Subway station semi-precast steel fiber reinforced concrete track top air duct structure and construction method

Abstract

The application discloses a subway station semi-precast steel fiber reinforced concrete track top air duct structure and a construction method, which comprises a beam plate, wherein a notch is formed in the length direction of the beam plate; and an air duct assembly, wherein the air duct assembly comprises at least two semi-precast units formed by a steel fiber reinforced concrete structure, the at least two semi-precast units are arranged in the notch of the beam plate in an assembled manner, the at least two semi-precast units are mutually matched and spliced in an assembled manner to form a cavity of a rectangular air duct, pouring cavities are arranged between the at least two semi-precast units and at the splicing positions of the at least two semi-precast units and the notch, and the at least two semi-precast units and the beam plate are integrated by pouring steel fiber reinforced concrete to form the track top air duct. Compared with a conventional post-poured concrete track top air duct or an assembled track top air duct, the track top air duct can be constructed simultaneously with the station beam plate, the construction period is short, the complex connection steps of nodes in the installation process are avoided, and the post-maintenance is simple.

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