Abstract
AbstractFor over 25 years, the AT Pipe Umbrella System has been used to cope a wide variety of challenges such as fractured rock, fault zones, loose rock, slope debris areas or backfill, thus enabling safe and efficient tunnelling. The first application in 1998 in the Sieberg Tunnel – a 6.48 km long tunnel on the Vienna‐Salzburg high‐speed railway line – was a complete success and the starting point for a long‐lasting success story. (Source: DSI Underground)
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