水利水电技术2017，Vol.48Issue(9)：126-131,6.DOI:10.13928/j.cnki.wrahe.2017.09.019
渠道墩柱断面过冰能力研究
Study on ice-passing capacity of pier-column section in channel
摘要
Abstract
In order to avoid drift-ice to stagnate,jam and pile up at the sections contracted by bridge pier,gate pier,etc.in channel,the ice-passing capacities of pier-column section under different hydraulic conditions,ice-block sizes and ice amounts are studied herein through the relevant physical model experiment.The study result shows that the ice-passing capacity is in di rect proportion to the Froude number,i.e.ice-block is prone to jam in front of the pier-column section,if the Froude number is less than the critical value;when the Froude number is over the critical value,the ice-passing capacity is significantly increased.For the medium-large sized ice-block (L/D =0.8,1.0),the first flipped critical Froude number Ft is 0.879 and 1.090 respec tively,while the second flipped critical Froude number Ft is 1.267 and 1.355 respectively as well.The ice-passing capacity of the pier-column section is in inverse proportion to the ice amount,i.e.the larger the ice amount is,the ice-jam is more prone to occur at the pier-column section.Through the relevant dimensional analysis,a regression equation is established,from which the empirical formula for the ice-passing capacity at the pier-column section is ▽ =1.028 (e2.2sFt) (L/D)-3.567 × 100％ (0 ≤ ▽ ≤ 100％) with the complex correlation coefficient is 0.973.The study result has a certain reference value for the study on the safe water conveyance of ice-water two-phase flow and the prevention of ice-jam disaster.关键词
冰塞/物理模型试验/墩柱断面/过冰能力/冰水二相流Key words
ice-jam/physical model experiment/pier-column section/ice-passing capacity/ice-water flow two-phase分类
水利科学引用本文复制引用
吴艳,朱明远,穆祥鹏,岳春芳,周富强..渠道墩柱断面过冰能力研究[J].水利水电技术,2017,48(9):126-131,6.基金项目
国家自然科学基金项目(5154190,51579251) （5154190,51579251）
