岩土力学Issue(9)：2443-2447,5.
土-水特征曲线的分形特性及其分析拟合
Fractal characteristics and fitting analysis of soil-water characteristic curves
摘要
Abstract
In order to establish a fitting approach for soil-water characteristic curves (SWCC) with clear physical meanings, a method is presented to directly calculate the fractal dimensions through the SWCC data based on the fractal theory, and a fractal model of SWCC is proposed. To verify the proposed fitting method, seven clay samples with different dry densities are prepared using hydraulic jacks, and the soil-water characteristic curves are measured by using the pressure plate apparatus. Based on the experimental results of SWCC, the fractal dimensions are calculated. On this basis, fitting analysis of the SWCC data is performed by using the presented method. The results show that, all the correlation coefficients of the seven samples range from 0.97 to 0.99, which indicates good fractal characteristics of SWCC as well as good fitting performance of the proposed method. In addition, it is found that the fractal dimensions and the air entry values increase almost linearly with the dry density. On this basis, a prediction method of SWCC at different compaction degrees is also proposed and tested. The prediction results are in good agreement with the measured values.关键词
土-水特征曲线/拟合分析/分形维数/分形模型Key words
soil-water characteristic curve/fitting analysis/fractal dimension/fractal model分类
建筑与水利引用本文复制引用
陶高梁,孔令伟,肖衡林,马强,朱志政..土-水特征曲线的分形特性及其分析拟合[J].岩土力学,2014,(9):2443-2447,5.基金项目
国家自然科学基金（No.51209084）；教育部重点项目（No.2010133）；湖北省建设科技项目（鄂建文[2012]78号-48）。 （）
