【摘要】：為較精確計算不同潰口演變過程下的潰決分洪過程,采用一維非恒定流水動力模型,以泗河白家店潰口為例分別對瞬間潰、縱向漸變潰、橫向漸變潰及縱橫向漸變潰共4種堤防潰決形式進(jìn)行分洪計算。在既定的水文水力條件及潰口演變等假定下,計算結(jié)果表明,瞬間潰形式的潰決洪峰及洪量均為最大;縱橫向漸變潰形式的潰口在縱向及橫向為二維演變,較符合實際潰決演變過程,其潰決洪峰及洪量均為最小;縱向漸變潰與橫向漸變潰形式的潰決流量及水位過程發(fā)展趨勢基本一致。在計算結(jié)果差別不大的情況下,采用瞬間潰形式進(jìn)行分洪計算有利于防洪安全。研究結(jié)果可為分洪計算提供參考。
[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.
【作者單位】： 山東省水利勘測設(shè)計院;
【基金】：水利部公益性行業(yè)科研專項經(jīng)費項目(201501054)
【分類號】：TV122.4

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