某库区潜在滑坡涌浪计算与分析

Surge Calculation and Analysis on Potential Reservoir Landslide

针对失稳滑坡高速入水激起涌浪造成的地质危害,采用水科院经验公式法以及潘家铮法,讨论了某库区潜在滑坡不同水位时失稳产生的初始浪高、对岸浪高及不同距离处的最大浪高。通过对影响涌浪因素的敏感性分析,结论如下:库水位的变化对入水速度、初始浪高、对岸浪高的影响并不十分显著;入水速度的变化对滑坡涌浪高度的影响较显著;不同水位下,距离的变化对涌浪的影响并不十分显著;滑坡倾角的变化和内摩擦角的变化对涌浪高度的影响显著。

This paper discusses the surge hazards induced by the high velocity landslides into the reservoir pool. Several formu- las, such as, empirical formulas proposed by IWHR and Pan Jiazheng, have been applied in the surge height prediction. The initial surge height, surge at the opposite bank and at various locations from the sliding under the proposed landslide with dif- ferent pool water levels are predicted and a parametric study has been performed to find out the most sensitive factors on the surge. The following conclusions are obtained： The impact of pool water level changes on the sliding body velocity into the water, initial surge height and height at the opposite bank is not significant the impact of velocity of the sliding body into the water on the surge height is significant~ under different pool water levels, the distance from the sliding location has minimal impact on the surge height. The inclination of the sliding body and the internal friction angle on the surge height is large.