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Herrenknecht breakthrough at Buettenberg

10/12/2009
Herrenknecht breakthrough at BuettenbergOn 20.11.2009 the 2,500 t Herrenknecht TBM broke through on the first tube of the 1,230 m A5 Buettenberg tunnel on Biel bypass. It will now be moved to Langhoelz portal for excavation of the second tube. For more about this project visit tunnelbuilder archive ch/56 and http://www.a5-biel-bienne.ch. 49/09. Breakthrough at Buettenberg tunnel on the A5



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