[1]赵 洲,魏江波.基于颗粒流方法的滑坡破坏机理与强度分析[J].西安科技大学学报,2018,(04):611-619.[doi:10.13800/j.cnki.xakjdxxb.2018.0414 ]
 ZHAO Zhou,WEI Jiang-bo.Landslide failure mechanism and intensityanalysis based on PFC2D[J].Journal of Xi'an University of Science and Technology,2018,(04):611-619.[doi:10.13800/j.cnki.xakjdxxb.2018.0414 ]
点击复制

基于颗粒流方法的滑坡破坏机理与强度分析(/HTML)
分享到:

西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2018年04期
页码:
611-619
栏目:
出版日期:
2018-07-15

文章信息/Info

Title:
Landslide failure mechanism and intensityanalysis based on PFC2D
文章编号:
1672-9315(2018)04-0611-09
作者:
赵 洲魏江波
西安科技大学 地质与环境学院,陕西 西安 710054
Author(s):
ZHAO ZhouWEI Jiang-bo
(College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China)
关键词:
地质资源与地质工程 新府山滑坡 颗粒流方法 破坏机理 滑坡强度
Keywords:
geological resources and geological engineering Xinfushan landslide particle flow method(PFC2D) failure mechanism landslide intensity
分类号:
P 642
DOI:
10.13800/j.cnki.xakjdxxb.2018.0414
文献标志码:
A
摘要:
滑坡变形破坏机理与强度研究是滑坡风险评估的一项关键内容。针对颗粒流方法在滑坡变形破坏力学机理分析及滑坡强度定量化研究中存在的问题,以府谷县新府山滑坡为研究对象,采用野外调查、勘察、室内实验等方法,对新府山滑坡的工程地质特征进行了分析,在此基础上基于PFC2D数值方法构建了滑坡颗粒流数值模型,模拟了滑坡从变形失稳到运动终止的动态过程,从变形特征和力学特征2方面分别论述了滑坡的变形破坏机理,并选择速度、动能、冲击力指标对滑坡冲击破坏强度的变化特征进行了分析。结果表明,新府山滑坡的变形破坏机理表现为坡脚挤压—坡中牵引—坡顶拉张的力学过程; 滑坡运动特征表现为破坏的突发性与堆积的缓慢性; 以速度、动能指标为表征的滑坡强度在其破坏的初始阶段最高,然后逐渐变小; 以冲击力指标为表征的滑坡强度随坡脚距的增加而呈指数衰减特征。研究结果与滑坡变形破坏实际特征基本吻合,研究结论可为新府山滑坡防治提供参考,研究方法可为单体滑坡冲击破坏强度定量及对承灾体易损性定量评价研究提供借鉴。
Abstract:
Landslide deformation failure mechanism and intensity is a key content of landslide risk assessment.Aiming at the problems in mechanical analysis and quantitative evaluation of impact strength in landslide deformation and failure process,taking Xinfushan Landslide in Fugu County as the object,and using the methods of field investigation,exploration and laboratory experiments,the engineering geological characteristics of landslide was studied.The numerical model of Xinfushan landslide was constructed based on the Particle Flow method(PFC2D),and the dynamic process of landslide from deformation instability to movement termination was simulated.The deformation and failure mechanism of the landslide are revealed from the deformation characteristics and the mechanical characteristics,the variation characteristics of landslide intensity was analyzed using the indexes of velocity,kinetic energy and impact force.The results show that the failure mechanism of Xinfushan landslide is manifested by the mechanical process of compaction at the foot of the slope,the traction of the middle slope,and the extension of the top of the slope.The characteristics of landslide movement are sudden failure and slowness of accumulation.The index of velocity and kinetic energy reflects that the intensity of landslide is the highest in the initial stage of failure,and then decreases gradually.The landslide intensity represented by impact force index is exponentially attenuated with the increase of slope foot distance.The results are in good agreement with the actual landslide deformation and failure characteristics and can provide reference for the prevention and control of Xin Fu Shan landslide and for reference for the quantitative evaluation of the intensity of single landslide and its vulnerability.

参考文献/References:

[1] Cundall,P A,Strack O D L.A discrete numerical model for granular assemblies[J].Geotechnique,1979,29(1):47-65. [2] Cundall P A,Hart R D.Numerical modeling of discontinua[J].Engineering Computations,1992,9(2):101-113. [3] 周 健,王家全,曾 远,等.土坡稳定分析的颗粒流模拟[J].岩土力学,2009,30(1):86-90. ZHOU Jian,WANG Jia-quan,ZENG yuan,et al.Simulation of slope stability analysis by particle flow code[J].Rock and Soil Mechanics,2009,30(1):86-90. [4] 周 健,王家全,曾 远,等.颗粒流强度折减法和重力增加法的边坡安全系数研究[J].岩土力学,2009,30(6):1549-1554. ZHOU Jian,WANG Jia-quan,ZENG Yuan,et al.Slope safety factor by methods of particle flow code strength reduction and gravity increase[J].Rock and Soil Mechanics,2009,30(6):1549-1554. [5] 廖 彪.基于离散单元法的土质边坡稳定性分析[D].湘潭:湘潭大学,2010. LIAO Biao.Stability analysis of soil slope based on discrete element method[D].Xiangtan:Xiangtan University,2010. [6] 张 龙.鸡尾山高速远程滑坡运动过程模拟研究[D].武汉:中国地质大学,2012. ZHANG Long.Kinematic process simulation of high-speed long runout landslide in Jiweishan[D].Wuhan:China University of Geosciences,2012. [7] 马建全.黑方台灌区台缘黄土滑坡稳定性研究[D].长春:吉林大学,2012. MA Jian-quan.Stability analysis of loess landslide in loess tableland edge of Heifangtai irrigation area[D].Changchun:Jilin University,2012. [8] 廖静薇.基于颗粒流强度折减法的粉质粘土边坡稳定性分析[D].重庆:重庆大学,2014. LIAO Jing-wei.Slope stability analysis of silty clay particle flow based on strength reduction method[D].Chongqing:Chongqing University,2014. [9] Li N,Cheng Y M.Laboratory and 3D distinct element analysis of the failure mechanism of a slope under external surcharge[J].Nat.Hazards Earth Syst.,2015,15:35-43. [10]Valentino R,Barla G,Montrasio L.Experimental analys is and micromechanical modeling of dry granula flow and impacts in laboratory flume tests[J].Rock Mechanics and Rock Engineering,2008,41(1):153-177. [11]唐红梅,延兆奇,陈洪凯.三峡库区龚家方2号斜坡破坏过离散元数值模拟[J].重庆师范大学学报:自然科学版,2016,33(1):40-46. TANG Hong-mei,YAN Zhao-qi,CHEN Hong-kai.Numerical simulation on failure of Gongjiafang 2# bank slope of the Three Gorges based on discrete element method[J].Journal of Chongqing Normal University:Natural Science Edition,2016,33(1):40-46. [12]吴 越,刘东升,李明军.滑体下滑及冲击受灾体过程中的能耗规律模型试验[J].岩石力学与工程学报,2011,30(4):693-701. WU Yue,LIU Dong-sheng,LI Ming-jun.Landslide model experimental of energy dissipation principle in the sliding and impact process[J].Journal of Rock Mechanics and Engineering,2011,30(4):693-701. [13]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 Dong-sheng,LI Ming-jun.Impact energy calculation for rock slope and quantitative assessment of vulnerability for element at risk[J].Journal of Rock Mechanics and Engineering,2011,30(5):901-909. [14]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 Dong-sheng,LI Shuo-yang.Calculation model of impact energy based on interaction of landslide mass and disaster-affected bodies[J].Journal of Rock Mechanics and Engineering, 2012,31(S1):2636-2643. [15]吴 越,刘东升,陆 新,等.基于功-能关系的滑坡典型受灾体易损性评估模型[J].岩石力学与工程学报,2011,30(S1):2946-2953. WU Yue,LIU Dong-sheng,LU Xin,et al.A quantitative vulnerability assessment model for typical element at landslide risk based on work-energy transformation[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(S1):2946-2953. [16]张国明,张 彬,李亚玲,等.江外南各统滑坡滑带土力学参数的确定[J].西安科技大学学报,2009,29(4):470-473. ZHANG Guo-ming,ZHANG Bin,LI Ya-ling,et al.Determination of mechanical parameters on landslide soil of Jiangwainangetong landslide[J].Journal of Xi'an University of Science and Technology,2009,29(4):470-473. [17]SHI Chong,WANG Sheng-nian,LIU Lin,et al.Mesomechanical simulation of direct shear test on outwash deposits with granular discrete element method[J].J.Cent.South Univ,2013,20:1094-1102. [18]SHI Chong,LI De-jie,CHEN Kai-hua,et al.Failure mechanism and stability analysis of the Zhenggang landslide in Yunnan Province of China using 3D particle flow code simulation[J].Journal of Mountain Science,2016,13(5):891-905. [19]ZOU Zong-xing,TANG Hui-ming,XIONG Cheng-ren,et al.Kinetic characteristics of debris flows as exemplified by field investigations and discrete element simulation of the catastrophic Jiweishan rockslide[J].Geomorphology,2017,295:1-15. [20]LucScholtèsa,Frédéric V Donzé.A DEM analysis of step-path failure in jointed rock slopes[J].Comptes Rendus Mecanique,2015,334:155-165. [21]周 博,王华斌,赵文锋,等.黏性材料细观与宏观力学参数相关性研究[J].岩土力学,2012,33(10):3171-3178. ZHOU Bo,WANG Hua-bin,ZHAO Wen-feng,et al.Analysis of relationship between particle mesoscopic and macroscopic mechanical parameters of cohesive materials[J].Rock and Soil Mechanics,2012,33(10):3171-3178.

相似文献/References:

[1]张典荣,李 静,张 佳,等.新型多用钻孔测斜仪的研制及应用[J].西安科技大学学报,2018,(02):224.[doi:10.13800/j.cnki.xakjdxxb.2018.0208]
 ZHANG Dian-rong,LI Jing,ZHANG Jia,et al.Development and application of new type multi-usage borehole inclinomlter[J].Journal of Xi'an University of Science and Technology,2018,(04):224.[doi:10.13800/j.cnki.xakjdxxb.2018.0208]
[2]刘之的,张伟杰,孙家兴,等.大情字井油田青一段特低渗透储层物性主控因素[J].西安科技大学学报,2018,(01):99.[doi:10.13800/j.cnki.xakjdxxb.2018.0115]
 LIU Zhi-di,ZHANG Wei-jie,SUN Jia-xing,et al.Factors influencing the physical properties of reservoir in the Qing 1 section of Daqingzijing Oilfield[J].Journal of Xi'an University of Science and Technology,2018,(04):99.[doi:10.13800/j.cnki.xakjdxxb.2018.0115]
[3]赵谦平,高 潮,尹锦涛,等.鄂尔多斯盆地下寺湾地区山西组泥页岩生气特征[J].西安科技大学学报,2018,(01):108.[doi:10.13800/j.cnki.xakjdxxb.2018.0116]
 ZHAO Qian-ping,GAO Chao,YIN Jin-tao,et al.Hydrocarbon generation characteristics of source rocksin Shanxi Formation of Xiasiwan Area,Ordos Basin[J].Journal of Xi'an University of Science and Technology,2018,(04):108.[doi:10.13800/j.cnki.xakjdxxb.2018.0116]
[4]赵乐义,杨 军,李 涛,等.酒泉盆地营尔凹陷下白垩统中沟组源储一体成藏条件[J].西安科技大学学报,2018,(01):118.[doi:10.13800/j.cnki.xakjdxxb.2018.0117]
 ZHAO Le-yi,YANG Jun,LI Tao,et al.Accumulation condition in source rock and reservoir of LowerCretaceousZhonggou Formation in Ying'er Sag of Jiuquan Basin[J].Journal of Xi'an University of Science and Technology,2018,(04):118.[doi:10.13800/j.cnki.xakjdxxb.2018.0117]
[5]曹 跃,刘延哲,段昕婷,等.定边地区延长组下部储层的沉积地质意义[J].西安科技大学学报,2018,(01):137.[doi:10.13800/j.cnki.xakjdxxb.2018.0119]
 CAO Yue,LIU Yan-zhe,DUAN Xin-ting,et al.Sedimentary geological significance of reservoir in the Lower Member of Yanchang Formation in Dingbian Area[J].Journal of Xi'an University of Science and Technology,2018,(04):137.[doi:10.13800/j.cnki.xakjdxxb.2018.0119]
[6]张 科,方 勇,陈全红,等.贝克盆地卫星重力场特征与构造单元划分[J].西安科技大学学报,2018,(01):145.[doi:10.13800/j.cnki.xakjdxxb.2018.0120]
 ZHANG Ke,FANG Yong,CHEN Quan-hong,et al.Satellite gravity field and the division of tectonic units of the Biak Basin,Indonesia[J].Journal of Xi'an University of Science and Technology,2018,(04):145.[doi:10.13800/j.cnki.xakjdxxb.2018.0120]
[7]于 波.鄂尔多斯盆地上古生界致密砂岩储层微观孔隙特征[J].西安科技大学学报,2018,(01):150.[doi:10.13800/j.cnki.xakjdxxb.2018.0121]
 YU Bo.Micro-characteristics of Upper Paleozoictight reservoir of Ordos Basin[J].Journal of Xi'an University of Science and Technology,2018,(04):150.[doi:10.13800/j.cnki.xakjdxxb.2018.0121]
[8]魏繁荣,张志东,吴向阳,等.陕北安塞地区延长组长8段裂缝发育特征[J].西安科技大学学报,2018,(06):975.[doi:10.13800/j.cnki.xakjdxxb.2018.0614]
 WEI Fan-rong,ZHANG Zhi-dong,WU Xiang-yang,et al.Development characteristics of fractures of Chang 8 member in Yanchang Formation in Ansai Area,North Shaanxi[J].Journal of Xi'an University of Science and Technology,2018,(04):975.[doi:10.13800/j.cnki.xakjdxxb.2018.0614]
[9]吴辰泓,张丽霞,高 潮.下寺湾地区延长组陆相页岩孔隙特征及影响因素[J].西安科技大学学报,2018,(06):990.[doi:10.13800/j.cnki.xakjdxxb.2018.0616]
 WU Chen-hong,ZHANG Li-xia,GAO Chao.Pore characteristics and influential factors on lacustrine shale in Yanchang Formation,Xiasiwan Area[J].Journal of Xi'an University of Science and Technology,2018,(04):990.[doi:10.13800/j.cnki.xakjdxxb.2018.0616]
[10]柳 宁,赵晓光,解海军,等.榆神府地区煤炭开采对地下水资源的影响[J].西安科技大学学报,2019,(01):71.[doi:10.13800/j.cnki.xakjdxxb.2019.0111 ]
 LIU Ning,ZHAO Xiao-guang,XIE Haijun,et al.Influence of coal mining on groundwater resources in Yushenfu Area[J].Journal of Xi'an University of Science and Technology,2019,(04):71.[doi:10.13800/j.cnki.xakjdxxb.2019.0111 ]

备注/Memo

备注/Memo:
收稿日期:2016-12-10 责任编辑:李克永
基金项目:国家自然科学基金(41302276); 西安科技大学博士(后)启动金(2015QDJ085); 国土资源部黄土地质灾害重点实验室开放基金(KLGLAMLR201603)
通信作者:赵 洲(1978-),男,宁夏隆德人,博士,副教授,E-mail:xa5583003@163.com
更新日期/Last Update: 2018-08-29