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自进式锚杆是将钻孔、注浆、锚杆安装、锚固等合为一体的新型锚杆,它比较适用于断层破碎带等破碎岩层。某水电站开挖形成的大坝坝肩及各引水洞进口边坡最大高差达150m。由于受边坡复杂地质因素的影响,边坡支护采用普通砂浆锚杆造孔十分困难,造成支护工程进度滞后。经研究,采用自进式锚杆,解决了锚杆难以成孔的困难,取得了良好的效果。
Self-made anchor is a new type of anchor that integrates drilling, grouting, anchor installation, anchoring and so on. It is more suitable for broken rock strata such as fault fracture zone. The maximum height difference between the dam abutment formed at the excavation of a hydropower station and the inlet slope of each diversion tunnel reaches 150m. Due to the complicated geologic factors of slope, it is very difficult to make holes in the slope support by ordinary mortar anchor, resulting in the lagging behind of the support project. The study, the use of self-made anchor, bolt difficult to solve the difficulties, and achieved good results.