水利学报Issue(6)：650-657,8.DOI:10.13243/j.cnki.slxb.20141323
黏性土粒径分布的多重分形特性及土-水特征曲线的预测研究
Predicting soil-water characteristic curve from multi-fractal particle-size distribution of clay
摘要
Abstract
The fractal behavior of soil particle-size distribution (PSD) is characterized by a single fractal dimension,which is related to constants of models for soil-water characteristic curve (SWCC). However,ex⁃perimental evidence shows that a single fractal parameter is not sufficient to characterize a fractal distribu⁃tion for the entire range of soil particle sizes. In order to evaluate multi-fractal parameters potentially capa⁃bility for prediction of SWCC,a series of PSD and SWCC tests was conducted for three clay samples to in⁃vestigate multi-fractal PSDs behavior and prediction of SWCC model. It was found that three domains with different fractal dimension characterize the soil PSD within a wide size range. The magnitude of multi-frac⁃tal parameter is related to particle size. Large fractal dimension corresponds to the domains with large parti⁃cle size. The prediction results obtained from the fractal dimension in each domain are compared with the measured data. The model to predict SWCC is shown to be sensitive to the value of multi-fractal parame⁃ters. The measured data is well agreement with model result obtained from the fractal dimension in domains with large particle size. The results indicate that although the multi-fractal parameters can accurately charac⁃terize soil PSDs, the differences in scaling properties of soil PSDs should be considered in predicting SW⁃CC.关键词
黏性土/粒径分布/多重分形/土-水特征曲线/预测Key words
clay/particle-size distribution/multi-fractal/soil-water characteristic curve/prediction分类
建筑与水利引用本文复制引用
张季如,胡泳,余红玲,陶高梁..黏性土粒径分布的多重分形特性及土-水特征曲线的预测研究[J].水利学报,2015,(6):650-657,8.基金项目
国家自然科学基金资助项目 （）
