枕头坝一级水电站堆积体深孔锚索成孔工艺试验与研究

Test and Research on Technology of Deep Hole Completion for Anchor Cable in Accumulation Body

摘要:

在深厚堆积体中锚索成孔困难，尤其是80 m以上锚索成孔的经验匮乏。为解决枕头坝一级水电站1号堆积体深孔锚索成孔难题，通过实验排除单层和双层套管成孔方法，选取单层套管与护壁灌浆相结合的施工工艺，实践证明，该工艺在工效、经济性方面效果较好，是解决堆积体深孔锚索造孔的有效途径。

Abstract:

It is hard to complete a deep hole for anchor cable in thick accumulation body, especially for those with depth of more than 80 m. In Zhentouba first stage hydropower station, in order to complete the deep hole in 1# accumulation body, the combination of single layer casing and wall protection grouting was selected. The practice shows that this technology is effective to complete deep hole for anchor cable in accumulation body.