The Vermont Agency of Transportation (VTrans) installed a Composite Arch Bridge (CAB) system, known as Bridge-in-A-Backpack™, on a low volume road in a rural setting. The value of using this system is the potential to use smaller and lighter construction equipment for a restricted delivery location such as forest or farm roads. The CAB does not require large cranes and there is a potential for in-field fabrication of the tube arch members where large truck delivery is limited. Advantages of the system include good waterway characteristics and suitability for ledge controlled or spread footing foundations. Disadvantages of the system are that few have been constructed and that it has aesthetic limitations. The construction of the Fairfield, VT CAB project proceeded smoothly. Generally, site conditions and limited experience with the CAB led to less than ideal means and methods for construction of the system. During construction, it was noted that several opportunities remain for further expedited construction and cost reduction. Observed performance has shown a stable and well preforming structure, with expected benefits including reduced chloride effects and reduced maintenance through its service life. Generally, VTrans’ experience with the CAB showed that the system provides a benefit to the State.
Accelerated bridge construction (ABC) is a solution for upgrading substandard bridges that reduces construction and closure times and minimizes exposu...
Iowa State University. Institute for Transportation
2015-07-01
Abstract:
This Participant Handbook accompanies the Slide-in Bridge Construction workshop presentations. It is intended to help participants in any or all of si...
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United States Department of Transportation
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