摘要
近年来南水北调中线总干渠部分输水建筑物出现水位偏高和流态异常现象,存在输水能力下降风险,亟需评估水头损失状况,但存在建筑物内部无监测站点、工程运行尚未达到设计规模、监测数据缺乏校验等问题。采集了总干渠2022年大流量输水期间的水位、流量监测数据,开展第三方水力学原型观测,复核与校正了监测数据。提出一种使用综合水头损失系数的水头损失推算方法,对总干渠158座输水建筑物中具备分析条件的143座,推算了加大流量下的水头损失。结果表明,总干渠输水建筑物分配水头总体有剩余,分布存在明显差异。全线总计剩余水头3.05 m,其中穿黄以南段、穿黄至漳河段和漳河以北段各自剩余0.48、1.06、1.51 m,分别占分配水头的4%、13%、12%。全线有40座输水建筑物的水头损失超过分配值,其中倒虹吸31座、渡槽4座、暗渠4座、隧洞1座。
In recent years,part of water conveyance buildings of the main canal of the middle route of the South-to-North Water Diversion project have high water level and abnormal flow pattern,which lead to the risk of reduced water conveyance capacity.Therefore,it is urgent to assess the head loss.However,there are no monitoring stations inside the buildings,the project operation has not reached the designed scale,and the monitoring data lacks verification.The monitoring data of water level and discharge of the main canal during the large water delivery period in 2022 were collected,and the third-party hydraulic prototype measurement was carried out,and the monitoring data was reviewed and corrected.A calculation method of head loss was put forward using comprehensive head loss coefficient.The head loss of 143 out of 158 water transport structures in the main canal was calculated under enlarged flow.The results show that there is surplus in the distribution of head in the main canal.The total surplus head of the whole line is 3.05 m,among which the surplus in the section south to the Yellow River,the section between the Yellow River and the Zhang River,the section north to the Zhang River are 0.48 m,1.06 m and 1.51 m respectively,accounting for 4%,13% and 12% of the allocated head,respectively.The head loss of 40 water conveyance buildings exceeded the assigned value,among which were 31 inverted siphon,4 aqueduct,4 culvert and 1 tunnel.
作者
卢明龙
崔巍
陈文学
穆祥鹏
熊麒麟
LU Ming-long;CUI Wei;CHEN Wen-xue;MU Xiang-peng;XIONG Qi-lin(China South-to-North Water Diversion Middle Route Cooperation Limited,Beijing 100038,China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China)
出处
《水电能源科学》
北大核心
2023年第10期108-110,76,共4页
Water Resources and Power
基金
国家重点研发计划(2021YFC3200905)
国家自然科学基金项目(U20A20316)。
关键词
水力学
南水北调中线总干渠
输水建筑物
水头损失
原型观测
hydraulics
middle route of South-to-North Water Diversion project
water conveyance building
head loss
prototype measurement
