| 砂土宏观力学特性与细观结构的相关性试验研究 |
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| 引用本文： | 刘文白,徐海侠. 砂土宏观力学特性与细观结构的相关性试验研究[J]. 武汉理工大学学报(交通科学与工程版), 2011, 0(4) |
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| 作者姓名： | 刘文白 徐海侠 |
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| 作者单位： | 上海海事大学海洋环境与工程学院;同济大学水利工程系; |
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| 基金项目： | 国家自然科学基金项目(批准号:51078228,50909057); 上海市教育委员会科研项目(批准号:07ZZ99); 上海海海事大学校级重点学科建设项目(批准号:A290209002); 上海市第四期本科教育高地建设项目(批准号:B210008G)资助 |
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| 摘 要： | 通过无标点变形量测系统分析桩周土变形场,确定剪切破坏区和显微细观观测点.应用MiVnt系统分析加荷过程中土细观参数变化,细观参数(1+e)/e3、颗粒偏心度与基础位移的相关性最强;随荷载增大,1#,2#点孔隙比下降呈负相关关系,引起剪缩特征,3#点呈正相关关系而剪胀应力松弛;1,2,3#点颗粒定向性均增高呈正相关性,表明颗粒分布有序性减弱,土体具有非稳定性的承载形式.
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| 关 键 词： | 砂土 半模试验 变形场 细观力学 宏细观方法 |
Experiment Analysis of Relevance of Macro-Mechanics Characteristic and Meso-Structure on Sandy Soil |
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| Liu Wenbai) Xu Haixia))). Experiment Analysis of Relevance of Macro-Mechanics Characteristic and Meso-Structure on Sandy Soil[J]. journal of wuhan university of technology(transportation science&engineering), 2011, 0(4) |
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| Authors: | Liu Wenbai) Xu Haixia))) |
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| Affiliation: | Liu Wenbai1) Xu Haixia2)(College of Ocean Envionment and Engineering,Shanghai Maritime University,Shanghai 201036,China)1)(Depart.of Water-conservancy Engineering,Tongji University,Shanghai 200092,China)2) |
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| Abstract: | Through non-marking points digital photogrammetry of deformation measurement system,the biggest shearing strain,volumetric strain and displacement vector distribution of pile the surrounding soil on experiments of half-cut model were analysed to determine the shearing failure area and meso-observation point.The applied MiVnt image analysis system has processed the meso-observation images of soil structure,has sum up and analysed the change of meso-parameters(numbers of particles,total area of particles,voil... |
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| Keywords: | sand half-cut model test deformation meso-mechanics methods of macro-and meso-mechanical properties correlation |
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