卡拉水电站田三滑坡体失稳机理及涌浪计算

Analysis of Instability Mechanisms and Surge of Tiansan Landslide at Kala Hydropower Station

结合雅砻江卡拉水电站田三滑坡体工程地质条件,对滑坡变形及涌浪的影响进行深入分析。在总结国内外滑坡涌浪预警实践经验的基础上,研究滑坡运动的过程,对比分析了速度大小、涌浪过程的变化规律。研究表明,在滑坡涌浪的入水初速度及库水深度一定的前提下,田三滑坡体具有初始涌浪高、爬坡高的特点,特别是在库水水位下降时,更要加强监测和预报。针对坝址比选,建议该水电站采用下坝址方案,且坝体设计需要考虑抗涌浪冲击;须结合工程特点,做好工程配套设施建设的选址工作。

In combination with the conditions of engineering geology of Tiansan landslide at Kala hydropower station on the Yalong River,the influence of formation and surge of landslide are studied.Based on the summary of the experimences and lessons from practices of landslide surge early-warning at home and abroad,with the study on the motion process of landslide,velocity and variation rules of surge undulation are analyzed.According to the research,under the precondition of certain initial velocity and depth of reservoir,Tiansan landslide has the characters of great initial surge height and climbing height,especially the monitoring and predication work must be reinforced under the condition of drawdown.Aiming at the dam sites scheme comparison,it is suggested that the lower dam site plan is better to be taken and the resisting surge wave shock should be considered in dam site design.Combining the characteristic of project, the primary job is the location selection work of the project supporting facilities.