Offshore and Herrenknecht have signed an agreement for the fabrication
of a subsea drill to be deployed at the Saint-Nazaire
offshore wind farm in France. This is the first wind farm in the world
to use drilled XL-monopile foundations.
In 2019, a consortium including DEME Offshore and Eiffage Métal was awarded
an Engineering, Procurement, Construction, Installation (EPCI) contract
for 80 foundations for the French wind farm. The scope includes the design,
fabrication, transportation and installation of the steel foundations.
The XL-monopile foundations have to be installed on a rocky seabed. DEME
Offshore and Herrenknecht are fabricating an innovative tailormade subsea
drill specifically for the project. The subsea drill will be deployed from
DEME Offshore’s installation vessel Innovation.
“Installing drilled XL-monopiles is a new step forward in the offshore
wind industry,” says Bart De Poorter, General Manager DEME Offshore.
“With this innovative solution, developed in partnership with Herrenknecht,
we ensure that the installation is performed safely and efficiently in
challenging marine conditions.”
“The Offshore Foundation Drilling (OFD) enables mechanised installation
of monopiles, thus providing ecological and economic advantages compared
to conventional methods”, says Ulrich Schaffhauser, Member of the
Board of Management of Herrenknecht AG. “We are proud, that DEME relies
on Herrenknecht’s solution, expertise and know-how in the field of excavation
technology. The project teams of DEME and Herrenknecht cooperated very
well, now we all are looking forward to project realisation.”
The 480 MW Saint-Nazaire
offshore wind farm will be located between 12 km and 20 km off the coast
of the Guerande peninsula in western France. Water depths at the site range
between 12 and 25 metres. The project is expected to generate enough electricity
to supply 20% of the Loire-Atlantique department's power.
It being developed
by Eolien Maritime France (EMF), a project company co-owned by EDF Energies
Nouvelles Group and Enbridge.
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