This study focuses on the vibro-replacement stone columns composite foundation treatment scheme adopted for the Jiangxi Xinjiang Shuanggang navigation lock due to limited excavation scope.Numerical simulations are conducted using the finite element method based on the elastoplastic constitutive model,and a comparative analysis is performed with actual observation data.The research investigates the application of vibro-replacement stone columns composite foundation in navigation lock engineering,with emphasis on analyzing the settlement control effect of the stone columns composite foundation.Through the finite element model calculations,the settlement of the composite foundation is obtained and compared with field observation data.The research conclusions indicate that the settlement calculated using the finite element method has a linear negative correlation with the elastic modulus of the composite foundation soil.Increasing the elastic modulus of the composite foundation soil can effectively reduce the settlement.The measured settlement is in good agreement with the model calculated using the field plate load modulus.