During the normal operation of the Huangdeng Hydropower Station's reservoir, many tensile cracks were observed on the surface of the bank slope below the elevation of 1805 m along the highway, causing significant damage to local residents' production and lives. On-site geological investigation, surface and inclinometer displacement monitoring were carried out, and the deformation characteristics of the Cheyiping landslide were analyzed. A controllable intensity rainfall simulator and a reservoir water level variation simulation system were designed in our laboratory. The lower section of the highway along the river in Cheyiping small village was chosen as the prototype, and a centrifuge model test of the reactivation of the Cheyiping ancient landslide induced by rainfall and reservoir water level fluctuations was performed. The characteristics of landslide deformation, pore water pressure, and earth pressure variation under the influence of rainfall and reservoir water level changes are investigated. The thorough analysis revealed that, even if the sliding surface is not deep, the sudden drop in reservoir water level remains the primary controlling factor of slope sliding. Because the permeability of the deposit is low, rainfall has a minor impact on this ancient landslide. The experimental results can be used to guide slope prevention and reservoir management in the Huangdeng Reservoir area.

黄登水电站水库正常运行期间，公路沿线海拔1805米以下岸坡表面出现多处拉裂，给当地居民生产生活造成重大损害。开展了现场地质调查、地表和测斜仪位移监测，分析了车邑坪滑坡的变形特征。本实验室设计了强度可控降雨模拟器和水库水位变化模拟系统。以车一坪小村沿河公路下段为原型，开展了降雨和水库水位波动诱发车一坪古滑坡重新激活的离心机模型试验。研究了降雨和水库水位变化影响下滑坡变形、孔隙水压力和土压力的变化特征。深入分析表明，即使滑面不深，库水位骤降仍然是边坡滑动的主要控制因素。由于沉积物的渗透性较低，降雨对这一古老滑坡的影响较小。试验结果可用于指导黄灯库区边坡防治和水库管理。