VIRGINIA BEACH — Now that the anchor’s away, expansion work at the Chesapeake Bay Bridge-Tunnel is back at full bore. Burrowing of a new tunnel to help carry more vehicles between Virginia Beach and ...

The cutterhead, which has a diameter of 13.6 metres and weighs around 350 tonnes, marks the final stage in the primary assembly of the TBM's main shield. NHSRCL said the machine will be used for ...

The Mumbai-Ahmedabad Bullet Train Project has reached another significant milestone with the lowering of the cutterhead for ...

The National High Speed Rail Corporation Limited has successfully lowered the cutterhead of the second Tunnel Boring Machine ...

Tunnel boring machines rely on arrays of rotating disc cutters to fracture and remove rock under variable geological conditions. Over the service life of a cutter, progressive material loss alters ...

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 ...

A colossal project to reduce traffic in the underground tunnels connecting the Virginia cities of Norfolk and Hampton just had a big breakthrough — literally. Since 1957, the two cities have been ...

Disassembled sections of two tunnel boring machines that will help dig a $16 billion rail tunnel between North Jersey and Manhattan are on their way to the Garden State. The German-made machines were ...