铁路枢纽地区复杂环境下隧道修建技术探讨  

Discussion on Tunnel Construction Technology of Railway Terminal in Complex Environment

作　　者：赵全超[1] ZHAO Quan-chao(China Railway Er yuan Engineering Group Co.Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《工程建设与设计》2023年第5期80-84,共5页Construction & Design for Engineering

摘　　要：云桂铁路百色站疏解工程拟建南角亭二号、三号隧道紧邻正线既有的南角亭一号隧道并下穿百色起义纪念公园,工况极其复杂。依托该枢纽地区南角亭二号、三号隧道修建为工程实例,通过数值模拟分析洞周岩体的位移变化情况,探讨了对拟建隧道周边既有工程及敏感构筑物预加固措施的必要性,并提出了采用钻孔灌注桩隔离防护效果显著;进一步阐述了施工监测、施工工序的特殊要求,并达到了隧道施工及运营安全的目的。The Nanjiaoting-2 Tunnel and Nanjiaoting-3 Tunnel will be built in Baise Station Evacuation Engineering of Yungui Railway.Especially challenging is that the Nanjiaoting-2 Tunnel and Nanjiaoting-3 Tunnel are situated closely to the existing Nanjiaoting-1 Tunnel and will pass through the excitingBaiseUprisingMemorial Park from below.Relying on theNanjiaoting-2 Tunnel and Nanjiaoting-3 Tunnel in the hub area as the project example,the displacement change of the rock mass inner tunnel is analyzed by numerical simulation.Then the necessity of pre-reinforcement measures for two existing structures is proposed.And drilled piles is extremely useful for project’s isolation and protection.Furthermore,corresponding special requirements of construction monitoring and construction process are expounded.At last,the aimof construction and transportation safety is achieved.

关 键 词：铁路枢纽 复杂环境条件 隧道 数值模拟 隔离防护 

分 类 号：U455[建筑科学—桥梁与隧道工程]