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一、概况日本佐贺县城西部70公里,跨越外津海湾,首次用新悬臂施工法架设了一座钢筋混凝土拱桥。桥址处海深20米,宽160米,拱桥跨径170米,并用无支架施工。迄今所建成的钢筋混凝土拱桥,几乎全采用有支架施工。只有少数的拱桥例外,如奥地利的Niessenbach-桥和南非的Vanstadent-桥,它们的拱肋采用了斜拉索和辅助塔架的悬臂施工法完成的。本文介绍采用新的悬臂施工法的外津桥的要点。
I. Overview Japan 70 kilometers west of Saga County, across the Gulf of Tianjin, the first new cantilever construction erection of a reinforced concrete arch bridge. Bridge site at a depth of 20 meters, 160 meters wide, arch bridge span 170 meters, and with no bracket construction. To date, the reinforced concrete arch bridge has been constructed using almost all the supports. Exceptions are the few arch bridges, such as the Niessenbach-Bridge in Austria and the Vanstadent-Bridge in South Africa, whose arch ribs are made using cantilever construction of stay cables and auxiliary towers. This article describes the main points of the Waijin Bridge using the new cantilever construction method.