Method for installing abnormal-shape curve steel box girder

Abstract

The invention discloses a method for installing an abnormal-shape curve steel box girder, belonging to the technical field of a longspan bridge. The method for installing the abnormal-shape curve steel box girder comprises the following steps of: 1. manufacturing each section of the steel box girder, pre-assembling, and detecting the lateral welding contraction amount; 2. erecting a temporary bracket, arranging a safety protection facility and a working platform on the temporary bracket, and setting a precamber of the top support of the temporary bracket; 3. measuring and positioning on a pier, hoisting the steel box girder above the working platform, controlling hoisting in position, and integrally measuring and regulating the installed steel box girder; 4. controlling the welding deformation of the steel box girder; and 5. regulating the local line of the steel box girder. The method for installing the abnormal-shape curve steel box girder, which is disclosed by the invention, is convenient to operate, is easy to implement, has the advantages of high construction efficiency, low cost and strong maneuverability, and can be suitable for installing the abnormal-shape curve steel box girder and is easy to popularize; and the installation and the line shape of the steel box girder can be better controlled, and the construction quality is guaranteed.

Description

technical field [0001] The invention relates to a long-span bridge technology, in particular to a special-shaped curved steel box girder installation technology. Background technique [0002] Among long-span bridges, steel box girders are often used for their stable manufacturing quality, large span and convenient erection. The Tatara Bridge in Japan, the Jiangyin Yangtze River Bridge and Haicang Bridge in China, and the second Nanjing Yangtze River Bridge under construction all use steel box girders. Due to steel plate planning and transportation, steel box girders are generally manufactured by factories and construction sites. How to ensure the manufacturing quality and improve the manufacturing efficiency during the construction process; how to ensure the welding quality and meet the alignment requirements will become the key to the success or failure of the steel box girder construction. A lot of steel box girders have been built in the current construction field, and t...

AI Technical Summary

Problems solved by technology

A lot of steel box girders have been built in the current construction field, and their installation technology is becoming more and more mature. However, the installation and construction requirements for special-shaped steel box girders are more difficult, and safety measures need to be improved during the fabrication and hoisting process, and the width and height should be increased. There is no ready-made technology to rely on for linear control of segment and curve segment, and the existing technology can no longer meet the production requirements

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