摘要
根据分形理论,研究了我国普遍分布的裂隙性粘土粒度成分之分形结构特征,其分维值介于2.600～3.000之间,且灰白色隙壁粘土的分维值≥黄褐色母体土的分维值。在此基础上,讨了分维与土体物质成分、结构特征的关系,以及它所代表的工程地质意义。
The granularity characteristics of fissured clay distributed in China are studied according to the fractal geometry. It's found that there is a linear relationship between the accumulative granularity content and the grain size by double logarithmic grid system,and it's slope b can be used to calculate the relative fractal dimension D by the equation D = 3 - b. Results show that the D of fissured clay changes from 2. 6 to 3. 0,and the D of greyish-white clay is larger than the yellow-brown clay. Further,the D may be taken as the series-parameter,which describes the clay system as a self-organization one. Correlation between fractal dimension and sorting or grading, pore-size distribution, dry density are dissussed respectively. It is concluded that the fractal dimension is a better index for the description of granularity characteristics and the classification of clay.
出处
《山地研究》
CSCD
1997年第4期219-223,共5页
基金
国家地质灾害防治与环境保护专业实验室基金(编号
9410)
