The Boßler Tunnel – the longest Tunnel on the new Line Wendlingen–Ulm

The Boßler Tunnel is currently under construction in the planning section 2.2 “Albaufstieg” on the new line from Wendlingen to Ulm as part of the upgrading of the “Main Line for Europe” (central European west-east rail corridor). The single-pass tunnel is bored by a tunnel boring machine (EPB-TBM) and has an excavated diameter of 11.39 m. The lining of the two tunnel bores consists of 45 or 65 cm thick reinforced concrete segments. The length of each bore is 8806 m. In particular the forecast squeezing rock conditions and karst phenomena pose engineering challenges. In the first seven months of tunnelling from April to October 2015, 2959 m were driven and 1457 segment rings were installed.

Overview of the overall Project

The Stuttgart–Ulm rail project is divided into the project sections Stuttgart–Wendlingen (Stuttgart 21) and the new line Wendlingen–Ulm. The project section Stuttgart–Wendlingen is divided into seven planning sections (PFA) and includes the rail junction at Stuttgart, the redesign of Stuttgart main station, the Filder station at the airport, the new line from the airport to Wendlingen and associated access lines. The construction works include altogether 18 bridges, 16 tunnels and culverts. The largest tunnel in this section (PFA 1.2) is the Filder Tunnel with a...

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Issue 2014-04 Germany

Albaufstieg: 5 km of Tunnel already driven

The Stuttgart 21 project plans the creation of two additional tracks on the Stuttgart-Ulm-Augsburg route for a top speed of 250 km/h. The altogether 60 km long new route between Wendlingen and Ulm...

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Issue 2015-03 Germany

TBM at the Boßler Tunnel starts Drive and Ring Construction

The TBM named “Kätchchen” used to drive the Boßler Tunnel began its work in mid-April, 2015. The machine built by Herrenknecht first tackled the eastern bore, which will one day accommodate the...

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Issue 2017-04 Germany

Boßler Tunnel: TBM commenced Building the second Tunnel Tube

Käthchen, the tunnel boring machine (TBM), which the DB Projekt Stuttgart–Ulm GmbH is using to drive the Boßler Tunnel on the new Wendlingen–Ulm rail route, embarked on its second shield passage...

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Germany

Boßler Tunnel: TBM commenced building the second Tunnel Tube

Käthchen, the tunnel boring machine (TBM), which the DB Projekt Stuttgart–Ulm GmbH is using to drive the Boßler Tunnel on the new Wendlingen–Ulm rail route, embarked on its second shield passage...

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Issue 2014-08 Germany?/?New Wendlingen–Ulm Route

Symbolic Starting Shot for the mechanized Drive of the Boßler Tunnel

The christening of the “Käthchen” tunnel boring machine (TBM) on November 8, 2014, marked the symbolic starting shot for driving operations on the Boßler Tunnel at the Aichelberg portal. From...

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