急陡沟道泥石流的消防管效应形成机制研究  

Study on Formation Mechanism of Fire Hose Effect of Urgent Steep-Channel Debris Flows

作　　者：屈永平 肖进[1] QU Yongping;XIAO Jin(Sichuan College of Architectural Technology,Deyang 618000,Sichuan,China)

机构地区：[1]四川建筑职业技术学院,四川德阳618000

出　　处：《水力发电》2020年第8期38-42,47,共6页Water Power

基　　金：四川建筑职业技术学院科研项目(2017KJ21);德阳重点科学技术研究项目(2015zz035);德阳市应用与技术开发项目(2017zz063);四川省教育厅科研项目(18ZA0326)。

摘　　要：通过对震区泥石流沟的地形因素和泥石流沟道物源条件的野外调查和遥感解译,对震区急陡沟道泥石流的起动机制进行研究。结果表明,在急陡沟道条件下,震区急陡沟道泥石流的消防管效应形成机制主要为大高差条件下的势能和动能的转换和"V"形沟道条件下的伯努利效应,势能转换为动能条件下的消防管效应与运动高差呈指数函数关系,而伯努利效应下的消防管效应与沟道横切面积变化密切相关。Based on field investigation and remote sensing interpretation,the topographical factors and the source conditions of debris flow gullies in the earthquake area are studied,and the starting mechanism of urgent steep-channel debris flows is analyzed.The results shown that the formation mechanism of fire hose effect of urgent steep-channel debris flow is mainly relevant to the conversion of potential energy and kinetic energy under the condition of large height difference and the Bernoulli effect of“V”channel.The relationship between fire hose effect and movement height difference is exponential function under the condition of potential energy conversion to kinetic energy,while the fire hose effect under the Bernoulli effect closely relates to the cross cutting area of channel changes of debris flows.

关 键 词：急陡沟道 泥石流 起动机理 消防管效应 

分 类 号：P642.23[天文地球—工程地质学]