船闸引航道最不利流态水力参数的确定方法

The method for determining the hydraulic parameters of the most unfavorable flow pattern of lock approach

结合盐邵船闸采用规范中的公式计算、模型试验、原型现场实测3种方式,分别得到引航道最不利流态时的泄流量及对应的闸室水位和输水廊道闸门开启时间等参数,对比分析了各方法所得参数的差异及成因.结果发现:数学模型常用规范中公式计算得出的引航道最不利流态出现时的闸室泄流量偏小,闸室水位偏低,输水廊道闸门开启时间偏长.在此基础上提出了改进公式的计算方法.

Combined with the methods used in the specification in Yanshao Ship Lock such as formula computing,model test and field measurement,the most unfavorable flow regime at the time of discharge and the corresponding chamber parameters such as the filling and emptying culvert water level and gate opening time are obtained.The discrepancy of parameters from different methods and its formation mechanism are discussed.The results show that by the mathematical models commonly used in the specification formula calculation the most unfavorable flow appears smaller lock chamber discharge,the lock chamber water level is lower and the culvert gate opening time becomes slightly longer.Therefore the improved formula of calculating method is proposed.