地铁隧洞带水作业施工技术

Construction Technique of Working with Water in Subway Tunnel

摘要:

以在建的北京地铁十号线双井一劲松区间暗挖隧道为例，通过分析北京特殊地层在带水条件下单洞结构单线隧道台阶法的施工工艺，洞悉浅埋暗挖正台阶法施工中超前预加固、开挖时空顺序、台阶长度等工艺对围岩稳定性的影响程度。

Abstract:

With the under-construction case of the section between Shuangjing and Jingsong of No. 10 Line of Beijing Metro, analysis was made on the construction technology for single tunnel-single line-step excavation method. According to the analysis, the degree of influence to surrounding rock stability by technology of undercutting with shallow overburden, inclucling pre-strengthening, excavation sequence and step length, can be very clear.