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二滩水电站左岸导流洞出口内侧边坡的最大坡高为１４４ｍ，坡度约６３°。由于存在不利的地质构造，又受爆破和雨季地表水的影响，坡面开裂，玻体变形明显。据分析，坡体变形属蠕滑拉裂变形，坡体处于初期失稳状态。为保证工程按时截流，及时地采取了以预应力锚索为主的边坡综合整治措施。经八个多月时间的观测，边坡变形已趋于停止，加固工程效果良好。
The maximum slope height of the inside slope of the left bank diversion tunnel exit of Ertan Hydropower Station is 144m with a slope of about 63 °. Due to the unfavorable geologic structure, and due to the influence of blasting and rainy season surface water, the slope is cracked and the deformation of the glass body is obvious. According to the analysis, the deformation of the slope is a kind of creep and fissure deformation, and the slope is in the initial instability state. In order to ensure the closure of the project on time, the timely adoption of prestressed anchor-based slope comprehensive treatment measures. After more than eight months of observation, slope deformation has tended to stop and the reinforcement works well.