【摘要】 广东伶仃洋跨海大桥非通航孔桥桥型采用８０ｍ、５０ｍ跨预应力混凝土箱梁预制，安装先简支后连续的设计、施工方案，通过对设计方案的介绍，指出简支转连续梁桥在规模宏大的非通航孔桥桥型方案比选中的可行性与优越性。特别是８０ｍ跨等截面简支转连续箱梁桥的设计与施工在国内尚属首创，许多问题应进一步加以研究、探讨。更多还原

【Abstract】 The design of the unnavigable channel bridge over Lingdingyang is a precast PC box beam with 80 m and 50 m span.It is simply supported and then continuous.The possibility and advantage of simple continuous beam bridge in the selection of the large scale unnavigable channel bridge are marked out.Especially the design and construction of the 80 m span equal section simple continuous box beam bridge is first adopted in our country,so a lot of questions need to be deeply researched and discussed.更多还原