粘性土塑性指数与粘粒含量的线性回归分析

以浙江某地区粘土为例，对饱和软粘土的塑性指数与粘粒含量的关系进行回归计算．用密度计法测得粘性土的粘粒含量，用液塑限联合测定仪测出粘性土的塑性指数，并对二者进行线性回归分析，得出粘性的塑性指数与粘粒含量的线性回归方程，证明了粘性土的粘粒含量与塑性指数存在很好的对应关系，从而省略密度计试验繁琐的试验过程，简化计算，提高了工作效率和数据的精度．

Linear Regression Analysis on Clay Plasticity Index and Clay Content

Through laboratory soil tests, clay content was obtained by densitometer and clay plasticity index was measured with liquid plastic combine tester, which were both analyzed by linear regression method. The equation of linear regression between clay content and clay plasticity index was deduced, which could be used to deduce clay content with plasticity in- dex of cohesive soil. This achievement will provide reliable basis for engineering evaluation of soil.