| 黄泛区粉砂土动强度与抗液化强度试验研究 |
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| 引用本文： | 董正方,王仁辉,曹献伟,张群生.黄泛区粉砂土动强度与抗液化强度试验研究[J].西北地震学报,2021,43(1):162-168,186. |
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| 作者姓名： | 董正方 王仁辉 曹献伟 张群生 |
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| 作者单位： | 河南大学 岩土与轨道交通工程研究所, 河南 开封 475004;河南大学 河南省轨道交通智能建造工程技术中心, 河南 开封 475004 |
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| 基金项目： | 国家自然科学基金项目（51408195，51608174）；河南省高等学校重点科研项目资助计划（19A560008）；河南省高等学校青年骨干教师培养计划（2018GGJS018）；河南省科技攻关计划（192102310279）；开封市科技发展计划项目（1603110） |
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| 摘 要： | 因黄泛区粉砂土与其他地区有较大区别,对其动强度和抗液化强度的研究相对较少。对开封地区粉砂土的动强度和抗液化强度进行研究,选定围压、干密度、细粒含量作为影响因素,通过动三轴试验得到其动强度曲线和抗液化强度曲线,分别分析三个影响因素对黄泛区粉砂土动强度和抗液化强度的影响。结果表明:黄泛区粉砂土的动强度和抗液化强度随围压和干密度的增加而增大,随动荷载振动次数的增加而减小,随细粒含量的增加出现先降低后提高的现象,且其抗液化强度比动强度大。
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| 关 键 词： | 岩土动力学 粉砂土 动三轴试验 动强度 抗液化强度 |
| 收稿时间： | 2019/8/22 0:00:00 |
Experimental Study of Dynamic and Anti-Liquefaction Strengths of Silty Sand in Yellow River Flood Area |
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| DONG Zhengfang,WANG Renhui,CAO Xianwei,ZHANG Qunsheng.Experimental Study of Dynamic and Anti-Liquefaction Strengths of Silty Sand in Yellow River Flood Area[J].Northwestern Seismological Journal,2021,43(1):162-168,186. |
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| Authors: | DONG Zhengfang WANG Renhui CAO Xianwei ZHANG Qunsheng |
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| Institution: | Institute of Geotechnical and Rail Transport Engineering, Henan University, Kaifeng 475004, Henan, China;Henan Provincial Research Center of Engineering on Intelligent Constructionof Rail Transit, Henan University, Kaifeng 475004, Henan, China |
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| Abstract: | The silty sand in the Yellow River flood area differs from that in other areas. In this study, we investigated the dynamic and anti-liquefaction strengths of silty sand in the Kaifeng area and identified three influence factors:the confining pressure, dry density, and fines content. Based on the results of a dynamic triaxial test, we obtained the dynamic strength and anti-liquefaction strength curves of silty sand in the Yellow River flood area and considered the effects of these three influence factors. The experimental results indicated that the dynamic and anti-liquefaction strengths of silty sand in the Yellow River flood area increase with increases in the confining pressure and dry density, decrease with increases in the vibration time of the dynamic load, and first decrease and then increase with increases in the fines content. The anti-liquefaction strength of the silty sand was determined to be greater than its dynamic strength in this area. |
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| Keywords: | geotechnical dynamics silty sand dynamic triaxial test dynamic strength anti-liquefaction strength |
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