Construction method of inner tank in flat bottom cylindrical tank

摘要

PROBLEM TO BE SOLVED: To curtail a construction period of a flat-bottomed cylindrical tank.SOLUTION: A construction method according to an embodiment of the present invention includes the following steps for: installing a plurality of frames on a bottom plate; forming an annular plate below the frame; forming a first tier of a side plate on the annular plate, under the frame; forming a second tier and onwards of the side plate sequentially above the frame; and removing the frame and welding the first tier of the side plate and the second tier and onwards of the side plate. A step for sequentially forming the second tier and onwards of the side plate is performed simultaneously with either or both of the step for forming the annular plate and the step for forming the first tier of the side plate on the annular plate.SELECTED DRAWING: Figure 2