Anti-overturning method for large slab girder vertical assembly

Abstract

The invention relates to the field of steel structure installation, in particular to a large plate beam vertical splicing anti-overturning method. The method comprises manufacturing supports, selecting two vertical splicing large plate beams at the ends and two vertical splicing large plate beams in the middle as positions for installing a flexible support, installing the flexible support and tensioning turnbuckles; installing a connecting beam of the two large plate beams at the ends and the flexible support to enable the two large plate beams at the ends to form a stable structure system; installing the connecting beams and partial flexible supports sequentially with increase of the number of the vertical splicing large plate beams to enable the plurality of large plate beams arranged side by side to be in a stable structure system all the time; when lifting the large plate beams away, removing the connecting beams and the flexible supports one by one, so that the whole large plate beam system is the stable structure system all the time before the final two large plate beams are lifted away. According to the method, the supports are standard parts processed in a factory and can be reused to avoid material waste. At the same time, the large plate beams are connected, and the anti-overturning effect is good.

Description

technical field [0001] The invention relates to the field of steel structure installation, in particular to a method for vertical assembly and anti-overturning of large plate girders. Background technique [0002] In recent years, with the development of the national economy and the construction industry, solid-web large plate girders with large heights and large spans have been used in industrial buildings (especially power plants, steel mills, boiler factories, etc.) and civil buildings (large-span space structures) There are more and more applications in the field. Large-slab girders are generally processed in sections by the factory, and then installed in the way of overall assembly and hoisting at the construction site. During the vertical assembly process of segmental large-slab girders at the construction site, due to the high height, There is a great risk of overturning, especially when the construction site is limited, there may be multiple large slab girders standi...

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Problems solved by technology

[0002] In recent years, with the development of the national economy and the construction industry, solid-web large plate girders with large heights and large spans have been used in industrial buildings (especially power plants, steel mills, boiler factories, etc.) and civil buildings (large-span space structures) There are more and more applications in the field. Large-slab girders are generally processed in sections by the factory, and then installed in the way of overall assembly and hoisting at the construction site. During the vertical assembly process of segmental large-slab girders at the construction site, due to the high height, There is a great risk of overturning, especially when the construction site is limited, there may be multiple large slab girders standing next to each other, which intensifies the analysis of continuous overturning. Currently, the commonly used measures are mainly It is reinforced by welding section steel between large plate girders. The disadvantage of this reinforcement method is that it will cause local damage to the finished steel components, affecting the appearance quality and even the safety quality of the components. At the same time, the structural stability after fixing is not enough.

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