Method for butting and synchronously unloading segments of steel truss structure in air

Abstract

The invention discloses a method for butting and synchronously unloading segments of a steel truss structure in the air. The method comprises the following steps: (1) manufacturing and mounting a temporary supporting frame; (2) manufacturing and mounting an operating platform; (3) manufacturing and mounting a scaffold; (4) hoisting a truss in position; (5) butting truss segments in the air and permanently fixing; (6) enabling a jack to be in position; (7) mounting a first U-shaped sleeve groove; (8) removing the scaffold, and mounting a lower bearing beam; (9) mounting a second U-shaped sleeve groove; (10) mounting a limiting steel pin rod and a limiting plate; and (11) unloading step by step. The method disclosed by the invention has the advantages that the problem that the quality is difficult to control when a long-span plane truss adopts a segmental mounting method is effectively solved, an unloading process is steady and controllable, the phenomena that the original structure produces larger deflection, local rod pieces are over-stressed, node connection is destroyed and even structure collapse is caused due to an improper unloading scheme can be avoided, and synchronous unloading of the truss structure is realized.

Description

technical field [0001] The invention belongs to the technical field of steel truss construction, and in particular relates to a method for segmental high-altitude butt joint and synchronous unloading of steel truss structures. Background technique [0002] At present, the steel truss structure is developing rapidly. Many airports, stations, stadiums and other buildings are widely using this type of structure. This type of structure usually has a large span and can meet the space requirements of building functions. However, it is difficult to construct and install once For the problem of permanent installation in place, the usual solution is to set up a number of temporary support frames in the span direction of the truss, carry out segmental hoisting, and complete the installation of the entire truss in place by high-altitude docking. This method involves the unloading of the original structure before the removal of the temporary support frame. If the unloading scheme is imp...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art, and to provide a steel truss structure segmented high-altitude docking and synchronous unloading method, which can provide temporary support and tire frame for the high-altitude docking of large-span plane trusses, and effectively solve the problem of large-span It is difficult to control the quality of the planar truss by segmented hoisting installation method. It is unloaded in stages by gradually pulling away the backing plate. The unloading stroke of each level is the thickness of a backing plate. The original structure produces large downward deflection, local member overstress, node connection damage, and even structural collapse, so as to realize the synchronous unloading of the truss structure

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