库区公路K243滑坡形成机制及治理措施

依托澜沧江黄登水电站库区沿江公路K243滑坡工程实例，对新生工程滑坡和古滑坡的成因机制、变形破坏模式及治理措施进行研究，分析滑坡多工况组合条件下的稳定状态和剩余下滑力；运用GEO5软件建立滑坡模型，分析抗滑桩内力及位移变化，以及不同治理施工过程中的滑坡稳定性变化规律。研究结果表明：K243滑坡采用双排刚架抗滑桩、锚索桩板墙、填土反压及截排水等措施进行治理，效果显著；新生工程滑坡后排桩剪力和弯矩均大于前排桩，后排桩桩顶位移大于前排桩，而古滑坡前排桩的剪力及位移均大于后排桩；新生工程滑坡在不同施工过程中的稳定系数提高比例约为古滑坡的一倍。实践证明，K243滑坡治理是成功的，可为库区公路滑坡分析与治理提供参考。

Study on the Formation Mechanism and Treatment Measures of K243 Landslide on Highway in Reservoir Area

Based on the example of landslide project K243 along the river road in the reservoir area of Lancang River Huangdeng Hydropower Station, the study was conducted on the formation mechanism, deformation and failure mode, and treatment measures of the freshman engineering landslide and the ancient landslide, and the stable condition and residual sliding force of the landslide under the combination of multiple working conditions. The GEO5 software was used to establish the landslide model and analyze the changes in the internal force and displacement of the anti-slip pile, as well as the variation in the landslide stability during different treatment construction processes. The results of the study show that the K243 landslide is effectively managed by using the double-row rigid frame anti-slide pile, anchored sheet pile wall, filling earth counter pressure, and water interception and drainage measures. The shearing force and bending moment of the back row pile of the freshman engineering landslide are greater than front row pile, and the displacement of pile top of the back row pile is greater than that of the front row pile, while the shearing force and displacement of the front row piles of the ancient landslide are greater than back row pile. The percentage increase in the stability coefficient of the freshman engineering landslide during different construction processes is approximately double that of the ancient landslide. The K243 landslide treatment has proved to be successful and can provide a reference for the analysis and treatment of road landslides in the reservoir area.