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原文传递 Bridge Span Floated On Barges In New Construction Method

题名：	Bridge Span Floated On Barges In New Construction Method
正文语种：	eng
作者：	SHELLEY BYRNE
摘要：	The main span of a new bridge over the Ohio River was built on the riverbank and recently floated in by barge before being lifted into place as part of a new construction technique. On April 26, Excell Marine, working with Dutch subcontractor Mammoet, moved the 830-foot bridge span using two tandem barges and towboats on each end, said Mike Witherow, District 6 construction engineer for the West Virginia Department of Highways. "They were able to construct the arch fairly easily from the land, and then once they assembled the arch they were able to float a barge under each end of the assembly system in the yard," he said. Barge slips built beneath either end of the assembly yard allowed for the lift. The bridge was raised just over 20 feet above the assembly yard's elevation, 40 feet above water, onto bracing before making the 3/4-mile trip downstream, Witherow said. The boats then turned the bridge 90 degrees and headed back upstream, at first anchoring to a pier. The bridge was then lifted another 65 feet and placed on top of the piers. Contractor Flatiron Construction of Broomfield, Colo., came up with the idea of building the bridge on the riverbank and then barging it into place. It allowed work on the tied-arch design to begin before the piers were completed, saving time and money. The method also minimized disruption to river traffic.
出版年：	2021
期刊名称：	The Waterways Jouranl
卷：	135
期：	7