The completed section of tunnel has a diameter of 55.8 feet (17 meters), and it has 500 pipe rings of underwater shielding.

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 ...

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

A new milestone has been surpassed as another HS2 Tunnel Boring Machine (TBM) has completed its five-mile journey beneath ...

According to a report from CGTN, the Dinghai tunnel boring machine (TBM) - which weighs a staggering 4,350 tonnes and features 308 custom-designed cutters - began excavation at 42 metres below sea ...

BEIJING, Dec. 16, 2024 /PRNewswire/ -- The tunnel boring machine (TBM) was invented more than 200 years ago for tunnel engineering. Over the past century, TBMs have been widely used to construct ...

An HS2 tunnel boring machine (TBM) has become the first to complete its drive under London after more than two years of ...