摘要
水井湾滩段是长江上游弯道分汊河道,具有急、浅、险等多种碍航特性。洪中枯流量的差异引起主支汊分流比与分沙比的变化,河床不稳定。采用数值模拟方法,结合丁顺坝平面初步布置方案,研究丁顺坝坝头不同偏角布置下水井湾航道的通航水流条件及汊道分流比变化规律,对比分析各布置方案的计算结果得到平面布置最优方案。研究表明:通航水流条件与丁顺坝坝头偏角不成正向变动关系,坝头偏角存在合适区间;分汊主河道分流比与流量成反向变动关系,坝头偏角对河道分流比影响较小。研究结果可为同类型河流航道整治方案提供理论依据。
The Shuijing Bay Beach section is a branching channel in the upper reaches of the Yangtze River,which has various navigational characteristics such as rapid,shallow,and dangerous.The difference in flow during flood and dry season causes changes in the diversion ratio and sediment distribution ratio of the main branch,resulting in unstable riverbed.By using numerical simulation combined with the initial plan for the layout of spur training dike,the navigable flow conditions and the variation laws of the diversion ratio of the inlet channel at different deflection angles of spur training dike head are studied.The calculation results of each layout plan are compared and analyzed to obtain the optimal plan for the layout.The results show that there is no positive relationship between navigation flow conditions and the deviation angle of spur training dike head,and there is a suitable range for the deviation angle of the dam head.The diversion ratio of the branching main channel varies inversely with the flow rate,and the deviation angle of the dam head has little impact on the diversion ratio of the channel.The results of this study can provide theoretical basis for the subsequent waterway regulation schemes of similar rivers.
作者
付旭辉
唐荣岭
何京霖
张波
龚慧玲
FU Xuhui;TANG Rongling;HE Jinglin;ZHANG Bo;GONG Huiling(National Engineering Technology Research Center for Inland Waterway Regulation,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《水运工程》
2024年第5期95-102,155,共9页
Port & Waterway Engineering
基金
重庆市技术创新与应用示范专项重点研发项目(cstc2018jszx-zdyfxmX0021-05)
重庆市教育委员会“成渝地区双城经济圈建设”科技创新项目(KJCXZD2020030)
贵州省交通运输厅科技项目(GZJT2021-221-012)。
关键词
水井湾
丁顺坝
分汊河道
通航水流条件
Shuijing Bay
spur training dike
branching channel
navigable water flow condition
