Steel tube arch rib vertical lifting method

Abstract

The invention discloses a steel tube arch rib vertical lifting method, which comprises the following steps: separating the steel tube arch rib into two side sections and middle-section closure sections, taking an arch hinge of a side section arch springing as a rotating point and vertically lifting the two side sections of the steel tube arch rib, adopting a temporary support for respectively stabilizing the two side sections on two lifting towers after reaching a set position; lifting the middle-section closure sections of the steel tube arch rib which is butt-jointed and closed with the twoside sections; the side sections and the middle-section closure sections can be split into two to four pieces of processing sections; the maximum weight of all sections is less than 20 tons; and all the sections can be assembled and welded on the spot before lifting. The steel tube arch rib vertical lifting method has the beneficial effects that the method has little constructional investment, clear structural force, shortcut and convenient construction process, and effectively solves the technical problem that the steel-tube arch is transferred and assembled into in a hoisting section in theconstruction process of a little span, low height and first-beam and post-arch arch bridge and the section of the steel-tube arch is arranged in place.

Description

technical field [0001] The invention relates to a construction technology of a steel pipe arch bridge, in particular to a method for vertically lifting a steel pipe arch rib. Background technique [0002] At present, there are four construction methods for steel pipe arch bridges: support method, cable hoisting method, horizontal rotation method, and vertical rotation method. The vertical rotation method is to erect steel towers at the arch foot pier and beyond to perform cable-stayed buckle-hanging rotation. It is generally used for arch bridges with arch first and girder later. For arch bridges with small spans and low heights and beams first and then arches, the bracket method is generally used for construction, but the construction cost of the bracket method is high. Therefore, due to the limitation of site construction conditions and other factors, the traditional cable hoisting and swivel construction technology cannot be carried out for the steel pipe composite struc...

AI Technical Summary

Problems solved by technology

For arch bridges with small spans and low heights and beams first and then arches, the bracket method is generally used for construction, but the construction cost of the bracket method is high

Therefore, due to the limitation of site construction conditions and other factors, the traditional cable hoisting and swivel construction technology cannot be carried out for the steel pipe composite structure of strong beam and weak arch with beam first and arch later. How to transfer and assemble the steel pipe arch into hoisting segments, and how to install the steel pipe arch segments in place, must consider the preparation and implementation of new technical solutions

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