柳洪水电站长斜井开挖施工技术研究与实践

The Research and Practice of Excavation Construction Technology for Long Inclined-shaft of Liuhong Hydropower Station

柳洪水电站压力管道下斜井分三个阶段施工,先是采用人工导洞、反井钻先导孔,实现导孔对接,再采用反井钻导孔扩挖,最后进行全断面人工开挖。通过对柳洪水电站长斜井开挖施工技术的研究及实践,取得了反井钻机开挖斜井导向孔与人工开挖斜井导洞成功对接、扩挖一次成形的成果,实现了水电史上反井钻机开挖大倾角长斜井历史性的突破,为我国水电领域大倾角、长斜井开挖积累了成功经验。

The construction of lower inclined shaft of the penstock of the Liuhong hydropower station was divided into three stages. The first stage is that man-made guide-hole excavation and raise boring to realize the connection of guide holes. The second stage is to enlarge excavation of raise boring of guide hole. The third stage is man-made full-section excavation. Through the research on the excavation construction of long inclined-shaft of Liuhong hydropower station, the raise boring of guide hole of inclined shaft successfully connected with the man-made excavation of guide hole of inclined shaft. The historical breakthrough of raise boring of big dip and long inclined shaft has been realized, which accumulates successful experience for the excavation of big dip and long inclined shaft in the hydropower development in China.