Method for constructing a foundation for a wind power generation system

摘要

The condition of a seabed 200 and the condition of tidal currents near the seabed 200 are investigated in advance to examine the number of filter units (FUs) 50 and the position where the FUs 50 are to be installed. Then, piles 12b as a base of a foundation are provided so as to be supported by a bearing layer. A plurality of FUs 50 are installed in close contact with each other between the seabed 200 and each pile 12b. Then, a formwork 12e for a base slab portion 12a is installed on the upper ends of the piles 12b. Concrete is placed in the formwork 12e to form the base slab portion 12a. Then, a tower 11 is fixed to the upper end of the base slab portion 12a.

主权项

1. A method for constructing a foundation for a wind power generation system, for holding an offshore wind power generation system above a sea surface, and for supporting a tower of said wind power generation system, which foundation extends from a position above the sea surface down to a level near a seabed, comprising:
installing a plurality of bag-shaped filter units containing predetermined block objects, between said seabed and a base supported by and fixed in a predetermined ground or fixed in an excavated seabed, providing a base slab portion on an upper end of said base, installing the base in the predetermined ground so that the base is supported by and fixed in the predetermined ground or fixed in the excavated seabed, before installing the plurality of bag-shaped filter units containing the predetermined block objects between the seabed and the base, and providing the tower on the base slab portion, wherein the base slab portion is fixed below the sea surface, wherein said base slab portion is solid without through-holes and is supported on top of a pile, wherein installing said plurality of filter units includes stacking said plurality of filter units in a vertical direction on the seabed but underneath the base slab portion.