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粉土粒度分布的分形特征

, PP. 10-14

Keywords: 道路工程,粉土,粒度分布,分形维数

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Abstract:

应用分形几何学理论,分析得出颗粒系统的粒度体积累积分布函数分形表达式,认为分形维数可以作为粒度分布特点的表征参数;并采用Mastersizer2000激光衍射粒度分析仪对不同粉土进行了粒度测试。分析结果表明在双对数坐标下,粉土颗粒的粒径大小与该粒径的累积通过率具有正比关系,粉土的粒度分布满足分形特征,分形维数可以作为粉土粒度分布特征的表征参数。该参数能有效反映粒度分布的均匀程度,且当满足分形特征时,只需知道2个以上的粒径累积通过率就可以计算出该土的分形维数,并绘出粒度分布曲线。

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