黄登水电站复杂地质条件下坝基建基面开挖施工技术

The Excavation and Construction Techniques of Dam Foundation Base of Huangdeng Hydropower Station under Complicated Geological Condition

黄登水电站是澜沧江上游曲孜卡至苗尾河段水电梯级开发方案的第六级水电站,是目前在建的世界最高碾压混凝土重力坝。黄登水电站坝基建基面开挖对超欠挖值、半孔率和平整度等质量指标控制标准严格,施工中形成了一套可操作性强、行之有效的施工方法。文章细述了复杂地质条件下的坝基开挖施工实践,对坝基建基面开挖施工方法及控制措施进行了进一步总结,对今后类似工程开挖施工有一定的借鉴意义。

As the VI hydropower station on Lancang River from Quzika to Miaoweihe section, Huangdeng hy- dropower station is the world＇s highest roller compacted concrete gravity dam under construction. The excavation of dam foundation base has to strictly follow quality control standards of owe or ultra digging value, semi hole ratio and flatness. During the construction, a series of effective and feasible construction methods are found. In this paper, the practical experience of excavation of dam foundation base is introduced, and relevant construction techniques and quality control measures are summarized, which can provide reference for similar projects.