The invention discloses a ship lengthening and
reconstruction method, and belongs to the technical field of ship lengthening and reconstruction, and the method comprises the following steps of ship surveying and scribing,
cutting, bow section pulling, segmented carrying, bow section folding and corollary equipment refitting. Displacement of the bow section is achieved through the method that the air bag and the traction device are matched, the difficulty that shipyard infrastructures are insufficient is overcome, meanwhile, cost is greatly reduced, the requirement for a shipyard foundation is not high, the method is suitable for the dock and the
slipway, the applicability is wide, cost is low, and the period is controllable; according to the five-segment line
inspection method, five segments are matched with a
laser device to measure and
record the deflection value of the ship position, a small segment carrying method is adopted for segmentation, the carried and folded segments can be finely adjusted in time, and the lengthening and reconstruction precision is improved; the large opening position and the weak structural strength position of the bow section are supported and reinforced after segmented lineation, the
cut plane is perpendicular to the center line of the ship, and it is further guaranteed that the precision of the ship is controllable.