A tunnel boring machine (TBM) also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They can bore through anything from hard rock to sand. Tunnel diameters can range from a metre (done with micro-TBMs) to 19.25 m to date. Tunnels of less than a metre or so in diameter are typically done using trenchless construction methods or horizontal directional drilling rather than TBMs.

A tunnel boring machine (TBM) also known as a "mole", is a machine used to…

Video courtesy of CDM/HMM Joint Venture - For engineering enthusiasts and anyone who's interested in the mechanics of siphon construction, this animation shows exactly how the 110-ton, 300-foot-long tunnel boring machine will drill a distance of nearly two miles, 100 feet beneath the New York Harbor seabed. Find out more about the Staten Island ...

Video courtesy of CDM/HMM Joint Venture - For engineering enthusiasts and anyone who's interested in the mechanics of siphon construction, this animation sho.

A tunnel boring machine that was used at Yucca Mountain nuclear waste repository

A tunnel boring machine (TBM) also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They can bore through anything from hard rock to sand.

A tunnel boring machine (TBM), also known as a "mole", is a #machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. #mining  #getstuffdone

A tunnel boring machine (TBM), also known as a "mole", is a used to excavate tunnels with a circular cross section through a variety of soil and rock strata.

Nuclear Powered Military Tunnel Boring Machines Construct Underground Cities And Nuclear Proof Subterranean Installations--Pictures of $13 Million Boring machine | Alternative

Could mysterious booms be related to the US Army constructing a giant network of Deep Underground Tunnel and Base?

The first of eight highly specialised Tunnel Boring Machines (TBM), which each weigh nearly 1,000 tonnes, is being positioned at Royal Oak in west London...

'Metal moles' begin work below London

Tunnel Boring Machine

Example of the original tunneling boring machine (TBM) used in early subway construction. Later replaced with newer earth pressure balance (EPB) technology boring machines.

Great video explaining the inner workings of a Tunnel Boring Machine. https://www.youtube.com/watch?v=1DrLQGxpj1Q

Crossrail - Ellie TBM begins her final drive. As CrossRail tunnelling nears completion, works turn to other associated parts of Europe's largest construction project.

Tunnel boring machine - Tunnel boring machine at the site of Weinberg tunnell Altstetten-Zürich-Oerlikon near Zürich Oerlikon railway station.

Tunnel boring machine - Tunnel boring machine at the site of Weinberg tunnell Altstetten-Zürich-Oerlikon near Zürich Oerlikon railway station.

Elon Musk's tunnel boring company isn't quite as well-articulated as his other companies, which include the well-established SpaceX and Tesla, and the newly..

Take a look at the first boring machine for Elon Musk’s Boring Company

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