Hi Lutz. You are confusing CityRailLink with the CentralInterceptor project. The former is 12 meter transport tunnel whereas the latter is a 5.45m waste water tunnel.
In any case, knowing your preferences, you will be glad to hear that it is 2-0 for Herrenknecht.
@Pankaj You were right about the tail brushes
"The seal of Chundee’s t...brush went off when it was boring a sand aquifer that contained large volume of water. Before Urvi started digging...
Looking back the Cologne tunnel sinking, can you blame the Bundestag administrators?...e City Archives." , Two people died, valuable archival materials sank into water and mud. Previously, several...