ABSTRACT
The Cone Penetration Test (CPT) is one of the most popular in-situ testing methods used in qualitative and quantitative research of characteristics of the subsurface sediments, both onshore and offshore. In offshore cable route surveys, CPT tests are often accompanied by VibroCoring (VC) boreholes. The article endeavours to verify whether there is a clear correlation between the relative density of cohesion-less soils and the VC penetration characteristics. The research has been based on an offshore site investigation campaign in the North Sea consisting of over 100 CPTs and VCs, supplemented by an extensive laboratory testing program. After a strict selection of locations, around one-fifth of those tests have been utilised in the correlation studies. The ultimate goal of this study was to demonstrate if processing data recorded during VC testing can increase certainty in the prediction of soil’s strength parameters.
