ABSTRACT
The construction of the Tulfes Pfons lot, as part of the Brenner Base Tunnel (BBT), includes a 15 km long tunnel section excavated with an open gripper TBM. Due to the very difficult logistical conditions (steep access tunnel with a downward gradient of 11 %, a 90° turn to the main tubes with a small cross-section of 8 m diameter), an alternative TBM logistical supply solution was developed in collaboration with the contractor. Multi Service Vehicle (MSV) is a laser-controlled custom vehicle on rubber tires that can operate without rails. The MSV is able to handle both the steep access (11 %) and the 90° turn. In addition to the safety-related advantages, it was proven that the MSV system can keep pace with conventional TBM supply systems. After 12 km of excavated tunnel with a top performance of 61 m/day and monthly performances of up to 800 m/month in hard rock conditions with up to 1200 m overburden, it was clear that the use of the MSV has been a complete success. MSVs are becoming a cost efficient and technically approved alternative to conventional TBM supply equipment on rail.
