不同溃口演变过程下的溃决分洪计算
发布时间：2018-09-01 15:01
【摘要】：为较精确计算不同溃口演变过程下的溃决分洪过程,采用一维非恒定流水动力模型,以泗河白家店溃口为例分别对瞬间溃、纵向渐变溃、横向渐变溃及纵横向渐变溃共4种堤防溃决形式进行分洪计算。在既定的水文水力条件及溃口演变等假定下,计算结果表明,瞬间溃形式的溃决洪峰及洪量均为最大;纵横向渐变溃形式的溃口在纵向及横向为二维演变,较符合实际溃决演变过程,其溃决洪峰及洪量均为最小;纵向渐变溃与横向渐变溃形式的溃决流量及水位过程发展趋势基本一致。在计算结果差别不大的情况下,采用瞬间溃形式进行分洪计算有利于防洪安全。研究结果可为分洪计算提供参考。
[Abstract]:In order to accurately calculate the process of breaking and diverting flood under the different evolution process of the burst, the one-dimensional unsteady flow dynamic model is adopted, and the transient collapse and longitudinal gradual collapse of Sihe Baijiadian are taken as an example, respectively. There are four kinds of embankment collapsing in transverse and horizontal direction for flood diversion calculation. Under the assumption of hydro-hydraulic conditions and the evolution of breakers, the calculation results show that the instantaneous collapse of Hong Feng and the flood volume are the largest, and the longitudinal and horizontal collapses are two-dimensional, In accordance with the actual collapse evolution process, both Hong Feng and flood volume are the smallest, and the trend of the collapsing discharge and water level process of the longitudinal gradual collapse is basically consistent with that of the transverse gradual collapse. In the case of little difference in calculation results, flood diversion calculation by instantaneous collapse is beneficial to flood control safety. The results can provide reference for flood diversion calculation.
【作者单位】： 山东省水利勘测设计院;
【基金】：水利部公益性行业科研专项经费项目(201501054)
【分类号】：TV122.4
[Abstract]:In order to accurately calculate the process of breaking and diverting flood under the different evolution process of the burst, the one-dimensional unsteady flow dynamic model is adopted, and the transient collapse and longitudinal gradual collapse of Sihe Baijiadian are taken as an example, respectively. There are four kinds of embankment collapsing in transverse and horizontal direction for flood diversion calculation. Under the assumption of hydro-hydraulic conditions and the evolution of breakers, the calculation results show that the instantaneous collapse of Hong Feng and the flood volume are the largest, and the longitudinal and horizontal collapses are two-dimensional, In accordance with the actual collapse evolution process, both Hong Feng and flood volume are the smallest, and the trend of the collapsing discharge and water level process of the longitudinal gradual collapse is basically consistent with that of the transverse gradual collapse. In the case of little difference in calculation results, flood diversion calculation by instantaneous collapse is beneficial to flood control safety. The results can provide reference for flood diversion calculation.
【作者单位】： 山东省水利勘测设计院;
【基金】：水利部公益性行业科研专项经费项目(201501054)
【分类号】：TV122.4
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