Control of screw pile installation to optimise performance for offshore energy applications

Screw piles can be used as foundations for offshore energy applications, thanks to their silent mode of installation and considerable uplift capacity, although a significant upscaling onshore dimensions is necessary. However, the crowd (vertical) force necessary install upscaled screw was previously shown far too great practical installation. Although guidance recommends that pile's vertical displacement must one helix pitch (helix height) per each pile revolution, it in this paper lower revolution significantly reduce during or even generate some pull-in. In addition, stiffness capacity were enhanced by process, at shallow (relative) depth sand. This gathers 19 centrifuge tests, with varying geometries (shaft diameter, base shape), sand relative density advancement rates. A predictive framework pull-in potential given geometry proposed assess its ability installed reduced force.