Installation Method of Steel Box Girder of Hybrid Continuous Rigid Frame Bridge

Abstract

The invention discloses an installation method of a steel box girder of a hybrid beam continuous rigid frame bridge and relates to the field of steel box girder installation. The method comprises thefollowing steps: the steel box girder to be installed is divided into a plurality of assemblyable steel box girder sections, and the construction of a first concrete girder, a second concrete girder and hybrid joints is performed; two deck cranes are hoisted onto the first concrete girder and the second concrete girder separately, and all the steel box girder sections are hoisted onto the first concrete girder; the steel box girder sections are assembled into the steel box girder; a sliding device is laid on the first concrete girder, and a nose girder is additionally arranged on the end, nearthe second concrete girder, of the steel box girder; the steel box girder is pushed until the two ends of the steel box girder are aligned with the hybrid joints on the first and second concrete girders separately; and the nose girder and the sliding device are removed, the steel box girder is lifted by using the deck cranes, the steel box girder is lowered, the steel box girder is placed betweenthe two hybrid joints, welding is performed, and operation is completed. The installation method can reduce the cost, improve the construction efficiency and ensure the safety.

Description

technical field [0001] The invention relates to the field of steel box girder installation, in particular to a method for installing a steel box girder of a continuous rigid frame bridge with mixed girders. Background technique [0002] Hybrid beam generally refers to the main beam consisting of two forms of concrete beam and steel box girder. The main girder of existing long-span continuous rigid frame bridges often adopts the form of hybrid beams, that is, the fulcrum and certain areas on both sides adopt the form of concrete beams, and the mid-span area of ​​the main span adopts the form of steel box girders. [0003] In the existing hybrid girder continuous rigid frame bridge, the construction method of the mid-span steel box girder mainly adopts the overall hoisting method of large segments. This construction method needs to use a large-tonnage transport barge to transport the steel box girder, and a large-tonnage bridge deck crane or a large floating crane is required...

AI Technical Summary

Problems solved by technology

This construction method involves a large number of water operations, which greatly reduces the safety and efficiency of construction in sea areas where strong winds and waves occur, and the construction time is also subject to weather conditions; at the same time, large-tonnage construction vessels are required for transportation and hoisting. high construction cost

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