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In October 2023, Bauer completed the execution of deep foundations for the Saint-Brieuc offshore windfarm 16 km off the coast north of Brittany, France. Once operational, the 496-MW windfarm will generate enough clean energy for 835,000 inhabitants. Ailes Marines, owned by Iberdrola, contracted Van Oord to transport and install 62 wind turbines based on triple-jackets and an offshore substation based on a four-pile jacket. Bauer was deployed for the geotechnical solution to drill a total of 190 shafts and grout the same number of piles to support the jackets. Bauer carried out the work from Van Oord’s offshore installation vessel “Aeolus.” The Atlantic environmental conditions combined with the extremely hard and rocky seabed and the high demands on geometric tolerances and other key quality indicators presented a variety of challenges for the contractor’s expertise and equipment. The paper shows the planning, execution, and special geotechnical solutions to fulfill the client’s requirements.

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Deep Foundations for an Offshore Windfarm—A Challenge Not Only to Dive Drill from Seabed

  • 会议论文

  • 发表日期：

    2025年

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  • Karsten Beckhaus,
  • Andreas Stimpfle,
  • Rabea Barhum,
  • Onur Askin,
  • Harald Heinzelmann

摘要

In October 2023, Bauer completed the execution of deep foundations for the Saint-Brieuc offshore windfarm 16 km off the coast north of Brittany, France. Once operational, the 496-MW windfarm will generate enough clean energy for 835,000 inhabitants. Ailes Marines, owned by Iberdrola, contracted Van Oord to transport and install 62 wind turbines based on triple-jackets and an offshore substation based on a four-pile jacket. Bauer was deployed for the geotechnical solution to drill a total of 190 shafts and grout the same number of piles to support the jackets. Bauer carried out the work from Van Oord’s offshore installation vessel “Aeolus.” The Atlantic environmental conditions combined with the extremely hard and rocky seabed and the high demands on geometric tolerances and other key quality indicators presented a variety of challenges for the contractor’s expertise and equipment. The paper shows the planning, execution, and special geotechnical solutions to fulfill the client’s requirements.