Ship tunnel
As ship tunnel (also navigation tunnel or channel tunnels ) which is with ships navigable under-crossing of a mountain range , respectively. Depending on the depth of the ships, which are to drive on the tunnel in the future, which will tunnel floor appropriate depth below the water surface created. Ship tunnels are usually built in order to avoid dangerous journeys or to shorten long journeys, but due to the height differences , a canal could only be built with an uneconomically large number of locks .
Examples
Examples are the Weilburg ship tunnel from 1847, which cuts a two kilometer long Lahn arch with shoals near Weilburg and thus avoids it, as well as the Riquevaltunnel in northern France, which was built between 1801 and 1810 , at the time of completion with a length of 5670 meters the longest traffic tunnel in the world.
The 5.6 km long Elbstolln excavated between 1817 and 1837 was also planned as a ship tunnel. It was supposed to be used to transport the extracted hard coal with wooden barges to the Elbe, which is why it was hewn to a height of 3 m. The development of the railroad made it obsolete.
The Koschen Canal , which has been connecting the Senftenberger See with the Geierswalder See in Niederlausitz since 2013 , has two tunnels for the purpose of crossing under the federal highway 96 and the Black Elster with a length of 64 and 90 m respectively
On the Norwegian peninsula Stadlandet , the drilling of the Stad Skipstunnel through the Kjerringa massif is planned in order to avoid having to navigate the extremely restless North Sea with smaller ships in the future .
Numerous tunnels were planned for the canal projects in the Alps .
Individual evidence
- ↑ Website lausitzer-bilder.de
- ^ Freighters and crusaders: Norwegian government plans giant tunnels for ships. In: Spiegel Online. March 17, 2015, accessed March 17, 2015 .