| 利用冲击力信号判断泥石流颗粒垂向分选的试验研究 |
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| 引用本文： | 杨红娟,韦方强,胡凯衡,洪勇.利用冲击力信号判断泥石流颗粒垂向分选的试验研究[J].灾害学,2011(4):29-34. |
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| 作者姓名： | 杨红娟 韦方强 胡凯衡 洪勇 |
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| 作者单位： | 中国科学院山地灾害与地表过程重点实验室;中国科学院·水利部成都山地灾害与环境研究所; |
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| 基金项目： | 国家自然科学基金项目(40771026); 中国科学院成都山地灾害与环境研究所青年百人团队项目 |
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| 摘 要： | 分别提出根据冲击力数据的波动强度和峰值情况进行泥石流颗粒垂向分选研究的系统方法,并配置了三组不同容重(2 095 kg/m3、2 008 kg/m3和1 960 kg/m3)的粘性泥石流样品开展泥石流冲击试验。两种方法的分析结果基本一致,即容重为2 095 kg/m3的泥石流分选不明显,其他两组泥石流呈现出正粒序分布且容重越小分选越显著。量纲分析表明,开展的试验粘滞力在运动中起主导作用,颗粒之间作用力较小,不容易发生反粒序分选,这与通过冲击力分析颗粒垂向分选的结果一致,因此提出的利用冲击力信号判断泥石流颗粒垂向分选的系统方法具有适用性。
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| 关 键 词： | 泥石流 颗粒分选 冲击力 试验 |
Experimental Study on Vertical Sorting of Particles in Debris Flow with Impact Signals |
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| Yang Hongjuan,Wei Fangqiang,Hu Kaiheng , Hong Yong.Experimental Study on Vertical Sorting of Particles in Debris Flow with Impact Signals[J].Journal of Catastrophology,2011(4):29-34. |
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| Authors: | Yang Hongjuan Wei Fangqiang Hu Kaiheng Hong Yong |
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| Institution: | Yang Hongjuan1,2,Wei Fangqiang2,Hu Kaiheng2 and Hong Yong2(1.Key Laboratory of Mountain Hazards and Surface Process,Chinese Academy of Sciences,Chengdu 610041,China,2.Institute of Mountain Hazards and Environment,China) |
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| Abstract: | Studying vertical sorting of particles is important for understanding the complex mechanism of debris flow.In this paper we proposed two methods to judge vertical sorting of particles in debris flow.One is based on the standard deviation of impact signals,and the other is based on the peaks in impact signals.We carried out three groups of flume tests with debris densities of 2 095 kg/m3,2 008 kg/m3 and 1 960 kg/m3,respectively.Results of the two methods are similar.There is no significant vertical sorting w... |
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| Keywords: | debris flow particle sorting impact pressure test |
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