FOUNDATION APEX OF OFFSHORE WIND TURBINE GENERATOR SYSTEM AND FOUNDATION STRUCTURE MEMBER OF OFFSHORE WIND TURBINE GENERATOR SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a foundation apex of an offshore wind turbine generator system, which ensures sufficient strength and besides, enables its cost to be reduced, and to provide a foundation structure member of an offshore wind turbine generator system, having the foundation apex.SOLUTION: The foundation apex of an offshore wind turbine generator system includes: a tower lower steel pipe 20 which is formed of a steel pipe, supports from below a tower of wind turbine and is coaxially arranged on an axis line P of the tower; a plurality of diagonal members 19 which are arranged in a spaced manner in a circumferential direction at an outer circumferential surface 20a of the tower lower steel pipe 20, and which extend downwardly from the outer circumferential surface 20a toward a radially outside and connected to a plurality of legs 16 which are arranged so as to be spaced each other in a circumferential direction and at positions lower than the tower lower steel pipe 20; a truss structure part 30 which is arranged at a position radially inner than the legs 16 and supports from below the tower lower steel pipe 20; and a plurality of horizontal members 18 for connecting the legs 16 with the truss structure part 30.