Behind every tunnel that connects cities or enables transportation across vast distances, there’s an incredible tunnel boring machine working tirelessly. Machines like the Florence TBM and the ...

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 ...

Tunnelling problems are plaguing the $12 billion Snowy 2.0 hydropower project, with a boring machine previously bogged in soft ground now wedged in hard rock and struggling to move. The tunnel ...