平原地区大型输水渠道多孔倒虹吸工程设计研究  

The Design and Research on Multi-hole Inverted Siphon Project of a Large-scale Water Transmission Channel in Plain Areas

作　　者：巩维屏 李美玲 张石磊 GONG Wei-ping;LI Mei-ling;ZHANG Shi-lei(Inner Mongolia Yinchuo Jiliao Water Supply Co.,Ltd,Wulanhaote 137400,China)

机构地区：[1]内蒙古引绰济辽供水有限责任公司,内蒙古乌兰浩特137400

出　　处：《中国农村水利水电》2021年第9期189-193,共5页China Rural Water and Hydropower

摘　　要：多孔倒虹吸工程具有流量适应范围宽、调度灵活等优势,但闸孔调度过程中各孔间流量分配不均时将影响过流能力及流态,甚至出现因进口水位波动大而诱发结构振动。以某平原地区输水管道三孔倒虹吸工程设计研究为例,分析了多孔调度运行条件下进出口流态及水位波动特征,提出了调整进口流态及降低水位波动的优化措施,并探讨了糙率变化、下游渠末节制闸紧急关闭等因素对倒虹吸工程运行的影响。研究成果可为类似工程提供参考。The multi-hole inverted siphon project has the advantages of the large flow rate accommodation and flexible scheduling.However,the non-uniform flow distribution among the holes directly affects the flow capacity and the flow regime,and even the large water level fluctu⁃ations,which can induce engineering vibration.Taking a three-hole inverted siphon project of a water transmission pipeline in a plain area as an example,this paper emphatically analyzes the distribution of the flow regime in inlet and outlet and the characteristics of water level fluctuation under the condition of multi-hole scheduling operation.The optimization plans are proposed to adjust the flow regime in the inlet and reduce the water level fluctuation.The influence of the emergency closing of the valve and the variation of roughness on the operation of inverted siphon project is discussed.The results can provide a reference for similar projects.

关 键 词：多孔倒虹吸 流量分配 水位波动 糙率变化 

分 类 号：TV672.5[水利工程—水利水电工程]