Tunnels - Wayss & Freytag Ingenieurbau AG

Cologne North-South Light Railway, Southern Section
Germany
General Data:
Project: Cologne North-South Light Railway, Southern Section,
single-track metro tunnel
Client: Kölner Verkehrsbetriebe AG, Cologne
Contractor: Wayss & Freytag Ingenieurbau AG in a joint venture
Construction period: November 2003 to mid-2012
Construction costs: € 470 million
Technical Data:
Scope of work: 3,260 m of light railway line with 2 single-track tunnels, total length: 5,400 m,
internal diameter: 7.30 m; 7 stations; 1 crossover; 1 weaving section
Construction method: TBM tunnelling using 2 Mixshields (slurry shields), shield diameter: 8.39 m,
segmental lining; use of complex special construction methods, e.g. ground
freezing, soil stabilisation (jet grouting and compaction grouting), groundwater
lowering, compressed air tunnelling using ground freezing methods and pipe
umbrella support systems
Geology: Quaternary sands/gravels Brandkopf/Lohmeberg Tunnels
Germany
General Data:
Project: German Unity Transport Project VDE 8, Upgraded and New Railway Lines between
Nuremberg and Berlin (Nuremberg-Ebensfeld-Erfurt-Leipzig/Halle-Berlin railway
line), Brandkopf Tunnel - Lohmeberg Tunnel
Client: DB Netz AG, Erfurt [German railway company]
Contractor: Wayss & Freytag Ingenieurbau AG as commercial leader of a joint venture
Construction period: August 2009 to March 2012
Construction costs: € 80 million
Technical Data:
Scope of Work: 2 tunnels, lengths: 1,493 m and 688 m, excavated area: 120 m² - 150 m²;
2 reinforced concrete railway bridges, spanning: 150 m and 87 m respectively
Construction method: Drill and blast method and tunnel excavator, water proofing and inner lining
Geology: Lower Rotliegend, volcanic rock, clay, siltstone and sandstone
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