How to scientifically and reasonably determine the navigation clearance dimensions for river-crossing structures,particularly the navigation clearance standards for bridges along the project route,which is an universal and critical issue that needs to be urgently resolved in the construction of high-class artificial canals.It is essential to conduct multi-factor,multi-dimensional research on it during the project’s preliminary phase.Regarding the navigation clearance standards for river-crossing structures along the Pinglu Canal project,the preliminary thematic research and demonstration process involves an in-depth study of the navigation clearance dimensions for bridges along the canal.The study is conducted from the aspects of waterway planning,navigation standards,waterway characteristics,existing bridge conditions,vessel types in the connected basins,and bridge navigation clearance dimensions,combined with design representative vessel types.The results show that that bridges along the Pinglu Canal project should adopt a single-span two-way navigation design,with the navigation span crossing the navigable waterway in a single leap.The navigation clearance height shall not be less than 18 m.The research results can provide reference for the construction of high-class artificial waterways.