The invention relates to the technical field of ships, and discloses a method for floating and shifting a large linear PCTC half ship in a narrow dock, the operation process and the floating and shifting technology are optimized, the dock space can be efficiently utilized, floating, shifting and
pier falling operation of the large linear PCTC half ship in the limited space is achieved, the
utilization rate of the dock is greatly increased, and the construction cost is reduced. By improving the floating
pier falling device and the shifting technology, operation is more accurate and flexible, the operation efficiency is effectively improved, meanwhile, the safety in the operation process is further emphasized, and the safety of operators and the stability of the ship are ensured by optimizing the operation process and taking necessary safety measures. The floating device is arranged, extra
buoyancy is provided at the
tail, the head sealing plate and the
tail sealing plate are designed, extra
ballast is provided by the head, the head sealing plate and the
tail sealing plate can effectively prevent
water flow from impacting the ship body in the floating process, extra
ballast is provided at the head, the problem of poor
buoyancy is directly solved, and the stability of the ship body is improved.