浅埋、富水、软弱黄土地段隧道施工技术

Construction Technology of Shallow Buried Tunnel in Saturated Soft Loess

黄土是特殊地层 ,大规模修建黄土隧道是最近几年才开始的 ,故黄土隧道的施工方法还不够成熟 ,特别是浅埋、富水、软弱地段黄土隧道施工更是隧道施工中的一大技术难题。本文介绍了通过采用超短台阶上弧导坑开挖 ,多层小导管——钢拱超前支护和加强监控量测等综合措施成功通过了浅埋、富水、软弱地段 ,达到了国内黄土隧道施工的先进水平 。

Loess is a specific stratum in China, only in recent years, there was a large scale of tunnel construction in loess, and its construction technology is not well developed. In particular, there is a technical problem for the shallow buried tunnel construction in saturated soft loess. This paper introduces a successful construction technology for the shallow buried tunnel construction in saturated soft loess. It consists of excavation of top arc heading on short flight steps and ahead supporting by multi layer conducting tube and steel arch with reinforced suervision and survey.