Multilayer steel truss fragmented reverse hoisting construction method in arc-shaped frame

Abstract

The invention relates to a steel truss hoisting construction method, in particular to a multilayer steel truss fragmented reverse hoisting construction method in an arc-shaped frame. The multilayer steel truss fragmented reverse hoisting construction method comprises the steps of firstly performing modeling and checking calculation to all of hoisting conditions, utilizing brackets at two ends and a portal frame in the middle as lifting points of an arc-shaped main truss, hoisting the arc-shaped main truss by combining a hydraulic synchronous hoisting technology, connecting sub trusses above two roof trusses and steel beams to form a trapezoid fragmented truss, utilizing the temporality-fixed main truss hoisted in position and the hydraulic synchronous hoisting technology to install roof layer fragmented trusses, dismounting the lifting point of the portal frame of the arc-shaped main truss after the arc-shaped main truss is stabilized, sequentially and inversely lifting multilayer fragmented sub trusses to a bottom layer downward, and then utilizing the main truss, the sub trusses, a truck-mounted crane, a tower crane and leading chains to install other members and finish hoisting of a multilayer steel structure of the arc-shaped frame. The multilayer steel truss fragmented reverse hoisting construction method in the arc-shaped frame has the advantages of achieving hoisting operation in a narrow field or on a building surface, ensuring quality and safety, saving expenses, shortening a construction period and being free of pollution and good in environmental-protection benefit.

Description

technical field [0001] The invention relates to a steel truss hoisting construction method, in particular to a segmented reverse hoisting construction method of a multi-layered steel truss in an arc-shaped frame. Background technique [0002] With the development of the national economy and the diversification of architectural design, more and more space special-shaped steel truss structures are used in various large-scale stadium buildings. It has been developed from the ground to be installed on the roof of the concrete building, and it is cross-constructed with other professions. The space available for hoisting is very small, and the conventional hoisting process cannot solve such problems. [0003] At present, during the construction of steel truss structure buildings, it is difficult to lift the steel truss from bottom to top. Under the condition of narrow space, it cannot be hoisted directly on the reinforced concrete structure floor, and the arc-shaped main truss is ...

AI Technical Summary

Problems solved by technology

[0002] With the development of the national economy and the diversification of architectural design, more and more space special-shaped steel truss structures are used in various large-scale stadium buildings. Developed from the ground to be installed on the roof of the concrete building, cross-construction with other professions, the space available for hoisting is very small, and the conventional hoisting process cannot solve such problems

[0003] At present, during the construction of steel truss structure buildings, it is difficult to lift the steel truss from bottom to top. Under the condition of narrow space, it cannot be hoisted directly on the reinforced concrete structure floor, and the arc-shaped main truss is laterally stable during the hoisting process. It is not easy to control; high-altitude assembly and welding operations and three-dimensional crossing operations are large, requiring a large number of mechanical shifts and supporting tire frames, which are high in cost and low in efficiency; when the segmented truss is lifted and installed, the lateral stability of the arc-shaped main truss is difficult to control ; The problem of easy deformation and instability during the hoisting of multi-level steel trusses

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