富水泥结碎石斜井隧洞施工技术

Construction Technique of Inclined Shaft Through Layer of Water-saturating Broken Stone Cemented with Soil

支北04支洞是万家寨引黄北干线1号引水洞的一条斜井施工支洞,地下水极其丰富,0+264￣0+336洞段围岩为泥结碎石,稳定性极差,在同类工程中是不多见的。针对该洞段特殊地质情况,提出了开挖中的关键技术问题,并进行了分析、处理。通过该斜井洞段的成功实践,总结出了富水泥结碎石斜井隧洞的施工方法,对同类工程的施工具有指导意义。

Zhibei adit NO.4 is an including shaft of tunnel NO.1 in north main line of Wanjiazhai YRDP. Groundwater of its layer is abundant. Its adjoining rock from 0＋246 to 0＋336 is broken stone cemented with soil. The geological condition is very rare in many similar tunnels. Aiming at its special geological situation, the key problems during excavating, analyzing and dealing on these problems are presentes. Through successful pratice on this tunnel, the construction method is summarized. These experiences possess directive sense for the construction of other similar projects.