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Abstract: The Koralm Tunnel, a twin-tube single-track railway tunnel with an overall length of almost 33 km and a maximum overburden of over 1.200 m, closes the most significant gap of the future high-capacity railway line from Graz to Klagenfurt, Austria. Located close to the tunnel center, an emergency stop will provide the facilities for future travelers to be evacuated to safety in case of an...