Segmental assembled steel-concrete composite continuous beam and construction method thereof

Abstract

The invention discloses a segmental assembled steel-concrete combined continuous beam and a construction method thereof. The segmental assembled steel-concrete combined continuous beam comprises a prefabricated No.0 segment, a prefabricated end segment and a prefabricated middle beam segment, the prefabricated No.0 segment and the prefabricated end segment each comprises a steel beam, a concrete slab and a shear connector, and each steel beam comprises a top plate, a bottom plate and a web plate. The top plates between the adjacent main beam sections are connected in a fastened mode through second splice plates and high-strength bolts, each second splice plate comprises a horizontal plate and a plurality of vertical plates, the horizontal plates are provided with open holes corresponding to the top plate holes, and the high-strength bolts connect the adjacent top plates into a whole through the open holes; and the vertical plates are also provided with holes, and transverse steel barsof the concrete slabs penetrate through the holes, so that the concrete slabs and the steel beams in the range of the longitudinal connecting sections are connected into a whole, the problem that large sections are difficult to transport and hoist is solved, the arrangement time of temporary piers is shortened, and the traffic interference time is shortened. Full-bolt connection among the sectionsis adopted, so that the welding quality problem possibly caused by on-site welding of a construction site is avoided.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a segmentally assembled steel-concrete composite continuous beam and a construction method thereof. Background technique [0002] With the acceleration of the urbanization process, the construction of municipal infrastructure has gradually entered a climax, while the traditional cast-in-place construction will easily lead to a sudden drop in the traffic capacity of the construction area, affecting the smooth flow and safety of the road, and even frequent traffic interruptions, which greatly affect the life of residents. work and life; in addition, the traditional cast-in-place site has a large amount of work, low construction efficiency, high overall energy consumption, and serious disturbance to the residents. The prefabricated bridge can significantly speed up the construction progress and reduce the impact on the existing Traffic interference, and is conducive to environmental...

AI Technical Summary

Problems solved by technology

The commonly used design method of prefabricated steel-concrete composite continuous beams at this stage is to set the main girder as a longitudinal segmental member, and to realize the splicing between segments through the support of temporary piers on site. The installation time of temporary piers usually runs through the bridge construction period. In the whole process, the construction interferes with the passage of the road below, and also increases the investment of the construction unit.

However, after the steel beams are constructed first, the concrete layer is poured on site. Although the temporary piers are removed after the steel beam splicing is completed, a large number of formworks need to be erected on site, which increases the workload on site. The characteristics of post-combination with concrete lead to an increase in the amount of steel used in the structure

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