Metro City Tunnel Karlsruhe


Karlsruher Schieneninfrastruktur-GmbH (KASIG),
Karlsruhe, Germany


BeMo Tunnelling GmbH, Niederlassung West

Project location

Karlsruhe, Germany

Start of construction


End of construction


Project total value

443 million €


Gravely-sandy sediments, cohesive penetrated sands, clays and clay-sand-mixtures, soil, 4 – 8 m overburden

Technical Data

• Construction of KASIG’s 4.6 km metro project “Stadtbahntunnel” including 3.9 km tunnels (incl. Cut & Cover), 7 underground stations („Europaplatz“, „Lammstrasse“, „Kronenplatz“, „Durlacher Tor“, „Marktplatz“, „Ettlinger Tor“, „Kongresszentrum“), 8 stations including interior works: “Helmholtz-Gymnasium und Grashofstrasse”, “Kaiserstrasse West”, “Europaplatz”, “Durlacher Allee”, “Bernhardusplatz”, „Gottesauer Platz“, „Augartenstrasse“
• Tunnel Kaiserstrasse (double-track): 2,050 m
o Hydroshield Ø 9.3 m, lining with concrete segments
• Tunnel Karl-Friedrich-Strasse (double-track including triple-track enlargements): 250 m
o Shotcrete-method (NATM) using compressed air (designed for up to 1.5 bar), Cast-in-situ concrete lining
o Cross-section: 70 - 170 m²
• Tunnels and ramps using open cut method (Ramp „Muehlburger Tor“, Ramp „Durlacher Allee“, Tunnel „Ettlinger Strasse“ (Ettlinger Tor – Kongresszentrum), Ramp „Ettlinger Strasse“
• Foundation Engineering
• Track, road and sewer construction
• Structural Analysis and Detailed Design (work & as-built drawings) by BeMo’s Tunnel Design Department

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