Thrust and Guide Devices for Launched Bridges
Publication: Journal of Bridge Engineering
Volume 5, Issue 1
Abstract
Incremental launching is a competitive construction method for medium-span (40–65 m) prestressed concrete bridges. It does not constrain the length and width of the superstructure, and bridges longer than 1 km and wider than 20 m have been successfully launched. This method is hardly constrained by the bridge layout, as varying plan curvatures can be solved by shifting launch supports and varying vertical curvatures by shimming the bottom edges of the superstructure. The launch of a prestressed concrete bridge involves enormous forces and requires the guide and control of big volumes. The devices used for this purpose are described along with their design criteria and optimum fields of utilization, and several suggestions derived from many years of launching practice are given.
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References
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 5 • Issue 1 • February 2000
Pages: 75 - 83
History
Received: May 18, 1998
Published online: Feb 1, 2000
Published in print: Feb 2000
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