摘要
钙质砂是一种含碳酸钙达50%以上的海洋生物成因的粒状材料。颗粒棱角度高、形状不规则,影响钙质砂的压缩、填充等力学性能。通过光学显微镜获取钙质砂颗粒的几何投影图像,借助Matlab图像处理软件,分别运用常规统计方法和分形理论对钙质砂颗粒的几何形态进行了描述,并结合钙质砂特殊的生物成因对其表现出的特性进行了分析。结果表明:钙质砂颗粒的形状具有分形特性,且随着颗粒粒径的减小,分形特性越明显。
The calcareous soil is a special rock and soil medium which composes more than 50 % Ca CO3. It has irregular grain shape, which correlates mechanical and engineering properties of compression and filling in calcareous soil. Using optical microscope, the grain projection of calcareous soil is got. With image processing tool of matlab,grain shape of calcareous soil is analysed in two ways：one is the traditional statistics way; the other is the fractal geometry. The results show that the grain shape of calcareous soil can be expressed by fractal dimension. And the character is getting more obvious when the grain is getting smaller. And the character of calcareous soil is analysed with its special cause of formation.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第9期1389-1392,共4页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.40272121)
科技部"十五"南沙群岛及其邻近海区综合调查项目--2001年度中央级科研院所社会公益研究专项资金项目(No.7001DIA50041)。
关键词
钙质砂
颗粒形状
分形维数
图像处理
calcareous soil
grain shape
fractal dimension
image processing
