Every tunneling machine needs its cutting tools replaced every now and then. But the challenge is keeping a giant machine sharp while a wall of waterlogged earth looms in front. Welcome to the world of hyperbaric interventions, where crews used compressed air to stabilize the ground and safely complete this high pressure work. This video takes you 200 feet underground for a rare look at hyperbaric work inside Seattle’s SR 99 tunneling machine, Bertha. [Source: WSDOT YouTube Channel. Image: YouTube]
Related Articles
Attempting to Remove the Pipe Blocking Bertha
January 14, 2014
rockman
Project Related
Comments Off on Attempting to Remove the Pipe Blocking Bertha
Tunneling Starts in Toronto Subway Improvements with 1st of 4 TBMs
June 26, 2011
rockman
Project Related
Comments Off on Tunneling Starts in Toronto Subway Improvements with 1st of 4 TBMs
Drilling Expected to Start in Miami Port Tunnel Project
November 9, 2011
rockman
Project Related
Comments Off on Drilling Expected to Start in Miami Port Tunnel Project