引江补汉工程段中分层减压控制闸布置与体型研究  

Layout and shape of layered pressure reducing control gate in the middle segment of the Yangtze-to-Hanjiang River Water Diversion Project

作　　者：陈维江 石海峰 李春阳 姜治兵[2] 左丽 任坤杰[2] 杨青远[2] CHEN Weijiang;SHI Haifeng;LI Chunyang;JIANG Zhibing;ZUO Li;REN Kunjie;YANG Qingyuan(China South-to-North Water Diversion Corporation Limited,Beijing 100036,China;Changjiang River Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]中国南水北调集团有限公司,北京100036 [2]长江水利委员会长江科学院,武汉430010

出　　处：《南水北调与水利科技（中英文）》2023年第6期1126-1133,共8页South-to-North Water Transfers and Water Science & Technology

摘　　要：引江补汉工程段中控制方案将控制闸设置在164 km处,以避免局部段内压过高的问题,主要从水动力特性的角度论证洞线总体布置及控制闸布置与体型的合理性。采用一、三维数学模型与物理模型相结合的复合模型开展相关研究:一维水锤数学模型用于闸门启闭过程的全线水力过渡过程分析,通过优化计算,得到相对较优的闸门启闭过程,同时为控制闸段的三维数模与物理模型提供边界条件;三维水气两相流数学模型与物理模型模拟分析闸室与调流池流态与水面波动、中孔溢流面压力分布等水力指标,同时为一维数学模型提供控制闸泄流能力曲线。结果表明:当控制中孔弧形门以先慢后快的三阶段变速率过程开启时,可将全线的最大水锤压力压值在规程允许范围内;中孔溢流面压力分布正常,调流池内水体消能充分,下有压洞进口前沿水面波动较小,未见吸气旋涡等不利流态。引江补汉工程工程采用段中分层减压控制的总体方案是可行的,控制闸布置与体型合理,研究方法可供类似工程参考。The control plan for the segment of the Yangtze-to-Hanjiang River Water Diversion Project will set the control gate at 164 km to avoid the problem of excessive internal pressure in local segments.The rationality of the overall layout of the tunnel line and the layout and shape of the control gate is demonstrated from the perspective of hydrodynamic characteristics.A hybrid model combining a one-dimensional and three-dimensional mathematical model with a physical model was used for relevant research.The one-dimensional water hammer mathematical model is used to analyed the entire hydraulic transition process of the gate opening and closing process.Through optimization calculations,a relatively optimal gate opening and closing process was obtained,while providing boundary conditions for the three-dimensional mathematical and physical models of the control gate segment.A three-dimensional water air two-phase flow mathematical model and a 1:25 scale hydraulic overall physical model are used to simulate and analyze hydraulic indicators such as flow patterns,water surface fluctuations,and pressure distribution on the overflow surface of the gate chamber and regulating pool.At the same time,a control gate discharge capacity curve is provided for a one-dimensional mathematical model.The experimental research results indicate that when the control center hole arc door is opened with a three-stage variable speed process of slow first and then fast,the maximum water hammer pressure value of the entire line can be kept within the allowable range of the regulations;The pressure distribution on the overflow surface of the middle hole is normal,and the energy dissipation of the water in the regulating pool is sufficient.The water surface fluctuation at the inlet front of the lower pressure tunnel is small,and no adverse flow patterns such as suction vortices are observed.The overall plan of adopting segmented layered pressure reduction control in this project is feasible,and the layout and shape of the control gates are reasona

关 键 词：引江补汉 减压控制闸 复合模型 过渡过程 水力特性 

分 类 号：TV68[水利工程—水利水电工程]