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Tunnel Boring Machines. These massive machines are essentially moving factories that cut through the rock, excavate the waste out of the back, and install the concrete shielding, all while pushing itself along like an inchworm.

Tunnel Boring Machines. These massive machines are essentially moving factories that cut through the rock, excavate the waste out of the back, and install the concrete shielding, all while pushing itself along like an inchworm.

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 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 ...

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

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...

Tunnel boring machine arriving on site

Tunnel boring machine arriving on site

Bertha a 57-foot-diameter tunnel boring machine being disassembled after boring a 1.7 mile long highway tunnel under downtown Seattle [4000  3000]

Bertha a 57-foot-diameter tunnel boring machine being disassembled after boring a 1.7 mile long highway tunnel under downtown Seattle [4000 3000]

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

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

Meccano Tunnel Boring Machine by Laurent Chatté

Meccano Tunnel Boring Machine by Laurent Chatté

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 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.

This is how a tunnel boring machine will burrow a viaduct under Seattle - Autoblog

This is how a tunnel boring machine will burrow a viaduct under Seattle

This is how a tunnel boring machine will burrow a viaduct under Seattle - Autoblog

www.popularmechanics.com technology infrastructure news a24895 seattle-big-bertha-tunnel-boring-machine ?zoomable

www.popularmechanics.com technology infrastructure news a24895 seattle-big-bertha-tunnel-boring-machine ?zoomable

Tunnel Boring Machine (TBM) MRT Jakarta - Berita Engineering 4

Tunnel Boring Machine (TBM) MRT Jakarta - Berita Engineering 4

A small tunnel boring machine in New York City ready to build the Second Avenue subway line [1024x768]

A small tunnel boring machine in New York City ready to build the Second Avenue subway line [1024x768]

'Bertha', the world's largest tunnel boring machine.  She clears a subterranean tunnel that measures 57.5 feet.  How else can we combat the Mole-People?

'Bertha', the world's largest tunnel boring machine. She clears a subterranean tunnel that measures 57.5 feet. How else can we combat the Mole-People?