Relief for local transport

The approximately 11-kilometre-long second main line of the Munich S-Bahn, which runs between Laim in the west and Leuchtenbergring in the east, is a key infrastructure project for the region. Its primary purpose is to relieve the existing main line and provide additional alternatives. It also lays the foundation for an express S-Bahn system. The core of the project is a seven-kilometre-long tunnel that begins shortly before the Donnersbergerbrücke bridge and ends just before the Leuchtenbergring S-Bahn station.

Special civil engineering and structural engineering working hand in hand

The VE734 contract package, which has been divided into four lots, comprises the tunnel section between the Ostbahnhof station and the Berg-am-Laim-Straße crossing. As part of contract package 2, PORR's special civil engineering and structural engineering divisions are constructing the approximately 65-metre-long and up to 30-metre-wide rescue shaft 9. This shaft will enable rapid evacuations and also serve as the starting shaft for tunnel driving. The approximately 20-metre-deep construction pit is enclosed by a back-anchored diaphragm wall. This will be followed by the approximately 55-metre-long crossing structure, which will be constructed using the box girder method and will allow traffic to flow over the tunnel construction site. Here, the construction pit will be enclosed by an overlapping bored pile wall. PORR Structural Engineering is responsible for the construction of the load-bearing elements such as ceilings, floors and interior walls for both structures. The contract also includes subsoil improvement with high-pressure injections, the construction of two culverts, road construction measures, civil engineering work as well as excavation and professional disposal.

The work in contract package 3, awarded to PORR Groundwater Management in Austria, includes the installation and operation of vertical and inclined wells as well as the implementation of a groundwater treatment plant. In addition, infiltration basins will be created and horizontal filter wells will be constructed for the culvert structures.

Rail partnership model with Deutsche Bahn

Partnership and integrity are particularly important in this project. The rail partnership model developed by TU Berlin in collaboration with the construction industry and Deutsche Bahn does not rely on the classic client-contractor principle with strict hierarchical levels. Instead, Deutsche Bahn promotes partnership and collaborative cooperation based on joint deadlines, costs and quality targets through a multi-party or alliance agreement. This marks a new, innovative approach to construction management that promotes close cooperation and leads to better coordination and more efficient project management.

‘Working shoulder to shoulder is a value that is firmly anchored in PORR's corporate culture. Among other things, it stands for the exchange of information and knowledge as well as working on an equal footing. With its ‘Partnership Model Rail’ cooperation model, Deutsche Bahn hits exactly this core. We look forward to close cooperation with the client,’ explains Claude-Patrick Jeutter, Managing Director of PORR Germany.