MARINE CONSTRUCTION METHOD FOR FLOATING BODY-TYPE MARINE STRUCTURE, AND FLOATING BODY-TYPE MARINE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a floating body-type marine structure and a marine construction method thereof that enhance construction efficiency on a sea and curtail a construction period.SOLUTION: A marine construction method for a floating body-type marine structure includes the following steps: a first step in which a floating body structure 1A is made to float on a sea surface and moored, the floating body structure having an insertion hole formed for installing a tower part 1B by inserting the tower part in a vertical direction; a second step in which work for constructing a frame body of the tower part 1B in the insertion hole at a prescribed height, and work for lowering the constructed tower part 1B under a sea surface, are repeated sequentially for constructing the overall tower part 1B, and submerging the tower part 1B under the sea surface except for a top part; a third step following the second step, in which the constructed tower part 1B is lifted utilizing buoyancy, and the lifting work is halted when a connection part of a ring-form hollow part 1C of the tower part 1B floats above the floating body structure 1A, for constructing the ring-form hollow part 1C on the top part of the floating body structure 1A; and a fourth step in which a remaining part of the tower part 1B is lifted after constructing the overall ring-form hollow part 1C, to have the tower part 1B stand independently on the floating body structure 1A.SELECTED DRAWING: Figure 12