Concrete dam break generally occurs in a very short period of time. Previous studies seldom consider the process and mode of dam break. According to the structural characteristics of concrete dam and the stress characteristic, we assumed three possible dam break modes, namely, sliding, toppling over, and opening. We examined the hydraulic characteristics of breach under such three modes via physical model test, and compared the test results with empirical transient failure calculation results. Comparison revealed that the calculated values of peak flow rate at breach were higher than test values in general. Among the three break modes, sliding failure witnesses the maximum flow rate with the greatest harm.The results provide guidance for revising empirical formula of dam break by taking into consideration the influence of process and mode of dam break on the hydraulic characteristics of breach.
Key words
concrete dam /
dam break modes /
sliding break /
peak flow rate /
hydraulic characteristic
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 魏文礼,沈永明,孙广才,等.二维溃坝洪水波演进的数值模拟[J].水利学报,2003,34(9):43-47.
[2] 马铁成,何建村,杨新成,等.混凝土面板坝溃决过程分析[J].水力发电,2009,(4):42-43.
[3] 傅忠友,张士辰.基于工程实例的重力坝溃决模式和溃决路径分析[J].水利水电技术,2010,41(9):57-60.
[4] 张成林.大坝瞬时全溃最大流量计算公式对比分析[J].人民黄河, 2012,34(11):29-31.
[5] 刘 磊,张红武,钟德钰,等.尾矿库漫顶溃坝模型研究[J].水利学报,2014,45(6):675-681.
[6] 胡文兵,郭红民,蔡黎明,等;考虑混凝土坝溃决过程的溃口流量过程线分析[J].水电能源科学,2017,(3):57-59.
[7] 李 云,李 君.溃坝模型试验研究综述[J].水科学进展,2009,20(2):304-310.
[8] 詹道江,徐向阳,陈元芳.工程水文学[M].4版.北京:中国水利水电出版社,2010.
[9] 吴持恭,水力学与山区河流开发保护国家重点实验室(四川大学).水力学[M].4版.北京:高等教育出版社,2008.
[10]李 炜.武汉大学水利水电学院水力学流体力学教研室.水力计算手册[M].2版.北京:中国水利水电出版社,2005.
PDF(1824 KB)
