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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 the most widely encountered and widely distributed soil in Guizhou Province. Based on the experiment and statistics of the waterborne red clay index in central Guizhou Province, it is found that the natural water content and saturation of red clay in Guizhou Province have their own characteristics. First, the relationship between high water cut index and consistency index is rather special. Second, There is a phenomenon that the saturation is greater than the theoretical maximum. Combined with the structural analysis of special components of red clay, the reason is that there is a large amount of bound water in red clay. Then it is proposed that the “equivalent natural water content” and “equivalent saturation” indexes can be used to correct their water content indexes and analyze and evaluate the red clay so as to eliminate the unreasonable influence caused by the combined water and facilitate the interaction with other soil types Water-based indicators for comparison.