The work, which is worth somewhere in the 鈥渉igh hundreds of millions of Euros鈥� to the joint venture, is part of the major Second Core S-Bahn Route project in Munich, Germany, for rail company Deutsche Bahn.

The work under the 鈥�733 Tunnel Ostbahnhof鈥� contract includes structural works for the Ostbahnhof stop and the tunnel tubes between the Marienhof and Ostbahnhof stations.

The joint venture will build two traffic tunnels and a rescue gallery, eight connecting structures between the main tunnels, a junction structure, several galleries and shafts, and the shell construction of a new underpass in the Ostbahnhof station.

Work will start later this year and is scheduled for completion in May 2033.

Implenia said that it would employ the 鈥渟ystematic use鈥� of BIM technology and proven Lean working methods to keep the project on track.

Implenia and Hochtief have been working together on the Second Core S-Bahn Route in Munich since 2018, as part of the Marienhof joint venture that is building the central Marienhof station in the heart of the city. Implenia is the technical lead for the Marienhof joint venture, while Hochtief is the technical lead for the Tunnel Ostbahnhof joint venture. In each case the other partner is taking the commercial lead.

Both companies own a 50% share of the Tunnel Ostbahnhof joint venture.

The Munich S-Bahn, opened in 1972, is one of the largest local public transport systems in Germany. Implenia said the 11.3 km long main line has reached its capacity limit, as all S-Bahn trains have to cross the city centre through a single tunnel. The approximately 11 km long Second Core Route is intended to relieve the existing line.