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三峡双线五级船闸水头113m单级最高工作水头45．2m，闸室有效尺寸280m×34m×5m。共设人字门24扇，总重20000t，预计整体调试时间长达1年之久，安装时间将不足两年。影响工期的制约因素是门体吊装和运输，而决定安装质量的是门体焊接变形控制。第二闸首人字门安装是关健，有就地顶升法和浮式移位法。后者可使底坎混凝土浇筑时间缩短20天，移位操作时间缩短12天，停航时间缩短62天。
Three-Gorges double line five-stage lock head 113m single-stage maximum working head of 45.2m, the effective size of the lock chamber 280m × 34m × 5m. A total of 24 gables, total weight 20000t, the overall debugging time is expected to be up to 1 year long, the installation time will be less than two years. Constraints that affect the duration of the lifting and transportation of the door, and the decision of the quality of the installation is the door deformation control welding. The second gate gable door installation is key, there are local law of lift and floating shift method. The latter can make the bottom concrete pouring time reduced by 20 days, shift operation time shortened 12 days, stopping time shortened 62 days.