Vertical rotating and lifting construction method of steel structure arch rib

Abstract

The invention discloses a vertical rotating and lifting construction method of a steel structure arch rib. The vertical rotating and lifting construction method of the steel structure arch rib comprises: constructing bridge piers and each temporary foundation, installing temporary rotating hinges on arch springing embedded sections of the bridge piers, erecting a tower and arranging lifting devices at the top of the tower; assembling first main arch sections and second main arch sections, installing main body sections of the second main arch sections, and hinging one ends of the first main arch sections and one ends of the second main arch sections to the corresponding temporary rotating hinges; installing an anchorage, synchronously vertically rotating and lifting the first main arch sections, and monitoring the horizontal displacement of the tower; supplementarily installing interference sections, connected with the main body sections, of the second main arch sections; synchronouslyvertically rotating and lifting the second main arch sections, and carrying out monitoring; installing closure sections, and supplementarily installing the temporary rotating hinges; uninstalling thelifting devices; and constructing concrete side arches. According to the vertical rotating and lifting construction method, a bridge rib is divided into five sections and assembly is carried out on the ground, the installation quality is high, a main arch is divided into two sections for vertical rotating and lifting, the stress of each stress point and the tower is constantly monitored during thevertical rotating process, the difficulty of lifting is reduced, the construction is easy, the construction period can be effectively shortened, and the safety and stability of the lifting process are guaranteed.

Description

technical field [0001] The invention relates to the technical field of bridge construction methods, in particular to a construction method for vertically rotating and lifting steel structure arch ribs. Background technique [0002] At present, the construction scheme of the arch rib of continuous steel structure arch bridge in China often uses the overall hoisting scheme of cables. During the construction of the bridge, the main or all assembly, welding and painting of the arch bridge are carried out prior to the ground, which can reduce the workload of high-altitude operations and improve The construction efficiency ensures the quality of the bridge. However, due to the overall hoisting construction method, firstly, because the total weight of the arch bridge is very large, a large-tonnage cable crane is required; And the ground anchor, the cost is high, the construction safety is low, and the synchronization requirement in the hoisting process is high, and the construction...

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Problems solved by technology

[0002] At present, the construction scheme of the arch rib of continuous steel structure arch bridge in China often uses the overall hoisting scheme of cables. During the construction of the bridge, the main or all assembly, welding and painting of the arch bridge are carried out prior to the ground, which can reduce the workload of high-altitude operations and improve The construction efficiency ensures the quality of the bridge. However, due to the overall hoisting construction method, firstly, because the total weight of the arch bridge is very large, a large-tonnage cable crane is required; And the ground anchor, the cost is high, the construction safety is low, and the synchronization requirement in the hoisting process is high, and the construction is difficult

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