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.
The Best Products for Tough Jobs You won’t be alone when you buy a Robbins TBM. If you are planning to tunnel through rock, you want a TBM from a manufacturer who will support you as your partner throughout the project, anywhere in the world.
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Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and is the world's largest earth pressure balance tunnel boring machine, at a cutterhead diameter of 57.5 feet (17.5 m) across.
Video courtesy of CDM/HMM Joint Venture - For engineering enthusiasts and anyone who's interested in the mechanics of siphon construction, this animation sho...
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The World's Largest Tunnel-Boring Machine Must Be Saved. Bertha has stalled deep beneath Seattle, leaving the city's planned waterfront renaissance hanging in the balance.
Crossrail will use eight tunnel boring machines (TBMs) to construct the new tunnels under London. These huge machines will work 24 hours a day beneath the st...
The tunnel boring machine, Angeli, breaks through a wall of dirt in downtown Los Angeles and achieves a major milestone in Regional Connector transit Project
Herrenknecht is the world market leader in mechanized tunnelling technology and offers high quality tunnel boring machines for every geology, additional equipment, and services.
On Thursday, leaders christened a tunnel-boring machine that will dig a 5-mile path from RFK Stadium to R Street to help complete the Anacostia River Tunnel System.
Once the tunnel opens, ... The machine completed its tunneling on April 4, 2017 and was fully dismantled and removed from the tunnel on Aug. 23, 2017.