倒虹吸进水口水跃分析及处理

Analysis and Treatment of Water Jump in Inverted Siphon Inlet

倒虹吸在小流量运行条件下,由于水头损失小,进水口尾水位高程将会低于上游渠道或进水池水位高程,发生跌水、水跃等不良流态,不利于倒虹吸管道运行。文章针对倒虹进口水跃发生的原理进行分析,得出水跃是由于进口水流不淹没、发生远驱式水跃导致的结果,并据此提出在满足工程安全运行及经济合理性条件下的工程处理措施。

Under the condition of low flow operation,due to slight head loss,the elevation of the tail water level at the inlet is lower than the elevation of the upstream channel or the suction sump water level,and undesirable flow patterns such as hydraulic drop and water jump shall occur,which is unfavorable for the operation of inverted siphon.The article analyzed the water jump principle at the inlet of the inverted siphon and concluded that the water jump is due to unsubmerged water flow at inlet.Based on the analysis,the article proposed economical and feasible engineering treatment measures that meet the safe operation requirement of the project.