Construction method of complex special-shaped multi-layer grid frame with layered modular assembly technology

Abstract

The invention relates to multi-layer net rack construction methods, in particular to a complex irregular-shaped multi-layer net rack construction method based on a layered modular assembling technology. The construction method comprises the following steps that (1) firstly, small plane units are assembled on the ground; points where welded balls are placed are positioned through a total station, wherein the center lines of the balls and the center lines of pipes are located on the same horizontal plane, pipe fittings and the balls are in middle connection, gaskets are arranged in ball and pipe butt joint ports, and gaps are reserved in the ball and pipe butt joint ports; (2) after small assembly units are assembled, module assembling is performed; (3) modules are welded, wherein after assembling is completed, the modules are welded according to the sequence of welding from main chord members and web members in the middle to the two sides and from inside to outside; (4) the modules are hoisted, wherein each module is provided with five hoisting points, one hoisting point of the five hoisting points of each module is a main rope hoisting point which passes through the gravity center of the corresponding module, and the remaining four hoisting points adjust relative postures of the modules through chain blocks; (5) the modules are hoisted, wherein the modules are hoisted in place through a crawler crane. The construction method can simplify complex irregular-shaped multi-layer net rack construction and improve construction efficiency.

Description

technical field [0001] The invention relates to a multi-layer grid construction method, in particular to a complex special-shaped multi-layer grid construction method. Background technique [0002] Since the "Bird's Nest", the main venue of the 2008 Chinese Olympic Games, there have been more and more large venues with steel structures in my country. In order to pursue the visual effect of the building, these new steel structure buildings have more and more complex structures and more and more peculiar shapes. [0003] For these buildings, the steel structure grid construction mainly includes the following methods: the overall hoisting method, the overall lifting method, the high-altitude sliding method, the high-altitude bulk method, and the block installation method. [0004] Integral (block) hoisting method: According to the structural conditions, hoist the grid structure as a whole across the outside, and use the existing supports or set up auxiliary support tire frames...

AI Technical Summary

Problems solved by technology

Disadvantages of the scheme: the ground occupies a lot of assembly space, and increases the investment of large equipment

Disadvantages of the scheme: On the basis of using the existing ground or floor platform, a large number of full-scale scaffolding is still required, and the construction cost is high; the amount of measures is large, and the period of erecting and dismantling the full-scale scaffolding is long, which is not conducive to the overall construction period; assembly operations or scaffolding platforms occupy The site takes a long time, and other majors are completely unable to construct

Disadvantages of the scheme: high investment in measures to support tire frames and sliding beams, and high construction costs; small construction work area, only working at one end, which is not conducive to the overall construction period; long corridor roof, large sliding distance, and accumulated errors big

Disadvantages of the scheme: it takes a long time to set up the scaffolding platform, and it takes a long time to occupy the internal space and the space is large, which is not conducive to the internal civil engineering and electromechanical installation. This project cannot be completed in such a short period of time; Mechanical investment and extended construction period; if such a large-volume, high-density scaffolding platform is used, the construction cost is too high and the economy is unreasonable

[0008] The grid structure of this project is different from the traditional grid type. The welding balls of the upper and lower chords are all on the same axis, and the facade is double (multiple) layers and side Curved surface modeling, which cannot be constructed according to traditional construction methods