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Damaged bearings in Bertha
Project Related

Bertha Repair Plan Will Involve Vertical Shaft In Front of Machine

February 20, 2014 rockman Project Related Comments Off on Bertha Repair Plan Will Involve Vertical Shaft In Front of Machine

WSDOT announced on Valentine’s Day that the plan to repair the damaged Bertha TBM was not ready yet, as engineers from Hitachi Zosen, the machine’s manufacturer, would need until the end of the month to […]

Excavation and ground freezing by Moretrench for MTA's Second Avenue Subway
Project Related

Ground Freezing and Tunneling for New York MTA’s Second Ave Subway

February 21, 2011 rockman Project Related Comments Off on Ground Freezing and Tunneling for New York MTA’s Second Ave Subway

GeoPrac sponsor Moretrench is a key team member of the Second Avenue subway team, performing ground freezing on a 150-ft stretch of tunnel alignment in preparation for the second tunnel. ENR reports that approximately 7,200 […]

Failures

Himalayan Highway Tunnel Collapses, Trapping 40

November 15, 2023 rockman Failures Comments Off on Himalayan Highway Tunnel Collapses, Trapping 40

The collapse of a Himalayan highway tunnel in Uttarakhand, India, trapped 40 workers, sparking a challenging rescue operation. The incident occurred on November 12, 2023, and the workers are reported to be in good health, […]