ABSTRACT
Digital ground models have been used in planning and construction for extending Vienna’s metro network for more than10 years. This contribution presents methodology and applications through several project phases and reflects the progressive development of digital methods: Starting in 2011 as an innovative tool used by designers for particular difficult situations, the ground models were appreciated by geotechnical site supervision for efficient comparison of expected vs. encountered conditions. Based on this experience, a comprehensive ground model was developed for subsequent extension projects, covering significant parts of the city and taking advantage of the tremendous archive of borehole data hosted by the municipality of Vienna. Advancing technical possibilities and dynamic development of the model requirements (e.g. upcoming BIM-method) required continuous re-adjustment of workflows and model specifications. This experience allowed the municipality to efficiently apply digital ground models as a standard tool for urban planning.
