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Excavation begins for HS2's first 'barn design' tunnel vent shaft
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![PDF] 1 Numerical Modelling of a Vertical Shaft Excavation | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/0076202dd63f5a20825542343845b190be62ae4e/2-Figure2-1.png "PDF] 1 Numerical Modelling of a Vertical Shaft Excavation | Semantic Scholar")
PDF] 1 Numerical Modelling of a Vertical Shaft Excavation | Semantic Scholar
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CERN shaft completely excavated
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VIDEO: HS2 begins excavation of first 'barn design' tunnel vent shaft
