摘要
感潮河段支流口门受潮汐作用影响,在落潮高强度引水时,由于枢纽建筑物局部断面突变,产生多种不良流态,严重影响闸门过流能力。以新孟河界牌枢纽为例,开展局部水流条件物理模型优化试验,提出不同隔流墙长度和不同导流墩形式的整治措施方案。结果表明,延长隔流墙仅使遮闭区回流位置提前,回流长度有所增加,对入闸流态无明显效果;导流墩平行布置可使各墩所处流带不重叠且较好衔接,整流效果较好,同时内侧左边墩延长10 m方案的流速分布更加均匀。
The tributary entrance of tidal reach is affected by the tidal action.Due to abrupt change of the local junction building section,a variety of adverse flow patterns are produced during high-intensity water diversion at low tide,which seriously decreases the flow capacity of the lock gate.Taking the Jiepai Junction of the Xinmeng River as an example,we carry out the physical model optimization experiment of local flow condition,and propose the scheme of regulation measures of the different barrier wall lengths and diversion pie forms.The results show that the extension of the barrier wall can only advance the backflow position and increase the backflow length,but it has no obvious effect on the flow pattern of entering the lock.The parallel arrangement of the diversion pier can make the flow zones of each pier non-overlapping and connect well.The scheme of 10 m extending of the inner left pier leads to a more uniform flow velocity distribution.
作者
朱明成
苏福
滕娟
朱昊
李寿千
ZHU Ming-cheng;SU Fu;TENG Juan;ZHU Hao;LI Shou-qian(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Science,Nanjing Hydraulic Research Institute,Nanjing 210029,China;CCCC Guangzhou Dredging Co.,Ltd.,Guangzhou 510640,China;Yangzhou Water Conservancy Construction Center,Yangzhou 225001,China;Jiangsu Provincial Hydraulic Research Institute,Nanjing 210017,China)
出处
《水运工程》
北大核心
2021年第6期110-114,共5页
Port & Waterway Engineering
基金
国家重点研发计划资助项目(2017YFC1404200)
长江航道局科技创新项目(Hs219003)
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(Y218003)。
关键词
感潮河段
口门区
水流条件
物理模型试验
tidal river
entrance area
flow condition
physical model experiment
