淮河入江水道大墩岭整治工程效果分析研究
发布时间：2019-01-03 14:21
【摘要】：淮河入江水道是黄河夺淮的产物,全长157.2公里；其中上段自三河闸至金湖改道段高邮湖入口,全长57.8公里,金湖段长31公里。自入江水道建成以来随着年限的增加,行洪能力减小,根据近10多年行洪实况来看,入江水道行洪能力达不到原设计标准,出现了“中流量、高水位、大防汛”的严峻状况。究其原因,与入江水道内障碍物分布现状有直接关系,障碍物缩窄了行洪通道,阻碍行洪速度,延长洪水持续时间,给防汛工作带来了很大的影响。为了充分发挥入江水道的泄洪功能,必须对入江水道内行洪障碍进行综合治理。本文通过物理模型试验对金湖段大墩岭整治前、后几种工况下的水位、流态试验数据进行了对比分析,以确定整治效果。并利用Fluent软件对上述整治后物理模型各种工况进行了数值模拟计算,并将计算结果与物理模型计算结果进行了对比。研究的主要结论如下：1、中小流量(2000m3/s、4000m3/s、6000m3/s)工况下大墩岭整治效果明显；大流量(8000m3/s、1000m3/s、12000m3/s)工况下整治前后大墩岭水位几乎没有变化,大墩岭出现局部雍水现象。2、整治前大墩岭下游滩地的漫滩流量约为500m3/s,整治后大墩岭下游的滩地漫滩流量约为1500m3/s,大墩岭下游滩地的漫滩流量增加了1000m3/s左右。整治前大墩岭下游滩地漫滩时东、西漫水闸的差值大约0.56m,整治后大墩岭下游滩地漫滩时东、西漫水闸的差值大约0.16m,整治工程对大墩岭下游滩地水流漫滩同步性有很大的改善。3、整治后大墩岭的边界变小,大墩岭下游与改道段间漩涡区面积变小,大墩岭周边流态得到了改善,整治效果明显。4、利用Fluent软件,对整治后流量工况2000m3/s、4000m3/s、6000m3/s、8000m3/s、 1000m3/s、12000m3/s时大墩岭附近流场进行了数值模拟计算,数值模型计算结果与物理模型计算结果基本一致。随着流量的增大位于大墩岭下游与东西漫水闸之间的回流区,在河道的横向方向上对应的宽度变小,流速分布更加均匀。
[Abstract]:The Huaihe River channel is the product of Huanghe River, with a total length of 157.2 km, in which the upper section from Sanhe Gate to Jinhu diversion section of Gaoyou Lake entrance is 57.8 km in length and 31 km in length. Since the completion of the waterway into the river, with the increase of the number of years, the flood discharge capacity has decreased. According to the fact of flood discharge over the past 10 years, the flood discharge capacity of the waterway into the river has not reached the original design standard, resulting in a severe situation of "medium discharge, high water level and great flood control". The reason is directly related to the distribution of obstacles in the river channel, which narrows the flood passage, obstructs the flood discharge speed, prolongs the duration of the flood, and has a great impact on flood control work. In order to give full play to the flood discharge function of the waterway into the river, it is necessary to comprehensively treat the flood discharge obstacles in the waterway. In this paper, the experimental data of water level and flow state before and after the regulation of Dadun Ridge in Jinhu reach are compared and analyzed by physical model test, in order to determine the effect of regulation. The numerical simulation of the physical model was carried out by using Fluent software, and the results were compared with those of the physical model. The main conclusions of the study are as follows: 1. Under the condition of small and medium flow rate (2000m3 / s) (2000m3s / s4000m3s), the effect of Dudunling regulation is obvious; Under the condition of large discharge (8000m3 / s1000m3 / s-1 2000m3s), the water level of Dadun Ridge hardly changed before and after the renovation, and the local Yongshui phenomenon appeared in Dadunling. 2. Before the regulation, the flood rate of the beach in the lower reaches of Dadun Ridge was about 500m3 / s. The floodplain discharge in the lower reaches of Dadun Ridge is about 1500m3 / s after regulation, and the 1000m3/s is increased in the floodplain of Dadunling lower reaches. The difference between the floodplain in the lower reaches of Dadun Ridge before regulation and the floodplain in the lower reaches of Dadun Ridge is about 0.56 m, and that in the floodplain in the lower reaches of Dadun Ridge after the regulation is about 0.16 m. After regulation, the boundary of Dadun Ridge becomes smaller, the area of vortex area between Dadun Ridge and the diversion section becomes smaller, and the flow pattern around Dadun Ridge is improved. The effect of regulation is obvious. 4. Using Fluent software, the flow field near Dadun Ridge is numerically simulated when the flow rate is 2000m3 / s4000m3 / s0 / 6 000m3 / s, 1000m3 / s / s 12000m3 / s, respectively. The result of numerical model is basically consistent with that of physical model. With the increase of the flow rate, the width corresponding to the transverse direction of the channel becomes smaller and the velocity distribution is more uniform, which is located in the backflow zone between the lower Dadun Ridge and the east-west overflow sluice.
【学位授予单位】：扬州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TV85
本文编号：2399498
[Abstract]:The Huaihe River channel is the product of Huanghe River, with a total length of 157.2 km, in which the upper section from Sanhe Gate to Jinhu diversion section of Gaoyou Lake entrance is 57.8 km in length and 31 km in length. Since the completion of the waterway into the river, with the increase of the number of years, the flood discharge capacity has decreased. According to the fact of flood discharge over the past 10 years, the flood discharge capacity of the waterway into the river has not reached the original design standard, resulting in a severe situation of "medium discharge, high water level and great flood control". The reason is directly related to the distribution of obstacles in the river channel, which narrows the flood passage, obstructs the flood discharge speed, prolongs the duration of the flood, and has a great impact on flood control work. In order to give full play to the flood discharge function of the waterway into the river, it is necessary to comprehensively treat the flood discharge obstacles in the waterway. In this paper, the experimental data of water level and flow state before and after the regulation of Dadun Ridge in Jinhu reach are compared and analyzed by physical model test, in order to determine the effect of regulation. The numerical simulation of the physical model was carried out by using Fluent software, and the results were compared with those of the physical model. The main conclusions of the study are as follows: 1. Under the condition of small and medium flow rate (2000m3 / s) (2000m3s / s4000m3s), the effect of Dudunling regulation is obvious; Under the condition of large discharge (8000m3 / s1000m3 / s-1 2000m3s), the water level of Dadun Ridge hardly changed before and after the renovation, and the local Yongshui phenomenon appeared in Dadunling. 2. Before the regulation, the flood rate of the beach in the lower reaches of Dadun Ridge was about 500m3 / s. The floodplain discharge in the lower reaches of Dadun Ridge is about 1500m3 / s after regulation, and the 1000m3/s is increased in the floodplain of Dadunling lower reaches. The difference between the floodplain in the lower reaches of Dadun Ridge before regulation and the floodplain in the lower reaches of Dadun Ridge is about 0.56 m, and that in the floodplain in the lower reaches of Dadun Ridge after the regulation is about 0.16 m. After regulation, the boundary of Dadun Ridge becomes smaller, the area of vortex area between Dadun Ridge and the diversion section becomes smaller, and the flow pattern around Dadun Ridge is improved. The effect of regulation is obvious. 4. Using Fluent software, the flow field near Dadun Ridge is numerically simulated when the flow rate is 2000m3 / s4000m3 / s0 / 6 000m3 / s, 1000m3 / s / s 12000m3 / s, respectively. The result of numerical model is basically consistent with that of physical model. With the increase of the flow rate, the width corresponding to the transverse direction of the channel becomes smaller and the velocity distribution is more uniform, which is located in the backflow zone between the lower Dadun Ridge and the east-west overflow sluice.
【学位授予单位】：扬州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TV85
【参考文献】
相关期刊论文 前10条
1 董小雨;王玲玲;唐洪武;胡孜军;曾诚;;淮河入江水道水动力数值模拟研究[J];人民长江;2015年03期
2 钟开伟,邹燕;淮河入江水道金湖段阻洪障碍及对策[J];江苏水利;2004年09期
3 张锦家;淮河入江水道工程存在的防洪问题及对策[J];治淮;2004年08期
4 周宜林,道上正规,桧谷治;非淹没丁坝附近三维水流运动特性的研究[J];水利学报;2004年08期
5 陈长英,张幸农;滩槽复式断面水流特性的试验研究[J];水利水运工程学报;2004年03期
6 朱新元,许唯临,张永丽;天然复式河道的流量计算[J];四川大学学报(工程科学版);2004年02期
7 宿晓辉,张建新,李志伟,陈璧宏;带有植物的河道水流浅水紊流运动大涡模拟[J];大连理工大学学报;2003年02期
8 周宜林;淹没丁坝附近三维水流运动大涡数值模拟[J];长江科学院院报;2001年05期
9 罗伯明;淮河入江水道现状及防洪对策[J];江苏水利;1999年03期
10 周宜林;滩槽水流流速横向分布的研究[J];武汉水利电力大学学报;1994年06期
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