Wikinger Offshore Wind Farm
GCG provided independent advice, technical design and tender review as well as optimisation for the large scale offshore pile testing campaign. This work was completed together with Prof Richard Jardine who is a leading expert in offshore geotechnics and pile design and a long standing Associate of GCG. The results from the pile testing led to significant economies in the pile design. Direct benefits included an aggregate reduction in pile length of around 3 km which led to large savings in material, fabrication, installation and CO2 emission costs. Considering also the numerous indirect benefits, the gains from the pile testing campaign greatly outweighed its costs.
In further phases of work, GCG was retained to undertake independent analysis of the field Dynamic Load Testing (DLT) using wave matching techniques to quantify the pile capacity with a number of methods, including advanced methods more commonly employed in research.
The pile testing was critical to obtain Innovate UK funding for a 3 year Joint Industry Program between Scottish Power, Imperial College London and GCG to improve pile design methods in Chalk. This work is being continued by the Engineering and Physical Sciences Research Council (EPSRC) funded ALPACA project, with broad industry support, for which GCG is providing some funds and is represented on the Steering Committee.
References
Barbosa, P., Geduhn, M., Jardine, R.J. & Schroeder, F.C. (2017). Large scale offshore static pile tests – practicality and benefits. 8th Int. Conf. on Offshore Site Investigation and Geotechnics – OSIG 8
Buckley, R. M., Kontoe, S., Jardine, R. J., Maron, M., Schroeder, F. C. & Barbosa, P. (2017). Common pitfalls of pile driving resistance analysis – a case study of the Wikinger Offshore Windfarm. 8th Int. Conf. on Offshore Site Investigation and Geotechnics – OSIG 8
Barbosa, P., Geduhn, M., Jardine, R.J., Schroeder, F.C. & Horn, M. (2015). Full scale offshore verification of axial pile design in chalk. Proc. Int. Symp. Frontiers in Offshore Geotechnics – ISFOG 2015, Oslo (Ed. V. Meyer)
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