网纹红土红白色网纹的分形研究

Fractal Approach on the Texture of the Reticulated Red Clay

网纹红土的网纹结构是其最主要的结构特性,其网纹包括红色网纹和白色网纹。本研究采用金相显微镜获取网纹红土微观结构图像,再利用IPP图像处理软件对网纹红土红白色网纹部分的微观结构图像进行预处理、图像增强、图像分割、图像二值化等步骤;再提取反映土体微观结构的特征参数,并对微观结构进行分形研究,得出网纹红土红白色网纹在分形结构上的差异性,为工程问题的解决提供参考。研究表明,网纹红土红白色网纹微观结构的孔隙大小符合分形特性,其孔隙分维数在1.06-1.39之间;红色网纹比白色网纹部分的土样自组织程度更高、级配更好、土体的结构更复杂。

The texture structure which includes the red and white textures is the most important characteristic of the reticulated red clay.The IPP image processing software is used to study the microstructures of the reticulated red clay in this paper.After the preprocessing which includes the image enhancement,image segmentation and the image binarization,the characteristic parameters that reflecting soil microstructures can be obtained.By studying the fractal dimensions of the reticulated red clay samples,the differences of fractal structure about reticulated red clay in red and white can be differentiated for the engineering applications.The results indicate that the size of the reticulated red clay has the fractal feature and the fractal dimension is between 1.06 and 1.39.The red textured samples have a higher self-organization,gradation and more complex than those of the white textures.