A two-way angular displacement accumulative lifting method for steel roofs with irregular free-form surfaces

Abstract

The invention discloses a bidirectional angular displacement cumulative lifting method of an irregular free-form surface steel roof. The bidirectional angular displacement cumulative lifting method comprises the steps that S1, a steel roof structure is divided into a translation lifting unit and an angular displacement lifting unit; S2, the translation lifting unit is assembled according to the designed posture, and the angular displacement lifting unit is laid flat for assembly; S3, the translation lifting unit is lifted; S4, the angular displacement lifting unit is lifted and is subjected toposture adjustment at low altitude; S5, the angular displacement lifting unit is continued to be lifted, and the translation lifting unit and the angular displacement lifting unit are closed and fixed; S6, the lifting and closing and fixing of the translation lifting unit and the angular displacement lifting unit are carried out step by step; and S7, the closed irregular free-form surface steel roof is lifted to the design position overall and is connected with a support or an installed main structure. The bidirectional angular displacement cumulative lifting method can solve the assembly support problem of a large-span and large-area irregular free-form surface steel roof, reduces the construction cost, and improves the construction efficiency and economic benefits.

Description

technical field [0001] The invention relates to the technical field of building construction. More specifically, it relates to a two-way angular displacement cumulative lifting method for irregular free-form steel roofs. Background technique [0002] With the development of basic construction and the expansion of building scale, the shape of buildings is becoming more and more novel and unique, especially in large industrial and civil buildings, such as large exhibition halls, memorial halls, stadiums, hangars, etc., the roof is getting more and more Guangfan adopts a large-span, large-area irregular free-form space steel structure. At present, the installation technology of large-span and large-area space steel structures in China is relatively mature. Commonly used construction methods include: erecting a full house scaffolding, high-altitude loose assembly method; ground assembly, segmented hoisting method; fixed-point assembly, sliding in-place installation method; grou...

AI Technical Summary

Problems solved by technology

However, its disadvantage is that the large-span irregular free-form steel roof to be installed not only has different elevations but also has a large height difference at both ends. It needs to be assembled on the ground before installation. A large number of high-leg support systems and construction scaffolding are erected at a higher position of the design elevation of the lower string, which is not only labor-intensive and time-consuming, but also leads to increased construction costs and loses the characteristics of the overall lifting process

[0004] Another method of large-span irregular free-form steel roof is to assemble the steel roof in pieces on the ground, and then hoist the assembled structures one by one and connect them to the support or the installed main structure. The disadvantage is that each block structure is lifted to the design height separately, and the lifting error is large, and each block structure needs to be adjusted when it is closed. Due to the short distance between the lifting equipment and the lifted structure, the adjustment amount of each block structure is small, and the adjustment It is difficult, time-consuming and labor-intensive, and the workload of high-altitude closing is relatively large, and the risk is high

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