New high-speed railway lines Stuttgart 21 and Wendlingen-Ulm -approximately 100 km of tunnels

Approximately 100 km of tunnels are foreseen for the construction of the new high-speed railway lines Wendlingen-Ulm and Stuttgart 21. Tunneling in squeezing rock as well as in karstified rock is decisive with regard to construction time and costs of the tunnels for the new high-speed railway line from Wendlingen to Ulm (Wittke W. 2004b). The design and construction of tunnels in swelling rock is a major challenge in connection with the project Stuttgart 21.