Research on Hydraulic Characteristics of Navigable Tunnels of High-Dam Navigable Structures and Ship Navigation Test

To deal with the problem of ship navigation under the ultra-small section coefficient of navigable tunnels of high dam navigation structures, a large-scale hydraulic physical model combined with a self-propelled ship model was used to study the characteristics of the unsteady flow of the tunnel discharge and the navigation parameters of ships at different speeds. This paper analysed the influence of the ship lock discharge on the tunnel water level fluctuation and flow velocity, proposed parameters such as the size of the navigable tunnel for 1,000-ton ships, the recommended speed and the amount of ship sinking, which provide references for the design of navigable tunnels for high-grade waterways.