河道水下岛对滑坡涌浪近场特性影响的物理模型试验研究  

Physical model experiment study on the influence of river-submerged islands on near field characteristics of landslide-generated wave

作　　者：张玉洁 唐扬 汪洋[3] 张慎[1] 许文洁 ZHANG Yujie;TANG Yang;WANG Yang;ZHANG Shen;XU Wenjie(Central-south Architectural Design Institute Co.,Ltd.,Wuhan 430071,China;Changjiang River Scientific Research Institute,Changjiang River Water Resources Commission,Wuhan 430071,China;Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]中南建筑设计院股份有限公司,湖北武汉430071 [2]长江水利委员会长江科学院,湖北武汉430071 [3]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《安全与环境工程》2025年第1期223-232,共10页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(42107160);湖北省科技创新助企纾困类与包保(联)企业帮扶类项目(2022BAD168)。

摘　　要：河道水下岛的存在会增加滑坡涌浪灾害的不确定性,已有的滑坡涌浪物理模型试验研究较少考虑这一因素带来的影响。为探究河道水下岛对滑坡涌浪近场特性的影响规律,采用全面搭配法,共开展了50组滑坡涌浪室内物理模型试验,通过改变河道水下岛的高度(S)和距滑坡入水口的距离(xd),展开了对河道水下岛影响滑坡涌浪近场特性规律的研究。结果表明:存在河道水下岛时滑坡涌浪的波幅较无河道水下岛时滑坡涌浪的波幅普遍偏大;在河道水下岛距滑坡入水口的距离不变的条件下,滑坡涌浪的波幅随着河道水下岛高度的增加先增大后减小;在河道水下岛高度不变的条件下,滑坡涌浪的波幅随着河道水下岛距滑坡入水口距离的增加呈增大趋势;河道水下岛对滑坡涌浪波幅和传播衰减规律的影响主要集中在相对传播半径7~9之间。物理模型研究结论为水库滑坡涌浪灾害的预测预报提供了试验数据和理论依据。The river-submerged islands(RSI)increase the uncertainty of landslide surge disasters.Numerous researches study on the physical model of landslide waves have paid little attention to the influence of RSI.To explore the influence on the RSI,this study conducted 50 sets of landslide-generated wave physical model experiments,and the height(S)of the river-submerged island and its distance(xd)from the landslide’s shear outlet were treated as control variables.The results are the following:the amplitude of waves generated with the RSI is generally more significant than the waves generated without the RSI;when the distance(xd)remains constant,the amplitude of waves generally increases first and then decreases with the increasing of height(S);when the height(S)remains constant,the amplitude of waves increases line to the distance(xd);the influenced range of RSI is mainly concentrated in the relative propagation radius of 7 to 9.The research conclusions provide rich experimental data and a reliable theoretical basis for predicting reservoir landslide surge disasters.

关 键 词：滑坡 滑坡涌浪 河道水下岛 传播规律 物理模型 

分 类 号：X43[环境科学与工程—灾害防治]