Ground Modelling
Ground Modelling
3D ground modelling provides an essential tool for storing, interpreting and integrating site characterisation data. This enables robust interpretations and conclusions to be made on the seabed and sub-seabed conditions and risks, relevant to the effective planning and development of a site or route.
A ground model typically evolves from a desk study that has been ‘calibrated’ using site-specific geophysical and geotechnical data. The ground model is then updated each time a new survey is performed until a point in time is reached where the site is sufficiently characterised and the risks are well enough understood to enable detailed design and installation of infrastructure. The ground model can be hosted on our interactive online GIS portal for stakeholder access and interrogation.
Building a 3D ground model comprises the cataloguing, review, interpretation and integration of all available site characterisation datasets to provide an up-to-date state of knowledge for the site. The focus of a ground model is often characterising geotechnical conditions, identifying and quantifying risks, and highlighting key uncertainties and data gaps.
A 3D ground model typically comprises the following elements:
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Geological model - to understand how the site evolved and highlight key areas of increased geological complexity and potential risk
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Seismostratigraphic model - to define the seismic units and their stratigraphic relationships.
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Geotechnical model - to provide a predictive model of geotechnical conditions across the site or along the route, typically presented as geotechnical province/zone maps in which similar ground conditions exist, with associated geotechnical parameter information for input to engineering analyses.
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Hazard and constraint assessment - to identify and assess natural and anthropogenic hazards and constraints, either qualitatively or quantitatively
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Data gaps and uncertainties - highlight key data gaps and uncertainties
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Recommendations - details of how to reduce remaining uncertainties and data gaps.
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Report and GIS database
Geo-4D Ground Modelling