Photo credit: EarthCam
BETA is currently serving as the design engineer to the general contractor MIG Corporation for this design-build project to replace six bridge superstructures carrying Interstate 95 over local roads.
The bridge carrying I-95 over Toll Gate Road has a single span of 79′. The overall width of the bridge varies, but averages 176′ overall, and is divided into independent superstructures for the northbound and southbound roadways with a longitudinal joint separating them. The existing 36″ steel beams will be replaced with 33″ steel beams to improve the vertical clearance. In conjunction with MIG, BETA proposed changes to RIDOT’s Base Technical Concept Plans that includes switching from three-phase to two-phase construction and replacing the superstructure using heavy lift construction. The superstructures will be assembled next to the existing bridges and transported into place using self-propelled modular transporters (SPMTs).
The bridge carrying I-95 over Centerville Road has two simple spans of 76′ each. The overall width of the bridge is approximately 176′ and is divided into independent northbound and southbound superstructures. The existing 36″ steel beams will be replaced with 24″ beams in order to increase the vertical clearance under the bridge. As with the bridge over Toll Gate Road, BETA and MIG proposed changes to RIDOT’s Base Technical Concept Plans including switching from three-phase to two-phase construction and switching from prefabricated bridge units (PBUs) to heavy lift with SPMTs. The deck joint over the pier will be eliminated with the use of a cast-in-place link slab.
The project is designed to maintain travel in each direction on I-95 during construction, with traffic diverted to the opposite barrel during bridge moves.
Because of lengthy lead times for structural steel, framing plans and steel details were developed for early release in order to maintain the aggressive schedule of this design-build project.