Lifting closure construction method for arch ribs of arch bridge

Abstract

The invention provides a lifting closure construction method of arch ribs of an arch bridge. An arch rib is divided into two arch foot-arch rib sections, an arch rib lifting section and two arch rib closure sections for connecting the arch rib lifting section and the arch foot-arch rib sections. The arch foot-arch rib sections are directly assembled at the designed installation position, the archrib lifting section is assembled on a support below the designed installation position, and the arch rib lifting section is lifted to the designed elevation after assembly and connected with the archfoot-arch rib sections through the closure sections. The arch foot side arch ribs and the arch rib lifting section can be spliced at the same time, and the construction period can be shortened; the arch rib lifting section is machined at a lower position and then lifted to the designed elevation after machining is completed, so that the aerial work amount is reduced, the deformation amount of thearch rib in the horizontal direction and the vertical direction in the lifting process is reduced, and the construction safety and the installation precision are improved.

Description

technical field [0001] The invention belongs to the technical field of construction of steel pipe arch bridges, and relates to a construction method for installing arch ribs by lifting and closing dragons during installation and construction of arch ribs of arch bridges. Background technique [0002] The installation and construction of the arch rib lifting method can process the arch rib at a low position, reduce the construction difficulty, ensure the quality of the arch rib, and the construction of the main girder and the processing of the arch rib can be carried out simultaneously, shortening the construction period, so it is often used in the construction of steel pipe arch bridges. [0003] CN101672011A discloses a method for vertically lifting a steel pipe arch rib. The arch rib is divided into two side sections and a middle section closing section, and the two side sections of the steel pipe arch rib are vertically lifted by using the arch hinge of the side section ar...

AI Technical Summary

Problems solved by technology

The middle closing section of this method is relatively short, and the wind bracing structure cannot be installed, which is not conducive to the integrity of the arch rib and the arch rib wind bracing structure, and the stability of the middle closing section is poor when hoisting

[0004] CN102071644A discloses a method for overall lifting and installation of bridge arch ribs. The arch ribs are hoisted as a whole by setting hoisting brackets at the main pier or arch feet. In this method, the arch rib section of the main bridge part and the construction of the approach bridge interfere with each other and cannot be constructed at the same time , during the lifting process, the structure at the side arch will be subjected to complex stress and have adverse effects

[0005] CN102561191A discloses an overall hoisting system and construction method for the arch rib of an arch bridge. The overall structure and support of the arch rib are erected on a barge, and the risk of transportation and lifting is relatively high, and this method is suitable for the construction method of arch first and then beam, and is not suitable for rigid tied arch bridge

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