【摘要】 本文依据分形理论,研究了我国粘性土的粒度特征,发现在双对数坐标下粒度含量与粒径之间呈直线关系,表明粒度分布具分形结构,据该直线的斜率b由公式D=3-b可求得相应的分维D。计算结果表明,粘性土的分维介于2和3之间,且红粘土的分维大于膨胀粘土大于下蜀土。作者认为分维大小反映了作为自组织系统的土体的本质特征,分维是描述该系统的一个序参量,分维高,自组织程度高,土体演化处于高级阶段。文章还介绍了分维与分选程度、孔隙特征,结构特征的关系。在此基础上,作者指出分维是描述粘性土粒度特征,进行粘性土工程分类的一个合适指标。更多还原

【Abstract】 Features of granularity of cohesive soils are studied herein based on fractionated theory. Thereof a linear relationship between content and size of grain is found on log-log plot,which showed the grain size distribution was in fractionated structure. The corresponding fractionated dimension D may be acquired by the expression D=3-b, where b is the slope of the said line. The calculation results denote that the D of cohesive soil varies within the extent of 2 and 3. The D of laterite is lar,ger than that of other clayey soils. The value of D reflects the properties of soil as a selforganizing system and D is a series parameter describing that system. The larger the value of D the higher the degree of self-organization and consequently, the evolution of soil is in a higher stage. The relationship among D, porosity and structural feature are also presented in this article. The author pointed out that D is a proper index for describing the features of grain size of cohesive soil and also for conducting engineering classification of that soil.更多还原