介绍成都地铁1号线某盾构隧道穿越正在运营的火车南站铁路股道，采用有限元理论分析了盾构穿越铁路股道的风险因素，提出控制沉降的技术措施：采用扣轨加固为主，严格控制盾构机掘进参数、加强监测和信息化管理。严格按方案实施，确保盾构安全顺利通过。

As for a shield tunnel crossing beneath the railway tracks at Chengdu South Railway Station on Chengdu Metro Line 1, the finite elements theory is adopted. This thesis analyzes the risk factors of shield machine crossing beneath the railway tracks and puts forward technology to control settlement: with the predominance of track reinforcement, the boring parameters of the shield machine should be strictly controlled and monitoring management and information management should be strengthened. The tunneling should be carried out in strict conformity with the plan to ensure the safe and successful boring of the shield machine.