Solid-web arch bridge system spliced by UHPC prefabricated corrugated plate sections and construction method

Abstract

The invention discloses a solid-web arch bridge system spliced by UHPC prefabricated corrugated plate sections and a construction method. The arch bridge system comprises a strip-shaped concrete foundation arranged on foundation soil, two arch seats provided with reinforced ultra-high performance concrete (RUHPC) tie bars, segment assembled UHPC corrugated plate arch rings arranged on the arch seats, side wall foundations, side walls built by concrete precast blocks, arch filler and concrete side wall coping. The UHPC corrugated plate arch ring is prefabricated in a segmented mode through UHPC, and all the prefabricated segments are spliced into a whole through finish rolling twisted steel and epoxy resin mortar. The UHPC corrugated plate main arch ring is firstly pre-assembled, hoisting construction is adopted after pre-assembly is qualified, and after the main arch ring is hoisted in place, main arch ring folding and on-arch building construction are conducted on the full framing. The prefabricated RUHPC tie bars and the strip-shaped concrete foundation are adopted, the arch foot thrust can be balanced, the work amount of the lower structure can be remarkably reduced, the damage of excavation to the environment is reduced, and the adaptability to the fragile ecological environment area is enhanced.

Description

technical field [0001] The invention relates to the technical field of arch bridges, in particular to a solid-belly arch bridge system assembled by UHPC prefabricated corrugated plate segments and a construction method. Background technique [0002] The current small and medium-span arch bridges are mainly reinforced concrete arch bridges or masonry arch bridges, which are widely used in road transportation networks. However, with the passage of time and the development of technology, these structures have also suffered from various degrees of disease. The deficiencies of the arch bridge are also gradually emerging: the main arch ring adopts the integral cast-in-place process for a long construction period, the construction process is relatively cumbersome and is greatly affected by geological conditions, especially in my country's Qinghai, Tibet and other high-altitude, high-cold regions. Due to complex geological conditions and fragile ecological environment, engineering con...

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Problems solved by technology

[0004] In order to solve the problems of long construction period, complex process, low structural durability and high requirements for the foundation, the present invention provides a solid-web arch bridge system and construction method using UHPC prefabricated corrugated plate segments assembled, and the UHPC corrugated plate arch ring And RUHPC tie rods are applied to the arch bridge structure, considering the strength and stiffness factors comprehensively, it has the advantages of high compressive strength, high rigidity, small dead weight, and convenient construction. Structural stability and adaptability to fragile ecological environment areas, used to replace traditional solid-web arch bridges in small and medium-span bridges

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