不同标准下细粒土塑性指数关系的研究

The Relationship of Fine-grained Soil’s Plasticity Index Under Various Standards of Liquid Limit

细粒土的塑性指数和液限是综合表征工程土性质的重要特征指标 ,是细粒土分类的最主要的依据。通过对取自不同地区的土样进行液限、塑限联合测定 ,分别测试出各种土样在 1 7mm和 1 0 mm液限标准下的塑性指数。采用最小二乘法给出了不同液限标准下细粒土塑性指数之间的回归线性关系。并给出了对应 1

For fine grained soil,the plasticity index and liquid limit are the important characteristic indexes to indicate engineering natures.The indexes are main standards of soil classification.In this paper the experiment of liquid limit and plastic limit is performed on some soil samples from various sections,testing every speciment’s value of plastic limit and liquid limit of the cone (76g) dropping for 17mm and 10mm,calculating their plasticity index under various standards of liquid limit.Thus, the linear correlation between various standard plasticity indexes is proposed by the method of minimum two mutiply.The reference figure of classification is proposed to class fine grained soil using 17mm standard plasticity index.