Rock tunnel
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Rock tunnel Etterzhausen rock gate
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 The rock gate in April 2010
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| traffic connection | Railway line Nuremberg – Regensburg | |||
| place | Etterzhausen | |||
| Number of tubes | 1 | |||
| construction | ||||
| start of building | 1869 | |||
| completion | 1870 | |||
| business | ||||
| operator | DB network | |||
| release | 1873 | |||
| closure | May 31, 2010 | |||
| location | ||||
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| Coordinates | ||||
| 49 ° 1 ′ 18 ″ N , 11 ° 59 ′ 39 ″ E | ||||
| 49 ° 1 ′ 18 ″ N , 11 ° 59 ′ 39 ″ E | ||||
Map with all coordinates: The Felstortunnel , often also called Felsentor von Etterzhausen , was a railway tunnel on the Nuremberg – Regensburg railway near Etterzhausen . With a length of 16 meters, it was considered Germany's shortest railway tunnel. (At 18 meters, the shortest structure in the DB network is currently the Glaträger-Tunnel III near Hornberg on the Black Forest Railway .) The Felstortunnel was located in a nature reserve and crossed under an approximately 20-meter-high rock ridge.
history
The tunnel was built in 1869 and 1870 and put into operation in 1873 with the Nuremberg – Regensburg railway line. The first renovation of the tunnel took place around 1970. A non-load-bearing shotcrete cladding was installed to secure the rock. In 1990, safety anchors and measuring devices were installed for constant monitoring of the tunnel. According to Deutsche Bahn, the maintenance of the tunnel last cost around 25,000 euros per year.
The tunnel was blown up on May 31, 2010. According to DB Netz AG, the reasons were the poor condition of the rock and the high costs for the protection. In the course of the blast, 11,000 tons of rock were loosened. The safety zone set up for the measure encompassed a radius of 800 meters. Preparations for the explosion, during which around 240 boreholes were drilled to a depth of up to 36 meters, began in early May 2010. About 1.7 tons of explosives were used. Due to the poor road connection, a large part of the rock debris was not removed, but left at the foot of the slope or piled up to form a wall.
When the tunnel was being built, a cave had already been discovered, in which archaeologists were able to recover numerous finds from the Stone Age in 1911 . More recent excavations shortly before the demolition brought several hundred new finds to light. The cave was then closed and secured again to protect it from being destroyed by the blast.
literature
- Marc Dahlbeck: Railway tunnel. Underground architecture . Stuttgart 2013, ISBN 978-3-613-71456-4 , p. 24f.
- NN: Blasting the Felstor tunnel - rock construction with challenging boundary conditions to restore operational safety on the DB route Regensburg - Nuremberg. In: Felsbau magazine. Issue 1/2011, pp. 68-78.
Web links
- Felstortunnel at eisenbahn-tunnelportale.de
Individual evidence
- ↑ a b c DB Mobility Logistics AG (Ed.): Etterzhausen: Germany's shortest tunnel is being removed . Press release from May 28, 2010.
- ↑ a b c Etterzhausen: Shortest tunnel is blasted , Mittelbayerische Zeitung, May 27, 2010.
- ↑ Explosion ( page no longer accessible , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. , br-online, May 31, 2010.
- ↑ Shortest railway tunnel before blasting ( memento of the original from September 21, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , Franken TV
- ^ Nuremberg-Regensburg railway line closed , Nürnberger Nachrichten, May 4, 2010.
