Abstract: The physical and mechanical properties of silty clay in Tai’an city are presented in this paper. Based on a large number of geotechnical test data, the correlation analysis is performed, and a linear regression model is established. The linear regression equation between indicators is fitted, and the normal distribution of indicators is tested by skewness and kurtosis methods. The results show that the silty clay in the urban area of Tai’an City has low water content, small void ratio, mainly plastic state, medium compressibility soil, slightly high shear strength. The statistical dispersion of physical indicators is less than that of mechanical indicators; There is a positive correlation among void ratio, liquid index, compressibility coefficient and water content, void ratio and liquid index, liquid limit and plastic limit, plastic index and cohesion have a positive correlation, while liquid index and compression modulus have a significant negative correlation. Water content, liquid index and internal friction angle conform to normal distribution, void ratio, liquid limit, plastic limit and compressibility coefficient are approximately normal distribution, and other physical and mechanical indexes are non-normal distribution.

Key words: Silty Clay, Physical and Mechanical Indices, Correlation, Tai’an City