The 14m-class super-large diameter mud-water balanced shield, independently developed by Shanghai Tunnel Engineering Co., LTD, is used for the construction of Shanghai Municipal Airport's liaison line. With a total length of about 92m, the shield can meet the tunneling requirements of the minimum horizontal curve radius of 450m. The rear part is equipped with a 3-section integrated frame, which adopts the design of landing wheel, which can deal with many complicated working conditions such as deep burial depth and small turning radius.

The Shanghai Airport Link line has 9 stations, which adopt the national railway standard, with the design speed target of 160km/h, and adopts the laying method of viaduct, ground and underground, mainly underground. The project is scheduled to be completed and put into operation in 2024, when the transit time between hongqiao and Pudong is expected to be less than 40 minutes.

Following the successful exit of the "tiebing no. 1" shield tunneling machine, "tiebing no. 2", the last shield tunneling machine in charge of the construction of metro line 22 from qi-fu to guangzhou south railway station (hereinafter referred to as "qi-guang section"), also completed the construction task successfully on May 18, marking the completion of the double-line tunnel in this area. This is the longest shield range on the whole line and the first to realize the connection between the two tunnels.

At 9:30am on May 13th, xiamen rail transit line 6 (maluan bay section) jimei island station to xibin intersection station, the two lines of cross-sea shield tunnel interval through! The length of this section is about 7600 meters. The tunneling task of the cross-sea tunnel has been completed successfully. Another difficult and high-risk project of xiamen metro has been overcome!

Recently, the ningju intercity rail transit project ushered in the first major construction node after the resumption of work, east street station ~ jurong station interval left line "eight bureau 40" shield machine smoothly started.