The Carbon Trust has published the Offshore Wind Accelerator (OWA) Suction Installed Caisson (also known as suction pile) Foundation Design Guidelines, to increase industry confidence in the use of suction caissons. This important document brings together the latest understanding and research to provide clarity and guidance for engineers looking to design suction caissons for foundations in offshore wind.
Suction installed caissons have seen increased acceptance in the offshore wind industry due to their potential for low-noise and quick installation, and suitability to certain challenging soil conditions, which enables them to compete on a commercial basis with traditional monopile and jacket designs.
The OWA has been instrumental in the commercialisation of suction installed caissons with SPT Offshore’s Suction Pile Jackets. Subsequent OWA projects then demonstrated their viability and application offshore, as suitable foundations for met masts and a full-scale turbine. Now, suction installed caissons can be seen supporting the latest generation of 8.8MW turbines at Vattenfall’s European Offshore Deployment Centre in Scotland and Ørsted’s Borkum Riffgrund 2 in Germany.
The guidelines were written on behalf of the OWA by an expert author team, led by geotechnical consultancy Cathie Associates and consisting of subject matter experts from the University of Oxford and SPT Offshore.
The Guidelines are available for download here.