During construction of the new underground U5 line in Hamburg, Germany, U5 GmbH will use steel fiber-reinforced concrete segments in tunnel construction for the first time in Germany, marking a major milestone for the project. These prefabricated concrete components, used to line and stabilize tunnels, reduce traditional steel reinforcement by replacing steel bars with finely distributed steel fibers within the concrete. U5 has received an “approval in individual cases” from the technical supervisory authority for the application. As a result, the joint venture between ZÜBLIN and Wayss & Freytag will be able to install the reduced-steel tubbings in the machine-excavated … Read more