Many hydropower hubs in the central and western regions have design heads above 100 m,making single-stage ship locks unable to meet their navigation requirements with current technology.To address this major technical challenge of increasing the design head of single-stage ship locks,we conduct a study on 100-meter class ship locks on the basis of the Xiangjiaba hydropower hub on the Jinsha River.In accordance with the actual terrain and geological conditions of the site,as well as the requirements of relevant codes and model test results,we complete the general layout,make preliminary plans for the division of water levels,the parameters of water-saving basins,peak flow rates during filling and emptying,and energy dissipation facilities within the ship lock chamber,and use finite element numerical calculations to analyze the stability,strength,displacement,and foundation bearing capacity of the hydraulic structures.The results indicate that the general layout of the 100-meter class giant water-saving ship lock is reasonable,and the conveyance system is feasible.Under controlled conditions,the structure is stable,with foundation stresses less than the bearing capacity of the bedrock.During earthquakes,structural deformation remains within allowable limits,and stresses (after excluding local singular points) can be achieved with reinforcement.Overall,the hydraulic structure is implementable.The navigation head of single-stage ship locks has been successfully increased from the 40-meter class to the 100-meter class,demonstrating feasibility in terms of general layout,water conveyance systems,and hydraulic structures.