| 泥石流龙头压胀机理探析 |
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| 引用本文： | 陈洪凯,杜榕桓,唐红梅,王全才.泥石流龙头压胀机理探析[J].重庆交通大学学报(自然科学版),2008,27(5):790-793. |
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| 作者姓名： | 陈洪凯 杜榕桓 唐红梅 王全才 |
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| 作者单位： | 重庆交通大学,岩土工程研究所,重庆,400074;中国科学院,水利部,成都山地灾害与环境研究所,四川,成都,610041 |
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| 基金项目： | 国家自然科学基金，教育部高等学校博士学科点专项科研基金，重庆市自然科学基金 |
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| 摘 要： | 目前国内外尚无一种理论可以同时合理地解释泥石流阵性流动、沉积相逆序结构及粗大颗粒在泥石流体表层上下浮动等现象。假定在泥石流龙头内部因固液分相流速差异孕发的压胀核,其内部压力逐渐增大至某一临界值时突然爆炸溃灭,此过程称为泥石流龙头压胀机理。压胀核形成与爆炸溃灭产生的颗粒浮力、碰撞力和超孔隙压力可以同时合理地解释泥石流阵流等现象。进一步研究中,应通过实验观测压胀核的形成演化过程,并建立压胀机理力学过程。
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| 关 键 词： | 泥石流 龙头 压胀机理 阵性 逆序结构 颗粒浮动 |
Study on Blasting Mechanism of High Pressure Core in Debris Flow |
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| CHEN Hong-kai,DU Rong-huan,TANG Hong-mei,WANG Quan-cai.Study on Blasting Mechanism of High Pressure Core in Debris Flow[J].Journal of Chongqing Jiaotong University,2008,27(5):790-793. |
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| Authors: | CHEN Hong-kai DU Rong-huan TANG Hong-mei WANG Quan-cai |
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| Institution: | CHEN Hong-kai1,DU Rong-huan2,TANG Hong-mei1,WANG Quan-cai2(1.Institute of Geotechnical Engineering,Chongqing Jiaotong University,Chongqing 400074,China,2.Chengdu Institute of Mountain Hazard & Environment,Chinese Academy of Science,Sichuan Chengdu 610041,China) |
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| Abstract: | At present,no theory at home and abroad can be used to interpret some phenomena reasonably and simultaneously.The phenomena include surging motion of debris flow,anti-grade deposits and fluctuation motion for coarse particle on debris flow.It is assumed that there is a high-pressure core by different velocities of solid and liquid in debris flow snout.When interior pressure in the core increases and reaches a critical value,the core blasts suddenly.This process is named as blasting mechanism of high-pressur... |
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| Keywords: | debris flow debris flow snout blasting mechanism of high-pressure core in debris flow surging anti-grade deposits fluctuation of particles |
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