浅谈锚喷技术在地下洞室中的应用

Discussion on Application of Bolt-shotcrete Support Technique in Underground Cavern

目前国内大小水电工程几乎都涉及到地下洞室的支护,尤其是临时支护。合理运用相应的支护手段对地下洞室进行有效的支护,既节省投资,又能够高效率的推进工程的进展,是一项工程追求的目标,也是工程地质研究的方向。锚喷支护运用得当是最高效率的一种施工方法,但很多人对锚喷支护的效果有所怀疑,进而增加拱架支护,这样做不仅增加了不必要的投资,而且延缓了工期。以盖下坝水电站工程1#交通洞的锚喷支护效果计算为例,使大家对锚喷支护技术有一定的了解。

At present underground support,especially the temporary support is involved in almost all the hydropower projects.The use of appropriate means of underground cavern support which can not only save investment,but also promote the progress of the project,has been a project goal for geological research.Bolt-shotcrete support is the most efficient mean of construction methods,but many people have suspected the effect of bolt-shotcrete support and put forward the arch support leading to the unnecessary investment and delaying the construction period.The paper discusses the example of the calculated effect of bolt-shotcrete support of Gaixia dam hydropower project 1#,and highlights the bolt-shotcrete support.