Abstract
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.
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.
| Titel in Übersetzung | Semmering Base Tunnel - Keeping shafts free of ice through the example of the Fröschnitz 2 supply shaft: Keeping Shafts free of Ice through the Example of the Fröschnitz 2 Supply Shaft |
|---|---|
| Originalsprache | mehrere Sprachen |
| Seiten (von - bis) | 631-638 |
| Fachzeitschrift | Geomechanics and Tunnelling |
| Jahrgang | 2019 |
| Ausgabenummer | 6 |
| DOIs | |
| Publikationsstatus | Veröffentlicht - 25 Nov. 2019 |
| Veranstaltung | ATC2 -Symposium - Technische Universität Graz, Graz, Österreich Dauer: 29 Nov. 2019 → 29 Nov. 2019 http://austrian-tunnel-competence-center.at/ |
Schlagwörter
- Strömungsmechanik
- Wärmelehre
- Eisbildung
- Schacht
ASJC Scopus subject areas
- Geotechnik und Ingenieurgeologie
- Maschinenbau
Fields of Expertise
- Mobility & Production
Treatment code (Nähere Zuordnung)
- Application