水流动力条件下滑坡涌浪初始波浪特征研究

Initial wave characteristics of landslide surges under current condition

借助水流动力条件下弯道浅水区三维散体岩质滑坡涌浪模型试验系统,研究水流动力条件下滑坡涌浪的初始涌浪基本特征和首浪高度的确定方法。根据物理模型试验观测资料,统计计算得到初始涌浪的最大波高、最大周期、有效波高、有效周期及波陡特征值;分析滑坡倾角、滑坡方量、河道水深、水流流速对首浪高度的影响;采用无量纲及多元回归分析方法,给出首浪高度的计算公式。采用长江新滩滑坡涌浪实测资料,将本文给出的首浪高度计算公式与Noda公式、Slingerland公式、潘家铮公式、殷坤龙公式、中国水利水电科学研究院公式进行对比,表明本文公式计算值与实测值相差最小。

The basic characteristics of initial wave and the determination method of the first wave height of landslide surges under current condition are studied by means of the 3D model test system of wave induced by granular rock landslide in curved shallow water area.According to the observation data of physical model test,we calculate statistically the maximum wave height,maximum period,effective wave height,effective period and wave steepness characteristic values of initial surge,analyze the effects of landslide angle,landslide volume,river depth and current velocity on the height of the first wave,and give the calculation formula of head wave height by using dimensionless and multiple regression analysis.Using the measured data of surge wave in Xintan landslide of the Yangtze River,we compare the formulas given in this paper with Noda formula,Slingerland formula,Pan Jiazheng formula,Yin Kunlong formula and formula of China Institute of Water Resources and Hydropower Research,and come to the conclusion that the difference between the calculated and measured values in this paper is the least.