Project control by using the NTNU model methodology: The new Ulriken Tunnel
The Tunnel Boring Machine (TBM) method has become a widely used method for hard rock tunnelling. The use of TBMs involves major investments and high levels of geological risk, furthermore, the method requires accurate predictions of TBM performance and costs in order to facilitate the control of risk and enable projects to avoid delays and budget overruns. During tunnel excavation, a detailed follow up of the TBM performances through laboratory testing, geological mapping and TBM data is required. The NTNU model methodology can be a practical and reliable tool for execution control avoiding tedious and costly disputes. The paper describes the applicability of the NTNU model methodology used for project management for parties, client and contractor, in a running TBM tunnel: The New Ulriken Tunnel.