局部逐渐溃坝机理研究及溃口水流模拟  

Study on Mechanism of Partial Gradual Dam-break and Simulation of Burst Flow

作　　者：张建国 宁培 殷康 宋振聪 ZHANG Jianguo;NING Pei;YIN Kang;SONG Zhencong(Hydrochina Zhongnan Engineering CO.LTD.,Changsha 410014,China;Henan Luoning Pump Storage CO.LTD.,Luoning 471700,China)

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014 [2]河南省洛宁抽水蓄能有限公司,河南洛宁471700

出　　处：《河南水利与南水北调》2022年第5期82-84,共3页Henan Water Resources & South-to-North Water Diversion

摘　　要：针对目前的局部逐渐溃坝模型,对崩塌土体进行稳定分析。首次结合溃口侵蚀发展过程,以及随时间的上游库区水位变化情况,应用极限平衡理论改进OSMAN的侵蚀崩塌模型,分析整个堤坝溃决过程中的溃口冲刷、横竖向的侵蚀扩展以及溃口崩塌情况,再依据改进的堤坝溃决理论,获取溃决发展过程中各时刻的溃口几何形状,并尝试使用流体力学软件Fluent,根据其湍流模块的相关理论,模拟各个时刻较为复杂溃口形状的溃坝水流形态。Based on the current model of partial gradual dam-break, the stability of collapsed soil is analyzed. For the first time,erosion and collapse model of OSMAN is improved by limiting equilibrium theory based on the development process of erosion and the change of upstream reservoir water level over time, and the erosion and collapse situation of the whole process of dike failure is analyzed. Then, according to the improved dike break theory, the geometric shape of the breach at each moment in the development process of the breach is obtained. According to the theory of turbulence module of fluid dynamics software Fluent, the flow pattern of dam-break with complex break shape at each moment is tried to simulate by using the software.

关 键 词：溃坝 稳定分析 极限平衡 侵蚀 水流形态 

分 类 号：TV13[水利工程—水力学及河流动力学]