Abstract: The accurate bearing capacity and the settlement of the composite ground usually could not be obtained by using the current design code method. The critical aspect of the composite ground formed by the rigid column is the load distribution in the columnsoil system. Based on the compatible deformation between the column and the soil, which is the objective of the design optimization, the analytical model of the columnsoilload transfer layer is established by using the elastic theory and the separate stress analysis between the column and the soil. The iteration process is used in order to obtain the stress ratio between the column and the soil. The analytical results are close to the measured results.

Key words: Stress Ratio between Column and Soil, Composite Ground with Rigid Column