| 土体渗透变形及渗透破坏过程中分形特征初探 |
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| 引用本文： | 段祥宝,刘运化,杨超,王峰,谢罗峰,远艳鑫.土体渗透变形及渗透破坏过程中分形特征初探[J].水电能源科学,2013,31(7):100-103,214. |
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| 作者姓名： | 段祥宝 刘运化 杨超 王峰 谢罗峰 远艳鑫 |
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| 作者单位： | 南京水利科学研究院 水文水资源及水利工程科学国家重点试验室, 江苏 南京 210029;金华市港航管理处， 浙江 金华 321017;南京水利科学研究院 水文水资源及水利工程科学国家重点试验室, 江苏 南京 210029;金华市港航管理处， 浙江 金华 321017;南京水利科学研究院 水文水资源及水利工程科学国家重点试验室, 江苏 南京 210029;南京水利科学研究院 水文水资源及水利工程科学国家重点试验室, 江苏 南京 210029 |
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| 基金项目： | 浙江省交通科技基金资助项目（H111036） |
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| 摘 要： | 根据天然土体及室内配制土样颗粒分析、干密度、渗透、渗透变形试验结果，基于土体分形理论计算了土体质量分维数，土体孔隙度、不均匀系数、中值粒径、干密度、渗透系数与分维数关系密切。当分维数较大时，表示小于某粒径颗粒累积含量较少，颗分曲线越平缓，土体有粗化现象，不均匀系数及中值粒径都在增大，孔隙度减小，干密度增大。利用土体分维数可判断出土体渗透破坏形式（如管涌、流土），土体发生渗透破坏后分维数减小，渗透破坏过程中分维数逐渐减小，并随流失颗粒粒径的增大而加速减小。
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| 关 键 词： | 分维数 分形特征 渗透变形 渗透破坏过程 |
Preliminary Study on Fractal Law of Levees Soil Seepage Deformation and Failure |
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| DUAN Xiangbao,LIU Yunhu,YANG Chao,WANG Feng,XIE Luofeng and YUAN Yanxin.Preliminary Study on Fractal Law of Levees Soil Seepage Deformation and Failure[J].International Journal Hydroelectric Energy,2013,31(7):100-103,214. |
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| Authors: | DUAN Xiangbao LIU Yunhu YANG Chao WANG Feng XIE Luofeng and YUAN Yanxin |
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| Affiliation: | State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China;Jinhua Incoming Management Department, Jinhua 321017, China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China;Jinhua Incoming Management Department, Jinhua 321017, China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China |
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| Abstract: | According to natural soil mass, indoor mix soil sample grain size analysis, dry density, seepage and permeability test result, fractal theory is used to calculate quality fractal dimension of soil mass. It finds out that the soil pore, uniformity coefficient, median particle diameter, dry density and permeability coefficient are closely related to fractal dimension. And compare variation of fractal dimension in the process of seepage deformation. Fractal dimension corresponds to increase with the coefficient of uniformity, median particle size, permeability and dry density. The discrimination value of fractal dimension about soil permeability was given. After soil seepage deformation occurred, fractal dimension would get smaller. With the framework particles losting, the fractal dimension would reduce fast. |
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| Keywords: | fractal dimension fractal law seepage deformation seepage failure process |
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