Offshore foundations play a critical role in the energy transition as they are providing the necessary stability and stiffness to offshore wind turbine structures. The geotechnical design process is however still highly empirical and soil mechanical behaviour is often greatly simplified in the methods used in codes and standards. Field validation of the design methods on full-scale structures is often missing.

An improved soil mechanical characterisation of offshore soils is required to achieve a better understanding of their complex non-linear response to loads of varying intensity. In this research, laboratory measurements of the stress-strain relations of offshore soils will be linked to in-situ monitoring data collected on full-scale offshore structures to provide validated geotechnical design framework. The laboratory measurements will be collected from available data source and additional tests will be performed on equipment purchased as part of this project.