By Blanchard, Brian A; Bohuslav, Thomas R; Schneider, Christopher; Anderson, Stuart; Schexnayder, Cliff J; DeWitt, Steven D; Raymond, George; Sheffield, Richard
This experiment occupied with building operations and administration practices to speed up the supply of development initiatives. traveling 5 states from the East to West Coasts, the test crew sought details from DOT employees and contractors on practices that speed up undertaking building. The staff visited with transportation leaders in: 1. Jacksonville and Pensacola, Florida; 2. Birmingham and Montgomery, Alabama; three. Houston, Texas; four. Salt Lake urban, Utah; and five. Sacramento and Oakland, California. Transportation corporation representatives, contractors, providers, and engineering specialists having sped up venture event shared their viewpoints and information at conferences with the experiment crew. The group then evaluated those practices for his or her strength program through different transportation enterprises. The group stumbled on that, for each undertaking tested, the first issue resulting in luck used to be a lively attempt of partnership and collaboration among the DOT and the contractor, including a supportive layout and/or layout method.
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Extra resources for Best Practices in Accelerated Construction Techniques
ALDOT engineers drew on their earlier experience and quickly chose precast concrete for the project. “We gave only a cursory consideration to steel. It would have taken far too long to replace the bridge with another steel-girder structure. 3 Sites of the 2002 and 2004 accidents The second bridge replacement contract included an incentive clause that awarded the contractor $50,000 per day for each day the project was completed prior to December 31, 2004. 3). 3 I-65 bridge replacement cost* (2004) Project Execution The precast concrete girders specified for this bridge replacement required a special design.
Sensitive environmental issues and regulations limited the construction window to four months, May to the end of August. Additionally, falsework was not allowed in the main channel. These restrictions led to the use of a precast, prestressed concrete bridge as the most suitable alternative. Standard precast, prestressed AASHTO box beams 48 inches wide and 39 inches deep, with a 6-inch-thick, cast-in-place reinforced concrete deck were selected. The precast box beams were to be supported on cast-in-place drop bent caps using two elastomeric bearing pads at each end of each beam.
2006 Governor issues State of Emergency Proclamation 15 Jan. 5 million emergency contract to repair bridge 3 Feb. 2006 FEMA declares Sonoma County a disaster area 6 Feb. 2006 Emergency contract amended for removal of existing bridge; Caltrans starts designing replacement bridge Mid-Mar. 2006 Design complete and bid package ready 11 Apr. 2006 New bridge contract awarded: 80 days for construction 12 Apr. 2006 Contractor submits cost reduction incentive proposal (CRIP) to change superstructure Early May 2006 CRIP approved; construction starts 17 Aug.