foundation grouting dudgeon masterflow basf foundocean
The Dudgeon Offshore Wind Farm is an exciting £1.5 billion project being developed to harness offshore wind to power more than 410,000 UK homes. This 402MW offshore wind farm will be located some 20 miles off the coast of the seaside town of Cromer in North Norfolk.
The planned operational lifetime of the wind farm is 25 years and as their name suggests, the foundations are one part of the development which are expected to remain solid throughout the project’s lifetime. Even onshore this would be some undertaking, particularly when one considers the dynamic loads produced by these incredible energy generating giants.
Now take the challenge offshore and it becomes understandable why Seaway Heavy Lifting, who is responsible for the transportation and installation of 67 foundations and 1 substation as part of the Dudgeon Offshore Wind Farm project, took the decision to engage a subcontractor who could be trusted to connect the two largest, and most important, components of the foundation. After all, over the next quarter of a century the foundations are required to withstand everything that the North Sea environment can throw at them, so it was vitally important that Seaway Heavy Lifting, the designers and the developers alike, were more than comfortable with the proposed material, that would be used to make that connection, and that the connection would be completed under tight quality assurance controls, safely and efficiently.
Enter FoundOcean and BASF. The duo have been hard at work since 2010, and their close collaboration has meant that FoundOcean has been able to continue its long tradition, dating back to when it was part of the Wimpey Construction Group in the 1960’s, of delivering reliable and safe solutions to the offshore construction sector.
It was one such solution that ultimately met their client’s expectations. The BASF material MasterFlow 9500. It not only addressed the longterm durability requirements of the project but also the necessary properties that are vital during the early construction phases.
The effects of early age cycling on a cementitious material have long been recognised as a precursor to an increased probability of later problems; problems which ultimately could compromise a system’s structural integrity. So ensuring a reliable, consistent and rapid strength build-up, even at freezing temperatures, is a critical aspect during the early phases of connecting the Transition Piece to the Monopile. Yet curing is only one part of the story, so too is the volume stability of the material. Again well documented research states that autogenous shrinkage is particularly prevalent in ultra-high strength materials, the very same materials which are used in such connections. The effects of this type of shrinkage is dramatic and in extreme cases can cause cracking and surface de-bonding, so the choice of MasterFlow 9500, which guards against all these phenomena, starts to become clear.
For a while connecting a Transition Piece and Monopile with grout became a difficult subject for the industry, but this has now become a subject of the past. Design changes and material improvements, along with tighter offshore QA controls, on the material’s placement, has once again restored confidence in this type of connection. Although FoundOcean and BASF have been at the forefront of restoring this confidence, through the introduction of technically superior products and services, they promise that their story will not stop there, as both parties continue their commitment to the research and development of their ideas and experience to improve construction productivity and safety.
FoundOcean expect to begin operations during spring of this year
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Notes to editors
FoundOcean boasts 50 years’ experience of providing green and brown field services for the offshore energy construction industry. It specialises in securing the foundations of oil and gas platforms and offshore wind turbines, as well as life extension solutions and rehabilitation services for offshore assets around the world.
FoundOcean is a progressive company that builds strategic alliances to promote innovation that sets the standard for service delivery and product offering. Its experience, professionalism and energy is complimented by an absolute commitment to quality and safety.
FoundOcean is a FoundOcean Group company, a UK-headquartered Group with offices and specialist grouting and piling equipment located for rapid deployment in Europe, the Gulf of Mexico, South East Asia, India and the Middle East.
Learn more about the FoundOcean Ltd at www.foundocean.com