福州地铁5号线临近营业线明挖基坑施工技术

Construction technology of open excavation foundation pit near business line of Fuzhou Metro Line 5

随着城市地铁建设的不断发展,临近运营地铁工程的基坑施工已不可避免。施工时如何控制既有地铁结构的变形,并将变形限制在安全运营许可的范围内成为当今重要的研究方向之一。文中结合福州地铁2、5号线金山站工程施工,通过临近营业线车站风险分析,制定合理的施工技术方案,实行科学有效的施工现场管控、现场实时监测及信息反馈等措施,保障基坑施工安全和已开通运营的2号线金山站的车站安全,为今后类似工程施工积累经验。

With the continuous development of urban subway construction,it is inevitable to construct the foundation pit near the metro project.How shall we control the deformation of existing metro structure and limit the deformation to the scope of safe operation permit during construction?Combining with the construction of Jinshan Station of Fuzhou Metro Line 2 and Line 5,through the risk analysis of the station near the business line,this paper formulates reasonable construction technology scheme,and carries out scientific and effective construction site management and real-time site construction.Monitoring and information feedback measures have realized the safety of foundation pit construction and the station safety of Jinshan Station on Line 2,which can accumulate experience for similar projects in the future.