Spital am Semmering, Drilling the blast holes at Semmering-Basistunnel (Semmering Base Tunnel) of Semmeringbahn (Semmering railway) under construction by a consortium of company Implenia and Swietelsky, client ÖBB (Austrian Federal Railways), site Fröschnitzgraben, New Austrian tunneling method (NATM), also known as sequential excavation method (SEM) in Hochsteiermark, Steiermark, Styria, Austria

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Photo credit: © Volker Preusser / Alamy / Afripics
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Keywords: austrian, fröschnitzgraben, method, site, tunneling