To make it possible to quickly and accurately adjust a horizontal position when an immersed tube is settled.
A settled structure A is suspended to pontoons 20a-20d floated on the surface of the water through hanging wires 31 controlled by winches and, at the same time, horizontal controlling wires 38a-38d, 39a and 39b fixing their ends to the bottom of the water are interlocked with the settled structure A in the plural directions. Hanging wire winches 30 for winding and drawing out the hanging wires 31 and horizontal controlling wire winches 35a-35d, 36a and 36b for winding and drawing out the horizontal controlling wires 38a-38d, 39a and 39b are mounted on the pontoons 20a-20d. The horizontal wires 38a-38d, 39a and 39b drawn out from the horizontal controlling wire winches 35a-35d, 36a and 36b are fixed to the bottom of the water through pulleys borne on the settled structure A, and a horizontal position of the settled structure A is adjusted with the control of the horizontal controlling winches in a state to hang down the settled structure A in the water with the hanging wires 31. When the hanging wires 31 are drawn out to settle the settled structure A, the horizontal controlling wires 38a-38d, 39a and 39b are synchronized with the setting velocity of the settled structure A and are drawn out by the same length as that of the hanging wires 31 to be drawn out.
KOSA TSUNAYOSHI
SHIMOISHI MAKOTO
MIYAGAWA JUNICHI
EDA SHUJIRO
HOTTA YOSHIKI
TOYO CONSTRUCTION
TOA HARBOR WORKS CO LTD
PENTA OCEAN CONSTRUCTION