Ryder perform full geotechnical appraisals of jack up sites.
Geohazard assessment
Spudcan penetration and extraction assessment
Stability analysis
Consideration has been given to recent advancements in the assessment of spudcan leg penetration after published research using advanced centrifuge and numerical modelling
The assessment uses the load spread method which determines the bearing capacity at depths below the spudcan, limited by the punch through potential of underlying soils
Carried out using JUPA, in-house propriety software written in accordance with ISO 19905-1:2016
Numerous risks are considered as part of the assessment:
Scour
Historical penetrations
Bathymetry
Data suitability
Partial penetration
Punch through
Hang up
Scour induced punch through
Extraction
With recommendations on mitigation measures as required:
Alternate location
Reduction in Preload
Operate in weather restricted mode with ‘cut and run’ approach
