Prefabricated assembly combined type portal pier

The utility model relates to a prefabricated assembly combined type portal pier. Most traditional portal piers are of a rectangular solid concrete structure or a box type steel bent cap structure, the rectangular solid concrete structure is large in masonry volume and dead weight so that only an in-site support cast-in-place scheme can be adopted, the box type steel bent cap structure is high in engineering construction cost, large in later period maintenance workloads and difficult to check and repair. The prefabricated assembly combined type portal pier comprises pile caps and pier columns on the two sides. Anchoring cast-in-place solid sections are arranged on the upper sides of the pier columns. A bent cap assembled in a side-by-side mode is connected between the two anchoring cast-in-place solid sections and is composed of general box girder sections and transitional box girder sections. The general box girder sections and the transitional box girder sections are respectively of a hollow structure and respectively composed of a top board, webs on the two sides and a bottom board. Chamfers are arranged between each top board and the corresponding webs and between each bottom board and the corresponding webs. A temporary support is arranged between each transitional box girder section and the corresponding pile cap and is a grate-shaped steel support. Due to the adoption of a concrete structure, design and construction are simple and convenient, a construction period can be shortened, engineering investment can be greatly saved obviously, meanwhile, maintenance and repair work and difficulty in the later period can be greatly reduced, and the portal pier is more economical and reasonable.