摘要
双线铁路隧道超浅埋下穿山谷河道时施工安全风险极高,主要有大断面、富水、地质条件差、超浅埋的特点。采用三台阶七步开挖和拱部护拱备用方案相结合的施工方法,加强超前支护和初期支护,最大限度减少对围岩的扰动,安全顺利地通过超浅埋段。论文对格鲁吉亚现代化铁路项目新建T7隧道下穿超浅埋河道施工进行了介绍,为今后同类型隧道施工提供参考。
The construction safety risk of the double line railway tunnel is very high when it is buried under the valley and river channel, which mainly has the characteristics of large cross-section, rich water, poor geological conditions and super-shallow burial. The construction method of three-step and seven-step excavation combined with the spare plan of arch protection is adopted to strengthen the advanced support and the initial support, minimize the disturbance to the surrounding rock, and safely and smoothly pass through the ultra-shallow buried section. This paper introduces the construction of new T7 tunnel under the ultra-shallow buried channel in the modern railway project of Georgia, and provides reference for the same type of tunnel construction in the future.
作者
高伟强
GAO Wei-qiang(China Railway 23 Bureau Group No.3 Engineering Co. Ltd.,Chengdu 611130,China)
出处
《中小企业管理与科技》
2019年第12期150-151,共2页
Management & Technology of SME
关键词
超浅埋
大断面
富水
地质条件
super-shallow buried
large cross-section
rich water
geological conditions
