黄金坪水电站深厚覆盖层跟管钻进工艺研究

Technology Research on Drilling in Deep Alluvium with Case in Huangjinping Hydropower Station

摘要:

结合大渡河黄金坪电站深厚覆盖层帷幕灌浆试验项目需要，对深厚覆盖层跟76 m深套管护壁钻进这一高难度技术进行攻关研究，并提出两级跟管的钻孔结构，圆满实现了试验灌浆孔非灌段跟76 m深套管的目标，为今后类似工程跟管施工提供了重要的参考借鉴作用。

Abstract:

According to the requirement of curtain grouting test in deep alluvium of Huangjinping hydropower station, research was made on highly-difficult technology of drilling with 76m long case, and the borehole structure with two-step casing was put forward.