Device and method for releasing a stressing strand

Patent metadata

Field	Value
Publication number	US-2022010577-A1
Application number	US-202017427486-A
Country	US
Kind code	A1
Filing date	Feb 4, 2020
Priority date	Feb 4, 2019
Publication date	Jan 13, 2022
Grant date	—

Abstract

An apparatus and a method for relieving a tension strand, in particular a tension strand of a prestressed tower, preferably a prestressed concrete tower of a wind power plant. Furthermore, the disclosure relates to a method for dismantling a prestressed tower and to the use of an apparatus. The apparatus comprises a first anchoring unit with a first tension strand receptacle for a first section of the tension strand, a second anchoring unit with a second tension strand receptacle for a second section of the tension strand, and a lifting unit which is configured to change a spacing between the first and second anchoring unit.

First claim

1 . An apparatus for relieving a tension strand of a prestressed tower of a wind power plant the apparatus comprising:
a first anchoring unit with a first tension strand receptacle for receiving a first section of the tension strand, a second anchoring unit with a second tension strand receptacle for receiving a second section of the tension strand, a lifting unit configured to change a spacing between the first and second anchoring units.

2 . The apparatus as claimed in claim 1 , wherein the lifting unit is configured to increase and/or decrease the spacing between the first and second anchoring units.

3 . The apparatus as claimed in claim 1 , wherein the lifting unit connects the first and second anchoring units and is arranged between the first and second anchoring units.

4 . The apparatus as claimed in claim 1 wherein the lifting unit is a hydraulic cylinder or a spindle lifting mechanism.

5 . The apparatus as claimed in claim 1 wherein at least one of the first anchoring unit or the second anchoring unit is configured in two pieces.

6 . The apparatus as claimed in claim 1 wherein at least one of the first anchoring unit or the second anchoring unit has a first anchor base and a first anchor plate.

7 . The apparatus as claimed in claim 1 wherein at least one of the first anchoring unit and the second anchoring unit has a length, a width, and a depth, the depth being multiple times smaller than the width and/or the length.

8 . The apparatus as claimed in claim 1 wherein at least one of the first anchoring unit or the second anchoring unit has a first clamping unit, the first clamping unit and the second anchoring unit being arranged at least in sections in the first and second tension strand receptacles, respectively.

9 . A method for relieving a tension strand of a prestressed tower of a wind power plant, the method comprising:
arranging a first section of the tension strand in a first tension strand receptacle, and anchoring the first section of the tension strand in a first anchoring unit, arranging a second section of the tension strand in a second tension strand receptacle, and anchoring the second section of the tension strand in a second anchoring unit, and changing a spacing between the first and second anchoring units using a lifting unit.

10 . The method as claimed in claim 9 , wherein changing the spacing between the first and second anchoring units using the lifting unit comprises increasing a spacing of the tension strand with respect to an adjacent tension strand and/or with respect to a tower wall.

11 . The method as claimed in claim 9 , wherein changing the spacing between the first and second anchoring units using the lifting unit comprises decreasing the spacing between the first and second anchoring unit.

12 . The method as claimed in claim 9 , further comprises severing of the tension strand between the first and second anchoring units.

13 . The method as claimed in claim 9 , further increasing the spacing between the first and second anchoring units.

14 . A method for dismantling a prestressed tower of a wind power plant, the method comprising:
relieving of at least one tension strand using the apparatus as claimed in claim 1 ; and removing the at least one tension strand and/or tower segments.

15 . (canceled)

16 . The method as claimed in claim 14 , wherein the at least one tension strand is a plurality of tension strands.

17 . The apparatus as claimed in claim 1 wherein the prestressed tower is a prestressed concrete tower of the wind power plant.

18 . The method as claimed in claim 10 , wherein increasing the spacing of the tension strand comprises using an air cushion.

Assignees

• Wobben Properties Gmbh

Inventors

• Gottschalk Lars

Classifications

• E04H12/16 Primary

  Prestressed structures · CPC title

• F05B2230/70

  Disassembly methods · CPC title

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title

• E04G21/121

  Construction of stressing jacks · CPC title