| 循环荷载特征对筋土界面剪切特性的影响试验 |
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| 引用本文： | 徐超,石志龙.循环荷载特征对筋土界面剪切特性的影响试验[J].中国公路学报,2011(3). |
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| 作者姓名： | 徐超 石志龙 |
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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;同济大学地下建筑与工程系; |
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| 基金项目： | 国家自然科学基金项目(50878154); 上海市重点学科建设项目(B308) |
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| 摘 要： | 采用大型结构面剪切仪进行了循环荷载作用下土工格栅与砂土的直剪试验,研究了法向循环荷载特征对土工格栅与石英砂界面剪切特性的影响。循环荷载的波形取余弦波、三角波、方形波3种,频率分别为0.01、0.05、0.1、0.5 Hz,振幅选择25、50、75、100 kPa四种。分析结果表明:法向循环荷载波形控制了剪应力的变化规律,但对界面的峰值剪应力影响不大;频率和振幅对界面剪应力有显著的影响,峰值剪应力随频率的增大而减小,随振幅的增大而增大;频率和振幅对砂土体积应变的影响明显,随着频率和振幅的增加,石英砂的体积应变由剪胀向剪缩过渡。
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| 关 键 词： | 道路工程 筋土界面 直剪试验 循环荷载 土工格栅 石英砂 |
Experiment of Influence of Cyclic Load Characteristics on Shear Properties of Geogrid-soil Interface |
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| XU Chao,SHI Zhi-long.Experiment of Influence of Cyclic Load Characteristics on Shear Properties of Geogrid-soil Interface[J].China Journal of Highway and Transport,2011(3). |
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| Authors: | XU Chao SHI Zhi-long |
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| Institution: | XU Chao1,2,SHI Zhi-long1,2(1.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China,2.Department of Geotechnical Engineering,China) |
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| Abstract: | Using large-scale interfacial shear apparatus,a series of direct shear tests between geogrid and sand were performed under cyclic load.The influence of normal cyclic load characteristic on shear property of geogrid-quartz sand interface was studied.Cyclic load waveforms were cosine wave,triangle wave,square wave,the frequencies were 0.01,0.05,0.1,0.5 Hz respectively,and amplitudes were 25,50,75,100 kPa in the tests.The test results show that the variational rule of the interface shear stress is controlled b... |
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| Keywords: | road engineering geogrid-soil interface direct shear test cyclic load geogrid quartz sand |
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