摘要
根据分形理论，研究了南京燕子矾下蜀黄土粒度分形结构特征，发现在双对数坐标下粒径和粒度含量之间存在明显的线性关系，表明粒度组成具有分形结构．通过对燕子矾下蜀黄土颗粒分形的计算，发现其分维值介于2．4～2．6之间，随着黏粒含量的增大而增大，且与不均匀系数和曲率系数有良好的非线性关系．在此基础上，讨论了粒度分维所具有的工程地质意义．指出粒度分维揭示了不同土体工程地质性质差异的本质，可以作为土体分类的一个合理指标．
The granularity characteristics of Xiashu loess in Nanjing Yanziji were studied according to the theory of fraetal geometry. It was found that there is a linear relationship between the accumulative granularity percentage content and the grain size in log-log coordinates, that shows granularity constitution posseses the fractal structure. Calculated the fraetal dimension of Xiashu loess in Nanjing Yanziji, the results show that the D of Xiashu loess in Nanjing Yanziji is 2.4 - 2.6. The fraetal dimension increases with the percentage of clay increasing, and there is an obvious nonlinear relationship between inhomogeneous coefficient and curvature coefficient. Based on this, the engineering geology significance of granularity fraetal dimension was discussed. The conclusion is that the fraetal dimension is better index for the description of granularity characteristics and the classification of soils.
出处
《南京工业大学学报（自然科学版）》
CAS
2007年第6期59-63,共5页
Journal of Nanjing Tech University(Natural Science Edition)
关键词
下蜀黄土
粒度特征
分形维数
xiashu loess
granularity characteristics
fraetal dimension.
