A prefabricated assembled bridge pier made of U-shaped steel bars and its connection technology

Abstract

The invention discloses a precast assembled bridge pier manufactured from U-shaped reinforcing steel bars. The precast assembled bridge pier comprises a pier body and a bearing platform, wherein the pier body comprises a U-shaped reinforcing steel bar cage and a pier stud, a plurality of U-shaped reinforcing steel bars are mutually spaced by a certain distance and are crisscrossed to form the U-shaped reinforcing steel bar cage, and the pier stud is cast at one end of the U-shaped reinforcing steel bar cage; a groove is formed in the bearing platform, and the other end of the U-shaped reinforcing steel bar cage is arranged in the groove; a plurality of holes are formed in each of the four side surfaces of the bearing platform, and reinforcing steel bars penetrate through the holes; a reinforcing steel bar mesh is formed by the reinforcing steel bars and the U-shaped reinforcing steel bar cage, and finally concrete is cast. The invention further discloses a connection process of the precast assembled bridge pier. According to the precast assembled bridge pier and the connection process thereof disclosed by the invention, a mutual crossed and meshed manner of the U-shaped reinforcing steel bars and the reinforcing steel bars (the reinforcing steel bars penetrated subsequently) is adopted between the bearing platform and the pier body, so that the integrity between the bridge pier and the concrete, and the seismic performance of the bridge pier are greatly enhanced, and the construction speed of the bridge pier is accelerated; and the precast assembled bridge pier and the connection process thereof are suitable for the rapid construction of an urban rail transit bridge or the connection of relevant parts, and also have a certain significance on the reconstruction after disasters.

Description

technical field [0001] The invention relates to the technical field of road and bridge construction, in particular to a prefabricated assembled bridge pier made of U-shaped steel bars and a connection process thereof. Background technique [0002] Compared with the traditional cast-in-place construction, the prefabricated assembly technology of "industrialized production and prefabricated construction" has many advantages: reducing the interference of on-site traffic environment, improving the construction environment of workers, improving the work efficiency of workers, ensuring construction quality, shortening the construction period, Reduce project cost, etc. Prefabricated assembly technology is the inevitable development direction of urban rail transit and elevated structures, and even the entire construction industry. [0003] The traditional cup-and-socket structure relies on the insertion of the pier column into the cap to a sufficient depth to ensure the failure mod...

AI Technical Summary

Problems solved by technology

But there are also some disadvantages: (1). The material cost of these two methods has increased; (2). The grouting sleeve needs a grouting machine, and the mechanical sleeve needs a thickening machine and a twisting machine to process threads; (3) .In terms of failure forms, the failure forms of the structure of the grouting sleeve include the breaking of the base metal of the steel bar, and the failure of the steel bar to be pulled out of the sleeve.

Under ideal circumstances, both methods can guarantee the base metal necking failure of the steel bar under ultimate tension, but due to construction quality problems, in some uncertain situations, the grouting sleeve will be pulled out and damaged, and the mechanical sleeve Brittle fracture of the steel bar will occur

[0005] On the one hand, due to the frequent occurrence of earthquakes in recent years, it has caused huge disasters and economic losses to the people.

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