以董箐水电站为例,采用三维有限元法分析了溢洪道泄槽段边坡施工期和运行期各种工况下的变形稳定性。为确保边坡安全,在加强监测工作的情况下采用预应力锚索和系统锚杆同时加固方案。结果表明,泄槽段进口处两侧边坡台阶处均存在拉剪屈服危险,暴雨和地震是影响边坡稳定的最重要因素,当考虑地震和暴雨联合作用时边坡将处于较危险状态,采取的防范措施切实可行。 Taking Dongliu Hydropower Station as an example, the deformation stability of slopes in spillway spillway section under various working conditions during construction and operation period was analyzed with 3D finite element method. In order to ensure the safety of slope, the reinforcement scheme of prestressed anchor cable and system anchor rod is adopted in the strengthening of monitoring work. The results show that there is danger of tensile shear yielding at the slope on both sides of the entrance of the spillway section. Rainstorms and earthquakes are the most important factors that affect the stability of the slope. When the joint action of earthquake and heavy rain is considered, the slope will be in a more dangerous state, The precautionary measures taken are feasible.