A semi-quantitative geotechnical visualization tool for ground engineering projects

This paper presents a technique for the visualization and semi-quantification of various ground engineering criteria, in the form of a spider graph. There are currently few techniques for effectively presenting multiple ground engineering and engineering complexity criteria in a single graphic. The technique described proposes a tool that can do so for technical and non-technical audiences alike. The input criteria can be adapted to suit any project in soil, rock or a combination of both. The methodology and example presented is for a current Jacobs’ rock engineering project. The geotechnical parameters used include unconfined compressive strength, Geological Strength Index, in situ stress and groundwater head. Engineering complexity is also considered and an additional criterion to allow for significant influences not accounted for in the other criteria. The input criteria must be set at the beginning of the project to ensure that comparisons can be made both between terrains (areas with similar ground engineering characteristics) and throughout the life cycle of a project. The tool aims to communicate ground conditions and potential ‘ground risk’ with the usefulness of the tool being its simplicity and adaptability to meet the project needs at all stages of the project. A preliminary version of an ‘ app ’ is available to trial the tool.