By Zach Thompson, Sr. Project Manager
The project team for the I-75/SR50 Interchange Reconstruction, kicked off the new year with a complicated and highly successful bridge deck pour on the newly constructed I-75 northbound bridge over SR50 in Brooksville, Florida. The selected method of operation required a single pour placement of over 600 cubic yards of concrete along the 298.5’ single span bridge. This operation was performed at night while utilizing a full detour of all SR 50 traffic. The bridge deck pour required two complete pour crews working in unison starting from the center of the bridge outward towards each abutment to ensure symmetrical deck loading. This method was employed to prevent the 12’ tall steel girders from potentially fouling the backwalls due to the release of over 12 inches of camber from the dead load of the concrete deck. Each pour crew employed their own Bidwell, pump truck, dedicated concrete plant, and concrete trucks to support the two distinct but coordinated operations.
The combined team, which included the FDOT inspection staff, concrete supplier (Cemex), and Bidwell subcontractor (Leware), developed contingency plans for material production, delivery, testing, and placement in the event of a plant or equipment break down. With so many moving parts required to operate simultaneously to ensure success, it was inevitable that the team would face at least one challenge requiring a swift decision to be made during at a key juncture of the pour. When of one the pump trucks suffered a mechanical failure during the operation, a standby pump truck was quickly moved into position highlighting the need to have predetermined contingency plans in place to ensure overall operational success. It was this type of detailed planning and commitment from all Team Members and stakeholders that lead to an extremely successful deck pour worthy of the recognition given to the entire project team by FDOT representatives.
Congratulations to the entire Project 2088 team on this outstanding achievement!