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Hochtief has won a contract for part of the new suburban railway trunk route in Munich, Germany, in a joint venture with Implenia worth approximately €400 million.

The contract is from Deutsche Bahn (German Federal Railway) for the second trunk route. The joint venture, under the technical leadership of Implenia, will build the central station at Marienhof.

The two companies each have a 50% stake in the joint venture.

The second trunk route is designed as an additional underground inner-city link, which runs roughly parallel to the first trunk route in the centre of Munich. The first route opened in 1972.

The project, for which the overall construction work began in 2017, runs for a length of around 10km.

René Kotacka, head of the Implenia Infrastructure business unit, said, “This complex infrastructure construction project with demanding special foundation engineering, tunnel construction and solid construction, requires highly specialised technologies and comprehensive know-how.”

The construction work will start in the summer of 2019. The new Marienhof station will be located in the centre of Munich, right behind the city hall.

The station structure, centrally located under Marienhof, will initially be constructed in an open construction pit and then subsequently in a construction pit underneath a concrete cover. The new station is located at a depth of approximately 40m, and will pass underneath the tunnels of the underground railway lines U3 and U6.

The 210m-long platforms will be situated at the lowest level, followed by an approximately 14m-high distribution floor and a mezzanine floor with the staircases up and down to the new urban railway station, as well as an overpass to the existing underground railway.

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