Hoisting construction method for oversized span steel truss of roof of stadium grandstand

Abstract

The invention discloses a hoisting construction method for an oversized span steel truss of a roof of a stadium grandstand. The hoisting construction method comprises the following steps that A construction preparation work is conducted; B temporary supporting frames are mounted; C test hoisting is conducted; D trusses are symmetrically hoisted from two ends to the inner side in a sectioning mode; E concrete is poured into main truss arch feet; F purlins are mounted; G preliminary acceptance and supplement brushing of anti-corrosion and fireproof paint are conducted; H the temporary supporting frames are unloaded; J inspection and acceptance are conducted; and M the temporary supporting frames are dismounted. According to calculation of the hoisting weight and the length of hoisting parts, the large span steel truss is sectioned and assembled on the ground firstly, and then aerial butt joint hoisting is conducted, so that the construction period can be effectively saved, and mounting cost can be effectively reduced. The sectioned steel trusses adopt the temporary supporting frames to conduct temporary support, unloading supporting seats on the top of the supporting frames are welded to the steel trusses, and the load of a mounted main truss is borne by the temporary supporting frames, so that mounting safety of the steel truss is guaranteed, and compared with whole audience supporting frame erecting, cost is greatly saved.

Description

technical field [0001] The invention relates to a construction method for hoisting a steel truss, in particular to a construction method for hoisting a steel truss on the stand roof of an ultra-large-span stadium. Background technique [0002] Under the current favorable conditions of low steel prices, large structural spans, short construction periods, high recyclability, and low comprehensive costs, the utilization rate of steel structures is getting higher and higher. The super-long-span steel trusses over 250m are all arched spans, and the installation methods are mostly high-altitude in-situ bulk method, overall lifting method, sliding installation method, etc. The bulk method needs to be erected full of supports to provide high-altitude shelving of components and workers' operation platform; the overall lifting method requires multiple large cranes to lift at the same time, and the overall deformation control of the steel truss after lifting needs to be considered, and...

AI Technical Summary

Problems solved by technology

These hoisting methods consume a lot of materials, require a lot of manpower investment, have many construction procedures, difficult quality control, high cost, and relatively high safety risks, and the prior art either does not use an unloading device or uses a simple wooden wedge or steel pipe unloading device. On site, the wooden wedges are knocked off in stages, and the steel pipes are cut off by gas cutting. It is difficult to control the unloading accuracy, which is not conducive to the slow and balanced transfer of the overall load of the steel truss to the arch foot and each bearing support.

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