Abstract:Long-distance navigation tunnels face critical technical challenges of affecting the improvement of the tunnel’s passing capacity,such as small cross-sectional coefficients in confined channels,interconnection of tunnels and vessel navigation factors.We take the Goupitan navigation tunnel as the case study,and adopt an integrated methodology combining data analysis,technical research,hydro-physical model and self-propelled ship model test to systematically investigate flow conditions and safe navigation control technology for ships in long-distance navigation tunnels.We reveal the relationships among the scale of the tunnel and the rules of ship travelling wave,ship navigation resistance,sinking volume and ship maneuverability,further propose the principles and main design parameters to determine the scale of the 1，000-ton class tunnel suitable for the Wujiang River waterway,and provide the maximum safe velocity under different tunnel section scales.The results show that with the same main cross-section scale tunnels,ship maneuverability is significantly improved through the tunnel interconnections,and with 60 m spacing connectivity,the maximum safe ship velocity is increased by about 15%.
