基于智能化监测的西渝高铁青峰隧道下穿既有隧道研究  

Research on Qingfeng Tunnel of Xi'an-Chongqing High-speed Railway Underpassing Existing Tunnel Based on Intelligent Monitoring

作　　者：刘黎[1] 宋智来 王唤龙[1] LIU Li;SONG Zhilai;WANG Huanlong(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,Sichuan,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《工程技术研究》2024年第7期62-64,共3页Engineering and Technological Research

摘　　要：为研究新建隧道下穿开挖对既有线隧道的影响,文章通过现场调研、智能监测和数值模拟等手段,获取了既有隧道衬砌裂缝扩展、底部竖直沉降、边墙水平位移等结构稳定性指标,得出如下结论:新建隧道开挖时,上覆岩层发生倾向新隧道空间的变形甚至位移,影响了既有隧道的结构稳定性;既有隧道结构的稳定性受近接距离、埋深及断面等因素影响;既有隧道结构稳定性的智能化监测结果可以为新建隧道施工提供反馈。In order to study the influence of new tunnel undercrossing excavation on the existing tunnel,through field investigation,intelligent monitoring and numerical simulation,the structural stability indexes such as crack propagation,vertical settlement at the bottom and horizontal displacement of side wall of existing tunnel lining are obtained.The results show that when the new tunnel is excavated,the deformation or even displacement of the overlying strata tends to the new tunnel space,which affects the structural stability of the existing tunnel.The stability of the existing tunnel structure is affected by factors such as proximity distance,buried depth and section.The intelligent monitoring results of the stability of existing tunnel structures can provide feedback for the construction of new tunnels.

关 键 词：隧道下穿 智能化监测 结构稳定性 施工反馈 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]