| 陶高梁,张季如,庄心善,杨琳.描述黏粒含量对土-水特征曲线影响规律的分形模型[J].水利学报,2014,45(4): |
| 描述黏粒含量对土-水特征曲线影响规律的分形模型 |
| A fractal model describing the relation between clay content and soil-water characteristic curve |
| |
| DOI： |
| 中文关键词: 土壤 黏粒含量 土-水特征曲线 分形模型 |
| 英文关键词: soil clay content soil-water characteristic curve fractal model |
| 基金项目: |
|
| 摘要点击次数: 3340 |
| 全文下载次数: 58 |
| 中文摘要: |
| 土体黏粒含量对土-水特征曲线有重要影响。为了建立描述黏粒含量对土-水特征曲线影响规律的理论模型，本文基于分形理论，建立了质量分维数与黏粒含量的关系式，利用已有试验数据验证了该式的合理性，并从理论上解释了质量分维数随黏粒含量增大的基本规律。在此基础上，结合已有的研究成果，建立了分形模型描述土体黏粒含量对土-水特征曲线影响规律，该模型预测的土-水特征曲线与已有不同土类样本的试验数据吻合较好，从而证明了该模型的有效性。最后，利用该模型同时预测了不同黏粒含量典型土体的土-水特征曲线，阐明了黏粒含量对土-水特征曲线影响的基本规律，即相同吸力条件下，黏粒含量越高，则体积含水率越高。 |
| 英文摘要: |
| Clay content of soil has an important influence on soil-water characteristic curve. To establish a theoretical model describing the influence of clay content on soil-water characteristic curve，the relation between the clay content and fractal dimension in terms of mass has been established by means of a fractal theory. This relation was verified by test data and used to explain the basic rule that the fractal dimension increases with the increase of clay content. On this basis， a fractal model which reflects the influence of clay content on soil-water characteristic curve was suggested based on the previous results. The results show that the soil-water characteristic curves predicted by the model are in good agreement with several tests data. The model was applied to predict the soil-water characteristic curves of some soils with different clay content and shows the influence of clay content on the soil-water characteristic curve， i.e.， large clay content corresponds to large water content of volume in the case of same soil suction. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |