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Weinbergtunnel
Requirement
tunnelling project
| Employment | Railroad | |
|---|---|---|
| Geology | Molasse, unconsolidated rock | |
| Tunnel Length | 4,416 m | |
| Diameter | 11,240 mm |
Solution
machine data
| Machine Type | Mixshield | |
|---|---|---|
| Support Techniques | Segmental Lining | |
| Cutterhead Power | 3,200 kW | |
| Torque | 19,800 kNm |
Zurich has been redefining itself continually since the end of the 20th century – as an open, lively metropolis with an international flair and offering a high quality of life. One of the most important infrastructure projects in Zurich is currently the so-called “Durchmesserlinie” (Diameter Line) – a dual-track railway connection through the city which also involved the construction of a very complex tunnel, an underground through station and the development of a new quarter around the central railway station.
This major “Durchmesserlinie” project will transform Zurich’s terminal station into a through station. The convertible S-451 Mixshield known as Belena with a diameter of 11,240 mm is applied in the Weinbergtunnel section. This railway tunnel with two tracks in a single tunnel represents a particular challenge on account of its geology which features both molasse and unconsolidated rock. A well-practiced team of experienced miners is in action on the high-tech machine: entire segment rings - comprising 5+1 segments - have been installed in less than 15 minutes on several occasions. More than 4 kilometers of the 4.4 km stretch have already been completed. Following conversion from open to closed drilling mode, the shield will bore under the Limmat River (in groundwater) toward the central railway station.
