| 摘要 |
PURPOSE:To enable manufacture of a title structure without an increase in the scale of a manufacturing shop and the size of a crane, by a method wherein a guide tower, erected upright on a sea bottom, guide piles, and units, with which a tower-shaped off-shore structure is formed, are manufactured independently from each other, and are assembled at an installation place. CONSTITUTION:A guide tower 2, guide piles 3, and structure units 4 are previous ly manufactured in a shop. After the guide tower 2 is erected upright on a sea bottom at an installation place, the lowermost structure unit 4 is seated on a sea bottom with the aid of the guide tower 2 serving as a guide. There after, after the guide piles 3 are inserted into an insertion part 15 of the struc ture unit 4 from above and are driven into the sea bottom, the structure units 4 are orderly piled up with the aid of the guide tower 2 and the guide piles 3, serving as a guide, and this builds a tower-shaped off-shore structure which has a working platform 10 emerged from a sea surface. |
