高淹没度开敞式水闸孔径计算公式探讨

Discussion of the Computational Formula for the Gate Size of Open Sluice with High Submergence Degree

通过实际计算分析说明,对于高淹没度的开敞式水闸,《水闸设计规范》SL 265-2001中公式(A.0.1-1)的计算成果不合理,按该公式计算的闸孔宽度偏小,过流能力偏大。提出当淹没度hs/H0为0.90～0.95时,宜按该规范中的公式(A.0.2-1)计算;当淹没度hs/H0>0.95时,不是如该规范所说"也可按"而是应该按公式(A.0.2-1)计算,否则,将会出现设计采用的闸孔宽度偏小及上游实际壅高水深将增大的情况。

For the open sluice with a high submergence degree, the equation of （A. 0. 1-1） in the Design Specification for Sluice （SL265-2001） results in the unreasonable results. Based on the formula, the calculated gate width is small and the calculatedconveyance capacity is too large. It is suggested that the equation of （A. 0. 2-1） is better applied when the submergence degree, h,/Ho,is in the range of 0. 90 to 0. 95. When the submergence degree, hs/Ho, is higher than 0. 95, the equation （A. 0. 2-1） should be used. Otherwise, the calculations of the designed gate widths are relatively small and the actual upstream banked-up water depths are high if other equations are used.