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  Rock Tunnels at High Water Pressure Non -Continuous Pressurized Tunneling vs. Slurry Tunneling

  Abstract: The choice of TBM type is never easy, but it becomes especially challenging when faced with a hard rock tunnel with expected high water pressures. While Slurry Shield tunneling has a long history of addressing this problem, this method has not always been problem-free and can prove costly. At recent projects around the world, two other methods have proven themselves in hard rock under water...

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