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Abstract：The construction of steel viaduct usually processing molding in land area，then be installed in field by crane ship.
This paper introduces the steel bridge installation method，rigging stress calculation and selection，condole seat technology and
correction of deviation in the second project of Caofeidian Ore Terminal. It proves that using block-hook and condole seat
technology and long-short button method for installing deviate steel viaduct are successful.
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