Construction method for integrally sliding large-span steel pipe arch of curved bridge

Abstract

The invention relates to a construction method for integrally sliding a large-span steel pipe arch of a curved bridge, belonging to the field of bridge engineering construction. The method comprises the following steps: firstly, carrying out on-site splicing and welding on the manufacturing and installing sections of a steel pipe arch to form a large hoisting section; then installing a temporary arch-splicing support on a bridge-site longitudinal splicing site position, arranging arch ribs on the temporary arch-splicing support, and adopting an arch springing restraint device to preload arch springings after finishing splicing the steel pipe arch, thus enabling the steel pipe arch to form a stressed entirety; and finally, dismantling the temporary arch-splicing support, and adopting a pushing power system to realize integrally sliding the whole steel pipe arch into a proper position. The construction method of the invention has the advantages of small site occupation, integral hoisting of large sections, less hoisting subsection and less arch-splicing support amount, thus the construction cost is economical, the high-altitude welding quantity is less, the welding quality is ensured, the arch axis linetype control is easy, the steel pipe arch splicing and a concrete beam can be simultaneously constructed, arch splicing is carried out on an ectopic bridge site, the underbridge navigation is not influenced, the construction is safe and the construction progress can be quickened.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a large-span steel pipe arch integral sliding construction method for a curved bridge, belonging to the field of bridge engineering construction. Background technique [0002] At present, with the substantial improvement of the level of bridge construction in our country, steel pipe arch bridges are popular with people for their beautiful appearance and low cost, and have been widely used. The installation technology of steel pipe arches varies according to the geological and environmental factors of the bridge. There are support construction methods, cable hoisting methods, horizontal rotation methods, vertical rotation methods, and construction methods of comprehensive application of several methods. [0003] Scaffold method: [0004] That is to say, the method of cast-in-place or assembled structure on the support, which is to add pre-camber according to the design line of the ...

AI Technical Summary

Problems solved by technology

This method adopts the construction technology of segmental assembly of steel pipe arches in different positions and overall sliding in place, which effectively solves the problems of long construction period and large site occupation of steel pipe arches and saves the amount of temporary construction materials

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