摘要
三峡库区涉水滑坡分布广泛,其运动方式、涌浪波特征与涉水情况紧密相关。现有的滑坡涌浪预测方法中,鲜有考虑滑坡涉水情况对涌浪的影响。基于此,通过滑坡物理概化模型试验,对涉水滑坡涌浪特征及不同淹没度λ(滑体滑动前水下部分滑体体积与整体体积之比)情况下滑坡涌浪首浪最大波高计算公式进行研究。研究发现:随着淹没度的增加,滑坡涌浪类型逐渐由水上滑坡涌浪向水下滑坡涌浪转变,且涌浪波高逐渐减小。结合试验数据通过非线性回归分析得出涉水滑坡涌浪首浪最大波高计算公式,与Node公式、潘家铮公式相比较,所推导的经验公式适合涉水滑坡涌浪首浪最大波高计算,预测精度更高,可为涉水滑坡涌浪灾害预测预报分析提供参考。
The wading landslides in the Three Gorges Reservoir area are widely distributed,and their movement mode and impulse wave characteristics are closely related to the wading situation.Existing methods for predicting landslide impulse waves rarely consider the influence of landslide wading.Therefore,a physical generalized model test of landslides was conducted to study the impulse wave characteristics of wading landslides and the calculation formula for the maximum wave height of the initial wave of a landslide impulse wave under varying submergence degrees(defined as the ratio of the volume of the submerged part of the sliding body to the total volume before sliding).It was observed that as submergence increases,the type of landslide impulse wave transitions from a water landslide impulse wave to an underwater landslide impulse wave,leading to a gradual decrease in impulse wave height.By analyzing experimental data,a calculation formula for the maximum wave height of the initial impulse wave of wading landslides was derived through nonlinear regression analysis.A comparison with the formula proposed by Node and Pan Jiazheng showed that the empirical formula obtained is more suitable for calculating the maximum wave height of the initial impulse wave of wading landslides,with higher prediction accuracy.This formula can serve as a valuable reference for predicting and analyzing impulse wave disasters caused by wading landslides.
作者
李秋旺
冯万里
黄波林
董星辰
陈云飞
LI Qiu-wang;FENG Wan-li;HUANG Bo-lin;DONG Xing-chen;CHEN Yun-fei(Hubei Yangtze Three Gorges Landslide National Field Scientific Observation and Research Station,Yichang,Hubei 443002,China;State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Ecological Environment and Resources,Chinese Academy of Sciences,Lanzhou,Gansu 730000,China;University of Chinese Academy of Sciences,Beijing 101408,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2024年第S01期424-432,共9页
Rock and Soil Mechanics
基金
国家自然科学基金(No.42077234)
关键词
涉水滑坡
淹没度
首浪最大波高
预测预报
wading landslide
submergence
maximum wave height of first wave
forecast
