长育村隧洞进口凝灰岩富水带施工技术总结

Summary of Construction Technology of Tuff Water Rich Zone at the Entrance of Changyucun Tunnel

在隧洞的施工中,由于地质条件多变性、复杂性,在工程前期的地质勘探中,难以摸清具体的岩层情况,所以常常会遇到由于地质问题造成的突泥及涌水等灾害,其中以凝灰岩富水破碎带作为代表。隧洞在凝灰岩富水段施工时,如果不采取正确的处理措施,发生突泥溜塌的风险极大。介绍了云南省滇中引水工程大理Ⅰ段施工6标长育村隧洞进口在施工中遇到的凝灰岩富水破碎带时的处理措施,总结出一套实用、有效的施工经验,对后续同类工程施工具有很大的指导意义。

In the construction of tunnel, due to the variability and complexity of geological conditions, it is difficult to find out the specific rock stratum in the geological exploration in the early stage of the project. Therefore, mud inrush and water inrush and other disasters caused by geological problems are often encountered, especially the tuff water rich fracture zone. When the tunnel is constructed in tuff rich water section, if correct treatment measures are not taken, the risk of mud outburst and collapse is great.This paper introduces the treatment measures of tuff water rich fracture zone encountered in the construction of Changyu village tunnel entrance of Dali section I of central Yunnan water diversion project, and summarizes a set of practical and effective construction experience, which has great guiding significance for the construction of similar projects in the future.