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

'Voracious worms nibbling their way under London' for the Crossrail project.

'Metal moles' begin work below London

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

Gotthard Base Tunnel - Wikipedia, the free encyclopedia

Gotthard Base Tunnel - Wikipedia, the free encyclopedia

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.

The World's Largest Tunnel-Boring Machine Meet the 25,000-horsepower Bertha.

The World's Largest Tunnel-Boring Machine Meet the 25,000-horsepower Bertha.

Here’s our first glimpse of Elon Musk’s tunnel boring machine - The Verge

Here’s our first glimpse of Elon Musk’s tunnel boring machine

Here’s our first glimpse of Elon Musk’s tunnel boring machine - The Verge

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