河道截流工程技术数值模拟

Numerical simulation on river closure

针对淮河临淮岗工程河道截流实际情况,采用水深平均的圣—维南方程组描述水流运动规律来建立二维水流数学模型,通过生成河道的正交曲线网格,进行截流水力学计算。重点分析两种截流方案中不采用定位沉船和采用定位沉船情况下龙口水力特征参数的变化,并利用截流难度评判指标来确定采用定位沉船技术对降低截流难度的作用,评价采用"单戗堤、单向进占、定位沉船、双向合龙"技术的必要性,选择适应于本工程的截流方案。

In accordance with the actual condition of the river closure of Linhuaigang Project on Huaihe River,the Saint-Venant equations of average water depth is adopted to describe the law of flow movement,so as to establish the two-dimensional flow mathematical model,and then the hydraulic calculation for the river closure is fulfilled through generating the orthogonal curvilinear grids of the river channel.The changes of hydraulic characteristic parameters of the closure gap for two kinds of river closure schemes...