卞家寨堆积体滑坡涌浪灾害链分析及应用

Analysis and Application of Landslide Surge Disaster Chain in Bianjiazhai Accumulation

笔者以卞家寨堆积体为依托,选取SPH-DEM耦合方法、浅水波方程、潘家铮法对堆积体滑坡涌浪进行计算分析。通过建立数值计算模型,计算分析滑坡涌浪的特征及涌浪传播过程。根据三种数值计算结果,对卞家寨堆积体滑坡涌浪灾害链进行分析和灾害评估,提出灾害防范措施。结果表明,索风营水电站保持库水位日降幅控制在3 m内高水位运行,更有利于堆积体稳定且可多发电量;应用GNSS系统可实现对堆积体变化的全自动监测,及时预警。该研究成果可推广应用至乌江全流域水电站及国内其他同类工程。

Based on Bianjiazhai accumulation,the SPH-DEM coupling method,shallow water wave equation and Pan Jiazheng method are selected to calculate and analyze the landslide surge of the accumulation.By establishing a numerical calculation model,the characteristics of landslide surge and the propagation process of surge are calculated and analyzed.According to the three numerical calculation results,the analysis and disaster assessment of the landslide surge disaster chain of Bianjiazhai accumulation are carried out,and the disaster prevention measures are put forward.The results show that the daily decline of reservoir water level of Suofengying Hydropower Station is controlled within 3 m,which is more conducive to the stability of accumulation body and more power generation;The application of GNSS system can realize the automatic monitoring of the accumulation body change and timely warning.The research results can be applied to hydropower stations in the whole Wujiang River basin and other similar projects in China.