Emstunnel
 Emstunnel
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 Emstunnel (aerial view)
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| use | Road tunnel tunnel code B | |||
| traffic connection | A 31 | |||
| length | 945 meters | |||
| Number of tubes | 2 | |||
| construction | ||||
| start of building | 1984 | |||
| completion | 1989 | |||
| business | ||||
| release | October 6, 1989 | |||
| location | ||||
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| Coordinates | ||||
| West portal | 53 ° 13 '49 " N , 7 ° 23' 56" E | |||
| East portal | 53 ° 14 ′ 10 " N , 7 ° 24 ′ 33" E | |||
Map with all coordinates: The Emstunnel is a 945 meter long road tunnel consisting of two tubes under the Ems near Leer .
Geographical location
The Emstunnel is part of the federal motorway 31 from Emden via Leer and Lingen to Bottrop .
history
The aim of the tunnel construction was to improve the transport infrastructure in East Friesland and its economic focuses Emden and Leer, in particular through the connection to the economic region of the Ruhr area . At the same time, the A 31 and the crossing under the Ems created the European route 22 as an extension of the Dutch A 7 from Groningen via the federal motorway 280 and the A 28 to the Oldenburg / Bremen area as an important west-east connection.
The Emstunnel was built between 1984 and 1989 and was opened to traffic on October 6, 1989 with the section of the motorway going towards the Dutch border.
From July 2013 to October 2014, the Emstunnel was completely renovated. The reason for the complex renovation was a. new guidelines for safety technology. In addition to loudspeakers and video cameras, the drainage systems also had to be replaced, through which flammable liquids can drain off in the event of an accident. In addition, the road surface had to be renewed due to various cracks. The federal government bears the costs of around 13 million euros for the renovation.
During the renovation work on the Emstunnel, a five-centimeter leak arose in the tunnel tube during drilling on December 6, 2013 , because employees of a construction company involved had drilled too deep. Around 500 liters of water per minute from the Ems flowed through the leak into the south tube of the tunnel. Only through the use of powerful pumps from the Jemgum and Holtgaste volunteer fire brigades could the tunnel tube be prevented from filling up. On December 10, 2013, the fire department announced that another leak had been discovered in a seal. First efforts to close the holes failed. Only on December 13, 2013, specialists from the Technical University of Braunschweig and the state authority for road construction were able to plug the leak with special resin adhesives .
background
After the Elbe Tunnel in Hamburg , the Emstunnel was the second tunnel in the mouth of a German river, which was built because bridges over the river were not an alternative given the tall structures of ships. In the case of the Emstunnel, it is the cruise ships from the Papenburg Meyer shipyard that would have been too high for bridges.
Web links
Individual evidence
- ↑ Lower Saxony State Authority for Road Construction and Transport: A 31 - Repair and technical retrofitting of the Emstunnel , accessed on November 25, 2014
- ↑ Emstunnel near Leer becomes a bottleneck ( Memento from February 8, 2014 in the Internet Archive )
- ^ Nwzonline.de: Second leak in Emstunnel , accessed on December 11, 2013
- ↑ Special adhesive seals leaks in the Ems tunnel ( Memento from February 5, 2014 in the Internet Archive )