Tunnels and Metros

Cannstatt Tunnel

Bad Cannstatt tunnel is a 3.8 km long double track railway tunnel which forms part of the Stuttgart 21 rail connection project. The project commenced in 2013 and construction started on the double track section between Rosenstein Park and Neckarportal in 2018. Main tunnelling work was completed in 2020. 

The tunnel connects Stuttgart central station with twin tubes under Rosenstein park to the newly constructed Neckar bridge.

A mix of open construction with a horseshoe profile, cut and cover and mining methods are all being implemented to complete the works.

Once open to the public, it is expected 24,000 travellers will use the new tunnels per day.

Project Summary

  • Name
  • Cannstatt Tunnel
  • Location
  • Stuttgart, Germany
  • Date
  • 2014 – ongoing (opening 2025)
  • Client
  • DB Netz
  • Contractor

Multi-point Borehole rod extensometers with five anchor locations were selected to reliably measure the stability of the ground surrounding tunnel excavations.

Vibrating wire transducers within the heads accurately measure movement of the anchors.

NATM Stress cells were installed to monitor the tangential and radial stresses within the shotcrete coating and rock structure.