This Paper offers an overview of the precast concrete segmental bridges designed and built in the state of Florida, during the past ten years. Statistical structural parameters, segment manufacturing and erection methods, construction times, costs and problems typically encountered are summarized. Current industry and nationwide design and construction practices are discussed with some suggestions for possible improvements. Over the past ten years, Florida has been a leading State in the design and construction of present segmental bridges. Applications include complex interchange locations and long spans, usually in excess of traditional precast girder construction. With the exception of the main span portion of the New Sunshine Skyway cable stayed bridge, they fall into two groups: either straight span-by-span over water or curved balanced cantilever viaducts at complex interchanges where this technique readily accommodates the varying alignments, spans and maintenance of traffic requirements typical of such locations. Variations in superstructures, substructures and foundation types reflect both project requirements and the philosophies of different designers. In general, span-by-span as opposed to cantilever construction afforded more standardization of precast superstructures, pier shafts and foundations which led to very efficient erection systems. In cantilever construction, spans, segments, piers and foundations varied more according to the application. Most contractors preferred to establish their own yards for present segment production, according to the project size and duration, writing off the costs on each, although some reuse of facilities and equipment was possible. Well made equipment, particularly casting forms, saved time and money despite higher initial outlay. Segment production typically attained a rate of one segment per day per casting cell after an initial mobilization and learning period. In conclusion, segmental bridges have proved to be very successful in Florida. Occasional difficulties afforded opportunities for learning and improvements, not only in segmental bridges, but also in many other areas. The proven record and benefits of segmental technology offer considerable scope for the future. (A)


  • English

Media Info

  • Pagination: p. 381-419
  • Serial:
    • Volume: 88

Subject/Index Terms

Filing Info

  • Accession Number: 00606332
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM