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List of products by author: B. Grothen
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Optimizing Soft Ground Excavation: Development and Design of EPB and Slurry Cutterheads
Abstract: The history and development of soft ground tunnelling machines is a long one, and one in which the quest for optimal design to achieve safe and efficient excavation has always been a top priority. Modern soft ground tunnelling began with the introduction of Slurry TBM technology in 1967 and the development of Earth Pressure Balance (EPB) machines a bit later in 1974 in Japan. Many advances have...
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Rock Tunneling Machines: Options and Methods for Variable Geology
Abstract: Modern tunnel boring machines come in a variety of designs that use different excavation methods to address a wide variation of geology seen during tunneling operations. Invariably tunnels of any length run into varying geology, some of which will fall outside the traditional range of any one machine type. On projects where the majority of the drive is rock with a short percentage of a softer...
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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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TBM Excavation in Himalayan Geology: Over 1,200 Meters per Month at the Bheri Babai Diversion Multipurpose Project
Abstract: A Double Shield TBM achieved in 17 months what was projected to have taken 12 years with Drill & Blast: The 12.2 km long Bheri Babai Diversion Multipurpose Project (BBDMP). Bored in Himalayan geology including sandstone, mudstone, and conglomerate, the excavation was able to achieve over 1,200 m advance per month on multiple occasions. Crews achieved this while traversing a fault zone and...
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