Construction technology for hoisting large-size steel truss roof from two outer sides

Abstract

The invention discloses a construction technology for hoisting a large-size steel truss roof from two outer sides. The construction technology includes the following steps: a, performing constructionpreparation; b, performing primary truss hoisting installation preparation; c, performing primary truss ground assembly; d, performing cycled hoisting on a primary truss from two outer sides in stepsand performing installation; and e, installing a secondary truss according to an installation position of the primary truss. In construction, hoisting devices stand outsides and near two ends of a spatial steel truss to perform hoisting, the hoisting rated capacity demand of the hoisting devices is greatly lowered, the use efficiency of the hoisting devices is improved, and indoor places can be avoided; conflicts of crossed construction between on-site assembly and building of the spatial steel truss and lower other professional workers can be avoided; scaffolds and bearing supports can be avoided; and the construction technology is suitable for assembly and building of the spatial steel structure having a curved or irregular supporting seat, and can reduce the project cost.

Description

Technical field [0001] The invention belongs to the technical field of large-span building structures, and specifically relates to a construction process for lifting and installing a large steel truss roof across the outer sides of the building. Background technique [0002] In order to meet the needs of people's life and industrial production, large-span space steel truss structures are used more and more. At the same time, in order to save land, large-span building structures are increasingly adopting underground structures. [0003] With the emergence of new fabricated construction technology for building steel structures and large-scale hoisting machinery and equipment, and through the assembly and implementation of large-span space steel trusses, a variety of mature construction techniques have been formed, such as cumulative sliding construction and full building support The rack is used for high-altitude bulk construction, segmented hoisting construction, lifting constructio...

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Problems solved by technology

Each of the above-mentioned assembly constructions has certain advantages, but there are also certain deficiencies. The cumulative slip construction needs to set up multiple slip beams and the slip beams should be distributed in parallel straight lines. For the support of space steel trusses, parallel straight line distribution cannot be formed. It is difficult to adopt the accumulative slip construction technology for space steel trusses; the high-altitude bulk construction technology of erecting full hall support frames has defects such as auxiliary measures, high construction costs, and long construction periods, and also affects the cross-implementation of related specialties and types of work; The hoisting construction process requires local load-bearing support frames to be erected indoors, and sometimes mobile lifting equipment needs to be arranged indoors, which restricts the use of this process when there is a basement or indoor concrete floor whose strength is difficult to meet the use of mobile lifting equipment ; The upgrading construction process also needs to occupy the vertical projection area of ​​the lower part of the space steel truss to be installed. For the space steel trusses with floor structures or spectator stands in the lower part, the assembly site cannot be provided because of the lower ground, which leads to the inability to upgrade the construction process. meet the construction

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