Restoring a Collapsed Span Over the Skagit River

A Pilot Study of Identifying Execution Plan Differences for Accelerated Bridge Construction

“…In the design phase, depending on the type of accelerated measures adopted for bridge construction, ABC might require designing an entire bridge or prefabricated bridge components (Banks, 2015;Ralls, 2007). The involvement of the contractor and specialty moving contractor in the design is important for successful execution of ABC (Harrington, 2014;Vanek, 2015). Additionally, the designer should be aware of the capability of the contractors involved in the project, and the material availability (Basu, 2005) for the suitable design of an entire bridge or modular bridge components.…”

“…Moreover, the design should incorporate tolerances for the placement of bridge components at the final location; the shop drawings for precast bridge components need to include a drawing of adjacent bridge components to avoid confusion during site installation (Banks, 2015). In addition, it is necessary to design the lifting diaphragms to facilitate site installation (Vanek, 2015). The success of an ABC project relies on proper coordination between the designer, fabricator, and specialty heavy lifting contractor to accelerate the production of critical bridge components, assure the timely procurement of long lead items, and plan for lifting operations (Vanek, 2015).…”

“…In addition, it is necessary to design the lifting diaphragms to facilitate site installation (Vanek, 2015). The success of an ABC project relies on proper coordination between the designer, fabricator, and specialty heavy lifting contractor to accelerate the production of critical bridge components, assure the timely procurement of long lead items, and plan for lifting operations (Vanek, 2015). The layout of on-site construction work, such as the position of the pile foundation and its elevation should be carefully planned to match the dimensions of the prefabricated components (Vanek, 2015).…”

“…The success of an ABC project relies on proper coordination between the designer, fabricator, and specialty heavy lifting contractor to accelerate the production of critical bridge components, assure the timely procurement of long lead items, and plan for lifting operations (Vanek, 2015). The layout of on-site construction work, such as the position of the pile foundation and its elevation should be carefully planned to match the dimensions of the prefabricated components (Vanek, 2015). In addition, there is a requirement of more attention to engineering and manufacturing details, so that all precast components fit perfectly (Carter, 2007).…”

“…The implementation of ABC also requires the use of innovative technology, such as self-propelled modular transporters (SPMT) to remove the existing bridge in case of replacement/renovation and to shift the prefabricated bridge to its final location quickly (Ardani, 2010;Beck, 2012;HNTB, 2014;Ralls, 2007). Depending on the ABC technique used, it might require the use of a hydraulic jacking system to slide the bridge into its final position (Ralls, 2014;Vanek, 2015). Additionally, ABC requires heavy lifting equipment, which necessitates designing a heavy lifting mechanism, as well as site stabilization, using geotechnical solutions for the foundation of such equipment (Beck, 2012).…”