Construction method of curved fish-bellied cast-in-place reinforced concrete box girder above water

Abstract

A construction method of an overwater curved fish-bellied cast-in-place reinforced concrete box girder comprises steps as follows: a piling platform for a cast-in-place bored pile is modified and taken as a bearing foundation for full-hall steel tube supports; arc-shaped steel formworks of the box girder are manufactured; the bracing form of the arc-shaped steel formworks is changed into vertical bracing from diagonal bracing; the full-hall steel tube supports are mounted between the piling platform and the arc-shaped steel formworks; a mounted box girder formwork is subjected to concrete casting. According to the construction method of the overwater curved fish-bellied cast-in-place reinforced concrete box girder, the piling platform is used as the bearing foundation, the full-hall steel tube supports are erected on the foundation, the structure of the formwork support is optimized by improving the girder formwork, the safety, economy and adaptability of the formwork support are remarkably improved, the construction difficulty is substantially reduced, the construction period is greatly shortened, construction of a fish-bellied special-shaped bridge with a unique model is successfully completed, and a safe, convenient and economical construction technology is provided for construction of similar bridges.

Description

Technical field [0001] The invention relates to a construction method of a box girder of a bridge, in particular to a construction method of a curved fish belly type cast-in-situ reinforced concrete box girder on the water. Background technique [0002] At present, all parts of the country are vigorously constructing infrastructure facilities. Bridge engineering belongs to the national infrastructure construction content. It is often a key control node in a project. Its construction speed directly restricts the smooth operation of the entire project. Economic development injected vitality. As modern urban architecture pays attention to the combination of applicability and beauty, as a part of the urban landscape, landscape bridges not only need to bridge obstacles and connect traffic, but also have a certain degree of artistry and beauty, and can be well integrated with the landscape on both sides of the strait. As one. As an architectural work of art, landscape bridges are dif...

AI Technical Summary

Problems solved by technology

The formwork construction of this type of bridge is the key to the success of the bridge construction. Factors such as its artistic plane curve, unique beam body shape, and the short construction period formed by the accelerated pace of urban construction have greatly affected the formwork construction of the bridge superstructure. bring a lot of inconvenience

For example: the working surface of the formwork on the water is narrow; the size of the formwork varies with the irregularity of the beam body, making it difficult to make and assemble; it is difficult to drop the formwork, so it is necessary to study a corresponding formwork construction technology

[0003] Curved bridge is an important bridge type in modern transportation. This bridge type has beautiful lines and light shape, and is suitable for complex terrain. It is often used on land, such as ramps of urban overpasses and bridges passing through complex mountainous areas. The curved bridge body is usually prefabricated. Hoisting or cast-in-place construction with full-frame brackets and formwork, and cast-in-situ construction with curved full-wall brackets and formwork is rare in the construction of bridges over water. At present, there are few construction summaries and no relevant literature has been found

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