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Reinforcement cages for the new Karlsruhe metro tunnel

SOTRALENTZ Construction delivers reinforcement cages for the new Karlsruhe metro tunnel

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SOTRALENTZ Construction is currently delivering welded wire mesh reinforcement cages for the new metro tunnel in Karlsruhe.

Based in Alsace, SOTRALENTZ Construction manufactures welded wire mesh. The firm has previously delivered reinforcement cages for other tunnels in France and elsewhere in Europe:

– Tramway NICE
– Métro  Rennes
– Tunnel  A41
– Tunnel BURE
– LGV Est high-speed line, Saverne
– Motorway tunnels: A86, Paris; A41, Annecy
– Tunnels in Kinding (Germany), Uetliberg (Switzerland), Liefkenshoek (Belgium), Salazie (Reunion Island)

Like other cities in Germany before it, in 2010 Karlsruhe embarked on a major city-centre redevelopment project. Adopted by the city council in 2002, the project is due to be completed in 2019 with the commissioning of the last three underground stations on Kriegsstraße. A key component of this redevelopment project is the transformation of the S-Bahn tram-train network, currently a mostly above-ground system, into a semi-metro, with the construction of underground lines and stations – a hybrid solution known as a Kombilösung.

Saverne tunnel

Drilling work on the Saverne tunnel completed

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Drilling work on the second tube of the Saverne TGV rail tunnel was completed on 25 February 2013.

Three Sotralentz Group subsidiaries worked on the project, through the manufacturing of the tunnel-boring machine’s shield on the premises of Sotralentz Métal Industries, the manufacturing of 700 tonnes of reinforcement cages (segmental linings) at Sotralentz Construction and the supply of Actibloc wastewater treatment plants for three construction site facility centres, including the one at Ernolsheim-Lès-Saverne, at which an Actibloc 100 PE (population equivalent) system made up of two double-skin tanks (i.e. a settling tank and a clarification tank), each with a volume of 35 cubic metres, were used.