Construction method for roof steel grid frame

Abstract

The invention discloses a construction method for a roof steel grid frame. The construction method comprises the following steps that A1, cranes are arranged along the oval plane circumference and the interior of the roof steel grid frame, and scaffold operation platforms are arranged; A2, segments of the roof steel grid frame are assembled, specifically, each steel grid frame body of the roof steel grid frame is spliced in a segmented mode symmetrically from the south and north directions to the center of a gymnasium, each steel grid frame body is divided into the corresponding five segments, namely the first segment, the second segment, the third segment, the fourth segment and the fifth segment to be spliced; A3, the segmenting-spliced segments of each steel grid frame body are spliced into the steel grid frame body symmetrically from the east and west directions to the center; and A4, the step A2 and the step A3 are repeated, the segmented splicing and hoisting method is stopped when only the middle steel grid frame body needs to be constructed, a high-altitude assembly construction method is adopted for a middle closing segment, and after the closing section is mounted, mounting and construction of the whole steel grid frame are completed. By combining high-altitude assembly and segmented hoisting, the advantages that safety is high, the construction occupied area is small, and the construction period is short and other advantages are achieved.

Description

technical field [0001] The invention relates to a construction method in the field of construction, more specifically to the assembly construction of a large-span steel structure grid, and in particular to a construction method of a roof steel grid. Background technique [0002] Domestic steel structure grid sectional hoisting and high-altitude bulk assembly technology are relatively mature, but both methods have certain defects. The grid truss segmental hoisting is to assemble the grid on the ground layer according to the radian shape of the roof after completion, that is, on the ground On the first floor, set steel pipe temporary supports one by one according to the inclined surface of the welded ball joints of the lower chords of the roof grid to support the lower chord welded balls of the grid, so that the lower bolt ball nodes are on the design arc, and the formed arc is the same as the grid after the roof is completed. After the arc surface of the frame and the roof st...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it takes up the entire atrium site, and the impact time period is long. The steel pipe scaffolding is used to support the platform; The disadvantage of this method is that the number of rods is large, the splicing is complicated, and splicing errors are prone to occur. In addition, the high-altitude loose splicing construction is difficult, the construction speed is slow, and the construction period is long.

Workers carry out splicing operations at heights, and the construction time is long, posing great safety hazards

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