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Main beam tunnel boring machine carves out win in Louisville, KY

机译:主束隧道镗床雕刻在路易斯维尔,KY

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A 6.5 km (4 mile)-long tunnel for waste water storage below Louisville, KY has more to it than meets the eye. "At first glance, this seems like a straightforward project, but it turned out to be much more challenging," said Shemek Oginski, project manager for the contractor, a joint venture of Shea/Traylor. The 6.7 m (22 ft) diameter Robbins Main Beam tunnel boring machine (TBM) and conveyor system had to cope with overstress in the crown that resulted in significant rock fallout in seven different areas, as well as methane gas in the tunnel. By the machine's breakthrough on Sept. 22, 2020, the crew had much to celebrate.
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