泥石流龙头的形成及特征研究

发布时间：2018-03-14 03:19

本文选题：泥石流　切入点：均质沙　出处：《水利学报》2017年04期 　论文类型：期刊论文

【摘要】：泥石流龙头的高度反映了泥石流的规模,是防治工程的重要参数之一。陡峻的地形、大量松散固体物质、丰富的水源构成了泥石流发生的三大要素,同时也是影响泥石流龙头高度的重要因素。通过采用均质沙及宽级配沙进行水槽实验,探究泥石流运动过程中龙头高度与沟道物质级配、流量、坡度之间的关系,提出泥石流龙头高度随流量、坡度、平均粒径、细沙含量的增加,呈先上升后下降的趋势。利用回归分析方法,采用水流功率的概念,建立了泥石流龙头高度计算模型,并采用其他科学家的试验数据进行了验证,可为预测不同条件下泥石流规模提供科学依据。
[Abstract]:The height of the debris flow faucet reflects the scale of the debris flow and is one of the important parameters of the prevention and control project. The steep terrain, a large amount of loose solid material, and abundant water sources constitute the three main elements of the debris flow. It is also an important factor to influence the faucet height of debris flow. By using homogeneous sand and wide gradation sediment to carry out flume experiments, the relationship between bibcock height and channel material gradation, discharge and slope during debris flow movement is explored. With the increase of flow, slope, average particle size and fine sand content, the debris flow faucet height increases first and then decreases. By using the method of regression analysis and the concept of water power, the calculation model of debris flow faucet height is established. The experimental data of other scientists are used to verify the results, which can provide scientific basis for predicting the scale of debris flow under different conditions.
【作者单位】：中国科学院水利部成都山地灾害与环境研究所/中国科学院山地灾害与地表重点实验室;中国科学院青藏高原地球科学卓越创新中心;清华大学水利水电工程系;
【基金】：中国科学院国际合作局对外合作重点项目(131551KYSB20150009);中国科学院重点部署项目(KZZD-EW-05-01)
【分类号】：P642.23

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