基于模型试验的气盾坝流量测算分析  

Analysis of the Calculation of Gas Shield Dams’ Discharge Capacity Based on Model Tests

作　　者：楚万强[1] 王勤香[1] 李欢 CHU Wanqiang;WANG Qingxiang;LI Huan(Yellow River Conservancy Technical Institute,Kaifeng 475004,China)

机构地区：[1]黄河水利职业技术学院,河南开封475004

出　　处：《人民黄河》2021年第9期70-72,共3页Yellow River

基　　金：河南省水利科技攻关计划项目(GG201939);中央高校基本科研业务费专项资金资助重点交叉项目(2021WKZDJC010)。

摘　　要：气盾坝在泄流过程中随开度变化而堰型改变,导致泄流时按单一堰型计算流量的结果与实际差异较大。采用水工模型试验方法对气盾坝泄流进行模拟,并分析其流量系数的相关因素及堰型变化,得到气盾坝不同开度泄流时无侧向收缩自由出流的流量计算公式及流量系数范围,并提出气盾坝不同运行情况下的流量计算方法。根据研究结果,针对典型工程案例开展流量计算分析,结果表明:在工程运行阶段,可方便地测算气盾坝流量;在工程规划设计阶段,根据气盾坝不同开度对应的堰型,可精准计算气盾坝流量。The weir type of gas shield dam changes with the opening transition during the discharge process, which leads to a great difference between the calculated results and the actual results if calculating as per a single weir type. The hydraulic model test was used to simulate the discharge of gas shield dam, and the factors related to flow coefficient and weir type change were analyzed as well. On that basis, the flow calculation formula and the flow coefficient range of free discharge without lateral shrinkage at different openings of gas shield dam were obtained and the flow calculation method under different operating conditions of gas shield dam was put forward. According to the research results, flow calculation and analysis were carried out for typical engineering cases. The results show that it is convenient and practical to calculate the flow rate of gas shield dam during the operation stage of the project;in the stage of engineering planning and design, the flow of gas shield dam can be accurately calculated according to the weir types corresponding to different openings of the gas shield dam.

关 键 词：气盾坝 流量 流量系数 模型试验 

分 类 号：TV649[水利工程—水利水电工程]