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《Journal of Chang'an University(Natural Science Edition)》 2007-02
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Fractal approach on soft soil subgrade microstructure SEM image

MAO Ling-tao1,XUE Ru2,YUAN Ze-xun3(1.State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Beijing 100083, China;2.Department of Architecture Engineer Management,Zhengzhou Institute of Aeronautical Industry Management,Zhengzhou 450015,Henan,China;3.Center of Education Training,Beijing City University,Beijing 100083,China)  
Based on the creation of fractal model,three kinds dimensions,such as porosity density dimension,porosity distribution dimension and porosity edge shape dimension,are proposed to describe the variations of porosity in soft soil microstructure SEM image.Taking the highway subgrade reinforcement in Zhujiang Delta as an example,this paper analyzes the soil SEM image with fractal dimensions.According to the analysis,these dimensions of the reinforced soft soil diminish in different degrees,which indicate that the distribution area of porosity decreases,the structure units array more tightly,the porosity size distribution becomes uniform,and the edge of porosity turns smooth.All of these results disclose that the distribution and the shape of porosity have fractal feature.Different fractal dimensions show the reinforced effectiveness and the feature variations of soil mass from different views.1 tab,4 figs,15 refs.
【Fund】: 国家973计划重大项目(2002CB412701)
【CateGory Index】: U416.1
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