On the morning of Oct. 17th, the CRCC "Beijing Airlines No. 1" shield machine using in the new airport line project of Beijing rail transit originated from the construction site of the China Railway Shisiju Group Corporation. It is the shield subway construction project with the largest single line diameter in China.
The excavation diameter of the shield pipe of the new airport track is 9.13 meters and the designed speed is 160 kilometers per hour. It is the largest single track with the largest single line diameter and the fastest speed of design and operation in the subway construction in china. The 3847-meter-long section constructed by the China Railway Shisiju Group Corporation is the longest shield section in the whole line. It is a control project of track connection of the new airport. After originating this shield machine achieved the single head driving distance of 3847.4 meters. It is the longest once-driving distance in the existing metro tunnel constructions in China.