Steel box girder combined type lifting system and construction method thereof

Abstract

The invention relates to a steel box girder combined type lifting system and a construction method thereof, and the steel box girder combined type lifting system comprises a junction pier arranged atthe junction of water and land, a pushing support installed on the land and arranged side by side with the junction bridge pier in a longitudinal bridge direction, a main truss structure having one end fixed to the junction pier through a supporting device and the other end anchored to the pushing support through a rear anchoring device, and a lifting device used for lifting the steel box girder and fixed on the main truss structure. According to the steel box girder combined type lifting system and the construction method thereof, the using amount of steel is greatly reduced, girders can be taken out of water, and the passing safety of underbridge navigation in the construction period is guaranteed; the Yangtze River waterway is prevented from being occupied too much; the structure is light, economical and reasonable, the stress is simple and clear, the lifting is stable and uniform, the lifting is continuous and rapid, and the generalization performance is strong.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a steel box girder composite lifting system and a construction method thereof. Background technique [0002] At present, the steel box girder bridge is a common structural form of the bridge, which has the characteristics of light structure weight, high torsional rigidity, good wind resistance stability, and convenient construction and maintenance. [0003] In the related art, in the conventional erection method of steel box girder bridges, the support method is generally adopted, and its main feature is that the steel box girder section between the pier tops is hoisted by a large-tonnage floating crane after the floor support is set up at the junction pier, and then used Bridge deck crane for installation. [0004] However, this method requires a large-tonnage floating crane, which has high requirements for the depth of the water area and is expensive, and the erect...

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Problems solved by technology

[0005] The embodiment of the present invention provides a steel box girder composite lifting system and its construction method to solve the problem in the related art that the bracket method needs to use a large tonnage floating crane, and the erection of the bracket consumes a large amount of steel, which affects the navigation of the water area under the bridge

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