隧道软弱围岩中双层小导管超前支护的施工技术  

Construction Technology of Double-layer Small-duct Forepoling in Weak Surrounding Rock of Tunnel

作　　者：李琳琳 

机构地区：[1]中铁十六局集团第一工程有限公司,北京市101300

出　　处：《城市道桥与防洪》2017年第5期230-232,共3页Urban Roads Bridges & Flood Control

摘　　要：在隧道工程施工过程中,经常会遇到软弱围岩地层,为了避免出现开挖失稳的情况,一般会使用双层小导管超前支护技术进行注浆加固。以三阳隧道为例,从施工准备、小导管设计、注浆施工、注浆异常处理等几个方面对双层小导管超前支护施工技术进行了探讨。The weak surrounding rock stratum often appears in the tunnel engineering construction. In order to avoid the situation of excavation instability, the double-layer small-duct forepoling technology is generally used for the grouting reinforcement. Taking Sanyang Tunnel as an example, the article discusses the double-layer small-duct forepoling construction technology from the construction preparation, small-duct design, grouting construction and abnormal grouting treatment.

关 键 词：隧道软弱围岩 双层小导管 超前支护施工 

分 类 号：U455[建筑科学—桥梁与隧道工程]