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原文传递 Deck Replacement with Precast Reinforced Concrete Segments. Final rept.

题名：	Deck Replacement with Precast Reinforced Concrete Segments. Final rept.
作者：	WENZLICK, J.
关键词：	Bridge-decks; Reinforced-concrete.;Girders-; Design-; Concrete-structures; Composite-materials; Highway-construction; Replacement-; Pavement-overlays; Flanges-; Missouri-.
摘要：	The deck to be replaced in this project was on Bridge No. A0894, known as the Nemo Bridge. It was built in 1960 by the US Army Corps of Engineers over Pomme De Terre Lake. This 1698 feet long steel bridge had wide flange girders with a 7 inches thick composite reinforced concrete deck only 22 feet wide. A preliminary survey showed that over 60%of the deck concrete was delaminated at the rebar level and that the deck needed replaced. HNTB Company, the rehabilitation design consultants, had originally designed the deck to be built by conventional methods one lane width at a time, which would have taken 2 years and required one-way traffic on the bridge during the whole construction. The narrow lane would not allow emergency vehicles or school busses to cross. Closing the bridge would have caused a 30-mile detour. The Bridge Maintenance Engineer in MoDOT's Springfield District, David O'Connor, came back from a National Prefabricated Bridge Elements Conference in St. Louis and suggested to the project manager using full thickness pre-fabricated deck panels to speed up the construction of the Nemo Bridge.
报告类型：	科技报告