THE NEW AND OLD BEBENROTH TUNNEL PROJECT IN GERMANY—TUNNELLING AS PART OF THE DEUTSCHE BAHN TUNNEL INFRASTRUCTURE SAFETY UPGRADE PROGRAM

摘要

A few years ago the Deutsche Bahn (German Federal Railways) launched its extensiverntunnel safety upgrade program for its existing, partially more than 140 year old, doublerntrack tunnel infrastructure. To maintain the maximum operation capacity during the constructionrnphase the general concept includes construction of new single track tunnelsrnnext to the existing structures followed by the refurbishment of the old tunnels once thernnew tunnels are completed. The whole construction activities ranging from standardrnsequential excavation for the newly built tunnel and cross passages to the refurbishmentrnof the old tunnel, requires a vast variety of tunnelling tasks which will be explainedrnbased on the case study of the New and Old Bebenroth-Tunnel.