Abstract: A structure, in particular, a wind turbine tower (1), which is pre-tensioned with at least one tensioning element (3), has a foundation (2), a concrete tower section (4), in particular, consisting of a plurality of precast concrete elements (5), as well as a head piece (6), wherein the tensioning element (3) at least at one of its ends has a tendon anchor (7, 7a, 7b). The tendon anchor (7, 7a, 7b) has an accommodation (8) in which a first end (10a) of an anchor rod (9) is fastened, in particular screwed in. A second end (10b) of the anchor rod (9) is anchored to the foundation (2) or to the head piece (6). In a corresponding method for manufacturing a structure, a first end (10a) of an anchor rod (9) is fastened, in particular screwed in an accommodation (8) of a tendon anchor (7, 7a, 7b), and a second end (10b) of the anchor rod (9) is anchored to the foundation (2) or to the head piece (6).

Abstract: A tower segment for at least a section of a tower includes a tower segment defining an interior, a longitudinal axis, and a wall, and a supply structural segment preassembled in the interior of the tower segment extending along a the longitudinal axis of the tower segment. The supply structural segment is movable relative to the tower segment and connected to the wall of the tower segment so that the supply structural segment can be moved at least from an assembly position to a connecting position. Other tower, tower segment, support structure, support structural segment, and methods of erection of same use at least a tower segment of a tower.

Abstract: A tower for a wind turbine includes at least one tower section made of concrete, made up of several annular concrete segments arranged on top of one another with horizontal joints. Each concrete segment includes at least two annular segment prefabricated concrete parts arranged in parallel with vertical joints. The each have one outer side, one inner side and one upper, lower and two lateral contact faces. The concrete segments are connected to one another in the vertical direction by vertical clamping devices.

Abstract: In a method for producing a concrete foundation for a wind power tower externally preloaded and made of precast concrete parts, a formwork for the concrete foundation is erected, core elements for producing passage openings in the concrete foundation for the loading elements are positioned and fixed on the formwork, and the concrete foundation is cast. A measurement reference system is established in order to position the core elements, at least one first positioning aid having an adapter device for a core element and having at least one reference segment is provided on the formwork. A corresponding concrete foundation is produced in accordance with the described method. A positioning device for orienting core elements in a concrete foundation comprises at least one first positioning aid, which has an adapter device for a core element and at least one reference segment for calibrating the first positioning aid.