SR 826 and SR 836 Interchange: Palmetto & Dolphin Expressways

SR 826 and SR 836 Interchange: Palmetto & Dolphin Expressways


Reinforced Earth Wall Gantry Launching System
Precast Mechanically Stabilized Earth Wall
Location: 
Miami, FL
Owner: 
Florida Dept. of Transportation
Contractor: 
Community Condotte DeMoya JV
 

 

The SR 826 and SR 836 interchange project is one section (Section 5) of the 12 part Palmetto Expressway Improvement Project. The entire twelve part SR 826 improvement project spans along 16 miles of the corridor.   Some of the key improvements made to the intersection include new connections between SR 826 and SR 836 in all directions, adding an additional travel lane by widening or replacing existing bridges, and the addition of frontage roads to reduce local traffic on the main line. The approximate total cost for the section 5 project is $560 million. 
The Reinforced Earth Company (RECo) has already supplied 258,267 sf of permanent MSE wall to the Palmetto Expressway Section 3 project, which is another portion of the overall Palmetto Expressway Improvement Project. RECo will be providing approximately 600,000 sf of additional permanent wall to the Section 5 project.   This Design Build project  is currently being designed by BCC Engineering, and will have roughly 30 MSE walls. RECo was able to meet the project’s aesthetic requirements by providing the “Palm Frond” finish. The Palm Frond finish has also been provided by RECo in several MDX projects throughout the Miami area.
RECo Engineering Department has also been instrumental in helping the design build team meet the stringent project schedule by having shop drawing submittals at times completed in less than one week. The quick turnaround with RECo’s plan submittals, and having significant forms dedicated to each project has proven to be a valuable resource to the Design Build team.
A unique requirement on the Section 5 project is that the contractor has chosen to use a gantry system to install the segmental bridges. The gantry launching system will be located on top of RECo’s MSE wall mass in numerous locations throughout the project. This gantry system will use concrete pads positioned on top of the MSE wall mass to transfer the load of the entire gantry system, in addition to the bridge segments. Due to the significant loading caused by the gantry launching system, the Design Build team has asked RECo to check the effects of loads exceeding 5,000 psf.