金桥水电站工程裂隙发育高大岩质边坡预应力锚索的施工要点分析

Analysis on construction key points of prestressed anchor cables for high rock slopes with crack development in Jinqiao Hydropower Station

预应力锚固技术可以有效地对高边坡、地下洞室、水工建筑物等进行加固和补强。本文以金桥水电站工程右坝肩高大边坡加固为实例,对预应力锚索在裂隙发育岩石边坡这一不良地质条件下的成孔、孔壁加固、内锚段处理、灌浆和张拉过程的施工要点和难点进行了较为全面的阐述和总结,既高效又实用,可供类似工程地质条件下的锚索施工借鉴参考。

Prestressed anchorage technology can be applied to effectively reinforce and strengthen high slopes,underground caverns,hydraulic buildings,etc.The right abutment high slope reinforcement in Jinqiao Hydropower Station Project is adopted as an example in the paper.The construction keys and difficulties of the prestressed anchor cable during hole formation,hole wall reinforcement,inner anchor section processing,grouting and tensile process under the poor geological condition of crack development rock slopes are described and summarized more comprehensively.It is efficient and practical,which can be adopted as reference for anchor cable construction under similar engineering geological conditions.