發(fā)布時(shí)間：2018-03-16 19:09

  本文選題：U形渠道　切入點(diǎn)：量水堰　出處：《中國(guó)農(nóng)村水利水電》2017年10期 　論文類型：期刊論文

【摘要】：針對(duì)底坡大于1/200的U形渠道的量水設(shè)施匱乏,設(shè)計(jì)了一種斜坎量水堰,通過在U形渠道上對(duì)9種不同體型斜坎量水堰在8種流量下的72組過堰水力性能原型試驗(yàn),分析了水面線變化趨勢(shì)、堰高及量水堰坡度對(duì)上游壅水高度的影響,研究了各斷面水深與流量的關(guān)系。結(jié)果表明:量水堰上游坡度和堰高對(duì)水面線、上游壅水高度影響較大,且堰高的影響大于量水堰坡度對(duì)其的影響;建立的斜坎量水堰測(cè)流公式精度較高,在量水堰堰高大于5 cm時(shí)誤差基本分布在±8%以內(nèi)。量水堰建議堰高P小于10 cm,堰長(zhǎng)L為堰高P的10~12倍。
[Abstract]:In view of the shortage of water measuring facilities in U-shaped channel with bottom slope greater than 1/200, a slanting sill Weir was designed, and 72 groups of overweirs with 9 different types of slanting sill Weir under 8 different flow rates were tested on U-shaped channel. The variation trend of water surface line and the influence of Weir height and Weir gradient on backwater height are analyzed. The relationship between water depth and discharge of each section is studied. The results show that the upstream slope and Weir height have a great influence on the water surface line and the backwater height upstream. The influence of Weir height is greater than that of Weir slope, and the accuracy of the formula established for measuring the flow of slanting sill Weir is higher than that of the measured Weir. When the Weir height is more than 5 cm, the error distribution is within 鹵8%. The recommended Weir height P is less than 10 cm, and the Weir length L is 10 ~ 12 times of Weir height P.
【作者單位】： 西北農(nóng)林科技大學(xué)旱區(qū)農(nóng)業(yè)水土工程教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：公益性行業(yè)(農(nóng)業(yè))科研專項(xiàng)(201503125) “十三五”國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFC0400200)
【分類號(hào)】：TV135

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