OBERMEYER Planen + Beraten GmbHOBERMEYER Planen + Beraten GmbH
Munich, 11.08.2015
View into the completed tunnel
Asphalt is laid on the carriageways in the tunnel
Simulating an emergency during the fire test in May 2015

Opening of Luise-Kiesselbach-Platz Tunnel, Munich

The structure actually consists of two tunnels: the 1.5 km long tunnel under Luise-Kiesselbach-Platz and Garmischer Straße, with the altogether 600 m long branch tunnels from and to the motorway A 95, and the 620 m long Heckenstaller tunnel. The two tunnels are separated from one another by a 400 m long cutting. The construction of the structures required 241,000 m³ of concrete and 31,000 t of reinforcing steel - three times as much steel as for the construction of the Eifel Tower in Paris.

The tunnel was largely built under top cover. For that it was necessary to drill a total of 10,091 piles with an overall length of 110 km into the soil. On top of these the tunnel roof was then concreted in three sections, in order to be able to lead traffic past the building site. In all phases the elaborate traffic management measures were likewise supervised by the JV, which consisted of engineers from the consultancies OBERMEYER and Vössing.

The structural shell work had largely been finished by 2014. Since the end of 2013 work on the road construction and technical interior finish had already been started in sections. Besides ventilation and lighting installations, security systems played a major role. In addition the tunnel structure contains four operating stations. They serve i.a. the emergency power supply.

Now that most of the traffic - about 120,000 vehicles per day - has disappeared underground, work can proceed on the surface.

For the most part this is to be converted into a green area, the Heckenstaller park. The JV "Bauüberwachung Mittlerer Ring Südwest" is due to oversee the supervision of works until project completion in 2017.