Feuerbach Tunnel: Stabilization of an Excavation for a New Emergency Access
The new Feuerbach Tunnel starts at Feuerbach Station and leads to Stuttgart’s main station. It is primarily advanced using mining methods, and the construction of the tunnel also includes a conversion of Feuerbach Station.
In section PFA 1.5, lot 2, a loop line and a trough structure with a total of 28 blocks are being built. In this area, the installation of the DYWIDAG Strand Anchors produced and supplied by DSI Germany posed a challenge due to the fact that the train tracks had to remain in operation and space was limited.
To stabilize the excavation for a new emergency access, 1,475m of 3-4 strand DYWIDAG Strand Anchors were installed in 3 layers. 954m of these anchors were designed for semi-permanent use.
Another excavation was required for a new pedestrian underpass from Siemens Street to the Feuerbach-Wiener Platz Station. 1,216m of 14.5 to 33m long 3-4 strand DYWIDAG Strand Anchors were installed in 3 layers above each other at this site. 114m of DYWIDAG Strand Anchors and 19 GEWI® Piles were installed to stabilize a 3.5m long pedestrian ramp.
Within the scope of the stabilization of track No. 102 and during the construction of the trough structure, 328m of 9-20m long 3-4 strand DYWIDAG Strand Anchors were installed, 266m of which were designed for semi-permanent use.