Abstract: The soil stratigraphy and statistical analysis of the geotechnical engineering parameters are the important content of the geotechnical investigation. The accuracy of soil stratigraphy classification directly affect the site soil geotechnical engineering performance evaluation. In the conventional geotechnical investigation, the preliminary soil layers are classified based on the geological sediment conditions and soil parameters. The layers are finalized based on the laboratory test results and the soil layers can be adjusted. This paper presents a case history of the geotechnical investigation in Wangjing area of Beijing. The geotechnical engineering statistical works in areas with rich tested data are proposed. The soil parameters for major soil layers are summarized and the standard deviation, coefficient variations are also presented.

Key words: Soil Stratigraphy, Geotechnical Engineering Parameter Statistics, Standard Deviation, Coefficient of Variations, Void Ratio, Compression Modulus ；Shear Strength