First Tunnel Refurbishment with Cathodic Corrosion Protection in Germany

Classical renovation methods did not turn out to be practical for redeveloping the Rendsburg Canal Tunnel in Germany. But cathodic corrosion protection (CCP) emerged as a long-term solution. This internationally tried-and-tested technology could well feature big in Germany in future.

After the Hamburg Elbe Tunnel dating from 1912, the two-tube 640 m long Rendsburg Canal Tunnel, which opened in 1961, was the second underwater tunnel built in Germany for road traffic. Now it is the first tunnel in this country to be equipped with cathodic corrosion protection. Particularly in the winter months, the thawing salt carried in by up to 50 000 vehicles per day via the drag water resulted in high chloride exposure on the tunnel walls and carriageway. Conventional redevelopment measures undertaken on the ferro-concrete reinforcement and reworking the concrete failed to provide a...

Related articles:

Tunnel Refurbishment

First Tunnel Refurbishment with Cathodic Corrosion Protection in Germany

After the Hamburg Elbe Tunnel dating from 1912, the two-tube 640 m long Rendsburg Canal Tunnel, which opened in 1961, was the second underwater tunnel built in Germany for road traffic. Now it is the...

more
Issue 2012-05 Challenge in Tunnel Redevelopment

General Renovation of the Rendsburg Canal Tunnel

The Rendsburg Canal Tunnel under the North-Baltic Sea Canal was opened for traffic in 1961. Since then the canal tunnel has been an important, practically indispensable part-section of the north-south...

more
Issue 2013-04 Germany

Heslach Tunnel with light Tunnel Walls – safer and with more optical Appeal

Stuttgart’s Heslach Tunnel is the longest urban bi-directional tunnel in Germany. Around 50,000 vehicles use the centrally sited tunnel on a daily basis. It links the federal highway 14 with the...

more
Issue 2014-03 Surface Protection

Removing Graffiti with minimal Cleaning Effort

Graffiti artists love to leave their supposed works of art all over the place on large areas, the fronts of buildings, bridges, underpasses as well as transport tunnels. Their graffiti are annoying...

more
Issue 2014-06 Bolting Technology

Mineral Dry Mortar

Sika Deutschland GmbH offers SikaRock Anchor Mortar 1 and SikaRock Anchor Mortar HS – two hydraulically hardened and pure mineral dry mortars – for anchoring rock nails and filling anchor drill...

more