【摘要】 随着城市轨道交通的发展和网络的逐渐完善,在轨道交通线路周围进行工程活动不可避免。为确保已有轨道交通线路的正常运营,必须严格控制施工对运营线路的影响。作者所引基坑工程下方有3条地铁线路通过,坑底离运营线路最近处仅3 m。施工要求高、难度大。设计中对运营线路保护提出了针对性的地基加固、分块开挖等方案和施工措施。文中对施工阶段运营线路隧道总变形规律和施工各阶段变形规律进行了详细分析。更多还原

【Abstract】 With the development of city rail transit,it is inevitable to have engineering activities near metro line.In order to ensure the safety of the rail transit,the construction must be controlled strictly.There are three metro lines under a dip excavation engineering,and the nearest line is only three meters away from the dip excavation.The construction is confronted with great challenge.The design brings forward lots of construction measures in order to protect the operating metro line.This paper analyizes the deformation law of metro lines in detail during the excavation.更多还原