ISSN 1000-3665 CN 11-2202/P
  • 中文核心期刊
  • CSCD核心期刊
  • 中科双效期刊
  • 中国科技核心期刊
  • Caj-cd规范获奖期刊
欢迎扫码关注“i环境微平台”

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

基于物理模型试验的碎屑流流态化运动特征分析

龙艳梅 宋章 王玉峰 程谦恭 李坤 吴越

龙艳梅, 宋章, 王玉峰, 程谦恭, 李坤, 吴越. 基于物理模型试验的碎屑流流态化运动特征分析[J]. 水文地质工程地质. doi: 10.16030/j.cnki.issn.1000-3665.202011035
引用本文: 龙艳梅, 宋章, 王玉峰, 程谦恭, 李坤, 吴越. 基于物理模型试验的碎屑流流态化运动特征分析[J]. 水文地质工程地质. doi: 10.16030/j.cnki.issn.1000-3665.202011035
LONG Yanmei, SONG Zhang, WANG Yufeng, CHENG Qiangong, LI Kun, WU Yue. An analysis of flow-like motion of avalanches based on physical modeling experiments[J]. Hydrogeology & Engineering Geology. doi: 10.16030/j.cnki.issn.1000-3665.202011035
Citation: LONG Yanmei, SONG Zhang, WANG Yufeng, CHENG Qiangong, LI Kun, WU Yue. An analysis of flow-like motion of avalanches based on physical modeling experiments[J]. Hydrogeology & Engineering Geology. doi: 10.16030/j.cnki.issn.1000-3665.202011035

基于物理模型试验的碎屑流流态化运动特征分析

doi: 10.16030/j.cnki.issn.1000-3665.202011035
基金项目: 国家重点研发计划重点专项(2017YFC1501000);国家自然科学基金项目(41941017; 41530639; 41761144080; 41877226)
详细信息
    作者简介:

    龙艳梅(1995-),女,硕士研究生,主要从事高速远程滑坡研究。E-mail:2391510283@qq.com

    通讯作者:

    王玉峰(1986-),女,博士,副教授,硕士生导师,主要从事高速远程滑坡动力学研究。E-mail:wangyufeng@swjtu.edu.cn

  • 中图分类号: P642.2

An analysis of flow-like motion of avalanches based on physical modeling experiments

  • 摘要: 流态化运动是高速远程滑坡的主要运动形式,是揭示高速远程滑坡运动机理的重要基础。本文基于粒子图像测速(PIV)分析方法,采用物理模型试验对不同粒径组成条件下的颗粒流内部的速度分布特征、剪切变形特征及流态特征进行了研究,并对高速远程滑坡流态化运动特征进行了讨论分析。结果表明,碎屑流流态化运动特征与颗粒粒径呈显著的相关性,随着粒径的减小或细颗粒含量的增加,颗粒流底部相对于边界的滑动速度以及整体的运动速度均呈现逐渐减小的趋势,颗粒流内部剪切变形程度增加,颗粒的运动形式由“滑动”向“流动”转变。当颗粒粒径较小或细颗粒含量较高时,颗粒流内部剪切速率增大的趋势在颗粒流底部更加显著,反映了粒径减小有助于促进颗粒流内部剪切向底部的集中。在同一颗粒流的不同运动阶段及不同纵向深度,其流态特征具有显著差别,颗粒流前缘及尾部主要呈惯性态,颗粒间以碰撞作用为主,而主体部分则主要呈密集态,颗粒间以摩擦接触作用为主;在颗粒流表面及底部,颗粒间相互作用方式主要是碰撞作用,中间部分则以摩擦作用为主。对于不同粒径的颗粒流,随着粒径的增大或粗颗粒含量的增加,颗粒流内部颗粒的碰撞作用加强,颗粒流整体趋于向惯性态转变。
  • 图  1  试验装置示意图

    Figure  1.  Sketches of the experimental apparatus

    图  2  试验材料

    Figure  2.  Granular materials for the experiments

    图  3  不同分形维数粒径级配曲线

    Figure  3.  Grain size distribution curves of granular materials with different fractal dimensions

    图  4  PIV计算速度分布曲线示意图

    Figure  4.  Schematic diagram of PIV analysis

    图  5  颗粒流速度分布特征

    Figure  5.  Velocity distributions of the granular flow

    图  6  单粒径颗粒流速度分布特征

    Figure  6.  Velocity distributions of the mono-disperse granular flow

    图  7  多粒径颗粒流速度分布特征

    Figure  7.  Velocity distributions of the poly-disperse granular flow

    图  8  单粒径颗粒流剪切速率分布特征

    Figure  8.  Shear rate distributions of the mono-disperse granular flow

    图  9  多粒径颗粒流剪切速率分布特征

    Figure  9.  Shear rate distributions of the poly-disperse granular flow

    图  10  单粒径颗粒流高速摄影图像

    Figure  10.  Snapshots of the mono-disperse granular flow

    图  11  多粒径高速摄影图像

    Figure  11.  Snapshots of the polydisperse granular flow

    图  12  颗粒流Savage数随高度的变化特征

    Figure  12.  Variations in the Savage number with the granular flow height

    表  1  试验工况设计

    Table  1.   Design of experimental conditions

    粒径组成编号工况条件平均粒径/mm内摩擦角/(°)质量
    单粒径M1d=0.25−0.5 mm0.3826.78 kg
    M2d=0.5−1 mm0.7528.2
    M3d=1−2 mm1.528.1
    M4d=2−5 mm3.531.0
    M5d=5−7 mm633.0
    多粒径F1D=1.53.9632.2
    F2D=2.03.4131.4
    F3D=2.52.1430.6
    F4D=3.00.7528.4
    F5D=3.50.3028.1
    下载: 导出CSV
  • [1] Heim. Landslides and human lives[M]. Vancouver, B C: Bitech Publishers, 1932: 80-88.
    [2] 程谦恭, 张倬元, 黄润秋. 高速远程崩滑动力学的研究现状及发展趋势[J]. 山地学报,2007,25(1):72 − 84. [Cheng Qiangong, Zhang Zhuoyuan, Huang Runqiu. Study on dynamics of rock avalanches: state of the art report[J]. Journal of Mountain Science,2007,25(1):72 − 84. (in Chinese with English abstract) doi:  10.3969/j.issn.1008-2786.2007.01.007
    [3] 陈达, 许强, 郑光, 等. 基于颗粒识别分析系统的碎屑流堆积物颗粒识别和统计方法研究[J]. 水文地质工程地质,2021,48(1):60 − 69. [CHEN Da, XU Qiang, ZHENG Guang, et al. Particle identification and statistical methods of a rock avalanche accumulation body based on the particle analysis system[J]. Hydrogeology & Engineering Geology,2021,48(1):60 − 69. (in Chinese with English abstract)
    [4] 陈禄俊, 邢爱国, 陈龙珠, 等. 高速远程滑坡飞行数值分析[J]. 水文地质工程地质,2008,35(5):1 − 6. [CHEN Lujun, XING Aiguo, CHEN Longzhu, et al. Numerical analysis on the flying of highspeed and long runout landslide[J]. Hydrogeology & Engineering Geology,2008,35(5):1 − 6. (in Chinese with English abstract) doi:  10.3969/j.issn.1000-3665.2008.05.002
    [5] 温铭生, 陈红旗, 张鸣之, 等. 四川茂县"6·24"特大滑坡特征与成因机制分析[J]. 中国地质灾害与防治学报,2017,28(3):1 − 7. [WEN Mingsheng, CHEN Hongqi, ZHANG Mingzhi, et al. Characteristics and formation mechanism analysis of the "6·24" catastrophic landslide of the June 24 of 2017, at Maoxian, Sichuan[J]. The Chinese Journal of Geological Hazard and Control,2017,28(3):1 − 7. (in Chinese with English abstract)
    [6] 戴兴建, 殷跃平, 邢爱国. 易贡滑坡-碎屑流-堰塞坝溃坝链生灾害全过程模拟与动态特征分析[J]. 中国地质灾害与防治学报,2019,30(5):1 − 8. [DAI Xingjian, YIN Yueping, XING Aiguo. Simulation and dynamic analysis of Yigong rockslide-debris avalanche-dam breaking disaster chain[J]. The Chinese Journal of Geological Hazard and Control,2019,30(5):1 − 8. (in Chinese with English abstract)
    [7] KENT P E. The transport mechanism in catastrophic rock Falls[J]. Journal of Geology,1966,74(1):79 − 83. doi:  10.1086/627142
    [8] 王玉峰, 许强, 程谦恭, 等. 高速远程滑坡裹气流态化动力学特性实验研究[J]. 岩石力学与工程学报,2016,35(2):268 − 274. [WANG Yufeng, XU Qiang, CHENG Qiangong, et al. Experimental study of dynamical shearing behaviors of rock avalanche debris under the effect of entrapped gas[J]. Chinese Journal of Rock Mechanics and Engineering,2016,35(2):268 − 274. (in Chinese with English abstract)
    [9] MELOSH H J. The physics of very large landslides[J]. Acta Mechanica,1986,64(1/2):89 − 99.
    [10] 王玉峰, 程谦恭, 朱圻. 汶川地震触发高速远程滑坡–碎屑流堆积反粒序特征及机制分析[J]. 岩石力学与工程学报,2012,31(6):1089 − 1106. [WANG Yufeng, CHENG Qiangong, ZHU Qi. Inverse grading analysis of deposit from rock avalanches triggered by Wenchuan earthquake[J]. Chinese Journal of Rock Mechanics and Engineering,2012,31(6):1089 − 1106. (in Chinese with English abstract) doi:  10.3969/j.issn.1000-6915.2012.06.002
    [11] DAVIES T R, MCSAVENEY M J. The role of rock fragmentation in the motion of large landslides[J]. Engineering Geology,2009,109(1/2):67 − 79.
    [12] GASSEN W V, CRUDEN D M. Momentum transfer and friction in the debris of rock avalanches[J]. Canadian Geotechnical Journal,1989,26(4):623 − 628. doi:  10.1139/t89-075
    [13] SASSA K. Geotechnical model for the motion of landslides. Proceedings of the 5 International Symposium on landslides[J]. Lausanne Switzer land,1988:37 − 55.
    [14] HUNGR O. A model for the runout analysis of rapid flow slides, debris flows, and avalanches[J]. Canadian Geotechnical Journal,1995,32(4):610 − 623. doi:  10.1139/t95-063
    [15] 李坤, 王玉峰, 程谦恭, 等. 分形粒径分布对颗粒流粒径分选的影响规律[J]. 岩石力学与工程学报,2021,40(2):330 − 343. [LI Kun, WANG Yufeng, CHENG Qiangong, et al. Effects of fractal particle size distribution on segregation of granular flows[J]. Chinese Journal of Rock Mechanics and Engineering,2021,40(2):330 − 343. (in Chinese with English abstract)
    [16] HUNGR O, LEROUEIL S, PICARELLI L. The Varnes classification of landslide types, an update[J]. Landslides,2014,11(2):167 − 194. doi:  10.1007/s10346-013-0436-y
    [17] SAVAGE S B, HUTTER K. The motion of a finite mass of granular material down a rough incline[J]. Journal of Fluid Mechanics,1989,199:177 − 215. doi:  10.1017/S0022112089000340
    [18] ARMANINI A. Granular flows driven by gravity[J]. Journal of Hydraulic Research,2013,51(2):111 − 120. doi:  10.1080/00221686.2013.788080
    [19] LI Kun, WANG Yufeng, LIN Qiwen, et al. Experiments on granular flow behavior and deposit characteristics: implications for rock avalanche kinematics[J]. Landslides,2021,18(5):1779 − 1799. doi:  10.1007/s10346-020-01607-z
    [20] DAVIES T R, MCSAVENEY M J. Runout of dry granular avalanches[J]. Canadian Geotechnical Journal,1999,36(2):313 − 320. doi:  10.1139/t98-108
    [21] MANZELLA I, LABIOUSE V. Flow experiments with gravel and blocks at small scale to investigate parameters and mechanisms involved in rock avalanches[J]. Engineering Geology,2009,109(1/2):146 − 158.
    [22] 王玉峰, 许强, 程谦恭, 等. 复杂三维地形条件下滑坡–碎屑流运动与堆积特征物理模拟实验研究[J]. 岩石力学与工程学报,2016,35(9):1776 − 1791. [WANG Yufeng, XU Qiang, CHENG Qiangong, et al. Experimental study on the propagation and deposit features of rock avalanche along 3D complex topography[J]. Chinese Journal of Rock Mechanics and Engineering,2016,35(9):1776 − 1791. (in Chinese with English abstract)
    [23] 郝明辉, 许强, 杨兴国, 等. 高速滑坡–碎屑流颗粒反序试验及其成因机制探讨[J]. 岩石力学与工程学报,2015,34(3):472 − 479. [HAO Minghui, XU Qiang, YANG Xingguo, et al. Physical modeling tests on inverse grading of particles in high speed landslide debris[J]. Chinese Journal of Rock Mechanics and Engineering,2015,34(3):472 − 479. (in Chinese with English abstract)
    [24] 李祥龙, 唐辉明, 熊承仁, 等. 基底刮铲效应对岩石碎屑流停积过程的影响[J]. 岩土力学,2012,33(5):1527 − 1534. [LI Xianglong, TANG Huiming, XIONG Chengren, et al. Influence of substrate ploughing and erosion effect on process of rock avalanche[J]. Rock and Soil Mechanics,2012,33(5):1527 − 1534. (in Chinese with English abstract) doi:  10.3969/j.issn.1000-7598.2012.05.039
    [25] 陆鹏源, 侯天兴, 杨兴国, 等. 滑坡冲击铲刮效应物理模型试验及机制探讨[J]. 岩石力学与工程学报,2016,35(6):1225 − 1232. [LU Pengyuan, HOU Tianxing, YANG Xingguo, et al. Physical modeling test for entrainment effect of landslides and the related mechanism discussion[J]. Chinese Journal of Rock Mechanics and Engineering,2016,35(6):1225 − 1232. (in Chinese with English abstract)
    [26] 张志东, 樊晓一, 姜元俊. 滑源区粒序分布及颗粒粒径对碎屑流冲击作用的影响研究[J]. 水文地质工程地质,2021,48(1):49 − 59. [ZHANG Zhidong, FAN Xiaoyi, JIANG Yuanjun. Particle sequence distribution and the effect of particle size on the impact effect in a fluidized landslide-debris flow[J]. Hydrogeology & Engineering Geology,2021,48(1):49 − 59. (in Chinese with English abstract)
    [27] CROSTA G B, FRATTINI P, FUSI N. Fragmentation in the val pola rock avalanche, Italian Alps[J]. Journal of Geophysical Research:Earth Surface,2007,112(F1):F01006.
    [28] SAMMIS C, KING G, BIEGEL R. The kinematics of gouge deformation[J]. Pure and Applied Geophysics,1987,125(5):777 − 812. doi:  10.1007/BF00878033
    [29] SILBERT L E, ERTAŞ D, GREST G S, et al. Granular flow down an inclined plane: Bagnold scaling and rheology[J]. Physical Review E, Statistical, Nonlinear, and Soft Matter Physics,2001,64(5pt1):051302.
    [30] DUFRESNE A, PRAGER C, BÖSMEIER A. Insights into rock avalanche emplacement processes from detailed morpho-lithological studies of the Tschirgant deposit (Tyrol, Austria)[J]. Earth Surface Processes and Landforms,2016,41(5):587 − 602. doi:  10.1002/esp.3847
    [31] HUNGER O, MORGENSTERN N R. Experiments on the flow behaviour of granular materials at high velocity in an open channel[J]. Géotechnique,1984,34(3):405 − 413.
  • 加载中
图(12) / 表(1)
计量
  • 文章访问数:  21
  • HTML全文浏览量:  6
  • PDF下载量:  18
  • 被引次数: 0
出版历程
  • 收稿日期:  2020-11-16
  • 修回日期:  2021-03-06
  • 网络出版日期:  2021-11-23

目录

    /

    返回文章
    返回