Short-line matching prefabricated formwork system for corrugated steel web composite structure girder bridge

Abstract

The invention discloses a short-line matching prefabricated formwork system for corrugated steel web composite structure girder bridges, which includes a fixed end form and a fixed end form support, an outer form and an outer form support, an inner form and an inner form support, and a bottom form And bottom mold support, bottom mold trolley, hydraulic system and other parts. The fixed end mold includes an upper part and a lower part. The upper part is provided with a push-pull movable block opposite to the corrugated steel web to facilitate the corrugated steel web to enter the mold; a three-way position adjustment device is arranged on the main beam of the outer mold to accurately position the corrugated steel. The space posture of the web; the sealing device of the steel-concrete joint is installed in the steel-concrete joint area, which also has the function of positioning the corrugated web; according to the structural size of the beam section, each part of the formwork is assembled by a hydraulic system and accurately positioned. The invention aims to solve the problems of high installation accuracy requirements of corrugated steel webs and great difficulty in molding the entire reinforcement cage, so as to ensure high-quality and high-efficiency prefabricated construction of composite beam segments.

Description

technical field [0001] The invention relates to the technical field of bridge construction. More specifically, the present invention relates to a stub matching prefabricated formwork system for corrugated steel web composite structural girder bridges. Background technique [0002] In recent years, bridges with corrugated steel web composite structures have been widely used in my country and even the world due to their light weight, high prestressing efficiency, good durability, and beautiful appearance. Pouring construction technology. With the development of bridge industrialization, the segmental precast assembly technology with the advantages of energy saving, environmental protection, high efficiency, and durability has been promoted in concrete bridges. In addition to improving the construction quality and accelerating the construction speed, it can also improve the mechanical performance and seismic performance of conventional segmental beam joints, and reduce constru...

AI Technical Summary

Problems solved by technology

Compared with ordinary concrete segmental girder bridges, corrugated steel web composite segmental girder bridges increase the installation process of corrugated steel webs. Butt or lap joints are used between adjacent segments. The distance between the two ends of the corrugated steel web segment is usually less than 1cm from the fixed end form or the matching beam, while the distance between the two ends of the steel cage of the ordinary concrete segment is 1 cm from the fixed end form or the matching beam. With a protective layer thickness of 4-6cm, it is very difficult to enter the overall reinforcement cage of the corrugated steel web composite box girder section into the mold when the fixed end forms or matching beams at both ends of the section to be poured are positioned; in addition, the combination of steel and concrete The area connection structure is complex, the quality of concrete pouring is difficult to guarantee, and higher requirements are placed on formwork sealing

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