Technical specifications

Scope of work

• Total length 120 m, approx. 75 m drive under historical Kaufhof-Building
• Connection to station Heinrich-Heine-Allee
• Tunnel with segmental lining Lot 1

Construction method 

• Start- and reception cavern with diphragm walls
• Navigated horizontal drilling R = 350 m for ground freezing
• Excavation with tunnel excavator in two segments with shortcrete