老挝南椰2水电站引支流洞出口点施工技术

摘要

以老挝南椰2水电站引支流洞出口点开挖与支护施工工程为对象，介绍了对引支流洞出口点浅埋段、洞壁分别采用挂网喷锚、短台阶核心施工法、超前支护和钢拱架、挂网、喷锚相结合的施工技术，为浅埋段工程施工积累了经验，提前1a完成了工程施工任务，并取得了巨大的政治经济效益。%Construction technology for outlet point of the diversion branch tunnel in Nam Ngiep 2 hydropower station in Laos are presented, which includes the shotcrete with anchored net, core construction technique with short steps, early supporting technique and the combination of steel arch rack, anchored net and shotcrete.The experiences are of great value and both economic and political benefits are obtained.