Abstract: Objective Shanghai Suburban Railway Airport Link Line passes beneath 10 taxiways, the Airport Satellite Hall and other airport facilities within the Pudong International Airport area. The outer diameter of the shield tunnel segment is 9 m, with a maximum tunnel arch vault burial depth of 52 m, and a total tunnel sectional length of approximately 1.9 km entirely situated within the ⑦₂ silty sand stratum. Due to the high design difficulties, high construction risks, and very limited reference projects or construction experiences, it is necessary to conduct an in-depth study on key design and construction technologies of shield segments in ultra-deep burial, high water-pressure, long-distance sandy strata. Method Water pressure resistance tests are conducted on elastic sealing gaskets of different shapes used in segment joints to determine appropriate cross-sectional parameters. In response to the construction risks posed by ultra-deep burial, high water-pressure, and long-distance sandy strata, the aircushion slurry balance shield machines are adopted, with enhanced main drive and shield tail seal designs to ensure that the pressure-bearing capacity of main drive exceeds 1.0 MPa, and the segment tail seal pressure-bearing capacity exceeds 0.8 MPa. During shield advancement, the shield tail sealing performance is ensured by controlling the synchronous grouting amount and shield tail grease injection volume. According to the differences in shield tunneling strata, variations in shield thrust and cutterhead torque are analyzed, and the thixotropic slurry is injected radially utilizing shield machine to optimize excavation parameters and reduce cutter wear. Result ＆ Conclusion During shield tunneling, no leakage occurred at both shield tail and segment joints. The maximum settlement values of the taxiways caused by engineering are all less than 7 mm, meeting the settlement control requirements, thereby verifying the effectiveness of the above technical measures.