Munich
2. Main line
Munich, Germany /
The 2nd Main Line will create a further underground link in Munich’s S-Bahn network. The line, approximately 11 km long, runs between Laim and Leuchtenbergring and comprises several tunnels, stations and civil engineering structures. PORR was awarded the contract for two contract packages for the tunnel section at Haidenauplatz as part of tendering unit VE734. The works will be carried out by the structural engineering, special civil engineering and groundwater management divisions. The contract was awarded under Deutsche Bahn’s rail partnership model.
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Facts & Figures
Company
PORR GmbH & Co. KGaA, PORR Spezialtiefbau GmbH
Type
Rail and road tunnels
Structures for the Munich Main Line (Phase 2)
Tunnel structures at Haidenauplatz
Contract package VE734 covers the section between Ostbahnhof and the Berg-am-Laim-Straße crossing. As part of contract package 2, rescue shaft 9 – approximately 65 m long – as well as the Berg-am-Laim-Straße crossing structure – approximately 55 m long – are being constructed. The rescue shaft will later serve as an access structure and will be used during the construction phase as a launch shaft for tunnel boring. The construction pit, which is up to 20 m deep, will be secured by a back-anchored diaphragm wall. The crossing structure will be constructed using the top-down method and enclosed by overlapping bored pile walls.
Civil engineering and special civil engineering on a single construction site
In addition to load-bearing components such as ceilings, floors and internal walls, the contract includes subsoil improvements using high-pressure grouting, the construction of two culverts, as well as further groundworks and roadworks. The scope of works also includes excavation and the disposal of the resulting material.
Groundwater management for tunnelling
A further contract package is being implemented by PORR Grundwasserhaltung from Austria. The works comprise the construction and operation of vertical and inclined wells, as well as the construction of a groundwater treatment plant. In addition, infiltration basins and horizontal filter wells are being built for the culvert structures.
Rail Partnership Model
The works are being carried out under Deutsche Bahn’s Rail Partnership Model. This model provides for joint project management by the participating partners within a multi-party contract. Planning and construction are co-ordinated within joint project structures. The model is used for various Deutsche Bahn infrastructure projects.
Part of the 2nd Munich Main Line
The structures at Haidenauplatz will lay the structural foundations for the future tunnel section between Ostbahnhof and Berg am Laim. Rescue shafts, underpasses, groundwater control and special civil engineering works will form key components of the future line. The project forms part of the phased implementation of the second main line within the Munich urban area and supports the expansion of the rail infrastructure in the Munich transport hub.