Research on Key Technologies for Prefabricating Special-Shaped Bottom Pre-Tensioned Bridge Deck Panels Based on the Slippery Bottom Formwork Process
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.
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维普
