US 12,435,482 B2
Wind turbine foundation structure, and method for producing a wind turbine foundation structure
Daniel Bartminn, Elmshorn (DE)
Appl. No. 17/756,912
Filed by Daniel Bartminn, Elmshorn (DE)
PCT Filed Nov. 20, 2020, PCT No. PCT/EP2020/082862
§ 371(c)(1), (2) Date Jun. 6, 2022,
PCT Pub. No. WO2021/110436, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 10 2019 133 132.3 (DE), filed on Dec. 5, 2019.
Prior Publication US 2023/0010802 A1, Jan. 12, 2023
Int. Cl. E02D 27/42 (2006.01); E02B 17/02 (2006.01); E04G 13/02 (2006.01); E04H 12/34 (2006.01)
CPC E02D 27/425 (2013.01) 3 Claims
OG exemplary drawing
 
1. A method of manufacturing a wind turbine foundation structure, the method comprising:
building up a formwork on-shore, wherein an annular gap in the formwork tapers from a first end towards a second end, the annular gap being larger at the first end than the second end,
pouring concrete into the annular gap in the formwork, wherein when the concrete is poured, the first end of the formwork is on a bottom side and the second end of the formwork is on a top side,
curing the concrete such that the cured concrete forms a hollow structural element with a wall thickness having a taper resulting from the taper of the annular gap in the formwork, the hollow structural element having a first end face and a second end face, the first end face being cured adjacent to the first end of the formwork and the second end face being cured adjacent to the second end of the formwork,
rotating the hollow structural element by 180° such that the second end face is on the bottom side and the first end face is on the top side,
shipping the hollow structural element to an offshore installation site, and
ramming or vibrating the hollow structural element with the second end face, as seen in an installed condition, into a seabed at the installation site.