巨型溶洞松散回填体内超大断面隧道修建技术  

Construction Technology of Super-large Section Tunnel in Loose Backfill of Giant Karst Cave

作　　者：汪勇[1] WANG Yong(China Railway Eryuan 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：《高速铁路技术》2023年第2期43-47,共5页High Speed Railway Technology

摘　　要：本文介绍了玉京山隧道巨型溶洞、暗河工程难点及其处理方案,针对溶洞回填体内修建隧道这一难题,从结构型式、注浆加固、开挖支护及控制隧道沉降变形等方面进行了深入研究,提出了整体沉降和差异沉降双标准隧道沉降控制技术,保证了超大断面隧道结构安全。本工程施工经验可为同类工程提供借鉴。This paper introduced the difficulties of construction of the Yujingshan Tunnel in case of giant karst cave and underground river,as well as the treatment schemes.In view of the difficulty of tunneling in the backfill of the karst cave,this paper conducted in-depth study from the aspects of structural type,grouting reinforcement,excavation support,and controlling tunnel settlement deformation,and put forward the double-criteria tunnel settlement control technology of overall settlement and differential settlement to ensure the safety of the super-large section tunnel structure.The practice can provide a reference for similar projects.

关 键 词：隧道 巨型溶洞 回填体 超大断面 沉降控制 

分 类 号：U452.27[建筑科学—桥梁与隧道工程]