This time-lapse video captures the difficult and challenging work to disassemble the world’s largest-diameter tunneling machine. For four months, crews cut, hoisted and trucked away 8,000 tons of the machine’s equipment and steel, removing it from inside the tunnel it had built. Up next – finishing the double-deck highway inside and installing all the operating systems to open Seattle’s new SR 99 tunnel by early 2019.
View from a drone inside a tunnel executed by Bertha
Horizontal directional drilling
How a Tunnel-Boring Machine Drills Underground
Vertical Shaft Sinking Machine
Pipe jacking with hydroshield - Azerbaijan project
Pipe jacking with open shield
Inspection of the hydroshield cutting tools