泥石流梁式格栅坝闭塞临界判据及其拦沙性能试验研究
发布时间：2018-07-16 08:22
【摘要】：梁式格栅坝是常用的泥石流透过型拦砂坝之一,因其拦粗排细、汰沙排水等特点以及良好的工程和环境效益而在泥石流防治工程中有较好的应用前景。通过试验模拟梁式格栅坝对泥石流的拦截过程,提出了一种考虑多因素影响的格栅坝闭塞临界条件综合判据F。当F≤3时,梁式格栅坝表现为全闭塞;当3F11时,梁式格栅坝表现为部分闭塞;当F≥11时,梁式格栅坝表现为未闭塞。研究认为横梁间距对泥石流梁式格栅坝闭塞条件的影响大于泥石流容重的影响,而沟道纵坡相对上述两者影响有限;分析得到了梁式格栅坝拦沙率与泥石流容重以及横梁间距之间的计算关系式;此外,试验发现梁式格栅坝的闭塞表现和拦砂性能与泥石流的速度和颗粒形状有一定关系。
[Abstract]:Beam grille dam is one of the commonly used debris flow through sand bar. It has a good application prospect in debris flow prevention and control engineering because of its characteristics of coarse drainage, sand removal and drainage, as well as good engineering and environmental benefits. By simulating the blocking process of debris flow by beam grille dam, a comprehensive criterion of critical condition for blocking of grille dam is proposed, which takes into account the influence of many factors. When F 鈮，
本文编号：2125812
[Abstract]:Beam grille dam is one of the commonly used debris flow through sand bar. It has a good application prospect in debris flow prevention and control engineering because of its characteristics of coarse drainage, sand removal and drainage, as well as good engineering and environmental benefits. By simulating the blocking process of debris flow by beam grille dam, a comprehensive criterion of critical condition for blocking of grille dam is proposed, which takes into account the influence of many factors. When F 鈮，
本文编号：2125812
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