Technical specifications

Structural modification of Schuman train and metro station;
construction of double-track Schuman-Josaphat Tunnel

• box section
• Length: 1,400 m
• Width: approx. 10.85 m
• Height: 6.86 m
• Pipe jacking to build a pipe umbrella support system

Lengths of pipe jacking

• 703 m with an internal diameter of 3.00 m
• 1,700 m with an internal diameter of 1.80 m
• 550 m with an internal diameter of 1.40 m

Construction method

• Mining techniques for most of the tunnel
• Partly under the protection of manually constructed underpinnings
• Partly by a pipe umbrella support system constructed using the pipe jacking method
• pipe jacking using an AVN 1800 machine

Geology

• Sand with beds of sandstone