Span-by-Span Erection of Precast Segmental Bridges: Underslung Self-Launching Gantries

Span-by-span erection is the most common construction method for precast segmental bridges, and the underslung gantries are the simplest, least expensive, and sometimes most efficient self-launching machines for span-by-span erection. In 21 pages, the eManual provides exhaustive coverage of span-by-span erection of precast segmental bridges with underslung self-launching gantries. It explores the loads, kinematics, support and launch systems, and performance and productivity of these machines. It also discusses span assembly, the stiffness interactions to consider for the design of piers and superstructures, and staged application of post-tensioning to avoid decompression of epoxy joints and the risk of brittle span failure. Introduction Loading, kinematics, typical features Support, launch and lock systems Performance and productivity Structure-equipment interaction References The eManual provides exhaustive coverage of the topic for bridge owners, designers and construction professionals interested in span-by-span construction of precast segmental bridges. Other monographs of the eManuals Project discuss segment fabrication, the span assembly operations common to all families of self-launching gantries, and the other types of self-launching gantries used for span-by-span construction. The collection Span-by-Span Construction of Precast Segmental Bridges (134 pages) provides exhaustive coverage of the topic, ranging from segment fabrication by short- and long-line casting to the different types of self-launching gantries used for span erection, and is offered with 10% discount on the cover price of the five eManuals. This purchase comes with one month of complimentary access to the exclusive articles and free publications of the Bridge Club. See below a selection of related articles.