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Tunnel boring machine mixshield TBM - ø 4.2 - 19 m | Mixshield
The Mixshield technology developed by Herrenknecht is an advance on conventional slurry technology. The support pressure in the Excavation chamber is precisely managed using an automatically controlled air cushion. This means that heterogeneous geologies and high water pressures of more than 15 bar can be controlled safely even with very large excavation diameters.