Discussion on Construction Method of Assembled Track Top Air Duct in a Station

In order to solve the problems of long construction period, complex construction technology, high construction risk and difficult construction quality control in the air duct of cast-in-place rail top in subway station, It is necessary to explore the new construction technology of precast track top air duct.Combined with the actual situation of a station, a set of construction method of precast track top air duct is explored by using self-designed assembling platform, hoisting equipment, track pulley moving platform and transshipment steel pole.This set of construction plan makes full use of the advantages of off-site prefabrication and easy installation of the prefabricated building, reducing the secondary entry of the construction team, shortening the construction period and construction measures costs by more than 50%.The application of Ultra High Performance Concrete(UHPC) provides a reliable guarantee for the connection of precast members and reduces the weight of precast units.This construction plan can not only provide experience examples for similar projects, but also open up new ideas for the construction of precast track top air duct.