贵州红粘土塑性图分布特性及机理分析  

Distribution characteristics and mechanism analysis of plastic diagram of Guizhou red clay

作　　者：唐薇 伍廷亮[1] 邵元 张贝贝 TANG Wei;WU Tingliang;SHAO Yuan;ZHANG Beibei(Guiyang University,Guiyang 550005,China)

机构地区：[1]贵阳学院,贵州贵阳550005

出　　处：《贵州科学》2021年第6期86-90,共5页Guizhou Science

基　　金：贵州喀斯特地区红粘土特殊性质指标的地域性差异及其形成机理的研究,黔教合KY字〔2018〕307。

摘　　要：通过对贵州红粘土1399组实验数据的统计和分析,发现贵州红粘土散点在塑性图上的位置有自己的特点:散点的展布方向与一般土一致;随着液限值的增高,它的天然含水率增大,但稠度状态更坚硬;红粘土在天然状态下表现出粉土的特点。通过统计软件找到液限指标和塑性指数与天然含水率的相关关系;再通过粒度分析实验,证明红粘土天然状态下的“假粉粒”现象。分析出红粘土红土化作用程度和成分是它在塑性图特殊分布的原因。Based on the statistics and analysis of 1399 groups of experimental data of Guizhou red clay,it is found that the position of red clay scatters in the plastic diagram has its own characteristics:the distribution direction of scatters is the same as that of the general soil;with the increase of liquid limit value,its natural water content increases,but its consistency state is harder,and the red clay shows more characteristics of silt in the natural state.The relationship between the liquid limit index,the plasticity index and the natural moisture content is found by statistical software,and the phenomenon of“false silt”in the natural state of red clay is proved by particle size analysis experiment.It is found that the degree of lateritization and composition of red clay are the reasons for its special distribution in the plastic diagram.

关 键 词：贵州红黏土 塑性图 红土化作用程度 

分 类 号：P642.13[天文地球—工程地质学]