Construction Technology Research of Bridge Deck Structure of the Inclined Section Steel Box Girder Basket Handle Arch Bridge
Combined with the bridge deck structure of the inclined section steel box girder basket handle arch bridge,and taking the Fujiang Bridge of Mianyang Science and Technology City as the engineering background,the two technical problems encountered in the construction of the bridge deck structure of this type of bridge are analyzed:the outer support of the inclined section main beam is separated and the inverted T-shaped beam is buckled out of plane.Then,the disposal measures are put forward innovatively through analysis and research:the measures of setting the pre-deflection angle of the main beam can solve the problem of the void of the outer support caused by its inward deflection when assembling the inclined section main beam,and the calculation formula and setting method of the pre-deflection angle of the main beam are provided.By adding support and active jacking in the mid-span of the beam,the out-of-plane stability of the beam is greatly improved to ensure that it will not lose stability during the construction process,and the lower limit of the jacking force that meets the stability requirements is given based on numerical simulation.The two construction technologies proposed in this paper have been successfully applied to the Fujiang Bridge in Mianyang Science and Technology City,which ensures the smooth assembly of the bridge deck structure of the first inclined section steel box girder basket handle arch bridge in China.
steel arch bridgedeck structurepre-deflection anglecrossbeam bucklingscaffoldlifting force
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