Sutong Bridge is a cable-stayed steel box girder bridge with a main span of 1 088 m.The erection of upper structure adopts geometry control method and requires no change to the unit's size and the structure's none-stress geometry.Before main span closure,the cantilever of girder reaches 540.8 m,the structure state is noticeably influenced by external circumstances,the main span closure face great difficulty.By abstracting the advantage of the pullback method abroad and the domestic temperature-cutting method,a new assistant pullback method have put forward and bring into practice actually.In this paper,the analysis key point of practice conditions,key parameter of practice,main measures of the method and the performance is introduced.
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机译:特别特点◎か海伦·海伦·海伦·海伦·海伦·伊森·伊希格基岛美国在美国天堂天堂天堂地区 - Seiji产量助理大苏苏达苏苏苏达苏打海苏苏海苏苏岛海马海马海马山羊鹤Hyaae Haya Hanada Hayasu-ishistantany yamara苏打水族Hayaku-ashitan Seiji Soda-amhistant Yamara Soda Hayakami Haya Seijima-Hiren-Assistant,Helen-Fharistant,Seigaki,Ishigaki Island,Ishigaki Island in Ethine-College-Leels-Original-Assistant-