基于MIKE FLOOD的城区溃坝洪水模拟研究

发布时间：2018-06-14 06:05

本文选题：溃坝洪水 + MIKE　；参考：《水利水运工程学报》2017年05期

【摘要】：大坝安全不仅影响工程效益,还影响人民的生命和财产安全,溃坝洪水模拟可以对水库大坝的失事影响做出评估,对制定应急预案和防洪减灾具有重要意义。以深圳市龙华新区民治水库及下游片区为研究对象,基于MIKE FLOOD将MIKE11模型和MIKE21模型进行动态耦合,对溃坝洪水在下游的演进过程进行仿真模拟。模型采用瞬间溃(瞬间部分溃和瞬间全溃)以及逐渐溃两种溃决方式,分别模拟4种工况下的溃口流量过程线以及下游洪水演进过程。结果表明:瞬间溃的洪峰流量较大,出现在溃坝开始时刻,而逐渐溃的洪峰流量相对较小,出现在渗透破坏变形发展至上部坝体坍塌时刻,之后均随库区水位逐渐降低,下泄流量变小,直至库区水体排空。溃坝洪水对上游地区横岭村附近破坏较大,淹没水深较深。民治河中游段居民和商业区附近洪水流速接近5 m/s,对建筑物有一定破坏力,左侧向南村地势较低,淹没情况最为严重,并且在洪水消退后仍有3 m左右积水。民治河下游地区在洪水消退后也有少量积水。
[Abstract]:The dam safety not only affects the engineering benefit, but also affects the people's life and property safety. The dam break flood simulation can evaluate the impact of the dam's failure. It is of great significance to the formulation of the emergency plan and the flood control and disaster reduction. The research object is the Shenzhen Longhua NEW District, the Ming Dynasty reservoir and the downstream area, and the MIKE11 model based on the MIKE. The dynamic coupling with the MIKE21 model is used to simulate the evolution process of the dam break flood in the lower reaches. The model adopts the instantaneous break (instantaneous partial collapse and instantaneous collapse) and the gradual collapse of two kinds of collapsing modes. The flow process line and the downstream flood evolution process are simulated respectively under 4 operating conditions. The results show that the instantaneous burst flow is more than the flood peak flow. It appears at the beginning of the dam break, and the gradual collapse of the flood peak flow is relatively small, which occurs in the seepage failure deformation to the upper dam collapse time, and then gradually decreases with the water level of the reservoir area, and the discharge flow becomes smaller until the reservoir area is emptied. The flood flow near the middle reaches of the middle reaches of the commercial area is close to 5 m/s, which has a certain destructive force to the building, the left to the South Village is lower and the flood is most serious, and there is still about 3 m of water after the flood retreat.
【作者单位】：华南理工大学土木与交通学院;华南理工大学亚热带建筑科学国家重点实验室;
【基金】：广东省科技计划项目(2016A020223003) 广东省水利科技创新项目(2016-32)
【分类号】：TV122.4

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