Air pipe mounting structure in narrow vertical shaft and construction method of air pipe mounting structure

The invention discloses an air pipe installation structure in a narrow vertical shaft and a construction method thereof.The installation structure comprises four supporting vertical rails, the four supporting vertical rails are arranged in the vertical direction and fixedly installed on the portions, on the outer sides of the four corners of an air pipe, of the shaft wall of the vertical shaft correspondingly, and the plane projection points of the four supporting vertical rails are located on the four corner points of the same rectangle; the center axis of the rectangle coincides with the center axis of the air pipe, vertically-extending sliding grooves are correspondingly formed in the sides, close to each other, of the two supporting vertical rails oppositely arranged in the depth direction of the vertical shaft, transverse supporting screw rods are slidably installed in the sliding grooves, and the two ends of the transverse supporting screw rods are slidably embedded in the supporting vertical rails on t