Construction method for large-span roof truss

Abstract

The invention provides a construction method for a large-span roof truss. The construction method comprises the following steps that the position of a temporary supporting frame is determined; then the hoisting sequence and the hoisting route of each section of sectional hoisting piece are determined; a temporary supporting assembly is mounted on a floor structure steel beam; multiple pressure bearing pieces are mounted on the temporary supporting assembly; the multiple sections of sectional hoisting pieces and embedding rods are sequentially hoisted on the multiple pressure bearing pieces correspondingly, and are assembled in the high altitude; and after a truss structure is assembled, the temporary supporting assembly is disassembled, wherein the disassembling step comprises the following sub-steps that the pressure bearing pieces are cut off, the height of cutting off of each time is controlled according to the unloading displacement amount of the supporting position until the trussstructure does not generate the downward displacement after cutting off of a certain time is completed, and then the temporary supporting assembly is removed. According to the provided construction method for the large-span roof truss, the truss deflection is adjusted through a method of cutting off the pressure bearing pieces multiple times, so that slow movement of all the parts of the truss structure is facilitated, and the unloading precision can be quite conveniently controlled.

Description

technical field [0001] The invention belongs to a truss hoisting construction method, and more specifically relates to a large-span roof truss construction method. Background technique [0002] When the top of the roof structure is a long-span truss, the selection of the installation scheme of the long-span steel beam and truss is the focus and difficulty of steel structure installation. Most of the existing schemes are integral lifting method, sliding installation method and so on. These hoisting methods have higher costs, greater safety risks, and require a larger construction site. And for the adjustment of the vertical deflection deformation during and after the installation of long-span trusses, most of the existing technologies use wooden wedges as unloading devices. A certain displacement, but using wooden wedges to adjust the overall deflection of the truss structure is difficult to control the unloading accuracy, which is not conducive to the deformation of the ov...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a large-span roof truss construction method, which aims to solve the problem of using wooden wedges to adjust the overall deflection of the truss structure, which is difficult to control the construction quality and is not conducive to the deformation of the overall deflection of the truss structure

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