中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2008, Vol. 27 ›› Issue (5): 790-793.

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泥石流龙头压胀机理探析

陈洪凯1, 杜榕桓2, 唐红梅1, 王全才2   

  1. 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
  • 收稿日期:2008-04-08 出版日期:2008-10-20 发布日期:2016-11-07
  • 作者简介:陈洪凯,(1964-),男,重庆江津人,教授,博士后,博士生导师,新世纪百千万人才工程国家级人选,从事动力地貌学、地质安全理论及工程结构健康研究。E-mail:chk_cq@163.ne;Tel/Fax:+86-023-62652719。
  • 基金资助:
    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)

Study on Blasting Mechanism of High Pressure Core in Debris Flow

CHEN Hong-kai1, DU Rong-huan2, TANG Hong-mei1, WANG Quan-cai2   

  1. 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
  • Received:2008-04-08 Online:2008-10-20 Published:2016-11-07

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。

关键词: 泥石流, 龙头, 压胀机理, 阵性, 逆序结构, 颗粒浮动

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-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.

Key words: 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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