泥石流龙头压胀机理探析  

Study on Blasting Mechanism of High Pressure Core in Debris Flow

作　　者：陈洪凯[1] 杜榕桓[2] 唐红梅[1] 王全才[2] 

机构地区：[1]重庆交通大学岩土工程研究所,重庆400074 [2]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

出　　处：《重庆交通大学学报（自然科学版）》2008年第5期790-793,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(50678182);高校博士点基金(20060618001);重庆市自然科学基金重点项目(2008BA0015)

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。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-pressure core in debris flow. These phenomena mentioned above can be explained reasonably by particle buoyancy,collision forces and additional water pressure during formation and blasting of high-pressure core. Further, formation and evolution process of high-pressure core must be checked and observed by testing; meanwhile, the mechanics of blasting mechanism of high-pressure core in debris flow should be established.

关 键 词：泥石流 龙头 压胀机理 阵性 逆序结构 颗粒浮动 

分 类 号：P642.23[天文地球—工程地质学]