tailieunhanh - Steel Bridge Construction-2

Steel Bridge Construction Further Illustrations of Bridges Under Construction, Showing Erection Methods Figure Royal Albert Bridge across River Tamar, Saltash, England, 1857. The two 455 ft (139 m) main spans, each weighing 1060 tons, were constructed on shore, floated out on pairs of barges, and hoisted about 100 ft (30 m) to their final position using hydraulic jacks. Pier masonry was built up after each 3 ft (1 m) lift. © 2000 by CRC Press LLC Figure Eads Bridge across the Mississippi River, St. Louis, Mo., 1873. The first important metal arch bridge in the ., supported by four planes of. | Durkee J. Steel Bridge Construction Bridge Engineering Handbook. Ed. Wai-Fah Chen and Lian Duan Boca Raton CRC Press 2000 Further Illustrations of Bridges Under Construction Showing Erection Methods Figure Royal Albert Bridge across River Tamar Saltash England 1857. The two 455 ft 139 m main spans each weighing 1060 tons were constructed on shore floated out on pairs of barges and hoisted about 100 ft 30 m to their final position using hydraulic jacks. Pier masonry was built up after each 3 ft 1 m lift. 2000 by CRC Press LLC Figure Eads Bridge across the Mississippi River St. Louis Mo. 1873. The first important metal arch bridge in the . supported by four planes of hingeless trussed arches having chrome-steel tubular chords. Spans are 502520-502 ft 153-158-153 m . During erection arch trusses were tied back by cables passing over temporary towers built on the piers. Arch ribs were packed in ice to effect closure. 2000 by CRC Press .