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大岗山水电站坝址区山体雄厚、岸坡陡峻,地形地质条件复杂。右岸工程边坡规模巨大,地质构造发育,卸荷风化强烈,地震烈度高,坡体结构复杂,边坡稳定性问题极为突出。以工程地质条件为基础,深入研究边坡的潜在滑移模式,并结合现场施工条件,提出右岸边坡卸荷裂隙密集带综合加固处理方案。采用多种方法对边坡稳定性进行了计算分析,计算结果表明,加固处理后的右岸边坡满足稳定性控制标准;同时,现场监测资料也表明,目前边坡稳定性状态良好,边坡加固处理方案合理、有效。
Dagangshan Hydropower Station dam area is rich in mountainous, steep slope, topography and geological conditions are complex. The scale of the right bank slope is huge, the geological structure is developed, the unloading is weathered strongly, the seismic intensity is high, the slope body structure is complex, and the slope stability problem is extremely prominent. Based on the engineering geological conditions, the potential slip mode of the slope is studied in depth, and combined with the on-site construction conditions, a comprehensive reinforcement scheme of the unloading fissure intensive zone on the right bank slope is proposed. The slope stability is calculated and analyzed by a variety of methods. The calculation results show that the right bank slope after reinforcement treatment meets the stability control standard. Meanwhile, the on-site monitoring data also show that the current slope stability is good. Reinforcement scheme is reasonable and effective.