Switzerland – Railway tunnel construction work – St. Moritz – Tirano, partial renovation of the Puntalta Tunnel, km 33,786 – km 33,832, construction work
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Description & Project Overview
The 46 m long, single-lane Puntalta Tunnel is located on the Cavaglia - Cadera section of the Rhaetian Railway. It is to be renovated according to the “standard construction method for the Bernina/Arosa Tunnel (NBW BA)” and designed for a service life of 80 to 100 years. * Main quantities: * Rock excavation / profile expansion: 420 m3 * Sole/drainage excavation: 270 m3 * Sole concrete: 105 m3 * Breakout protection made of shotcrete 130 m3 * Interior cladding made of shotcrete: 150 m3 * Reinforcement: 10 tons * Cable pipe blocks (in-situ concrete): 350 m1 * Mountain waterproofing: 450 m2 * Drainage / seepage pipe: 300 m1
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