Abstract: The invention relates to a tower (1) comprising a lower tubular tower section (2) made of concrete, an upper tubular tower section (3) made of steel and an adapter piece (7) for connecting the two tower sections (2, 3). The adapter piece (7) consists of an annular concrete element (8) and a steel element (9), the steel element (9) containing at least one annular flange (9a) that covers preferably entirely a surface of the concrete element (8), said surface being at the top in the installed state. The steel element (9) is directly cast together with the concrete element (8), wherein the annular flange (9a) is completely underpoured, essentially without air inclusions. In a method for producing a tower (1) comprising an adapter piece (7), a steel element (9) having an annular flange (9a) is placed head down into an annular formwork in order to produce said adapter piece (7).

Abstract: A supply frame for a tower, a wind turbine tower and related methods include use of annular or annular segment-shaped prefabricated concrete parts to support internal tower structures. Supply frame modules may form a self-supporting unit that can be attached in suspended fashion to an upper prefabricated concrete part of the tower. The supply frame may have a framework-like grid structure stabilized by traction forces from its own weight and live load.

Abstract: A method for the production of a tower of a wind power plant is disclosed wherein at least one tubular tower section is produced from annular precast concrete parts having two horizontal contact surfaces, which are arranged on top of one another. After casting, the annular precast concrete parts are set up in a processing station in the precast plant and the two horizontal contact surfaces of the precast concrete parts are processed in an orientation setting in a plane-parallel, material-removing manner. A tower of a wind power plant comprises at least one tubular tower section of annular precast concrete parts having two horizontal contact surfaces, which are arranged on top of one another. Both horizontal contact surfaces of the precast concrete parts are reworked in a plane-parallel, material-removing manner with a small parallelism deviation and a small flatness deviation.

Abstract: The invention relates to a method for the production of a tower (1) of a wind power plant, wherein at least one tubular tower section (2) is produced from annular precast concrete parts (5) having two horizontal contact surface (21), which are arranged on top of one another. After casting, the annular precast concrete parts (5) are set up in a processing station (27) in the precast plant and the two horizontal contact surfaces (21) of the precast concrete parts (5) processed in a fixture in a planparallel, material-removing manner. A tower (1) of a wind power plant comprises at least one tubular tower section (2) of annular precast concrete parts (5) having two horizontal contact surfaces (21), which are arranged on top of one another. Both horizontal contact surfaces (21) of the precast concrete parts (5) are reworked in a planparallel, material-removing manner with a parallelism deviation and a flatness deviation of few tenths of a millimeter, preferably less than 0.2 mm.

Abstract: The invention relates to a tower (1) comprising a lower tubular tower section (2) made of concrete, an upper tubular tower section (3) made of steel and an adapter piece (7) for connecting the two tower sections (2, 3). The adapter piece (7) consists of an annular concrete element (8) and a steel element (9), the steel element (9) containing at least one annular flange (9a) that covers preferably entirely a surface of the concrete element (8), said surface being at the top in the installed state. The steel element (9) is directly cast together with the concrete element (8), wherein the annular flange (9a) is completely underpoured, essentially without air inclusions. In a method for producing a tower (1) comprising an adapter piece (7), a steel element (9) having an annular flange (9a) is placed head down into an annular formwork in order to produce said adapter piece (7).