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Rapid Bridge Construction: Prefabricated Substructure Elements

Rapid Bridge Construction: Prefabricated Substructure Elements AASHTO RAC High Value Research Workshop July 27, 2011. Rapid Bridge Construction: Prefabricated Substructure Elements Overview. The use of precast substructure components for bridges offers several potential benefits in Wisconsin

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Rapid Bridge Construction: Prefabricated Substructure Elements

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  1. Rapid Bridge Construction: Prefabricated Substructure Elements AASHTO RAC High ValueResearch Workshop July 27, 2011

  2. Rapid Bridge Construction: Prefabricated Substructure ElementsOverview The use of precast substructure components for bridges offers several potential benefits in Wisconsin • Faster bridge construction times • Reduced exposure of workersto safety hazards • Less environmental interference during construction • Fewer weather delays

  3. Rapid Bridge Construction: Prefabricated Substructure ElementsGoals and methods Propose, implement and evaluate a precast substructure system suitable for Wisconsin • After considering several elements, the project focused on abutment panels and caps for piers and piles • WisDOT conducted a pilot program with precast elements on the U.S. 63 bridge over the Rush River

  4. Rapid Bridge Construction: Prefabricated Substructure ElementsFindings On-site time savings were substantial • For a 96-foot span, placing the precast concrete abutment system took only 10½ hours for four workers • A comparable cast-in-place system would have required the same workers two weeks to place Cost was an issue • The need for a high-capacity crane drovecosts higher than expected; investigatorsrecommend lower element weights forfuture projects

  5. Rapid Bridge Construction: Prefabricated Substructure ElementsOutlook Costs should drop and expertise should improve as contractors get more experience with these methods. WisDOT intends to try this technique severaltimes before precastingother substructure elements.

  6. Rapid Bridge Construction: Prefabricated Substructure ElementsFor more information • Wisconsin Highway Research Program project 0092-07-08, Rapid Bridge Construction Technology: Precast Elements for Substructures • http://www.whrp.org/research-areas/structures/structures_0092-07-08.html • Daniel Yehdaniel.yeh@dot.wi.gov(608) 267-6977

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