West portal of the Krähberg tunnel
|place||Oberzent , Hesse|
|Number of tubes||1|
|building-costs||2.07 million Mk|
|start of building||October 16, 1879|
|completion||February 22, 1882|
|release||May 27, 1882|
At 3,100 meters, the Krähbergtunnel is the longest single-track railway tunnel in Germany in the existing network of Deutsche Bahn . After the Kaiser Wilhelm Tunnel , it was the second longest at the time of its completion and is the fourth longest tunnel in the existing network after the Schlüchtern Tunnel and the Fahrnau Tunnel .
This tunnel of Odenwaldbahn underpass under the Krähberg ( ), the watershed between Main and Neckar . It connects in the red sandstone area of the Odenwald Hetzbach in Mümlingtal with Schöllenbach in Ittertal (both town of Oberzent ). To do this, the route in Pfeifersgrund leaves the Mümlingtal in a 90-degree curve to the east, at its upper end - still in the field markings - reaches the west portal of the tunnel, leads under the Krähberg, occurs south of Mittelberg ( ) and north of the Kohlebuckels ( ) in the deeply cut Tunnelbach valley at the east portal and thus reaches the Schöllenbach valley and after the village of Schöllenbach the Ittertal.
The structure lies in a straight line and rises from the western portal initially over a length of 1944 m at 1: 150, then follows with 230 m length the horizontal apex, which is , and finally a slope of 1: 500 with a length of 926 m.
The tunnel construction work was awarded to the building contractor Leo Arnoldi from Cologne , who contractually undertook to complete the tunnel by May 1, 1882. Work began in the summer of 1878 with the sinking of four shafts. The tunnel was opened on October 16, 1879. A modified Belgian construction method was chosen for the tunnel construction . Here, the base tunnel was initially created as an alignment tunnel , followed by the ridge tunnel . Subsequently, after an expansion, the crown vault was bricked up and after it was underpinned , the entire vault was gradually completed with further excavation at the same time. In the red sandstone was carried out a drilling and blasting , and the holes were machined. The excavated area was 36–40 m 2 .
The keystone of the Krähberg tunnel was set on February 22, 1882. The line between the Hetzbach and Eberbach stations - and with it the Krähbergtunnel - was officially opened to passenger traffic on May 27, 1882 . With the handover of this section of the route, the connection from Darmstadt to Eberbach was completed. Freight traffic was also opened five days later .
In November and December 2006 a two-week renovation of the track and track bed took place. Wooden sleepers were replaced by steel sleepers in the tunnel and new rails were installed. The investment volume for the measures was three million euros. The Krähberg tunnel is not equipped with modern tunnel rescue systems such as emergency exits . For technical assistance in the event of an accident, Deutsche Bahn AG purchased an emergency fire engine operated by the Beerfelden volunteer fire brigade .
- State Office for Monument Preservation Hessen (Ed.): Himbächel Viaduct and Krähberg Tunnel In: DenkXweb, online edition of cultural monuments in Hessen
- Krähberg tunnel. In: Viktor von Röll (ed.): Encyclopedia of the Railway System . 2nd Edition. Volume 6: Freight Transport Crises . Urban & Schwarzenberg, Berlin / Vienna 1914, p. 415 .
- Krähberg tunnel. In: Structurae
- Images of the tunnel portals
- City of Oberzent, accessed on December 3, 2019: Himbächel Viaduct and Krähberg Tunnel