Novel replacement structure for reinforced concrete through arch bridge suspender and replacement method thereof

Abstract

The invention discloses a novel replacement structure for a reinforced concrete through arch bridge suspender and a replacement method thereof, belongs to the technical field of bridge engineering, and aims to solve the problems that a single suspender of a reinforced concrete through arch bridge needs to be replaced by means of a temporary tensioning and dragging device, the bridge traffic needsto be interrupted, and time and labor are wasted. The structure comprises a suspender, an arch rib and a cross beam, the suspender is arranged between the arch rib and the cross beam, the suspender isa double-suspender component, the double-suspender component comprises a first anchor rod, a first cable distributing plate, a suspender unit, a second cable distributing plate and a second anchor rod which are sequentially arranged from top to bottom, a suspender anchor head is arranged between the suspender unit and the first cable distributing plate, and a screw sleeve is arranged between thesuspender unit and the second cable distributing plate. The method comprises primary replacement and secondary replacement. The suspenders can be replaced one by one through portable equipment, the stress reasonability of a bridge structure can be guaranteed, and great convenience is brought to cable replacement construction.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a novel replacement structure and a replacement method for a suspended rod of a reinforced concrete under-supported arch bridge. Background technique [0002] Among the concrete-filled steel tube arch bridges, under-supported arch bridges are commonly used in bridge structures, and more than 400 have been completed and put into operation. A large number of single suspender structures are designed for this structure. Suspenders, as one of the most important force-transmitting components of mid- and under-through arch bridges, have an important impact on the operational safety of the bridge. Generally, the design reference period of large-span concrete-filled steel tube under-supported arch bridges is 100 years, and the design service life of suspenders is 20 to 25 years. Therefore, there will be replacement of suspenders during the operation of arch bridges,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new replacement structure and replacement method for the suspended rod of a reinforced concrete under-supported arch bridge, so as to solve the problem that the single suspender of a reinforced concrete under-supported arch bridge needs to be replaced by temporary tensioning and dragging devices, bridge traffic, etc. Disruptive, time-consuming and labor-intensive problems

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