A consortium led by Porr has won an €966m (£842M) design and build contract for an 18km section of the Brenner Base Tunnel in Austria.
Porr, together with Hinteregger, a subsidiary acquired last year, and joint venture partners from Italy, has secured the largest tunnelling project in the history of Austria – lot H51 Pfons-Brenner.
The construction phase for lot H51 involves building two main tunnel tubes between Pfons and Brenner, around 9km of exploratory shafts, and the emergency stop and transfer point at St Jodok.
The two main, single-track tunnel tubes will primarily be driven with TBMs with an excavation diameter of 10.37m, at a rate of 30m a day per TBM. The excavation of the exploratory shafts will be realised with the drill and blast method and secured with shotcrete. The entire project will be supplied via a single access shaft.
Porr CEO Karl-Heinz Strauss said: “To be charged with building the largest tunnelling project in Austria is a sign of how highly valued our expertise is. The scope of the project, the changeable geological conditions and the limited space constraints of the construction site all represent considerable challenges.
On highly demanding, large-scale projects such as the “Green Line” metro in Doha, we have proven that we are capable of mastering exceptionally complex tasks within the promised time and quality – and on budget. This certainly worked in our favour in the award process for the Brenner Base Tunnel.”
Porr’s tunnelling experience includes driving more than 600km of tunnels and the firm has already built multiple exploratory and access tunnels for the Brenner Base Tunnel.
Work will begin in early thi summer, with completion planned for 2024.
The consortium members are Porr Bau, G Hinteregger & Söhne Baugesellschaft, Società Italiana per Condotte d’Acqua and Itinera.