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剧冲式滑坡涌浪灾害对航运和沿岸居民生命财产安全会造成巨大的灾害。通过建立河道高速滑坡涌浪的理论模型,采用计算流体力学软件,仿真再现了高速滑坡涌浪的特征,分析了涌浪形成的动力学机理。数值模拟结果表明:在同一时刻,水深和滑体体积所造成的涌浪的形态和高度各不相同,滑体体积对涌浪高度的影响最大,其次是水深,而入水速度的影响较小;滑体在水中运动过程中,滑体前方局部水压急剧增大,可达到数十个大气压,如此巨大的压力足以将水体推高到几十米高;滑体在运动过程中,前方水压整体呈下降趋势,而后又增大。通过滑坡涌浪预测研究,对有效地采取避让涌浪灾害的措施具有重要的现实意义。
Dramatic landslide waves can cause great disasters to the life and property of shipping and coastal residents. Through the establishment of the theoretical model of high-speed landslide waves in the riverway, the computational fluid dynamics software was used to simulate the characteristics of the high-speed landslide wave and to analyze the dynamic mechanism of the surge formation. Numerical simulation results show that at the same time, the shape and height of the surging caused by the depth of water and the volume of the slide body are different, the volume of the slide body has the strongest influence on the wave height, followed by the water depth, During the movement of the slide body in the water, the local water pressure in front of the slide body increases sharply to reach several tens of atmospheres. Such a huge pressure is sufficient to push the water body up to several tens of meters in height. During the movement of the slide body, the front water pressure The overall downward trend, and then increased. Through the study of landslide surge prediction, it is of great practical significance to effectively take measures to avoid surge.