摘要
为解决南渠下段岘山片区的排水问题,在岘山片区拟规划设置雨水抽排泵站,应用丹麦水利研究所(DHI)研发的平面二维数学模型MIKE21,根据实测河道地形资料进行网格概化,对渠新增排涝口进行建模,分析工程实施后对河道的壅水及其流速场变化的影响。结果表明:泵站排涝工程的实施,会增加南渠下段过洪量,增大河道行洪压力,影响河道行洪安全;由于泵站箱涵出水口下游有岘山铁路桥,会在桥上游形成阻塞,导致水流宣泄不畅。当南渠发生50年一遇洪峰时,工程实施后,若泵站满负荷抽排12.6 m3/s,工程上游水位壅高最大值为0.11 m,考虑到防洪安全,建议采取工程措施对泵站工程处南渠左岸堤防进行适当加高。
In order to solve the problem of drainage in the Xianshan section of the Nanqu drainage area, a rainwater pumping station is planned to be set up in the Xishan section. The 2D mathematical flow model MIKE21 developed by the Danish Hydraulics Research Institute （DHI）, according to the measured topographic data grid generalization, the model will be built for the new canal drainage port which analyzes the river channel backwater and flow field changes influence after the implementation of the project. The results show that the implementation of pumping station drainage will increase the flood discharge in the lower reaches of the South Drainage River and increase its flood control pressure, affecting the safety of flood discharge in the river course. Due to Xianshan railway bridge in the downstream of the water outlet of the pump station box, a blockage will be formed in the upstream of the bridge which causes the flow of water not smooth. When the flood occurs in the south canal once 50 years, after implementation of the project, if the pumping station drains 12.6 m^3 / s at full capacity and the maximum water level in the upstream of the project is 0.1 lm, taking into account the flood control safety, it is suggested that engineering measures be taken to properly raise the left bank embankment of the Nangqu of the pump station engineering.
出处
《陕西水利》
2018年第1期5-7,共3页
Shaanxi Water Resources
关键词
城市河流
排涝
数学模型
Urban rivers, drainage and the mathematical model
