南水北调中线京石段闸门间歇关闭水力响应特性  

Hydraulic response of synchronous and intermittent closing of gates on Beijing-Shijiazhuang section in the Middle Route of the South-to-North Water Transfers Project

作　　者：雷毓灵 崔巍[1] 王磊 丁志楠 穆祥鹏[1] 陈文学[1] LEI Yuling;CUI Wei;WANG Lei;DING Zhinan;MU Xiangpeng;CHEN Wenxue(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basins,China Institute of Water Resources and Hydropower Research,Beijing 100038‚China)

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038

出　　处：《南水北调与水利科技（中英文）》2024年第3期427-435,共9页South-to-North Water Transfers and Water Science & Technology

基　　金：国家重点研发计划项目(2021YFC3200905);国家自然科学基金项目(U20A20316)。

摘　　要：为减小闸门关闭引发的水位壅高,以南水北调中线工程京石段磁河闸至沙河北闸之间的渠池为研究对象,构建一维明渠非恒定渐变流仿真模型,比较分次间歇关闸与一次连续关闸,以及不同闸门间歇方案对闸前壅水峰值、水力振荡稳定时间的影响。研究表明:分次间歇关闸可带来更低的闸前壅水水位和更短的水力振荡稳定时间;设置1次间歇相较于多次间歇可减小闸前壅水峰值,将间歇开始时刻设置在上游降水波即将传播至闸前的时刻、设置间歇时长略小于关闸总时间的1/2均可有效降低闸前壅水峰值,缩短稳定时间。闸门分次间歇关闭水力响应特性与水波运动规律紧密关联,合理设置间歇有助于在应急调控阶段减少事故造成的影响。The Middle Route of the South-to-North Water Transfers Project was structured with interconnected canal pools,divided by regulating gates.During emergency situations,the synchronous operation approach was commonly adopted to shift the channel's operation from a normal water level regime to an equal-volume operation by simultaneously closing gates.This swift change in channel flow dynamics due to the abrupt hydraulic transition proved highly effective in emergency management.However,research efforts at that time focused solely on continuous gate closures,neglecting the study of hydraulic response characteristics stemming from sequential intermittent gate closures in small steps.Exploring these responses was anticipated to provide guidance for emergency gate closure strategies to effectively prevent water levels from surpassing safety thresholds.Building on the synchronization principle,the study targeted the canal pools between the Cihe gate and the Shahebei gate within the Beijing-Shijiazhuang section of the Middle Route Project.Employing the Saint-Venant equations,a one-dimensional simulation model was constructed to simulate non-uniform transient flow in open channels.This model compared the hydraulic response characteristics between sequential intermittent gate closures and continuous closures,and it simulated various hydraulic responses under different intermittent closure patterns.The analysis aimed to assess the impacts of different closure initiation times,the frequency of closures,and the duration of closures on the peak water levels upstream of the gates and the duration of hydraulic oscillations.Simulation outcomes demonstrated that,with an equal total closure time,sequential intermittent gate closures considerably reduced peak water levels and hydraulic oscillation amplitudes compared to continuous closures.These closures substantially shortened the time required for stability,allowing the canal pools to rapidly regain stability.Peak water levels upstream of the gates initially declined and then increa

关 键 词：明渠水力学 南水北调中线工程 闸门分次间歇关闭 水力振荡 应急调度 

分 类 号：TV133.2[水利工程—水力学及河流动力学]