Jamestown Verrazzano Bridge, Rhode Island |
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• Construction Engineering• 2400 ton Lifts • Form Travelers• Post-Tensioning Drawings• Technical Assistance
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| Jamestown-Verrazzano Bridge, Rhode Island
CTE staff was responsible for engineering the heavy lift operations for (15) precast approach spans, 167ft (51m) long and weighing as much as 2400 tons each. The work included the checking of the permanent structure for the lifting conditions as well as all equipment design and lift procedures. The sliding bearings were restrained for the lifts. The post-tensioned spans were floated to the jobsite on a barge and lifted into place with six 1000 ton hydraulic jacks. Six additional jacks linked to the permanent structure served as tie-downs to create equilibrium. The highest lift was approximately 130ft (40m). 2ft closure pours connected the spans to the pier segments. More post-tensioning was then installed to lock everything together. The main spans were cast-in-place balanced cantilevers, built with self-launching form travelers. CTE staff performed the design review, inspection and technical assistance for the travelers. Post-tensioning shop drawings and stressing calculations were also provided, together with the necessary system testing and installation procedures.
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