Semmering-Basistunnel - Eisfreihaltung von Schächten am Beispiel des Versorgungsschachtes Fröschnitz 2

Translated title of the contribution: Semmering Base Tunnel: Keeping Shafts free of Ice through the Example of the Fröschnitz 2 Supply Shaft

Research output: Contribution to journalArticlepeer-review


The Fröschnitz 1 and Fröschnitz 2 supply shafts of the Semmering
Base Tunnel are used for the ventilation of the tunnel drives,
transport of personnel, materials and machinery and as escape
and rescue routes. Until the final completion of the concrete inner
lining in the shafts, water still emerges repeatedly at the surface
at a few locations of the shotcrete support layer. This led above
all for the Fröschnitz 2 shaft to ice formation during longer periods
with outside air temperatures below the freezing point of water
with simultaneous operation of the fresh air supply. The effectiveness
of warm air supply was investigated with thermodynamic
and aerodynamic investigations and then the cost-effectiveness
of two selected systems to provide warm air were considered.
The aerodynamic simulations showed that in particular the entry
angle of the warm fresh air flow is decisive for the magnitude of
the warm air losses.
Translated title of the contributionSemmering Base Tunnel: Keeping Shafts free of Ice through the Example of the Fröschnitz 2 Supply Shaft
Original languageMultiple languages
Pages (from-to)631-638
JournalGeomechanics and Tunnelling
Issue number6
Publication statusPublished - 25 Nov 2019
EventATC2 -Symposium - Technische Universität Graz, Graz, Austria
Duration: 29 Nov 201929 Nov 2019


  • Semmering Base Tunnel
  • Geotechnical engineering
  • Tunnel ventilation

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering

Fields of Expertise

  • Mobility & Production

Treatment code (Nähere Zuordnung)

  • Application

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