京杭运河边滩取水口工程水流特性研究
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摘要
边滩取水口的建设改变了原来河道的平面尺寸和断面尺寸,对取水口附近的河道水流产生一定程度的影响,进而对航道通航安全以及河道行洪能力产生一定的影响。结合宿迁市河湖连通工程——应急水源地取水口工程建设实例,应用数学模拟技术,分析边滩取水口的建设对航道水流特性的影响,结论表明:拟建边滩取水口的布置不会在取水口前沿航道水域产生不良流态,取水口建成后局部航道的横向流速有小幅增加,但对航道通航条件的影响不大,此外取水口采用开挖河滩加抛石护底的工程方案,增加了河道的断面尺寸,有利于河道行洪。
The construction of the water intake at the side beach changed the plane size and section size of the original river, which had a certain influence on the river flow near the water intake, and then had a certain influence on the navigation safety of the channel and the flood capacity of the river. Combined with the construction example of Suqian river lake connected project-emergency water source water intake project construction, the mathematical simulation technology was applied to analyze the influence of the construction of the water intake on the waterway flow characteristics. The conclusion showed that the layout of the proposed water intake at the side beach would not produce bad fluency in the water area of the cutting edge of the water intake, and the transverse velocity of the local channel increases slightly after the completion of the intake port, but it had little effect on the navigation conditions of the channel. In addition, the water intake adopts the engineering scheme of excavating the river beach and dumped rocks protecting foundation,which increased the section size of the river channel, which was beneficial to river course flood passing.
The construction of the water intake at the side beach changed the plane size and section size of the original river, which had a certain influence on the river flow near the water intake, and then had a certain influence on the navigation safety of the channel and the flood capacity of the river. Combined with the construction example of Suqian river lake connected project-emergency water source water intake project construction, the mathematical simulation technology was applied to analyze the influence of the construction of the water intake on the waterway flow characteristics. The conclusion showed that the layout of the proposed water intake at the side beach would not produce bad fluency in the water area of the cutting edge of the water intake, and the transverse velocity of the local channel increases slightly after the completion of the intake port, but it had little effect on the navigation conditions of the channel. In addition, the water intake adopts the engineering scheme of excavating the river beach and dumped rocks protecting foundation,which increased the section size of the river channel, which was beneficial to river course flood passing.
引文
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[4]张丽.弯道水流二维数值模拟及岸线整治的水动力分析方法研究[J].水道港口,2012,33(2):136-141.
[5]唐金芝.河流横比降试验及改正方法[J].湖南水利,1994(6)22-24.
[6]唐宏涛,吴伟.河流育道水流特点与冲刷深底探讨[J].浙江水利科技,2004(1):7-9.
[7]宋志尧.计算弯道环流的通用公式[J].泥沙研究,2003,8(4):19-23.
[8]张丽萍,杨达源,朱大奎.长江渝宜河段深槽分布特征及成因[J].南京大学学报(自然学版),2001,37(3):311-316.