V形河谷滑坡最大冲击波面高度估计  

Estimation of maximum water elevation of impact wave by landslide in a V-shaped river valley

作　　者：孔增增 翟建国 黄筱云[1,2] 刘灿 程永舟[1,2] KONG Zengzeng;ZHAI Jianguo;HUANG Xiaoyun;LIU Can;CHEN Yongzhou(School of Hydraulic Engineering,Changsha University of Science ＆ Technology, Changsha 410004,China;Key Laboratory o f Water ＆ Sediment Science and Water Hazard Prevention of Hunan Province, Changsha 41000 4,China;CCCC Wuhan Harbor Engineering Design and Research Co., Ltd., Wuhan 430040)

机构地区：[1]长沙理工大学水利工程学院,湖南长沙410004 [2]水沙科学与水灾害防治湖南省重点实验室,湖南长沙410004 [3]中交武汉港湾工程设计研究院有限公司,湖北武汉430040

出　　处：《水利水电科技进展》2018年第3期15-21,共7页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(51309036);湖南省自然科学基金(2015JJ2006);湖南省水利科技项目(湘水科技[2015]13-20)

摘　　要：提出一种计算V形河谷滑坡冲击波浪最大波面高度的经验公式。运用Flow-3D软件建立V形河谷滑坡冲击波浪传播的数值模型,开展96种工况的数值模拟试验,分析滑坡体的入水速度、入水体积、水下滑行时长以及滑坡角度和对岸爬坡角度对最大波浪高度的影响,并回归分析获得最大波面高度的拟合公式。新公式用于估计龚家坊滑坡产生的最大冲击波面高度,计算结果与物理模型试验值吻合。An empirical estimation formula for the maximum water elevation of the impact wave generated by the landslide in a V-shaped river valley is presented. Using the Flow-3 D software,a numerical model of the impact wave resulting from the landslide in a V-shaped river valley was established and numerical experiments under 96 conditions were carried out.Effects of the inserting velocity of landslide into water,landslide volume,time of underwater sliding,inserting angle and climbing angle on the maximum water elevation were analyzed respectively. The fitting formula of the maximum water elevation was obtained by regression analysis. The new formula was used to evaluate the maximum water elevation for the Gongjiafang landslide event,and it is shown that the calculated result is very close to the value of the physical experiment.

关 键 词：V形河谷 最大冲击波面高度 经验公式 Flow-3D 

分 类 号：TV139.2[水利工程—水力学及河流动力学]