Abstract:The compression modulus of soil is the important indicator that can be used to evaluate the compressibility of soil and calculate foundation deformation,validating its importance in engineering research.In this study,soils from Beijing,were analyzed to determine the variability of geotechnical parameters and the relation between the physical and mechanical indices.The analysis results showed that there was little variability in the physical property indices,but the variability of the mechanical indices was relatively large.For example,the compressibility of silt was affected by the gravity stress,the natural density,the saturation,the porosity ratio,and other factors.The mechanical properties of cohesive soils were affected by the gravity stress,the moisture content,the natural weight density,and the liquidity.A multivariate linear regression model of the compression modulus,the moisture content,the natural density,and the gravity stress was developed.This model indicated that there was regional representation in the soils tested.