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原文传递 Innovative Bridge Design/Construction Techniques to Expedite Construction.

题名：	Innovative Bridge Design/Construction Techniques to Expedite Construction.
作者：	MILLER, R. A.
关键词：	Bridge-design; Bridge-construction.;Bridges-Structures; Construction-; Surveys-; Literature-review.
摘要：	This project examined various methods of innovative bridge design and construction techniques to expedite construction. The following methods have been identified as possible methods of reducing the time needed for bridge construction: (a) Precast substructures; (b) Prefabricated composite bridge units; (c) Prefabricated superstructure units, such as adjacent boxes, which do not need a separate wearing surface; (d) Full depth precast concrete decks; (e) Stay-in-place concrete or steel forms; (f) Completely prefabricated bridges; (g) Rapid curing concrete materials. Items 1-6 have been tried in various states and the results of these trials can be found in an AASHTO Technology Implementation Group (TIG) report at www.ashtotig.org. (2) In order to find additional information on barriers to rapid construction, a survey of contractors was conducted. This survey showed that the main obstacle to fast bridge construction is the forming of the deck. The contractors also indicated that the best way to build bridges faster was to allow the entire bridge to be closed and the reconstruction to occur all at one time.
报告类型：	科技报告