ABSTRACT
Along Lot Mules 2–3 of the Brenner Basis Tunnel the Client BBT choose to improve geological knowledge along the alignment by a pilot tunnel to be excavated contemporarily but in advance to the main twin tubes. BTC (JV from Astaldi-Ghella-Pac-Cogeis) was awarded this project based on a tender where all the three tubes will be excavated using a DS TBM. The management of the data provided by the complex system of investigation and monitoring through the pilot tunnel ahead is a key point of the tunnel construction with the aim (1) to give instruction for the excavation of the pilot tunnel to explore what was never directly investigated and (2) to prepare the “engineered as built profile” of the pilot to use as a guide for the two bigger machines. The paper shows how this system is going to be organized and which parameters and correlations seems to be relevant for the purpose.
