Rennberg tunnel
| Rennberg tunnel | ||||
|---|---|---|---|---|
 North portal November 2017
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| place | Grub am Forst | |||
| length | 1072 m | |||
| Number of tubes | 1 | |||
| construction | ||||
| Client | DB Netz AG | |||
| start of building | 2010 | |||
| completion | 2013 | |||
| business | ||||
| release | December 2017 | |||
| North portal 2017 | ||||
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| location | ||||
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| Coordinates | ||||
| North portal | 50 ° 14 ′ 33 " N , 11 ° 0 ′ 43" E | |||
| South portal | 50 ° 13 ′ 59 ″ N , 11 ° 0 ′ 21 ″ E | |||
Map with all coordinates: The Rennberg tunnel near Grub am Forst in the Bavarian district of Coburg is a 1072 meter long tunnel on the new Ebensfeld – Erfurt line between the route kilometers 102.638 and 103.710.
Geographical location
The tunnel passes under the north-west of Grub am Forst located Rennberg (about 351 m ) and further northeast subsequent surveys of Pöhlholzes, the small Ketschenbach inflow Heinleinsgraben and a town road between Grub am Forst and silk Claus Village . The district town of Coburg is around 4 km (as the crow flies ) northwest of the center of the tunnel.
History and description
The 25 million euro tube is part of construction section 3121 ( Coburg Ost ) of the new line, which lies between construction kilometers 19.130 and 24.895 and also includes the Feuerfelsen tunnel , the Kiengrund bridge and three overpass structures, as well as the earthworks on the open line. The longitudinal slope of the tunnel is 20 per thousand with a maximum overburden of 40 m in the north-northeast.
The award package to the working group Tunnel Feuerfelsen / Rennberg had an order value of 82 million euros. The four bridge structures were subcontracted for 5.9 million euros. Construction began in autumn 2010 and the planned completion was in 2013.
The tunnel was opened on July 7, 2011 struck . The tunnel sponsorship was taken over by Barbara Stamm , President of the Bavarian State Parliament . The technical breakthrough at the north portal followed at the end of March 2012. This was officially celebrated on the third from last tube on the new line on April 18th.
Construction work
The tunnel runs in rock formations of the Lower and Middle Burgsandsteins as well as in the Coburg and Blasensandstein of the Middle Keuper . It was driven mechanically with a tunnel excavator and with explosions from the southern portal. The cross-section was divided into a dome, bench and bottom and secured with a shotcrete lining according to the new Austrian tunnel construction method. The tunnel excavation totaled approximately 252,000 m³ and was deposited at the Pöhlholz landfill ( 50 ° 14 ′ 2 ″ N , 11 ° 0 ′ 2 ″ E ), northwest of the south portal. The inner tunnel shell was made starting from the north portal.
The construction site's concrete mixing plant was at the south portal of the Feuerfelsen tunnel. Therefore, while the tunnel was being driven, the shotcrete was delivered around the clock via public roads through the towns of Rohrbach and Grub am Forst. The transports led to a strain on the population and damage to the roads.
Rescue concept
The tunnel has emergency exits at route kilometers 103.138 and 103.210, which are connected to a rescue area via an accessible stairwell.
Photos of construction stages
South portal August 2011
North portal August 2012
Rescue shaft 50 ° 14 ′ 16 ″ N , 11 ° 0 ′ 31 ″ E
South portal August 2013
North portal August 2013
Web links
- Brochure on the construction phase ( Memento from August 31, 2012 in the Internet Archive ) on vde8.de (PDF; 853 kB)
- Pictures of the construction on bastellen-doku.info
Individual evidence
- ↑ a b Schüßler plan: Route brochure for the new VDE 8.1 line from Breitengüßbach to Erfurt. Published by DB Netz AG Regional Area Southeast. As of June 1, 2017. p. 147 ( page no longer available , search in web archives )
- ↑ Berthold Köhler: New ICE line: breakthrough in Rennberg! . In: Coburger Tageblatt , April 19, 2012.
- ↑ Marti Tunnelbau AG, project description ( Memento from May 17, 2011 in the Internet Archive ) (PDF; 2.5 MB)
- ^ A b Deutsche Bahn AG (ed.): Breakthrough of the Rennberg tunnel in Franconia - final spurt in mining work in the Nuremberg-Berlin project . Press release from April 18, 2012.
- ^ Light at the end of the tunnel , in: Neue Presse Coburg, September 14, 2011.