长江科学院院报Issue(3)：9-13,5.DOI:10.11988/ckyyb.20140919
泥石流窗口坝调节泥砂粒径试验研究
Experimental Study on the Function of Window-Frame Dam in Changing Sediment Size Distribution for Debris Flow Prevention
摘要
Abstract
Window⁃frame dam is a common measure in debris flow prevention engineering. The function of changing sediment size distribution is one of the main factors in the design of window⁃frame dam, and is also an urgent issue to be solved. In order to improve the design methods, we conduct a series of experiments to research the function of changing sediment size distribution of window⁃frame dam. Results show that 1) window⁃frame dam has a function of trapping coarse sand and discharging fine sand, and this function has a worst performance for viscous debris flow compared with trapping sub⁃viscous and intermediate debris flow;2) we put forward the concept of critical particle size for the first time and give a variation range of critical particle; 3 ) the critical particle size and its variation range were affected by the density of debris flow and the type of window⁃frame dam ( totally blocked, partially blocked, and open dams);4) the critical particle size increases with the increase of density of debris flow for the same window⁃frame dam.关键词
窗口坝/泥石流/粒径调节/闭塞类型/临界粒径Key words
window-frame dam/debris flows/change of sediment size distribution/blocked type/critical particle size分类
天文与地球科学引用本文复制引用
赵彦波,游勇,柳金峰,林雪平,刘曙亮..泥石流窗口坝调节泥砂粒径试验研究[J].长江科学院院报,2016,(3):9-13,5.基金项目
国家科技支撑计划项目（2012BAC06B02）；中国科学院重点部署项目 （）
