Construction method for lifting arch structure in zero-deformation state

Abstract

The invention discloses a construction method for lifting an arch structure in a zero-deformation state. The construction method specifically comprises the following steps: 1, sectioning a large-span arch structure into floor arch structures and a lifting construction unit; 2, building up a support bed jig, splicing and assembling the lifting construction unit in situ and simultaneously installing the floor arch structures; 3, installing horizontal steel strands, horizontal jacks and tensioning the horizontal jacks to tension the horizontal steel strands; 4, building up lifting frames, installing lifting jacks and vertical lifting steel strands; 5, alternately tensioning the horizontal steel strands and the vertical lifting steel strands level by level so that the lifting construction unit is separated from the support bed jig; 6, lifting the lifting construction unit to a preset height to be in butt joint with the floor arch structures at two sides, thus forming the large-span arch structure; and 7, unloading and disassembling the horizontal jacks, the horizontal steel strands, the lifting jacks, the vertical lifting steel strands and the lifting frames level by level to finish the construction. The construction method has the advantages of high construction accuracy, high quality, reliable safety and low-cost construction measures.

Description

technical field [0001] The invention relates to the technical field of building structure construction, in particular to a construction method for a large-span arched building steel structure. Background technique [0002] Since the ancient Roman period, the arched structure has been widely used in bridges and building structures due to its good mechanical performance and beautiful architectural form. With the development of society and the advancement of science and technology, the use of new materials and new techniques, and the emergence of advanced computing theories and analysis tools, modern buildings, especially those with large-span structures, are moving towards super-high, large-span, unique shapes, etc. The direction of development, and the arched structure is one of the most commonly used structural types in modern architecture. Using the long-span arch structure as the load-bearing structure of the building structure can obtain a large area of ​​column-free ind...

AI Technical Summary

Problems solved by technology

[0003] The following two problems will occur during the installation of the arched structure: one is that the component itself will deform due to its own weight during hoisting, generally the middle of the arch span is deflected downward and the two ends are deformed outward, which will seriously affect the installation accuracy; the other is During the installation of such components, a large horizontal force will be generated on the supporting structures at both ends, which will greatly increase the construction cost of temporary facilities or the underlying supporting structures

This method has disadvantages such as poor construction accuracy, high working surface, poor safety, difficult construction quality assurance and high construction cost.

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