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.

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

After multiple delays, including a 9-month delay involving a century-old anchor, the Chesapeake Bay Bridge-Tunnel (CBBT) expansion achieved a major milestone as its tunnel boring machine reached ...

The rescue teams’ leaders informed that cutting the tunnel boring machine (TBM) platform into small parts was going on swiftly as also the removal of debris (soil) covering the TBM. The parts ...

The route's mix of rock and soil causes frequent disc replacements, as the discs mounted on the Tunnel Boring Machines are damaged by hard rock or boulders. Each cutter disc costs between Rs 1.5 ...