Open-spandrel arch bridge system adopting UHPC wet joint connection and construction method

Abstract

The invention discloses an open-spandrel arch bridge system adopting UHPC wet joint connection and construction method. The system comprises a concrete foundation arranged on foundation soil, a bridge abutment, an arch support, a prefabricated assembled rib arch arranged on the arch support, a web hole pier composed of a cover beam, a prefabricated stand column and a bottom beam, and a bridge deck. The prefabricated assembled rib arch is prefabricated in three sections, and all the prefabricated sections are connected through UHPC wet joints. A main arch ring is constructed in a cable hoisting mode, and then a building on the arch is constructed on the main arch ring; UHPC wet joints are applied to connection between the prefabricated arch ring sections, the excellent performance of UHPC is fully played, the lap joint length of reserved steel bars at the joints can be effectively reduced, the bonding strength of all the arch ring sections and the wet joint sections is enhanced, and all the performance of components under the normal working state and the extreme load effect is guaranteed; and prefabricated assembly type construction is adopted, the construction efficiency can be greatly improved, and the construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of arch bridges, in particular to a hollow arch bridge system and a construction method connected by UHPC wet joints. Background technique [0002] Arch bridges are one of the main structural forms of highway bridges in my country. Among them, reinforced concrete arch bridges make full use of the strength advantages of concrete and steel, which effectively improves the economic performance of arch bridges and expands the scope of use of arch bridges. Among the bridges across valleys in mountainous areas in China It is widely used. However, since the main arch ring cannot bear the force before closing, most of the main arch ring construction is carried out by erecting brackets on-site pouring or masonry. The construction process is cumbersome and often requires foundation treatment, bracket erection and bracket preloading. and other processes, in areas with poor geological conditions, it is more troublesome to ...

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Problems solved by technology

[0004] In order to respond to the transformation and upgrading of the bridge engineering construction industry from traditional industries to factory production, assembly construction, and green construction, and to solve the problems of complex construction technology and long construction period of arch bridges, the purpose of the present invention is to provide a UHPC wet joint connection UHPC is applied to the arch bridge system, which can reduce the length of wet joints and the anchorage length of steel bars at joints, enhance the bending resistance of joints, reduce on-site construction time, and optimize The structure and construction method of traditional hollow arch bridge with small and medium span

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