014K013),上海市重点学科建设项目(资助号:B308),同济大学青年优秀人才培养计划资助 |
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| 摘 要： | 采用侧限压缩实验,对相同干密度、不同含水率的重塑黄土进行压缩固结实验。借鉴原状黄土湿陷性的研究方法,分析了含水率对于重塑黄土的变形影响。结果表明:低含水率时,孔隙比随应力的变化近似为线性、割线模量随应力的变化表现明显的非线性、应变速率衰减得快;高含水率时,孔隙比随应力的变化表现为明显的非线性、割线模量随应力的变化近似为线性、应变速率衰减得慢。
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| 关 键 词： | 重塑黄土 含水率 割线模量 孔隙比 |
| 收稿时间： | 2014-10-24 |
LABORATORY TEST ON EFFECT OF MOISTURE CONTENT ON DEFORMATION CHARACTERISTICS OF REMOLDED LOESS |
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| Institution: | 1.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092;2.Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092;3.Northwest Research Institute of Engineering Investigations and Design, Xi'an 710003 |
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| Abstract: | The remolded loess with same dry density and different moisture contents are tested with confined compression test. Based on research methods of undisturbed loess collapsibility, effect of moisture content on deformation characteristics of the remolded loess is analyzed. The test results show that under low moisture content, the relationship between void ratio and stress is approximately linear. The relationship between secant modulus and stress is significant nonlinear. The strain velocity decays very rapid. Under high moisture content, the relationship between void ratio and stress is significantly nonlinear. The relationship between secant modulus and stress is approximately linear and the strain velocity decays slowly. |
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