Bucket foundation
A Bucket -Fundament (Engl. For bucket ) is a foundation type of offshore structures in sedimentary soils ( sand and clay ). It consists of a steel cylinder that is open at the bottom and is placed on the seabed and pumped out. The weight of the water column presses the foundation into the seabed. Water depths of 30 meters or more are sufficient for this. Bucket foundations are quiet and quick to install and can also be removed again using excess pressure.
application
Bucket foundations were introduced into the wind energy industry by the Danish company Marine Business Development (MBD) Offshore Power, founded in 2001 . This company, now Universal Foundation, relies on mono-bucket foundations. A Vestas V90 (3 MW) was erected for the first time in 2002 on such a foundation near the port of Frederikshavn on the northern tip of Jutland .
In the offshore wind farm (OWP) Borkum Riffgrund 1, there has been a Siemens SWT-4.0-120 on a jacket with three suction buckets that are individually controlled during installation. In this way, the vertical alignment can be guaranteed more reliably. Such bucket foundations were used for the first time in large numbers in a wind farm in the OWF Borkum Riffgrund 2 , where they have supported 20 of the 56 Vestas V164-8.0 wind turbines since August 2018 .
Two of the 33 wind turbines in the offshore wind farm Deutsche Bucht will be placed on mono-bucket foundations - for the first time commercial.
Individual evidence
- ↑ Foundations and foundation structures. offshore-windenergie.net, accessed on November 21, 2013 .
- ↑ Universal Foundation: About Us. Retrieved Oct. 24, 2018.
- ↑ Universal Foundation: Case Study: Frederikshavn. Retrieved Oct. 24, 2018.
- ↑ Three offshore concepts for the future . Renewable energies, April 2014.
- ↑ DONG, NGI install suction anchor at Borkum Riffgrund 2. Offshore Engineer, July 1, 2016.
- ↑ Testing of mono-bucket foundations in commercial operation . In: Schiff & Hafen , issue 10/2018, p. 42