暗挖轨道交通隧道下穿既有轨交线保护施工技术研究

Research on Construction Technology of Undercutting Existing Railway Crossing Line in Underground Excavation

以成都轨道交通L5省骨科医院站—高升桥站区间暗挖隧道工程为例,研究对既有成都轨道交通L3施工控制中的保护技术。介绍深孔注浆加固施工补救措施和既有轨道交通线路应急事故处理方案,降低新建暗挖隧道工程对既有路线的影响,为后续隧道下穿工程中对既有线路的施工保护技术提供一些借鉴经验。

Taking Provincial Orthopedic Hospital Station-Gaoshengqiao Station section undercutting tunnel project of Chengdu rail transit L5 as an example,the protection technology in construction control of existing urban rail transit L3 is studied.This paper introduces the remedial measures of deep hole grouting reinforcement and the emergency treatment plan of the existing rail transit lines,reduces the influence of the new tunnel construction on the existing routes,and provides some technical support and experience for the construction protection of the existing lines in the follow-up projects.