Annular drilling rock-socketed single pile foundation for offshore wind power

The utility model discloses an offshore wind power annular drilling rock-socketed single pile foundation, and relates to an offshore wind power foundation structure. The upper end of the outer steel pipe is located above the covering layer, and the lower end of the outer steel pipe is located in the covering layer; the upper end of the inner steel pipe is located in the covering layer, and the lower end is located in the rock stratum. Steel pipe grout is arranged between the outer wall of the inner steel pipe and the inner wall of the outer steel pipe, and rock stratum grout is arranged between the inner wall and the outer wall of the inner steel pipe and a rock stratum. The utility model not only has the advantages of simple structural style and definite stress of the traditional single pile foundation, but also can save a steel casing specially driven for the III-type rock-socketed single pile, and annular section drilling can greatly reduce the rock crushing area, save the energy consumption and improve th