Novel RC-masonry combined arch bridge structure and construction method

Abstract

A novel RC-masonry combined arch bridge structure is composed of a first-stage structure, a second-stage structure and a building on an arch, wherein a whole space structure composed of RC arch ribs,RC cross beams and pier abutments serves as the first-stage structure; the RC arch ribs and the cross beams of the first-stage structure are prefabricated section by section in the early stage of construction, hoisted section by section, combined and cast in place into a whole. When the whole first-stage structure reaches design strength, masonry arch plates are built on the first-stage structurestrip by strip and section by section to serve as the second-stage structure, wherein the middle arch rib masonry arch plate is built first, and then the edge arch rib masonry arch plates are built. According to the thickness of a main arch ring, a later-stage structure or the building on the arch built on the second-stage structure layer by layer is determined till the whole bridge is formed, andconstruction is finished. According to the construction method, the RC arch ribs play a role in bearing components, and an arch frame formed by the arch ribs is a formwork support for later-stage structure construction, so that the waste caused when the arch frame in a traditional masonry arch bridge support construction method only serves as a construction support and is detached after the archring is built is avoided.

Description

technical field [0001] The invention belongs to the technical field of arch bridge structure and construction, and in particular relates to the structure and construction method of a new type of upward-supporting composite arch bridge. The main arch ring of the novel composite arch bridge is composed of arch ribs and masonry arch plates. Background technique [0002] Arch bridges have a long history and are widely used in highways, municipal and other transportation fields as well as landscape bridges because of their beautiful shape, durability, convenient materials, and relatively low cost. However, during the development of arch bridges, structural materials and construction techniques have always restricted its development. [0003] In the context of my country's large-scale infrastructure construction in recent decades, a large number of roads and bridges have been built, but we found that in the construction of many bridges, mainly reinforced concrete-based girder brid...

AI Technical Summary

Problems solved by technology

In addition, with the characteristics of better corrosion resistance, decorative effect and durability of stone, its cost is getting higher and higher.

The second is that the construction of arch bridges is more complicated than other types of bridges. It is necessary to build arch frames in the early stage for the masonry of the main arch ring, which correspondingly increases its construction cost. In addition, the construction of arch bridges is also more dangerous. Therefore, the large number of bridges currently under construction rarely use

With the increase of bridge span and bridge height, the cost of brackets and other auxiliary equipment increases greatly, and in the construction of traditional masonry arch bridges with brackets, the arches are only used as construction brackets, and it will cost money and money after the construction of the arch bridge is completed. Labor dismantles the arch frame, resulting in harsh construction conditions, long construction period, labor-intensive, and high cost of masonry arch bridges, which limits the application of masonry arch bridges on high-grade highways

There are many construction procedures for arch bridges. At present, highly mechanized and industrialized methods have not been adopted in the construction of masonry arch bridges. In order to save labor and speed up the construction progress, composite masonry arch bridges are used to increase the proportion of prefabricated components in the masonry quantity. It is very necessary to increase the specific gravity in order to facilitate mechanized and industrialized construction

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