黔中红粘土含水性及指标特殊性研究  

Study of Water Content and Index Particularity of Qianzhong Red Clay

作　　者：闫建[1] 贺珺[2] 

机构地区：[1]中国建筑科学研究院地基基础研究所,北京市100013 [2]北京国环清华环境工程设计研究院有限公司,北京市100084

出　　处：《勘察科学技术》2011年第1期5-9,共5页Site Investigation Science and Technology

摘　　要：红粘土是贵州省工程建设中遇到最多、分布最广的土类。该文通过对黔中红粘土含水性指标的试验和统计,发现黔中红粘土天然含水率和饱和度有自身的特点:一是高含水率指标与稠度状态指标的关系较特殊;二是普遍存在饱和度大于理论最大值的现象。结合红粘土特殊成分结构分析,认为其原因是红粘土中存在大量结合水。然后提出用"等效天然含水率"和"等效饱和度"指标来修正其含水性指标并分析评价红粘土,可以消除结合水产生的不合理影响,便于与其它土类的含水性指标进行对比。Red clay is encountered mostly and distributed most widely in engineering construction in Guizhou Province.Through the experiments and statistics of water content index of Qianzhong red clay,it finds out that the natural water content and the saturation degree of Qianzhong red clay have its own characteristics.First,the relation between high water content index and consistency index is specific;second,the phenomenon of saturation degree bigger than the theoretical maximum is normally occurred.Combined the analysis on the special composition and structure of red clay,the reason is that there is a lot of the combined water in red clay.Then,the ＂equivalent natural water content＂ and ＂equivalent saturation＂ are put forward,and they are used to amend the water content index and evaluate red clay,so as to eliminate the unreasonable influence produced by the combined water,and it can easily contrast with the water content index of other soil.

关 键 词：黔中红粘土 含水率 等效含水率 等效饱和度 

分 类 号：TU442[建筑科学—岩土工程]