Tunnel boring machines have been in operation for over 200 years and they operate on the same basic principles today as they did back then.

Six months to the day that Mary the Tunnel Boring Machine broke through the headwall at HRBT North Island, she began boring a twin eastbound tunnel.

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 ...

The study of disc cutter wear in tunnel boring machines (TBMs) is fundamental to optimising both the economic and operational performance of subterranean construction projects. Disc cutter wear ...

The tunnel boring machine known as Chessie got back to work on April 8, days before the 60th anniversary of the bridge-tunnel’s opening on April 15, 1964.

China's largest tunnel boring machine (TBM) 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 ...

The Chesapeake Bay Bridge-Tunnel expansion achieved a major milestone as its tunnel boring machine "Chessie" reached its destination.