No one has been going deeper than HOCHTIEF in Munich: We drilled up to 70 meters deep in the heart of the Bavarian capital in order to prepare for the construction of the new station Marienhof in the old town. The new station of the second regular S-Bahn line (including the platform tunnels, which HOCHTIEF also creates) is at a depth of 40 meters. The reason: Even under the earth, there is already a lot going on in Munich. For example, lines U3 and U6 need to be crossed.
The building can be thought of as a six-story building, which is only built level down. Due to the depth and size of the later stop, we don't just dig a huge hole into the depth at the Marienhof. This would have far too much impact on life and work in the city with Germany's largest commuter train. Instead, we are building the station in a codenel construction. From the ground surface down, a ceiling is concreted for each floor, under which the further excavation of the earth takes place. A total of around 270,000 cubic meters of excavation is required. The first lid is just finished. In the last, i.e. lowest "floor", the two platform tubes are created.