Miami TBM assembled and set to go Sep 2011
Florida Department of Transportation News Release
Its 43ft (12.8m) diameter, 265 tonne cutterhead was lifted and attached to the Herrenknecht TBM ready to bore the first drive of the twin tube Port of Miami highway tunnel. An 800 tonne, 180ft high crane lowered the cutterhead into the launching pit in the median of the MacArthur Causeway on Watson Island.
Once fully assembled the machine will operate as deep as 120ft below the seabed of the Government Cut that separates Watson Island from the county's seaport on Dodge Island.
Cutterhead lifted and...
...fitted to the Mixshield
The machine is procured by the Miami Access Tunnel (MAT) consortium which will design, build, finance, operate and maintain the tunnel in a Public-Private Partnership agreement with the government stakeholders, The Florida Department of Transportation, Miami-Dade County and the City of Miami. The twin-tube highway will provide direct highway access for both cargo and cruise-related vehicles enabling the port to expand its cargo and cruise ship business.
"The TBM is one massive piece of equipment!" said District Six Secretary Gus Pego. The Herrenknecht Mixshield TBM is specially designed for the project. A cargo ship delivered the machine components from Germany in June. Since then, MAT has been preparing the launching pit where the TBM is being assembled. "Fixing the cutterhead into place is certainly a major milestone," said Pego. "It means we are closer to putting this giant machine to work."
The Mixshield is scheduled to start boring by the end of November take about six months to complete the first drive. Once on the port side, it will be partially disassembled to take a u-turn and bore the second tube back to Watson Island.
Both tunnels drives are expected to be complete in 2014.
Thank you for taking the time to share your thoughts and comments. You share in the wider tunnelling community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language professional.