[1]李天话,樊晓一*,姜元俊.岩土体颗粒级配对滑坡碎屑流冲击作用的影响研究[J].山地学报,2018,(02):289-297.[doi:10.16089/j.cnki.1008-2786.000324]
　LI Tianhua,FAN Xiaoyi,JIANG Yuanjun.Influence of Gradation on the Impact Effect of Landslide Debris Flow[J].Mountain Research,2018,(02):289-297.[doi:10.16089/j.cnki.1008-2786.000324]
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岩土体颗粒级配对滑坡碎屑流冲击作用的影响研究()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2018年02期
页码:
289-297
栏目:
山地灾害
出版日期:
2018-03-30

文章信息/Info

Title:
Influence of Gradation on the Impact Effect of Landslide Debris Flow
文章编号:
1008-2786-(2018)2-289-09
作者:
李天话1; 樊晓一1*; 姜元俊2
1.西南科技大学 土木工程与建筑学院,四川 绵阳 621010; 2.中国科学院 成都山地灾害与环境研究所,四川 成都 610041
Author(s):
LI Tianhua1;  FAN Xiaoyi1;  JIANG Yuanjun2
1.School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China; 2.Institute of Mountain Hazard and Environment, Chinese Academy of Sciences, Chengdu 610041, China
关键词:
滑坡碎屑流;  颗粒级配;  反序现象;  冲击力
Keywords:
landslide debris flow;  particle gradation;  inverse grading;  impact force
分类号:
P 642.22
DOI:
10.16089/j.cnki.1008-2786.000324
文献标志码:
A
摘要:
滑体的运动、堆积及冲击力等因素决定了滑坡碎屑流的致灾程度,不同粒径大小及组成的颗粒在运动过程中,产生碰撞、摩擦、跳跃等作用,影响着滑坡碎屑流的致灾程度。运用三维离散元素法,对比模型试验,以控制粒径为参数,探讨岩土体不同级配对滑体的堆积形态、运动速度及冲击力等动力学特征的影响。研究结果表明:各滑体模型运移堆积过程中均呈现出显著的反序分离特性; 对于控制粒径相同,而颗粒级配不同的初始滑体,虽然堆积形态基本一致,但细小碎屑颗粒增大了滑体的运动速度,大粒径块石增加了滑体冲击力; 在不同的控制粒径下,控制粒径越大,滑体流动性越强,滑体平均速度峰值和冲击力峰值越大; 细小碎屑物质的反序现象会增大滑体动能,其显著的摩擦耗能作用会缩减滑体冲击能,粗大块石促进了滑体内部的能量传递,增大滑体冲击力。
Abstract:
The movement, accumulation, impact of a mobilized landslide debris flow associated with other factors would determine the degree of damage, and its component particles with varied sizes and compositions during the movement involve internal collision, friction, and jumping, etc., therefore governing the geohazard potential level.Accordingly, it is of great scientific significance to determine the dynamic characteristics and impact force of landslide debris flow in different gradation for structural design of architecture in mountainous area and the planning and prevention work of landslide disaster.By using a three-dimensional discrete element method and comparing with model tests, in this research it took the control grain size(d60)as input and investigated the influence of rock-soil mass with varied grading on the dynamic characteristics such as deposition form, velocity and impact force of landslide debris flow.The results of existing studies suggested that all the processes of migration and accumulation of landslide debris flows simulated by sliding models exhibited significant particle segregation phenomenon, which eventually led to the inverse grading form of landslide deposits.For the initial sliding body with the same control particle size but different grain compositions, although the deposition forms were generally similar, the fine particles actually increased the velocity of the sliding body while the large grains increased the impact force of the sliding body; Under different control particle sizes, the larger the control particle size for a sliding body, it had the stronger flowability, and similarly the greater the average velocity, the higher the peak impact force.It can conclude that the segregation of fine particles compositions would increase the kinetic energy of a sliding body, while its frictional energy dissipation would significantly reduce the impact energy of landslide debris flow.The collision and segregation of coarse grains compositions could promote the energy transfer inside the sliding body and increase the impact force of landslide debris flow.

参考文献/References:

[1] FAN Xiaoyi, TIAN Shujun, ZHANG Youyi.Mass-front velocity of dry granular flows influenced by the angle of the slope to the runout plane and particle size gradation[J].Journal of Mountain Science, 2016, 13(2): 234-245.
[2] YANG Q Q, CAI F, UGAI K, et al.Some factors affecting mass-front velocity of rapid dry granular flows in a large flume[J].Engineering Geology, 2011, 122(3): 249-260.
[3] ZHOU G G D, NG C W W.Numerical investigation of reverse segregation in debris flows by DEM[J].Granular Matter, 2010, 12(5):507-516.
[4] 郝明辉,许强,杨国兴,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.]
[5] 郝明辉, 许强, 杨磊, 等.滑坡-碎屑流物理模型试验及运动机制探讨[J].岩土力学, 2014, 35(S1): 127-132.[HAO Minghui, XU Qiang, YANG Lei, et al.Physical modeling and movement mechanism of landslide-debris avalanches[J].Rock and Soil Mechanics, 2014, 35(S1): 127-132.]
[6] JIANG Yuanjun, TOWHATA I.Experimental study of dry granular flow and impact behavior against a rigid retaining wall[J].Rock Mechanics & Rock Engineering, 2013, 46(4):713-729..
[7] SALCIARINI D, TAMAGNINI C, CONVERSINI P.Discrete element modeling of debris-avalanche impact on earthfill barriers[J].Physics & Chemistry of the Earth, 2010, 35(3-5): 172-181.
[8] MORIGUCHI S, BORJA R I, YASHIMA A, et al.Estimating the impact force generated by granular flow on a rigid obstruction[J].Acta Geotechnica, 2009, 4(1):57-71.
[9] WANG Shengnian, SHI Chong, XU Weiya, et al.Estimation of Landslide Impact Disaster by Discrete Element Method: Jiangping Hydropower Station, Hubei, China[M]// Landslide science for a safer geoenvironment.Springer International Publishing, 2014:669-678.
[10] 程谦恭,胡厚田,胡广韬等.高速岩质滑坡撞击弹落冲击夯实成坝的动力学机理[J].岩石力学与工程学报, 2000, 19(1):43-46.[CHENG Qiangong, HU Houtian, HU Guangtao, et al.On the dynamic mechanism of disintegration colliding and shock damming by highspeed rocky landslide[J].Chinese Journal of Rock Mechanics and Engineering, 2000, 19(1): 43-46.]
[11] 胡国明.颗粒系统的离散元素法分析仿真[M].武汉: 武汉理工大学出版社, 2010: 1-10.[HU Guoming.Analysis and simulation of granular system by discrete element method using EDEM[M].Wuhan:Wuhan University of Technology Press, 2010:1-10.]
[12] 徐小敏, 凌道盛, 陈云敏,等.基于线性接触模型的颗粒材料细-宏观弹性常数相关关系研究[J].岩土工程学报, 2010, 32(7): 991-998.[XU Xiaomin, LING Daosheng, CHEN Yunmin, et al.Correlation of microscopic and macroscopic elastic constants of granular materials based on linear contact model[J].Chinese Journal of Rock Mechanics and Engineering, 2010, 32(7): 991-998.]
[13] 韩燕龙, 贾富国, 唐玉荣,等.颗粒滚动摩擦系数对堆积特性的影响[J].物理学报, 2014, 63(17): 165-171.[HAN Yanlong, JIA Fuguo, TANG Yurong, et al.Influence of granular co effcient of rolling friction on accumulation characteristics[J].Acta Physica Sinica, 2014, 63(17): 165-171.]
[14] BENJY M, PIERRE R, ITAI E.Grainsize dynamics of polydisperse granular segregation down inclined planes[J].Journal of Fluid Mechanics, 2012, 690(1):499-511.
[15] PHILLIPS J C, HOGG A J, KERSWELL R R, et al.Enhanced mobility of granular mixtures of fine and coarse particles[J].Earth & Planetary Science Letters, 2006, 246(3-4): 466-480.
[16] LINARESGUERRERO E, GOUJON C, ZENIT R.Increased mobility of bidisperse granular avalanches [J].Journal of Fluid Mechanics, 2007, 593: 475-504.
[17] MORO F, FAUG T, BELLOT H, et al.Large mobility of dry snow avalanches: Insights from small-scale laboratory tests on granular avalanches of bidisperse materials [J].Cold Regions Science & Technology, 2010, 62(1): 55-66.
[18] KOKELAAR B P, GRAHAMA R L, GRAY J M N T, et al.Fine-grained linings of leveed channels facilitate runout of granular flows[J].Earth & Planetary Science Letters, 2014, 385(1): 172-180.
[19] 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.]
[20] 张明, 王正波, 孙琳.滑坡碎屑流高速远程机制环剪试验研究[J].岩石力学与工程学报, 2016, 35(S1): 2673-2681.[ZHANG Ming, WANG Zhengbo, SUN Lin.Research on rapid and long-runout mechanisms of rockslide debris using ring shear tests [J].Chinese Journal of Rock Mechanics and Engineering, 2016, 35(S1): 2673-2681.]
[21] 王品, 徐则民.头寨大型高速远程滑坡碎屑流堆积体的粒度组成[J].山地学报, 2013, 31(6):745-752.[WANG Pin, XU Zemin.The grain size composition of Touzhai rock-avalanche deposits[J].Journal of Mountain Science, 2013, 31(6): 745-752.]
[22] 樊晓一, 李天话, 田述军,等.未完全受阻地震滑坡运动距离的影响因素及机制分析[J].地震地质, 2017, 39(4): 754-767.[FAN Xiaoyi, LI Tianhua, TIAN Shujun, et al.Controlling factors and mechanisms of incomplete obstruction seismic landslide mobility[J].Seismology and Geology, 2017, 39(4): 754-767.]
[23] 樊晓一, 田述军, 段晓冬,等.地形因子对坡脚型地震滑坡运动参数的影响研究[J].岩石力学与工程学报, 2014, 33(S2): 4056-4066.[FAN Xiaoyi, TIAN Shujun, DUAN Xiaodong, et al.Study of topography factors influence on motion parameters for seismic slope-toe landslides[J].Chinese Journal of Rock Mechanics and Engineering, 2014, 33(S2): 4056-4066.]
[24] 吴越, 刘东升, 李明军.岩体滑坡冲击能计算及受灾体易损性定量评估[J].岩石力学与工程学报, 2011, 30(5):901-909.[WU Yue, LIU Dongsheng, LI Mingjun.Impact energy calculation for rock slope and quantitative assessment of vulnerability for element at risk[J].Chinese Journal of Rock Mechanics and Engineering, 2011, 30(5):901-909.]
[25] 吴越, 刘东升, 李硕洋.基于滑体与受灾体共同作用的冲击能计算模型[J].岩石力学与工程学报, 2012, 31(S1):2636-2643.[WU Yue, LIU Dongsheng, LI Shuoyang.Calculation model of impact energy based on interaction of landslide mass and disaster-affected bodies[J].Chinese Journal of Rock Mechanics and Engineering, 2012, 31(S1): 2636-2643.]

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备注/Memo

备注/Memo:
收稿日期(Received date):2017-07-23; 改回日期( Accepted):2018-04-26。
基金项目(Foundation item):国家自然科学基金项目(41272297; 41502334); 绵阳市科技计划项目(16S-02-4); 中国科学院“率先行动”百人计划资助。[National Natural Science Foundation of China(41272297; 41502334); Science and Technology Program of Mianyang, China(16S-02-4); The Program of “One Hundred Talented People” of Chinese Academy of Sciences.]
作者简介(Biography):李天话(1992-),男,硕士研究生,主要从事岩土工程及地质灾害方面的研究。[LI Tianhua(1992- ), male, M.Sc.candidate, research on geotechnical engineering and geological hazard.] E-mail:345527238@qq.com
*通讯作者(Corresponding author):樊晓一(1974-),男,博士,教授,主要从事岩土工程及地质灾害方面的教学与研究工作。[FAN Xiaoyi(1974- ), male, professor, Ph.D., research on geological engineering and geological hazard.] E-mail: xyfan1003@126.com
更新日期/Last Update: 2018-03-30