Port of Miami Tunnel - A Solution to Help Alleviate Congestion

Port of Miami Tunnel - A Solution to Help Alleviate Congestion


Construction of Hex Panel MSE Wall
Reinforced Earth Product in Field
Location: 
Miami, FL
Owner: 
Florida Dept. of Transportation
Contractor: 
MAT Concessionaire, LLC
Subcontractor: 
Bonn J Contracting

 

The Florida Department of Transportation determined the installation of a tunnel connecting the Port of Miami directly with I-395 would be an appropriate solution to help alleviate the congestion created from traffic leaving the Port and going through downtown. A 43-foot diameter tunnel boring machine (TBM) will be specifically built for this project and used to install the tunnels. 
The project will also include widening the MacArthur Causeway Bridge, which includes a Reinforced Earth MSE wall. 
 
In July of 2010 Bonn J Contracting, a Subcontractor to MAT Concessionaire, LLC, awarded The Reinforced Earth Company (RECo) the contract to supply and design 10,000 SF of MSE walls for the project. The existing MSE structures on the project comprised of Hexagonal shaped panels with a fracture fin finish. In order to maintain the overall aesthetical appearance of the bridge RECo match this existing wall panel shape and finish. 
 
Since the area of the new MSE walls were considered to be within an aggressive environment RECo designed the structures utilizing its high-tenacity polyester based soil reinforcement or “geostrap®”. Due to the required drilled shaft installation, RECo provided a temporary wire faced wall, also designed with geostrap reinforcements, to allow simultaneous construction of the wall and drilled shaft. Once the drilled shaft installation was complete, the remaining sections of the MSE wall located around the drilled shaft were able to be installed.  
 
A temporary ramp wall was also need for to allow access for construction vehicles from Watson Island up to the MacArthur Causeway Bridge. Since this structure was subject to significant loadings from construction vehicles, Terratrel wire wall system, which using High-Adherence steel reinforcing strips was chosen.   
 
Construction on the Port of Miami Tunnel project began on May 24, 2010 and is scheduled to be completed in 2014.