The new U-Bahn line in Hamburg, Germany, is a key link in the development of the HafenCity area. The U4 passes under the river Elbe and the Alster basin.
Together, they specified Roxtec cable penetration seals to handle the extreme demands for water-tightness, both during construction and in the future.
Given the delicate location, Hamburger Hochbahn AG and the tunnel design firm, Obermeyer Planen + Beraten GmbH, decided to go for a proven sealing solution.
Roxtec seals are used for efficient sealing of cables and pipes – under flood protection gates, into stations, and into equipment rooms.