Client: VSF (Volker Staal en Funderingen)
Main Contractor: Scaldis SMC
Location: Thor Offshore Wind Farm, Danish North Sea
Project Summary:
In the summer of 2025, GeoDrive supported the installation of the Thor Offshore Wind Farm jacket by performing pile monitoring on all four foundation piles. Each pile was equipped with our underwater sensor sets. Monitoring was carried out from Scaldis’ heavy lift vessel Gulliver, under contract with VSF (Volker Staal en Funderingen), who was responsible for the pile driving scope.
Scope of Work:
Ahead of offshore operations, our team pre-installed all sensors on the four jacket piles at the HSM Offshore Energy yard in Rotterdam. During offshore pile driving in the Danish North Sea, we closely monitored the piles for signs of irregularities, with a particular focus on compression stress indicators that could point to boulder impacts. Our underwater sensor systems enabled high-resolution, real-time assessment of pile behavior during driving.
Following installation, GeoDrive performed post-installation CAPWAP analyses on all four piles to establish their bearing capacity. These results provided vital input for evaluating the integrity of the foundation.
Project Highlights:
• Pre-installation of sensors at the HSM Offshore Energy yard
• Real-time offshore pile monitoring with boulder detection focus
• CAPWAP analyses to establish bearing capacity of all four piles
• Executed from the Gulliver in the Danish North Sea
• Contribution to Denmark’s largest offshore wind project to date
Conclusion:
With this scope of work, GeoDrive contributed to the safe and efficient installation of the Thor Offshore Wind Farm Jacket foundation. Our monitoring and analyses ensured reliable data for assessing pile performance and capacity, supporting the successful realization of Denmark’s largest offshore wind project to date.
