以某项目某段盾构区间下穿既有地铁 U 形槽结构为例，采用有限元分析方法，通过模拟盾构区间下穿 U 形槽结构的施工过程，研究了盾构区间穿越过程中对地铁 U 形槽结构的影响，根据分析结果采取有效的防治措施，确保了既有线的正常运营和新建工程的施工安全。%Taking the U-shape groove structure of the shield interval under-crossing existing subway as an example,applying finite element analy-sis method,through simulating shield interval under-crossing U-shape structure construction process,the paper studies the impact of shield inter-val crossing process upon the subway U-shape groove,and adopts effective preventive measures according to analysis results. As a result,it guar-antees normal operation of existing subway line and new-built engineering construction safety.
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