Specialized in civil, structural, and transportation projects
Alexander Hamilton Bridge, Cross Bronx Expressway, Ramp...
Project Owner :
     New York State Department of Transportation
Location :
     Bronx, New York
Client(s) :
     New York State Department of Transportation
     Subconsultant to CCA Civil Inc., Halmar JV
Services :
     Bridge Engineering
    
    
Project Name   
Alexander Hamilton Bridge, Cross Bronx Expressway, Ramp “D” Temporary Bridge 5A

Project Description

This $417 million project, the largest single completed construction project by the NYSDOT, involved the re-decking and repairs to the superstructure steel of the Alexander Hamilton Bridge (AHB) and associated ramps. For the re decking extensive, staging was involved, including permanent lane closures and temporary structures. Three temporary ramps were constructed to maintain the traffic at various stages of construction.

SJH prepared design drawings and specifications for Temporary Ramp “D” and the associated substructures. The contractor opted to use steel for all temporary structures, so the temporary ramps are steel structures, with steel plated decks (“Battle Deck”) supported by steel floorbeams and stringers. The floorbeams and stringers are welded plate girders. Some of the spans of the temporary structures were eliminated by installing Geosythetic Reinforced Earth System (GRES) walls. Reinforced concrete pedestals were installed on top of these GRES walls and the stringers supported by them. The bearings, removed from the original Alexander Hamilton Bridge, were repurposed for the temporary ramps. 

The temporary ramp is supported by temporary steel towers on concrete foundations. The towers are braced laterally with other adjacent existing piers and substructures. The ramps were designed in accordance with AASHTO ASD. The designs were reviewed and approved by NYSDOT. The designs were reviewed and approved by NYSDOT. This project won the 2014 Construction Achievement Project of the Year Award by ASCE Metropolitan Section and the ACEC NY’s Engineering Excellence Gold Award in the Structural Systems category. 


 
Project Images