STRUCTURAL ENGINEERING

DRMP was responsible for the design and plans preparation of a two span steel bridge over the Turnpike Mainline connecting on and off ramps of the Turnpike with the SR 710 Connector Road.  The superstructure consisted of two spans of continuous rolled steel girders having span lengths of 81 and 93 feet.  The substructure components of the bridge are comprised of cast-in-place piers supported by drilled shaft foundations.  Design tasks also included miscellaneous structures such as MSE walls, sound walls and traffic signal supports.

 

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DRMP performed all structural design aspects of this project that included four bridge widenings, a replacement bridge and two new bridges.  Included within the project were sound walls, decorative retaining walls, and toll plazas.  One of the two new structures on this project included a braided ramp bridge constrained by roadway geometry that required structural depth to be minimized.  This was accomplished using steel plate girders framed into steel box pier caps supported by both hammer head and straddle piers.  The other replacement bridge is a 156 foot long single span steel plate girder bridge over SR 436.  All other bridges utilized AASHTO concrete beams and deep foundation substructures.

 

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DRMP was responsible for the design and plans production of two pedestrian bridges spanning Lake Mary Boulevard.  Each of the bridges’ main span superstructures crossing Lake Mary Boulevard consists of a single 153-foot span comprised of custom L-shaped prestressed beams.  The custom L-shaped beams included complex design analysis to evaluate prestressing of a no-symmetrical cross section and unique considerations for transporting the members to the site. The main span beams were designed such that the deck slab is supported on the bottom flange of the beams.  The ramps are comprised of ADA compliant precast slabs and landing components supported by cast-in-place columns and footing caps.  The foundations are made up of a combination of pile supported piers in pond locations and shallow spread footings at the remaining locations.  The bridge architecture features a highly decorative safety enclosure and decorative façade panels at the main span piers that reflects the look of the Rialto Bridge in Venice Italy.

 

Project Photos (click for larger view)