Abstract: The immersed pipe transportation and installation ship used in Shenzhen-Zhongshan link immersed tunnel project accomplished immersed pipes connection and outfitting in the secondary outfitting area of Guishandao prefabrication plant. In severe environments such as typhoon, the immersed pipe transportation-installation rig is easy to collide with the bank wall of the secondary outfitting area. To avoid this phenomenon, the computational fluid dynamics method is used to calculate the wind and flow loads of immersed pipe transportation-installation rig, and the mooring system of immersed pipe transportationinstallation rig under the influence of typhoon environment in outfitting area is simulated using threedimensional potential flow software AQWA. Additionally, the motion response and mooring cable tension of the immersed pipe transportation-installation rig under the combined action of wind, wave, and current are calculated and analyzed in the time domain. The calculation results show that the immersed pipe transportationinstallation rig docks in the secondary outfitting area will not collide with the bank wall of the secondary outfitting area without closing the dock gate when adopting the recommended mooring system in case of typhoon of grade 10 or lower, and the dock gate should be closed to ensure the safety of windlass in case of typhoon higher than grade 10.

Key words: Shenzhen-Zhongshan link, immersed pipe transportation-installation rig, outfitting area, typhoon condition, motion response, mooring cable force