大岗山水电站右岸边坡稳定性研究

Study of right bank slope stability of Dagangshan Hydropower Station

大岗山水电站右岸边坡发育有辉绿岩脉、中倾坡外的断层、卸荷裂隙密集带及裂隙等,构成了控制边坡稳定性的主要结构面。主要介绍了右岸边坡控制性结构面的工程地质性状及不同组合模式对边坡稳定的不利影响,通过大量的地质测绘和试验研究,得到了详实、准确的地质参数,采取了锚索加固,抗剪洞+锚固洞+斜井等处理措施。治理后的监测和分析表明,右岸边坡加固措施有效,整体基本稳定。

The main geological structures developed in the slope of right bank of Dagangshan hydropower station include diabase dikes,outcropped faults with moderate inclination,dense unloading fracture belts and primary fractures,which form the main structure planes that control the slope stability.We studied the engineering geological characters of the controlling structural planes and the influences of different combination patterns on slope stability.According to massive geological mapping and test research,we obtained detailed and accurate geological parameters.The treatment measures of anchor cable reinforcement,shearing-resistance tunnel together with anchor hole and inclined shaft are adopted.The monitoring and analysis after the treatment show that the reinforcement measures to the right bank slope are effective and the slope is stable as a whole.