高速远程滑坡裹气流态化动力学特性实验研究

发布时间：2018-03-02 12:34

本文选题：边坡工程　切入点：高速远程滑坡　出处：《岩石力学与工程学报》2016年02期 　论文类型：期刊论文

【摘要】：为定量化揭示高速远程滑坡在裹入气流作用下的动力学特性,以高速远程滑坡裹气流态化运动特性实验成果为基础,运用自行设计的水平圆环式旋转剪切流变装置,开展一系列环剪实验,获取碎屑流在不同裹入气流作用下的动态抗剪强度参数。结果表明:(1)碎屑流运动过程中,气体的裹入,可起到明显的减阻作用;(2)在碎屑流的整个运动过程中,随着时间的推移,碎屑流与环盖间剪切力并非一恒定值,而是呈现出忽高忽低的波动性演化特征;(3)随着碎屑流受剪时间的增长,碎屑流与环盖间剪切力值整体呈略微增长的趋势,且剪切速率越大,该趋势越明显。
[Abstract]:In order to quantitatively reveal the dynamic characteristics of high speed and long distance landslide under the action of air entrainment, based on the experimental results of the fluidized movement characteristics of high speed remote landslide, a self designed horizontal circular rotary shear rheometer was used. A series of annular shear experiments were carried out to obtain the dynamic shear strength parameters of the debris flow under the action of different entrainment airflow. During the whole movement of the debris flow, the shear force between the debris flow and the ring cover is not a constant value with the passage of time. But it shows a fluctuating evolution characteristic of fluctuating high and low.) with the increase of shearing time of clastic flow, the shear force between clastic flow and annular cap increases slightly, and the more shear rate, the more obvious this trend is.
【作者单位】：西南交通大学地质工程系;成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：国家自然科学基金资助项目(41530639、41502289) 成都理工大学地质灾害防治与地质环境保护国家重点实验室开放基金项目(SKLGP2015K012)~~
【分类号】：P642.22

【参考文献】