RISKY BUSINESS / PROBLEM SOLVED
Mammoet, of global recognition for its innovative solutions to high-stakes obstacles, successfully completed the rescue of the world's largest tunnel boring machine from120ft. below ground.
(Below) Case study and video production by MAMMOET
While the access shaft was being excavated, Mammoet completed the gantry tower and skid base. On March 30th, 2015, the tower gantry raised the damaged cutter drive unit from the shaft in a precision-controlled lift. Using adjustable lifting points to change the lifting position, Mammoet turned the suspended cutter drive unit 90 degrees and installed it onto the repair saddles in a total of 16 hours.
Once repaired, the lifting operation was reversed and the cutter drive unit was carefully lowered back down into the shaft. Through quick response and innovative on-the-go engineering, Mammoet saved the city of Seattle from further delay and inconvenience.