水闸底流消能计算公式的分析与改进

以上海市东风西沙水库下游水闸消能设计为例,对水闸消能计算中遇到的问题加以分析后发现,在上游水位不变、过闸单宽流量不变、下游水深较小的情况下,下游水深越小,采用《水闸设计规范》(SL265—2001)中的消能计算公式计算得到的消力池深度反而越小,这与实际情况有较大的出入。通过理论推算,对原计算公式进行了修正,并采用修正后的计算公式进行了消能计算,计算结果与实际情况相符。

Analysis and Improvement of the Formula of Sluice' s Energy Dissipation Calculation

In the sluice’s energy dissipation design in the downstream of Shanghai Dongfeng Xisha Reservoir,a problem was found in the calculation of sluice’s energy dissipation.Under the condition of constant upstream water level,unchanged unit discharge,and relatively shallow downstream water,when using formula in the design specification for sluice(SL265-2001) to calculate energy dissipation,the calculation result of stilling pool depth became smaller when downstream water level decreased,which presented an evident discrepancy to the actual situation.Therefore,under the careful study of the original formula,the author amended and revised the formula by theoretical calculations,then used it to recalculate.The calculation result was basically close to the actual situation.