RLT on prefab concrete piles of wind turbine foundations in tidal sands in the Netherlands

During pile driving for wind turbine foundations in pre-dominantly tidal sands, unexpected low blow counts as low as one blow per 0.25 m were observed. To restore confidence in the foundation various aspects were investigated. Within the scope of this investigation several rapid load tests (RLT) have been executed in accordance with NPR7201:2017 and ISO22477-10:2016. From these tests it was concluded that the pile bearing capacity was sufficient. The maximum applied test loads, without geotechnical failure occurring, exceeded the maximum pile bearing capacity predicted by the calculation metho... Mehr ...