云南省小湾水电站引水沟堆积体锚索施工技术与改进设计探讨

小湾水电站工程地质条件复杂、边坡防护施工难度大、施工任务及艰巨。文章主要通过引水沟堆积体2^#山梁抢险边坡工程的施工及施工中采用的特殊工艺，重点介绍偏心钻跟管钻进、双管接力钻进等施工工艺、方法以及为解决孔内多处不同深度的大裂缝跑风、漏浆的问题而采用的孔内摄像、封堵裂缝等措施。通过特殊的钻孔工艺与施工技术、经过全国几十家锚索专业施工队伍奋力的抢险，终于保住了国家大型水电站的安全。通过抢险施工，对设计尚存在的不尽完善之处提出改进意见。

Modification of anchoring cables construction technique in Xiaowan hydropower station diversion channel slope on improvement of design, Yunnan Province

Engineering geologic conditions in the site of Xiaowan hydropower station is very complicated. Slope stabilization engineering is one of very important and difficult tasks. In this paper, the authors presented and analyzed some special construction techniques used for the slope investigation and stabilization of the diversion channel slopes of No.2 mountain, such as prejudicial drilling, enveloping cranny in order to settling air leak and grout leak in drilling holes during anchoring cable construction. It is expected that these techniques will also be promising for construction works in the areas where geological conditions are complex.