Prefabricated rail top air duct and construction method thereof

Abstract

The invention provides a prefabricated rail top air duct. The prefabricated rail top air duct comprises a top plate and a bottom plate. An inner fixing wall is arranged at the same ends of the top plate and the bottom plate, a side plate is arranged at the other ends of the top plate and the bottom plate, the outer surfaces of the top plate and the side plate are arranged into rough surfaces, andmultiple connecting rebars are further reserved in the top plate and the side plate. A construction method of the prefabricated rail top air duct is suitable for the prefabricated rail top air duct. The construction quality of the prefabricated rail top air duct can still be guaranteed under the condition of low precision of cast in place, the overall rigidity between a middle plate and the rail top air duct can be effectively improved, and the construction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of subway station ventilation systems, and in particular relates to a prefabricated rail top air duct and a construction method thereof. Background technique [0002] The rail top air duct, that is, the air duct on the top of the train, is an important internal structural component in the ventilation system of the subway station, which is suspended at the junction of the station middle plate and the structural side wall. The main functions of the rail top air duct are: 1) Ventilation and heat dissipation on the top of the train to meet the standard that the maximum temperature in the tunnel in summer does not exceed 40 degrees; 2) As a fixed base for the catenary; 3) As the upper part of the screen door or safety door. Sealing member. [0003] Due to the particularity of its location, the post-casting method is mainly adopted for construction at present, especially in the stations where the shield tunnel co...

AI Technical Summary

Problems solved by technology

[0005] 1) When the middle plate is cast in place, the accuracy of the reserved installation position is difficult to control, which often leads to the failure of normal installation of the rail top air duct in the later stage;

[0006] 2) The local corner points of the steel bar connection are used to excavate the steel bar, and the connection rigidity is insufficient;

[0007] 3) The method of post-pouring connection has the problem of secondary pouring, difficult construction, low efficiency and long construction period

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