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The 32.9 km long Koralm tunnel (Austria) is the core piece of the Koralm railway and will be one of the longest railway tunnels worldwide after completion. At the longest construction section ”KAT2“ two approx. 17 km long parallel single‐track tunnels were driven by two double‐shield tunnel boring machines with a diameter of about 10 m. Accompanying the tunnelling of the two tubes, the continuous...
On contract KAT2 at the 33 km long Koralm Tunnel, two hard rock double shield TBMs are currently boring a total distance of about 17 km each through the Koralm crystalline. Due to the forecast ground conditions, particularly localised fault zones and aquiferous areas, systematic exploration is being undertaken to provide continuous prediction of ground conditions. The intention is only ever to bore...
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