摘要
洺河渡槽是南水北调中线干线工程重要的大型输水建筑物,外部环境的变化可能对工程安全运行带来隐患。为检验复核洺河渡槽交叉河道的行洪能力,在现场实际测量、并进行数字化处理基础上,针对不同糙率条件下100年、300年一遇的设计洪水,构建二维洪水演进数值模型,利用Mike21模型模拟洪水从上游河道经交叉建筑物向下游演进的全过程,判定洪水过流对渡槽影响。拟演算结果显示,最不利条件(n=0.035)下满足洪水槽身不挡水的要求。
The Minghe Aqueduct is an important large water transport structure for the middle route of the South-to-North Water Transfer project.The change of external environment may bring hidden dangers to the safe operation of the project.In order to check and review the flood discharge capacity of the cross channel of the Ming River Aqueduct,based on the actual on-site measurement and digital processing,and aiming at the 100-year and 300-year design floods under different roughness conditions,a two-dimensional numerical model of flood evolution is constructed.The MIKE21 model is used to simulate the whole process of flood evolution from the upstream channel to the downstream through crossing buildings.Determine the influence of flood flow on aqueduct.The simulation results show that the most unfavorable conditions(n=0.035)meet the requirements of the flood tank body without water blocking.
作者
白振江
时启军
BAI Zhen-jiang;SHI Qi-jun
出处
《东北水利水电》
2025年第2期34-38,71,共6页
Water Resources & Hydropower of Northeast China
关键词
南水北调
洺河渡槽
水动力模型
模拟演算
防洪复核
South-to-North Water Transfer
Minghe Aqueduct
hydrodynamic model simulation calculus
flood control review
