| 土工格栅与砂土的细观界面特性研究 |
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| 引用本文： | 陈建峰,李辉利,柳军修,周健.土工格栅与砂土的细观界面特性研究[J].岩土力学,2011,32(Z1):66-71. |
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| 作者姓名： | 陈建峰 李辉利 柳军修 周健 |
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| 作者单位： | 同济大学岩土及地下工程教育部重点实验室;上海市地质调查研究院; |
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| 基金项目： | 国家自然科学基金资助项目(No.50508030,No.41072200); 上海市重点学科建设项目资助(No.B308) |
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| 摘 要： | 对大尺寸土工格栅筋土拉拔试验进行颗粒流数值模拟,从细观角度研究了筋土界面特性。分析结果表明,利用颗粒流理论及程序中的"clump"方法开发的类三角形砂土颗粒与实际砂土颗粒性状较一致;拉拔过程中筋土上下界面并不对称,下界面扰动范围比上界面大;在砂土密实度及法向应力较低情况下,筋土界面厚度随法向应力的增大而减小,两者呈一负相关的线性关系。
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| 关 键 词： | 土工格栅 界面特性 颗粒流 拉拔试验 |
| 收稿时间： | 2010-08-14 |
Mesoscopic study of interface properties of geogrid-reinforced soil |
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| CHEN Jian-feng,LI Hui-li,LIU Jun-xiu,ZHOU Jian.Mesoscopic study of interface properties of geogrid-reinforced soil[J].Rock and Soil Mechanics,2011,32(Z1):66-71. |
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| Authors: | CHEN Jian-feng LI Hui-li LIU Jun-xiu ZHOU Jian |
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| Institution: | 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China； 2. Shanghai Institute of Geological Survey, Shanghai 200072, China |
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| Abstract: | A large-size reinforced soil pull-out test was carried out and was simulated by particle flow code(PFC) to investigate the microscopic properties of geogrid-soil interface.The results show that the behavior of trigonometric group particles developed based on clump inherent in PFC is close to that of practical sand particles.The upper and lower geogrid-soil interfaces are not symmetrical such that the disturbed area of lower interface is higher than that of upper interface.Under the condition of low compactn... |
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| Keywords: | geogrid interface properties particle flow code pull-out test |
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