考虑混凝土坝溃决过程的溃口流量过程线分析

发布时间：2018-01-26 03:22

本文关键词： 溃口流量过程线混凝土坝水动力分析计算方法　出处：《水电能源科学》2017年03期 　论文类型：期刊论文

【摘要】：为获得较合理的溃口流量过程线,从混凝土坝溃决的基本特点出发,假定其溃决过程为以坝基中心线为轴,坝体整体向后倾倒。对该溃决方式进行水动力分析,得到混凝土坝倾倒过程的溃口流量计算公式,并以此计算公式结合概化典型流量过程线法得到了新的溃口流量计算方法。以某工程为例,得出该计算方法与经典的混凝土坝瞬溃计算方法所得溃口流量过程线整体一致,但开始阶段更符合实际情况。新的溃口流量计算方法可为类似工程的大坝溃口流量分析提供参考。
[Abstract]:In order to obtain a reasonable flow process line of breakers, starting from the basic characteristics of concrete dam collapses, the collapse process is assumed to be the dam foundation centerline as the axis, the dam body is poured backward, and the hydrodynamic analysis is carried out. In this paper, the calculation formula of the burst discharge in the process of concrete dam toppling is obtained, and a new method is obtained by combining the formula with the line method of the typical flow process. Taking an engineering as an example, a new method for calculating the discharge of the burst is obtained. It is concluded that the calculation method is consistent with that obtained by the classical method of transient collapse calculation of concrete dam. But the initial stage is more in line with the actual situation. The new method of calculating the burst flow can be used as a reference for the analysis of dam burst flow in similar projects.
【作者单位】：三峡大学水利与环境学院;
【基金】：水利部公益性行业科研专项项目(201401027)
【分类号】：TV122.4
【正文快照】： 1引言溃坝洪水作为一类典型的洪水灾害,给人们的生命和财产造成巨大损失,研究溃坝洪水的演进过程具有十分重要的意义[1]。溃口流量过程线作为溃坝洪水波演进模拟的上游入流边界条件,其精确程度直接影响到下游洪水波演进模拟的准确性[2]。对于混凝土坝溃口流量过程线,一般由概

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