深隧输水管道水力过渡过程敏感性分析及参数优化初探  

Sensitivity Analysis and Parameter Optimization of Hydraulic Transition Process of Deep Tunnel Water Pipeline

作　　者：周荻莎 冯艳 许听雨 薛万云 周杰 ZHOU Di-sha;FENG Yan;XU Ting-yu;XUE Wan-yun;ZHOU Jie(Shenzhen Smart Water Affairs Comprehensive Command and Dispatch Guarantee Center,Shenzhen 518048,China;PowerChina Zhongnan Engineering Corporation Limited,Changsha 410014,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]深圳市智慧水务综合指挥调度和保障中心,广东深圳518048 [2]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014 [3]水利部交通运输部国家能源局南京水利科学研究院,江苏南京210029

出　　处：《水电能源科学》2024年第12期106-110,共5页Water Resources and Power

基　　金：南京水利科学研究院中央级公益性科研院所基本科研业务费专项资金项目(Y124009)。

摘　　要：基于一维有压管道的非恒定流基本理论,建立了“水库+竖井+输水隧洞+泵站+稳压池”复杂系统的水力过渡过程数学模型,研究了泵站位置、深隧洞管径、隧洞中部竖井、泵数量对水力过渡过程的影响。结果表明,泵房后置可以降低沿程压力,水位波动较小,有利于水锤防护并降低管理难度;增大输水管道的管径对水锤影响较小,但能降低沿程水头损失,有效降低事故停泵时上游竖井的涌浪高度,增加系统运行安全性;将中部竖井设计为调压井能够降低事故停泵时上游竖井的涌浪水位,但在启泵时会增加上游竖井的涌浪水位。取水泵房工程中,泵启停等工况条件引起的水位变幅不大的前提下,建议选择泵多的方案。该研究能够为长距离深隧输水管道系统的工程布置提供科学依据。Based on the basic theory of unsteady flow in the pressurized pipeline,a one-dimensional mathematical model of the hydraulic transition process of the complex system"reservoir-shaft-water delivery tunnel-pumping station-pressure stabilizer tank"was established.The impacts of pumped station location,deep tunnel diameter,shaft in the middle of the tunnel,and pump number on the hydraulic transition process were studied.The results show that the back position of the pump house can reduce the pressure along the way,and the water level fluctuationis small,which is con-ducive to protecting the water hammer and reducing the difficulty of management.Increasing the diameter of the water pipeline has little effect on the water hammer,but it can reduce the head loss along the way,effectively reduce the surge height of the upstream shaft when the pump is stopped accidentally,and increase the safety of the system operation.The design of the middle shaft as a surge well can reduce the surge level of the upper shaft in the event of an emergency pum-ping shutdown,but will increase the surge level of the upper shaft when the pump is started.In the project of water in-take pumping stations,it is recommended to choose the scheme with more pumps under the premise that the water level fluctuation caused by the pump's accident stop is not large.The research can provide a scientific basis for the engineering layout of the long-distance deep tunnel water pipeline system.

关 键 词：深隧输水管道 水力过渡过程 敏感性分析 参数优化 

分 类 号：TV672.2[水利工程—水利水电工程]