The Xiahongyan accumulation slope is located at the right valley shoulder of the dam site of Baihetan hydropower station, which is giant and creepy. It exerts great impact on the safety of the project. North-south longitudinal length of the accumulation slope is about 1 800 m, and east-west transverse width is 115~740 m. Its volume is about 18 million m³, with a plane area of about 0.82 km²

and an average thickness of about 22 m. The deformation monitoring and surface fracture investigation show that Xiahongyan accumulation slope is in a state of creep and its deformation direction and degree are zoned. Combined with the zoned characteristics of deformation, different sections are selected to analyze the slope stability. Then, a comprehensive treatment scheme of "berming with spoil, anti-slip pile and local slope anchorage" is proposed. The monitoring results show that the treatment measures have achieved the expected results, providing reference for design and research of similar projects.

accumulation slope, deformation characteristics, treatment, Baihetan hydropower station

下红岩堆积体位于白鹤滩水电站坝址右岸谷肩部位，为巨型蠕滑堆积体，对工程安全影响大。堆积体南北纵向长约1 800 m，东西横向宽115~740 m，平面面积约0.82 km²，平均厚度约22 m，体积约1 800万m³。通过变形监测、地表裂缝调查研究发现，天然的下红岩堆积体处于蠕滑状态，其变形方向和变形程度具有分区特征。根据分区变形特征选取剖面计算分析边坡稳定性，提出“堆渣压坡、抗滑桩和局部坡面锚固”的综合处理方案。监测结果表明处理措施取得了预期的效果，可为类似工程设计研究提供借鉴。

堆积体, 变形特征, 治理, 白鹤滩水电站