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Featured Videos | November 23, 2020

Encountering Caverns in France: TBM Tunneling in Karst Conditions

France's recently completed Galerie des Janots featured some unexpected challenges: Karst cavities large and small were found throughout the bore as well as two large, uncharted caverns. During excavation with a Main Beam TBM, crews encountered an 8,000 c [...]

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France's recently completed Galerie des Janots featured some unexpected challenges: Karst cavities large and small were found throughout the bore as well as two large, uncharted caverns. During excavation with a Main Beam TBM, crews encountered an 8,000 c [...]

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Featured Blog | November 19, 2020

Tunneling in Karst: Your Questions Answered

On November 18, 2020 we held a webinar on a unique recent project, France's Galerie des Janots. That event's question and answer session is detailed here, along with some new info and drawings on TBM tunneling in karst. [...]

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On November 18, 2020 we held a webinar on a unique recent project, France's Galerie des Janots. That event's question and answer session is detailed here, along with some new info and drawings on TBM tunneling in karst. [...]

Keep Reading  >

Featured Events | November 4, 2020

TBM Tunneling in Karst Conditions

France's recently completed Galerie des Janots featured some unexpected challenges: Karst cavities large and small were found throughout the bore as well as two large, uncharted caverns. During excavation with a Main Beam TBM, crews encountered an 8,000 c [...]

Keep Reading  >

France's recently completed Galerie des Janots featured some unexpected challenges: Karst cavities large and small were found throughout the bore as well as two large, uncharted caverns. During excavation with a Main Beam TBM, crews encountered an 8,000 c [...]

Keep Reading  >

Featured News | October 16, 2020

Robbins Main Beam carves out a win in Louisville

A 6.7 m (22 ft) diameter Robbins Main Beam TBM and conveyor system broke through on September 22, 2020, giving the crew much to celebrate: They had overcome overstress in the crown that resulted in significant rock fallout in seven different areas, as wel [...]

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A 6.7 m (22 ft) diameter Robbins Main Beam TBM and conveyor system broke through on September 22, 2020, giving the crew much to celebrate: They had overcome overstress in the crown that resulted in significant rock fallout in seven different areas, as wel [...]

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Featured Events | September 16, 2020

Boring Through 48 Fault Zones and 26 Bar Pressure

Difficult ground doesn't begin to describe the challenges overcome at a recent tunnel in central Turkey. The breakthrough of a 5.5 m diameter Robbins Crossover XRE TBM at the Gerede Water Transmission Tunnel was a feat of modern construction, involving 48 [...]

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Difficult ground doesn't begin to describe the challenges overcome at a recent tunnel in central Turkey. The breakthrough of a 5.5 m diameter Robbins Crossover XRE TBM at the Gerede Water Transmission Tunnel was a feat of modern construction, involving 48 [...]

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News | October 16, 2020

Robbins Main Beam carves out a win in Louisville

A 6.7 m (22 ft) diameter Robbins Main Beam TBM and conveyor system broke through on September 22, 2020, giving the crew much to celebrate: They had overcome overstress in the crown that resulted in significant rock fallout in seven different areas, as well as methane gas in the tunnel.   [...]

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News | August 25, 2020

Robbins Single Shield breaks through Turkey’s Hardest Rock

On July 24, 2020, a jubilant ceremony marked a milestone for southern Turkey’s arduous Bahçe-Nurdaği High-Speed Railway Tunnel. The first TBM-driven portion of tunneling using an 8.0 m (26.2 ft) diameter Robbins Single Shield machine is now complete. [...]

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In January 2020, a Robbins 5.97 m (19.6 ft) diameter Main Beam TBM cleared its final hurdle when it broke through in Guangxi Province, China. The tunnel was marked by a gauntlet of challenges, from karst cavities to fault zones and water inflows.

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Press Release | March 2, 2020

Tough TBM breaks through after navigating Faults, Karst, and More