Bolting-welding mixed-connection segmented prefabricated assembly type composite beam and construction method thereof

Abstract

The invention discloses a bolting-welding mixed-connection segmented prefabricated assembly type composite beam and a construction method thereof. The composite beam comprises prefabricated main beamsegments, the adjacent prefabricated main beam segments are connected through longitudinal connecting segments to form main beam structures, and the adjacent main beam structures are connected throughtransverse connecting segments to form a bridge span structure; each prefabricated main beam segment comprises a steel beam, a concrete slab and a shear connector, and each steel beam comprises a topplate, a bottom plate and a web; and adjacent top plates are welded in a butt joint mode, adjacent bottom plates and webs are connected in a fastened mode through bolts after being welded in a butt joint mode, longitudinal connecting steel components are arranged on the top plates, and adjacent longitudinal connecting steel components are welded in a butt joint mode. The longitudinal connecting steel components are provided with round holes, first reinforcing steel bars penetrate into the round holes, second reinforcing steel bars extend out of the periphery of the concrete slabs, and longitudinal connecting segment wet joints are cast in situ between the first reinforcing steel bars and the second reinforcing steel bars; and transverse connecting segment wet joints are cast in place between the adjacent concrete slabs; the segmental prefabricated reinforced concrete composite beam is convenient to transport and hoist; and bolt welding mixed connection is adopted, overhead welding ofthe bottom plate is avoided, and construction is convenient.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a segmented prefabricated composite beam connected by bolting and welding and a construction method thereof. Background technique [0002] With the acceleration of urbanization, the construction of transportation and municipal infrastructure in various provinces and cities in my country has gradually reached a climax, and a large number of projects with large quantities and long construction periods have emerged. [0003] For municipal bridge projects, because most of them cross urban areas, traditional cast-in-place construction can easily lead to a sudden drop in traffic capacity in the construction area, affecting the smooth flow and safety of road traffic, and even frequent traffic interruptions, which greatly affect the work and life of residents. In addition, the traditional cast-in-place site has a large workload, low construction efficiency, high overall energy consumptio...

AI Technical Summary

Problems solved by technology

Although the construction speed of this method is fast, due to the limited transportation and hoisting in the city, the bridge span length is relatively small

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