Here's how the tunnel boring machine, or TBM, works: As the 200-ton TBM moves forward, a round cutter head studded with titanium teeth grinds into the tunnel face and splits large chunks off the rock.

Tunnel boring machines (TBMs) prefer to chew rocks, not mud. Besides, they can't support the wet ground, so the tunnel walls are collapsing! TBMs work much better in rock tunnels. Try this ...

Meet Brenda, a 600-pound machine that cuts through the earth like it's a piece of cake. The massive tunnel boring machine, whose face is essentially a giant rotating cutter, completed a six-month ...

A tunnel boring machine (TBM) has completed excavating a second bore of the 5-mile-long Northolt Tunnel for the HS2 ...

Technical staff conduct inspection inside "Jianghai," a giant self-developed tunnel boring machine deployed for the construction of the Haitai Yangtze River Tunnel, in Haimen, east China's Jiangsu ...