| 土石混合料剪切面分形特征试验研究 |
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| 引用本文： | 董云,柴贺军.土石混合料剪切面分形特征试验研究[J].岩土力学,2007,28(5):1015-1020. |
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| 作者姓名： | 董云 柴贺军 |
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| 作者单位： | 1. 淮阴工学院,建筑工程系,江苏,淮安,223001;河海大学,岩土工程科学研究所,南京,210097
2. 重庆交通科研设计院,重庆,400067 |
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| 基金项目： | 交通部西部交通建设科技项目;江苏省淮安市科技计划;河海大学校科研和教改项目 |
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| 摘 要： | 土石混合料因具有良好的工程特性而被广泛应用于道路、堤坝等工程，填筑体受力后往往沿薄弱面发生剪切破￡混合料的抗剪强度成为稳定和变形分析的重要力学指标。由于土石混合料物质组成的复杂性、结构分布的不规律性及采柠困难性，且受检测仪器的限制，确定其强度指标较为困难。应用改进的直剪试验仪进行了不同类别、不同最大粒径土石福料的室内大型直剪试验，在获得强度指标同时，再现剪切面的实际情况，量测剪切面的起伏特征。根据分形几何学原理，切面具有良好的分形特征，应用三角形棱柱表面积覆盖法编程计算了剪切面的分形维数。初步建立了剪切面分形维数与福料杭萌强度之间的关系，用来快速预测土石混合料的强度指标。
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| 关 键 词： | 土石混合料 直剪试验 剪切面 分形维数 抗剪强度 |
| 文章编号： | 1000-7598-（2007）05-1015-06 |
| 收稿时间： | 2005-06-06 |
| 修稿时间： | 2005-06-06 |
Experimental study on fractal character of shear surface of rock-soil aggregate mixture |
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| DONG Yun,CHAI He-jun.Experimental study on fractal character of shear surface of rock-soil aggregate mixture[J].Rock and Soil Mechanics,2007,28(5):1015-1020. |
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| Authors: | DONG Yun CHAI He-jun |
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| Institution: | 1. Department of Civil Engineering, Huaiyin Institute of Technology, Huaian 223001, China; 2. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210097, China; 3. Chongqing Communications Research and Design Institute, Chongqing 400067, China |
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| Abstract: | Rock-soil aggregate mixture is broadly used in roadbed, dykes and dams for its favorable engineering properties. Shear strength of the mixture becomes the most important mechanical index for stabilization and deformation analysis because it always occurrs shear failure along the weakness surface in filler. However, it is difficult to determine the shear strength for the complexity composition, non-regularity frame distributing of the mixture, and restriction of current measure instrument. This study carried out shear test on different kinds’ and different dmax rock-soil aggregate mixtures by using the improved shear test instrument, determined the intensity of the mixture conveniently; meanwhile, reappeared the actual shear surface; and further more, directly measured the gurgitation data of the surface. According to the principle of fractal geometry, the surface has well fractal property; the gurgitation data was used to calculate the fractal dimension of the shear surface by program that based on cover method of triangle prism superficial area. Finally, the relationship, between shear strength of the mixture and the fractal dimension of shear surface, is established so as to forecast the strength of the mixture quickly. |
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| Keywords: | rock-soil aggregate mixture shear test shear surface fractal dimension shearing strength |
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