Apparatus and method for installing anchor bolts in a cylindrical pier foundation

In a foundation for a wind turbine, the foundation comprising a plurality of anchor bolts axially disposed within a bore hole for mounting a tower flange of the wind turbine, a pre-assembled bolt package comprises:

• a maximum of twenty anchor bolts in axial alignment with each other, the anchor bolts configured to form an inner arc of bolts and an outer arc of bolts, wherein each bolt is retained, by position retention means, in a fixed position with respect to the position of the other anchor bolts in the pre-assembled package.

In a foundation for a wind turbine, the foundation comprising a plurality of anchor bolts axially disposed within a bore hole for mounting a tower flange of the wind turbine, wherein the plurality of anchor bolts comprise a plurality of pre-assembled bolt packages comprising a maximum of twenty anchor bolts in axial alignment with each other, the anchor bolts of each pre-assembled bolt package are configured to form an inner arc of bolts and an outer arc of bolts, wherein each bolt is retained, by position retention means, in a fixed position with respect to the position of the other anchor bolts in the pre-assembled package, an assembly jig for fabricating the pre-assembled bolt package comprises:

• at least two parallel rails and a plurality of lower cross-supports disposed between the parallel rails for supporting the inner arc of bolts.