输水渠隧系统典型事故工况水力响应初探——以犬木塘工程为例  

Study on Hydraulic Response of Canal and Tunnel System Under Accident Condition——A Case Study of Quanmutang Project

作　　者：王乾坤 翟文琳 管光华[1] 易放辉 杨家亮 黄跃群 WANG Qian-kun;ZAI Wen-lin;GUAN Guang-hua;YI Fang-hui;YANG Jia-liang;HUANG Yue-qun(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;Institute of Rural Electrification,Ministry of Water Resources,Hangzhou 310012,China;Hunan Xiangshui Group Co.,Ltd,Changsha 410004,China;Hunan Water Resources and Hydropower Survey,Design,Planning and Research Co.,Ltd,Changsha 410007,China;Hunan Water Resources Development and Investment Co.,Ltd,Changsha 410007,China)

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [2]水利部农村电气化研究所,杭州310012 [3]湖南省湘水集团有限公司,长沙410004 [4]湖南省水利水电勘测设计规划研究总院有限公司,长沙410007 [5]湖南省水利发展投资有限公司,长沙410007

出　　处：《节水灌溉》2024年第12期87-94,共8页Water Saving Irrigation

基　　金：犬木塘水库工程长藤结瓜灌溉水网系统水资源调配关键技术研究与应用。

摘　　要：在输水建筑物运行中,及时发现和预警渠隧系统中的异常数据以及其相应的事故工况可以为渠隧系统的安全运行提供重要保障。研究目的在于探索出输水渠隧系统在典型事故工况下的水力响应特征,为灌区管理人员提供事故水力响应特征。基于HEC-RAS软件针对渠隧系统常见的事故工况提出了概化模型,并根据其水力响应特征检验了其有效性。研究表明:①洪水入渠事故发生时,会出现上下游水位上升,上游流量先下降后稳定到原流量的趋势,其中最大漫溢水头为0.14 m。②结构破坏事故发生时,渠道上、下游水位以及下游流量逐步下降,上游流量先上升后下降至原流量的趋势,其中最大泄漏流量为9.95 m^(3)/s。③隧洞局部垮塌事故发生时,渠道上游水位雍高,上游流量,下游水位以及流量均呈现先下降再逐渐恢复至原水位流量的趋势,其中最大雍高水位为0.460 m。该事故概化模型能够较好地反应事故工况下的输水建筑物动态变化情况。本研究得出的水力响应特性可为事故应急预案的制定及应急调度提供借鉴和参考,对发展长距离输水建筑物安全化建设具有一定的推进意义。In the operation of water transport buildings,timely detection and early warning of abnormal data and corresponding accident conditions can provide an important guarantee for the safe operation of canal and tunnel system.The purpose of this paper is to explore the hydraulic response characteristics of the canal and tunnel system under typical accident conditions,so as to provide the accident hydraulic response characteristics for the managers of the irrigation district.In this paper,based on HEC-RAS software,a generalized model is proposed for the common accident conditions of canal and tunnel system,and its effectiveness is tested according to its hydraulic response characteristics.The research shows that:①When the flood enters the channel,the upstream and downstream water levels will rise,and the upstream flow will first decline and then stabilize to the original flow,with a maximum overflow head is 0.14 m.②When the structural damage accident occurs,the upstream and downstream water levels and downstream flow of the channel will gradually decline.The upstream flow increases first and then decreases to the original flow,and the maximum leakage flow is 9.95 m^(3)/s.③When the local collapse accident of the tunnel occurs,the water level of the upstream channel is high.The upstream flow,downstream water level and flow showed a trend of first decreasing and then gradually recovering to the original water level flow,and the maximum water level was 0.460 m.The generalized accident model can effectively reflect the dynamic change of water transport structures under accident conditions.The hydraulic response characteristics obtained in this study can provide reference for the formulation of accident emergency plan and emergency dispatch,and has significance implications for the development of safety measures in the construction of long-distance water transport systems.

关 键 词：输水系统 渠隧事故 水力响应 事故识别 HEC-RAS 

分 类 号：S274.3[农业科学—农业水土工程]