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Corporate Member Profile Gotthard Base Tunnel, Switzerland The Gotthard Base Tunnel, with a length of 35 miles (57 km), will be the longest tunnel in the world upon comple- tion in 2015. Fibermesh 150 fibers were tested and approved for use on this project at the world-renowned Hagerbach Test Gallery in Sargans, Switzerland. Since commencement of the project, Fibermesh 150 fiber at a dosage of 3.4 lb/yd3 (2 kg/ m3) has been the preferred fiber of contractors on various sections of this $12.5 billion (11.7 billion Swiss Franc) project. melbourne, Australia In keeping with the focus on safety, tunnel engineers specified the inclusion of Fibermesh 150 fibers at a dosage rate of 3.4 lb/yd3 (2 kg/m3) in both shotcrete and cast-in-place tunnel linings for this twin-bore 1 mile (1.6 km) long road tunnel. Fibermesh 150 fiber was chosen in preference to other fibers because of its certified performance and because it did not adversely affect the workability and air content of the concrete. Joint Venture group—Theiss John Holland were the contractors on this $3.8 billion project. CTRL, Unitedkingdom This $200 million (£130m) project is part of the Channel Tunnel Rail Link (CTRL) high-speed rail link, which runs for 67 miles (108 km) between the Channel Tunnel and central London. The project has over 25 miles (40 km) of 23.5 ft (7.15 m) diameter, precast-concrete-lined bored tunnels—sections that are constructed in water bearing sand. Fibermesh 150 fibers at a dosage of 1.7 lb/yd3 (1 kg/m3) were used in the production of the precast tunnel lining segments, which also included Novocon steel fibers in a total fiber- reinforced solution. Weehawken Tunnel, New Jersey, USA Tunnel engineers Parsons Brinkerhoff selected the use of Fibermesh 150 fibers for the tunnel lining on the Weehawken twin-track light-rail project in preference to other fiber prod- ucts after establishing that they did not adversely affect the level of air entrainment within the specified concrete. Fiber- mesh 150 fibers were used at a dosage rate of 2.0 lb/yd3 (1.2 kg/m3). Novocon steel fibers were also used to increase the flexural toughness of the tunnel lining. Vomp Terfens, Austria This 5 mile (8.4 km) two- and three-track rail tunnel in the Austrian Tyrol forms part of the main Munich to Verona railway line and is the longest NATM tunnel in the Brenner axis upgrade project. Joint Venture group—Zublin AG, Hoc- tief AG & Strabag Bau-AG selected Fibermesh 150 fiber for the passive fire protection of the final tunnel lining after conducting extensive fire testing and concrete mixture trials. A dosage rate of 3.4 lb/yd3 (2 kg/m3) was specified by the project engineers. Shotcrete • Winter 2013 77


2013WinShotcreteEMag
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