城轨车站段开挖对邻近高铁站建筑物的安全影响研究

Research on the Safety Impact of Excavation of Urban Rail Station Sections on Adjacent High-Speed Railway Station Buildings

目前特大城市的城市轨道交通项目层出不穷,周边已有建筑物群的城轨车站段开挖施工安全隐患巨大。依托轨道交通资阳线工程的第七座车站资阳北站,提出了城轨车站段开挖(明挖与暗挖)对邻近高铁站建筑物控制技术,建立了城轨车站段近接既有建筑物三维模型,探明了既有建筑物群国铁站房和地下停车场变形强度安全性,揭示了既有建筑物位移及应力变化规律,探明了城轨车站段开挖对邻近高铁站建筑物安全控制技术有效性。研究成果可为城轨车站段开挖对邻近建筑物的影响提供技术参考,对未来基坑开挖具有实际指导作用。

At present,urban rail transit projects in megacities are emerging one after another,and the excavation construction of urban rail station sections with existing buildings around them has huge safety hazards.Based on the Ziyang North Station,the seventh station of the rail transit Ziyang Line Project,the control technology of the excavation of the urban rail station section(open excavation and subsurface excavation)to the adjacent high-speed railway station building is proposed.The threedimensional model of the urban rail station section adjacent to the existing building is established.The safety of the deformation strength of the existing national railway station buildings and the underground parking lot is proved.The displacement and stress variation law of the existing building is revealed,and the effectiveness of the excavation of the urban rail station section to the safety control technology of the adjacent high-speed railway station building is proved.The research results can provide technical reference for the influence of urban rail station section excavation on adjacent buildings,and have practical guidance for future foundation pit excavation.