Research & Development
Project
Geophysical surveys for the seabed characterisation of offshore renewable energy sites
Competitiveness, and therefore cost reduction, are hot topics for offshore wind energy players. In this context, preliminary geotechnical studies are particularly concerned because they are very expensive. They are crucial for the design of wind turbine foundations as they allow the mechanics of the seabed to be characterised. However, this type of study requires campaigns at sea with the deployment of coring machines to take soil samples which are then analysed in the laboratory. It is therefore necessary to develop alternatives to the sole use of geotechnics.
GEOSISMEM carried out a geophysical eabed characterisation of the Calvados offshore wind farm and the Groix & Belle-Île floating wind farm using non-conventional methods. This was compared with the geotechnical characterisation carried out by the wind farm developers prior to the projects. The data sets from both approaches were used to carry out a pile design test. The acquisition of more consistent data would make it possible to consolidate this promising approach.
This project was led by Université de Bretagne Occidentale and France Energies Marines.
This project received French State funding managed by the National Research Agency under the Investments for the Future Programme (ANR-10-IEED-0006-27).
This project was certified by the maritime clusters Pôle Mer Bretagne Atlantique and Pôle Mer Méditerranée.
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