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分析探讨了大断面隧道施工中的几种方法,并以金寨隧道为工程背景,详细介绍了三台阶七步开挖法在大断面隧道施工中的成功应用,总结出了一些双线铁路大断面隧道软弱围岩的施工技术。
This paper analyzes and discusses several methods in the construction of large cross-section tunnels. Taking Jinzhai Tunnel as an example, this paper introduces the successful application of three-step seven-step excavation method in large-section tunnel construction and concludes some double- Construction Technology of Soft Surrounding Rock in Cross Section Tunnel.