Steel plate composite girder bridges can exert significant advantages when there are obstacles such as rivers and structures blocking the way.This paper proposes a key technology for the assembly construction of pre-cast bridge decks of steel plate composite girders using the pretensioning method,which can realize the prefabrica-tion industrialization,mechanization and flow-line operation of special-shaped bottom variable cross-section bridge decks:By using a special steel bar binding jig frame,prestressed tendon positioning tooth plates and an in-tegral crane,the problem of precise positioning of steel bars and prestressed tendons in a narrow space has been solved;Through the special-shaped slidable pretensioning method bottom formwork and the adjustable release platform of the jack,the synchronous displacement of the bridge deck and the bottom formwork during the pres-tressed release has been achieved.
维普
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