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.

VIRGINIA BEACH, Va. — After multiple delays, including a 9-month delay involving a century-old anchor, the Chesapeake Bay ...

Tunnel boring machines (TBMs) are essential for constructing tunnels through various geological formations, and the disc cutters are critical components that directly interact with the rock.

On April 17, Mary the Tunnel Boring Machine emerged through the headwall at the Hampton end of the HRBT. Exactly six months ...

China's largest shield tunneling machine cutter head, with a record-breaking diameter of 16.64 meters, descended at the construction site of the Haitai Yangtze River Tunnel in East China's Jiangsu ...

China has completed the production of its largest tunnel-boring ... river dams. The machine is 476 feet long and weighs about ...

TERRATEC, a manufacturer of tunnel boring machines (TBMs ... if necessary. The machine's CutterHead is fitted with 15in heavy-duty back-loading disc cutters and is driven by variable frequency ...

After multiple delays, including a 9-month delay involving a century-old anchor, the Chesapeake Bay Bridge-Tunnel (CBBT ... and caused damage to the machine cutter head. CBBT officials said ...