The Semmering Base Tunnel is a 27.3-kilometer-long railway tunnel under construction since 2012, which traverses the northern Alpine chain between Gloggnitz in Lower Austria and Mürzzuschlag in Styria. It is intended to reduce the travel time between Gloggnitz and Mürzzuschlag for express trains by about 30 minutes from the current 45 to about 15 minutes.
The two tubes run at a centre distance of 40 to 70 m and are interconnected by several cross passages. The tunnel is constructed in the mountain area with extremely difficult geological conditions with high overburden.
Among several other tasks iC also performed FE calculations for the Göstritz portal, some cavern systems and several cross passages. We were also responsible for the reinforcement plans for the inner lining of the central part of the tunnel, where an emergency station with ventilation shafts is planned, full of complex sections where the two main tunnel tubes are connected by caverns, crossbars and recesses. Due to the scale of the project, much of the design work was carried out in parallel with construction.
Project typeNew construction, construction engineering: two-pipe railway tunnelLocationSouthern Railway, Baltic-Adriatic axis, AustriaSection length27,300 mArea42.7 m² (excavation area)Inv. value€3.900.000.000Year(s)2012-ServicesMKE, support during construction, reinforcement plans, 3D modelingInvestorÖBB
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