土石坝水库溃坝洪水非恒定流演进计算应用研究  

Study on the Application and Calculation of Unsteady Flow Routing of Earth-rock Dam Reservoir Break Flood

作　　者：唐旭辉 TANG Xuhui(Sichuan Academy of Water Conservancy,Chengdu Sichuan 610072)

机构地区：[1]四川省水利科学研究院,四川成都610072

出　　处：《四川水力发电》2023年第2期125-131,共7页Sichuan Hydropower

摘　　要：本文通过对老鹰嘴水库工程土石坝溃坝洪水研究,预测水库大坝溃口发生的过程(如形状、深度、宽度、溃口扩张的速度等),计算溃口出水流量,通过水库库容演算,预测水库溃口过流量的过程线;对大坝在正常蓄水位、大坝校核洪水、大漫顶三种情况下的溃坝洪水,进行了下游河段洪水非恒定流演进计算,分析最不利为大坝漫顶工况,并在大坝漫顶工况下根据不同溃决状态,分别计算出1/4溃决、1/2溃决、全溃决的下游淹没水位、影响范围人口等数据,为制定相应的应急措施提供依据。Based on the study on the earth-rock dam break flood of Laoyingzui Project,this paper predicts the process of the dam break(such as shape,depth,width,speed of the expansion of the dam break,etc.),calculates the flow at the dam break,and predicts the process line of the overflow of the reservoir break through the reservoir storage capacity calculation.For the dam break flood under three conditions(normal water level,dam check flood and over-topping),the unsteady flow evolution calculation of the downstream river section flood is carried out and the most unfavorable condition is over-topping.Under the over-topping condition,according to different failure states,the downstream submerged water and population in the affected area level of 1/4 break,1/2 breach and full break,and the population in the affected area are calculated respectively,the results can provide a basis for formulating corresponding emergency measures.

关 键 词：土石坝 溃坝洪水 数学模型 洪水过程线 

分 类 号：TV641[水利工程—水利水电工程] P343.3[天文地球—水文科学] TV122.4[天文地球—地球物理学]