| 唐益群,袁斌,李军鹏.基于正交试验的黄土泥流运动分析[J].水利学报,2015,46(2): |
| 基于正交试验的黄土泥流运动分析 |
| Movement analysis of loess mud flow based on orthogonal experiment |
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| DOI： |
| 中文关键词: 泥流 正交试验 瞬时速度 阵流 |
| 英文关键词: mud flow orthogonal experiment instantaneous velocity intermittent debris flow |
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| 中文摘要: |
| 中国西北地区广泛分布着黄土且较厚，近些年，由于人们对泥流沟道的改造和环境的变化，泥流灾害在黄土地区不断加剧。本次研究，利用泥流沟道模型结合正交试验设计研究泥流的运动特性，得出流量对泥流平均速度影响最大，其次是容重，最后是坡度。泥流瞬时速度随时间变化表现出波的一些特性，波峰、波谷的交替变化表明，泥流运动时下垫层、沟谷形态对泥流运动影响较大。容重一定时，流量越大，瞬时速度变化范围越大。泥流在运动过程中存在明显的阵流，流量越大阵流次数越多，可以建立某一地区的阵流图，为泥流的预警和防治提供参考。 |
| 英文摘要: |
| Vast expanse of land in the northwest China is covered by thick loess. In recent years， due to the transformation of mud flow channel and the change of environment，mud flow disaster is rising in loess areas. The movement characteristics of mud flow were studied on the basis of the model of mud flow ditch and orthogonal experiment. The results show that discharge has the largest impact on mean velocity， flowed by unit weight and ditch slope angle. The instantaneous velocity is wavy with time. The alternating change between peaks and valleys shows that bedding layer and valley shape have a great influence on mud flow movement. When the unit weight is constant， the bigger the flow rate is， the bigger range of the instantaneous velocity will be. Intermittent debris flow is very obvious during mud flow moving，and the more the discharge is，the more the intermittent debris flow will be. The intermittent debris flow chart can provide a reference for early warning and prevention of mud flow. |
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