市政管线是城市生命线的重要组成部分，其安全性至关重要，外部施工是诱发管线破坏的重要因素之一。在工程实践中，建模分析、安全评估的对象主要是基坑，而忽视了管道自身的安全状况。通过预先对排水管道进行安全评估，不仅能为后续施工和监护提供合理的建议，还能通过加强监测措施最大限度地降低管道被损风险，保障其运维安全。该文针对某地铁联络通道深基坑施工工程，采用有限元数值模拟分析法，对现状排水管道的安全性影响进行了研究，并提出相应的对策建议，通过实施有效的监测措施，成功保障了管线的正常运行，取得了良好的效果，可为类似的排水管道监护工程提供参考。

Urban underground pipelines are an important component of urban lifeline and their safety is one of crucial importance. External construction is one of the key factors contributing to pipeline damage.In engineering practice,modeling analysis and safety assessment mainly focus on foundation pits,while the safety of pipelines themselves is often neglected. By conducting a safety assessment of the drainage pipes in advance,it can not only provide reasonable suggestions for subsequent construction and monitoring but also minimize the risk of pipeline damage and ensure its operation and maintenance safety through strengthening monitoring measures. This paper uses the finite element numerical simulation analysis method and adresses on a deep foundation pit construction case for a metro connection passage to study the safety of existing drainage pipelines and puts forward corresponding countermeasures. Through the implementation of effective monitoring measures,the normal operation of the pipelines has been successfully guaranteed,achieving satisfactory results,which can provide valuable reference for similar drainage pipeline monitoring projects.