拱桥的优越性早为人们所熟知,但随着跨度增大,自重加大,特别是拱脚水平力的增大使墩台工程庞大,限制了拱桥的发展。为此,需要探索新的途径。我国采用转体施工的箱型拱净跨已达200m(涪陵乌江桥),采用劲性钢骨架施工的中承式肋拱净跨已达240m(宜宾小 The superiority of the arch bridge is well known, but as the span increases, the self-respect of the arch bridge increases, especially the increase of the horizontal force of the arch foot, which makes the pier and dock project huge and limits the development of the arch bridge. To do this, we need to explore new ways. China’s use of swivel construction of box arch net span has reached 200m (Fuling Wujiang Bridge), the use of rigid steel skeleton construction of the rib cage span has reached 240m (Yibin small