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为了解不同因素对于堰塞坝漫顶溃坝过程的影响,该文针对入流流量、坝体坡度、坝顶长度和坝顶高度4个主要影响参数进行了9组对比试验,研究了4个参数对溃坝冲刷过程、洪峰流量和峰现时间的影响。结果表明:入流流量和坝顶高度对泄流过程影响较大且与洪峰流量成正相关关系,但坝顶高度的增加会导致峰现时间的延后;减小坝坡度和增加坝顶宽度都能减小冲刷速率从而起到加固坝体的作用,同时可以降低洪峰流量并延长峰现时间。基于对试验结果的分析建立了漫顶溃坝洪水预测模型,并对9组试验进行了模拟计算,对比结果表明本模型具有较好的精度。
In order to understand the influence of different factors on the process of dam-break dam, this paper conducted a comparative study on four main influence parameters of inflow, dam slope, crest length and crest height, and studied four parameters The impact of dam erosion process, peak flow and peak time. The results show that the inflow and the height of the dam have a great influence on the discharge process and have a positive correlation with the flood peak discharge. However, the increase of the height of the dam will result in the delay of the peak time. Both the dam slope and the width of the dam can be reduced Reduce the rate of erosion to play a role in strengthening the dam, while reducing peak flow and extend peak time. Based on the analysis of test results, flood forecasting model of flood control dam breakup was established, and nine groups of tests were simulated. The comparison results show that this model has better accuracy.