盾构区间下穿既有线的影响分析

Analysis on the impact of shield interval under-crossing existing railway line

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 analysis method,through simulating shield interval under-crossing U-shape structure construction process,the paper studies the impact of shield interval crossing process upon the subway U-shape groove,and adopts effective preventive measures according to analysis results. As a result,it guarantees normal operation of existing subway line and new-built engineering construction safety.