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- W2187446893 abstract "This paper describes details and procedures used for the replacement of a rolling leaf bascule span with a new vertical lift span to increase the marine channel width. The primary challenge was maintaining the high volumes of rail and marine traffic with only minimal interruptions during construction. The existing concrete arch spans dating to the early 1900’s would remain as the approach spans to the new lift span. The new lift span tower piers were designed to replace the abutments for the arch spans as well as to support the new lift bridge. Building the new pier foundations included driving piles through holes cored in the arch spans, and provision of a temporary sheet pile/tie rod system to stabilize a narrow strip of railroad track across remaining portions of the arch spans. The new 383-foot long steel truss lift span was erected on land and then transferred to a barge for floating into position between the new towers. The span change-out operation included setting the new lift span in position adjacent to the bascule span with only inches between the two spans. This close alignment required removal of the rack and pinion of the bascule on one side to allow enough clearance to set the lift span. The sequence then required operation of the bascule on the single remaining rack and pinion, before the bascule span was floated out basically intact on the same barge used to float in the lift span. This paper provides perspectives of the Railroad, the design engineers, and the construction contractor." @default.
- W2187446893 created "2016-06-24" @default.
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- W2187446893 date "2013-01-01" @default.
- W2187446893 modified "2023-09-24" @default.
- W2187446893 title "Replacement of the Movable Span of the Galveston Causeway Railroad Bridge over the Intracoastal Waterway" @default.
- W2187446893 hasPublicationYear "2013" @default.
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