饱和软土微结构分形特征的试验研究

分形几何学是研究具有自相似性的不规则曲线、具有自反演性的不规则图形、具有自平方性的分形变换以及具有自仿射的分形集等内容的一种理论，是岩土微观结构力学研究和应用的新的生长点。将分形几何学的理论运用于饱和软土微结构研究，关键是获得微结构的参数。利用液氮真空冷冻制样技术、扫描电子显微镜技术和计算机图像处理技术，对广东科学中心饱和软土颗粒分布分维值和孔隙分布分维值等微结构分形参数进行了提取，采用回归分析的方法，对颗粒分布分维值、孔隙分布分维值和孔隙度的关系进行了分析，明确了颗粒分布分维、孔隙分布分维等微结构参数的分形特征的宏观本质。

Research on microstructure fractal features of the saturation soft soil

Fractal geometry is a method of discovering the rules such as self-similarity of irregular curves, the self-inverse of irregular figures, the self-squaring of fractal translations, the self-affine of fractal groups and so on. If it applies on the research jobs of micro-structural fractal features, some key-techniques of soil microstructure mechanic would soon be solved. To use the fractal geometry in micro-analysis of saturation soft soil, the most important thing is to get microstructure fractal features parameters such as the fractal dimension of grains, the fractal dimension of holes. With the liquid nitrogen refrigeration sample-made technique, the scan electronic microscope technique （SEM） and the image-processing-analysis and computer-vision technique，46 group samples’ microstructure fractal features parameters of saturation soft soil which withdraw from Guangdong Scientific Center are extracted. By adopting variable gradually linearization regress analyses, the relationship between the fractal features and the porosity are discussed.