Relying on the Yushan Bridge connection area project，it is determined that the permanent embankment shall be reinforced with the sunken tube and gravel columns composite foundation based on basic design information. The Slide and Lizheng software are used for the analysis of the stability and settlement of the dike，thus the corresponding inspection requirements are proposed. The test tube inspection data and theoretical calculations are rechecked，and the recommended values of related parameters in the design of foundations similar to sunken tube and gravel columns composite foundation are provided.