地铁深基坑开挖对既有管线影响分析及保护措施

Impact Analysis of Deep Foundation Pit Excavation on Existing Pipelines and Corresponding Protective Measures

为研究基坑开挖对周边管线的影响,以福州地铁6号线潘墩站为工程背景,采用现场实测结合数值分析的方法对管线的变形和应力响应进行了研究,并提出了管线保护措施。研究结果表明,根据管线变形开展管线损伤评估并不合理,基于管线变形数据可推算管线的应力状态,判定管线安全程度。管线保护措施须根据施工工况和地质条件综合选择。研究结果可为类似工程设计和施工提供参考。

To investigate the impact of foundation pit excavation on the surrounding pipelines,this study uses the Pandun Station of Fuzhou Metro Line 6 as the engineering context,employing a combination of field measurements and numerical analysis to assess pipeline deformation and stress responses.Protective measures for the pipelines are also proposed.Results indicate that assessing pipeline damage solely based on deformation is insufficient,instead,pipeline deformation data should be utilized to estimate stress states and determine safety levels.Protective measures should be selected comprehensively based on the construction methods and geological conditions.These findings provide a valuable reference for the design and construction of similar engineering projects.