Method for erecting a wind turbine tower

Patent metadata

Field	Value
Publication number	US-2021108615-A1
Application number	US-201917043507-A
Country	US
Kind code	A1
Filing date	Apr 8, 2019
Priority date	Apr 16, 2018
Publication date	Apr 15, 2021
Grant date	—

Abstract

The object is attained by a method of erecting a wind turbine tower having a plurality of tower segments which are tensioned by means of tensioning members. A plurality of tensioning members is provided and a fixing unit is fixed at an end of the tensioning members. Fixing of the fixing unit is effected by placing a multi-part wedge unit at a free end of the tensioning members which comprise a plurality of tensioning wires. A sleeve is fitted over the wedge unit and a pulling tab is fixed on or at the sleeve. The pulling tab has an opening. A cable is fixed at or in the hole in the pulling tab. The cable with the fixing unit and thus the tensioning members is pulled upwardly. The fixing unit is fixed at a segment of the tower, that is to be fixed. The sleeve is removed before the tensioning member is braced.

First claim

1 . A method comprising:
erecting a wind turbine tower having a plurality of tower segments tensioned by tensioning members, the method comprising: fixing a fixing unit at first ends of tensioning members, wherein fixing the fixing unit includes:
placing a multi-part wedge unit at the first ends of the tensioning members, wherein the tensioning members comprise a plurality of tensioning wires;
fitting a sleeve over the multi-part wedge unit; and
fixing a pulling tab on or at the sleeve, wherein the pulling tab has an opening;
fixing a cable at the opening in the pulling tab;
pulling the cable with the fixing unit and the tensioning member upwardly;
fixing the fixing unit to a segment of the tower for tensioning the plurality of tensioning members; and
removing the sleeve over the multi-part wedge unit,
wherein the sleeve is removed before the plurality of tensioning members are placed in tension.

2 . The method as claimed in claim 1 further comprising removing the pulling tab from the sleeve before the fixing unit is fixed to the segment.

3 . The method as claimed in claim 2 wherein removing the pulling tab comprises using the cable to remove the pulling tab.

4 . The method as claimed in claim 1 wherein second ends of the plurality of tensioning wires are coupled in a region of the foundation.

5 . The method as claimed in claim 1 wherein pulling the cable with the fixing unit and the tensioning member upwardly comprises using a roller system to pull the cable with the fixing unit and the tensioning member upwardly.

Assignees

• Wobben Properties Gmbh

Inventors

• Freese Ewald
• Stracke Olaf

Classifications

• E04H12/16 Primary

  Prestressed structures · CPC title

• E04C5/122

  the tensile members are anchored by wedge-action · CPC title

• E04H12/12

  of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• F03D13/10 Primary

  Assembly of wind motors; Arrangements for erecting wind motors · CPC title