A nifty BIM-type view of the proposed bored tunnel for Washington SR 99, the tunnel to replace the aging Alaskan Way Viaduct along Seattle’s waterfront. It’s pretty neat to see the piles and foundations for other structures and major utilities as the bore passes by them. A little on the longer size, at around 5 minutes.
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A Novel Approach at Niagara: Robbins TBM Stands Up to Challenging Ground with Custom Lining and Ground Support
This article describes the challenges faced by the World’s largest hard rock TBM (47.2-ft in diameter) as it tunnels through some very difficult geology while constructing a massive tunnel under Niagara Falls for hydroelectric power […]
Failures
Foundation Rig Drills Into Subway Line in Turkey
The video below from X user @githii shows a startling sight: what appears to be a foundation drill rig punched right through the crown of a subway tunnel in Istanbul, Turkey several days ago. Reportedly […]
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Tunnel Proposed to Link Europe and Africa at Straits of Gibraltar
The proposed railway tunnel will link Spain and Morroco underneath the Straits of Gibraltar. The depth of the straits ranges from 1,000-ft to nearly 3,000-ft. To put that in perspective, the English Channel is only 150-ft deep, and the Chunnel is another 130-ft below the sea floor. (Photo by chodaboy)