Arch stiffening continuous beam steel pipe arch crown pushing construction technology

Abstract

The invention discloses an arch stiffening continuous beam steel pipe arch crown pushing construction technology. The construction technology comprises the following steps that S1, a temporary support is erected; s2, a pushing sliding system is installed; s3, arch supports and arch feet are mounted; s4, the arch supports and an arch seat are temporarily anchored; s5, the arch feet are pre-tensioned and unloaded; s6, pushing and sliding construction is carried out; s7, an arch foot closure section is constructed; s8, the secondary pouring of the arch feet is conducted; and S9, a sling is mounted and the sling is adjusted. The construction technology has the advantages that the influence of in-situ assembly of the arch ribs and the supports on the existing underpass expressway is solved by adopting the construction method of 'different-position assembly and integral pushing', and the construction time of the overpass expressway can be greatly shortened by adopting different-position assembly and integral pushing sliding construction, so that the influence on passing of expressway traffic is reduced. Meanwhile, after arch rib sections are assembled, prestress is applied to the arch feet, a supporting system is removed after the arch feet are pre-tightened, and the problems that in the sliding process, the stability of the arch ribs on the two sides is poor, and the arch feet are not restrained are solved.

Description

technical field [0001] The invention relates to the field of construction technology of arch-stiffened continuous beams, in particular to a construction technology of arch-stiffened continuous beam steel pipe vault push. Background technique [0002] At present, the construction methods of long-span arch-stiffened continuous beam steel pipe arches are mainly divided into two categories: "with support" and "without support". The assembly of the steel pipe arch is mainly carried out by erecting a cable crane for segmental hoisting and butt joint assembly of the steel pipe arch. The in-situ assembly of the bracket method, whether it is the assembly of the bracket or the erection of the arch rib, is a high-altitude operation, which is prone to falling objects from high places, and causes serious safety hazards to the area below the beam, and the impact period is long. At the same time, the lower area is both There are roads and railways that cannot be closed for construction, w...

AI Technical Summary

Problems solved by technology

[0004] The existing large-span arch-stiffened continuous beam steel pipe arch has the disadvantages of high safety risk, long time, technical difficulty, and difficulty in material transportation and placement during the construction process.

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