[1]王念秦,张 宁,段 钊.泾阳南塬黄土滑坡冲击阶地易侵蚀层过程模拟[J].西安科技大学学报,2020,(02):244-252.
 WANG Nian-qin,ZHANG Ning,DUAN Zhao.Impacting pocess simulation of loess landslides on the easily-eroded terrace layers at south Jingyang plateau[J].Journal of Xi'an University of Science and Technology,2020,(02):244-252.
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2020年02期
页码:
244-252
栏目:
出版日期:
2020-03-30

文章信息/Info

Title:
Impacting pocess simulation of loess landslides on the easily-eroded terrace layers at south Jingyang plateau
文章编号:
1672-9315(2020)02-0244-09
作者:
王念秦张 宁段 钊
(西安科技大学 地质与环境学院,陕西 西安 710054)
Author(s):
WANG Nian-qinZHANG NingDUAN Zhao
(College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China)
关键词:
黄土滑坡 颗粒流 泾阳南塬 滑坡运动
Keywords:
loess landslide PFC Jingyang plateau landslide movement
分类号:
P 694
文献标志码:
A
摘要:
为探讨泾阳南塬地区黄土滑坡的高速远程的运动特征以及在运动过程中对阶地易侵蚀基层破坏迹象的产生机理。以泾阳南塬西庙店滑坡为研究对象,通过野外调查、勘探查明其运动特征,运用颗粒流离散元法模拟滑坡运动过程、机理。结果表明:滑坡运动过程中,滑体对阶地易侵蚀基层的冲击刮铲作用显著,宏观上表现为滑坡前缘地层隆起与逆冲剪断。滑坡滑动产生的振动作用使阶地粉土发生液化,液化后的粉土在超孔隙水压力作用下沿上覆土体导水通道涌出,形成显著的“涌砂”现象。滑坡运动全过程历时84 s,滑体颗粒最大运动速度36.2 m/s,最大运动距离253.2 m,具有典型的“高速”、“远程”特征。分析得到2点结论:①泾阳南塬典型高速远程黄土滑坡运动过程可分为3个阶段,即,冲击置换的加速阶段(0~2.9 s)、滑覆铲刮的减速阶段(2.9~5.7s)与堆积推覆的慢速波动阶段(5.7~84 s); ②滑体速度场变化特征明显,也可划分为3个阶段,即,加速阶段(0~2.9 s)、减速阶段(2.9~5.7 s)以及慢速波动阶段(5.7~84 s)。
Abstract:
In order to explorethe characteristics of high-speed and long-runout motion and the mechanism of the obvious signs of damage to the easily-eroded terrace layers in the course of movement in south Jingyang plateau,this paper,takingXimiaodian landslide in south Jingyang plateau as the research object,examines its motion characteristicsthrough the investigation and exploration in the field,and simulates the process of landslide motion by means of particle flow code(PFC).The results show that:in the sliding process,the impact and shovel scraping action of the sliding body on the easily-eroded terrace layers is significant,and the macroscopic manifestation is the uplift of the formation at the leading edge of landslide and the thrust shear.The vibration caused by landslide sliding makes the silty soil in the terrace liquefied.And the liquefied silty soil gushes out along the water channel of the overlying soil under the action of excess pore water pressure,forming a significant phenomenon of “sand gushing”.The whole process of Ximiaodian landslide lasts for 84 s,and the maximum movement speed of the sliding particles is 36.2 m/s,and the maximum movement distance is 253.2 m,which is typical of “high speed” and “long distance”.Finally,two conclusions are drawn:the typical high-speed and long-runout loess landslide movement process in south Jingyang plateau can be divided into three stages,namely,the acceleration stage of impact and replacement(0~2.9 s),the deceleration stage of sliding cover and shovel scraping(2.9~5.7 s)as well as the slow fluctuation stage of accumulation and nappe(5.7~84 s).According to the speed field characteristics of the sliding body,the sliding process can be divided into the acceleration stage(0~2.9 s),the deceleration stage(2.9~5.7 s)and the slow fluctuation stage(5.7~84 s).

参考文献/References:

[1] 雷祥义.陕西泾阳南塬黄土滑坡灾害与引水灌溉的关系[J].工程地质学报,1995,6(1):56-64. LEI Xiang-yi.The hazards of loess landslides in the southern tableland of Jingyang county,Shaanxi and their relationship with the channel water into fields[J].Journal of Engineering Geology,1995,6(1):56-64. [2]彭建兵,段 钊.听黄土粒儿说滑坡[J].自然杂志,2018,40(4):285-289. PENG Jian-bing,DUAN Zhao.Landslides in the words of little loess-grain[J].Chinese Journal of Nature,2018,40(4):285-289. [3]Hsu K J.Catastrophic debris streams(sturzstroms)generated by rockfalls[J].Geological Society of America Bulletin,1975,86(2):129-140. [4]Nicoletti P G,Valvo M S.Geomorphic controls of the shape and mobility of rock avalanches[J].Geological Society of America Bulletin,1991,103(10):1365-1373. [5]Kilburn C R J,Sorensen S A.Runout lengths of sturzstroms:the control of initial conditions and of fragment dynamics[J].Journal of Geophysical Research,1998,103(17):877-844. [6]Legros F.The mobility of long runout landslides[J].Engineering Geology,2002,63(3):301-331. [7]许 领,戴福初,闵 弘,等.泾阳南塬黄土滑坡类型与发育特征[J].地球科学(中国地质大学学报),2010,35(1):155-160. XU Ling,DAI Fu-chu,MIN Hong,et al.Loess landslide types and topographic features at south Jingyang plateau,China[J].Earth Science(Journal of China University of Geosciences),2010,35(1):155-160. [8]樊成意,梁收运.黄土台缘滑坡滑距与滑体形态的关系分析[J].中国地质灾害与防治学报,2013,24(1):18-24. FAN Cheng-yi,LIANG Shou-yun.Relationship between sliding distance and sliding-body form of loess landslides on platform[J].The Chinese Journal of Geological Hazard and Control,2013,24(1):18-24. [9]杨 璠,常 维.陕西泾阳东风高速远程黄土滑坡运动过程的模拟[J].工程地质学报,2014,22(5):890-895. YANG Fan,CHANG Wei.Motion simulation of Rapid long run-out loess landslide at Dongfeng in Jingyang,Shaanxi[J].Journal of Engineering Geology,2014,22(5):890-895. [10]沈 伟,翟张辉,李同录,等.陕西泾河南岸大堡子高速远程黄土滑坡运动过程模拟[J].工程地质学报,2016,24(6):1309-1317. SHEN Wei,ZHAI Zhang-hui,LI Tong-lu,et al.Simulation of propagation process for the Dabaozi rapid long run-out loess landslide in the sounth bank of the Jinghe River[J].Journal of Engineering Geology,2016,24(6):1309-1317. [11]段 钊,彭建兵,王启耀.泾阳南塬黄土滑坡的运动规律与液化效应[J].水土保持通报,2016,36(3):46-49. DUAN Zhao,PENG Jian-bing,WANG Qi-yao.Motion law and liquefaction effect of loess landslides in south Jingyang plateau[J].Bulletin of Soil and Water Conservation,2016,36(3):46-49. [12]许 强,魏 勇,彭大雷,等.泾阳南塬蒋刘4#滑坡特征及成因机制[J].水文地质工程地质,2018,45(1):123-130+143. XU Qiang,WEI Yong,PENG Da-lei,et al.Characteristics and failure mechanism of the Jiangliu 4# landslide in the southern tableland in Jingyang County[J].Hydrogeology & Engineering Geology,2018,45(1):123-130+143. [13]马鹏辉,彭建兵,李同录,等.陕西泾阳“3·8”蒋刘黄土滑坡成因及运动特征分析[J].工程地质学报,2018,26(3):663-672. MA Peng-hui,PENG Jian-bing,LI Tong-lu,et al.Forming mechanism and motion characteristics of the“3·8”Jiangliu loess landslide in Jingyang County of Shaanxi Province[J].Journal of Engineering Geology,2018,26(3):663-672. [14]金艳丽,戴褔初.灌溉诱发黄土滑坡机理研究[J].岩土工程学报,2007,29(10):1493-1499. JIN Yan-li,DAI Fu-chu.The mechanism of irrigation-induced landslides of loess[J].Chinese Journal of Geotechnical Engineering,2007,29(10):1493-1499. [15]杨炳强.泾阳南塬河滩村黄土滑坡的特征及致灾机理研究[D].西安:长安大学,2015. YANG Bing-qiang.Study on the characteristics and disaster mechanism of loess landslides of Hetan Village at south Jingyang plateau[D].Xi'an:Chang'an University,2015. [16]Zhou J W,Cui P,Hao M H.Comprehensive analyses of the initiation and entrainment processes of the 2000 Yigong catastrophic landslide in Tibet,China[J].Landslides,2016,13(1):39-54. [17]许 领,戴福初.泾阳南塬黄土滑坡特征参数统计分析[J].水文地质工程地质,2008,35(5):28-32. XU Ling,DAI Fu-chu.Statistical analysis of the characteristic parameters of loess landslides at the south Jingyang plateau[J].Journal of Engineering Geology,2008,35(5):28-32. [18]段 钊,李文可,王启耀.泾河下游台塬区黄土滑坡类型与时空分布规律[J].西安科技大学学报,2015,35(3):369-375. DUAN Zhao,LI Wen-ke,WANG Qi-yao.Types and spatial-temporal distribution of loess landslides in the south plateau of lower Jing river[J].Journal of Xi'an University of Science and Technology,2015,35(3):369-375. [19]李文可.泾阳南塬高速远程黄土滑坡运动机理研究[D].西安:西安科技大学,2015. LI Wen-ke.Study on the motion mechanism of high-speed remote loess landslides at south Jingyang plateau[D].Xi'an:Xi'an University of Science and Technology,2015. [20]杨 阳.黄土滑坡裂缝发育特征及其对滑坡孕灾模式的影响[D].西安:长安大学,2016. YANG Yang.Crack characteristics of loess landslides and its influence on landslides geo-hazard model[D].Xi'an:Chang'an University,2016. [21]张茂省,李同录.黄土滑坡诱发因素及其形成机理研究[J].工程地质学报,2011,19(4):530-540. ZHANG Mao-sheng,LI Tong-lu.Triggering factors and forming mechanism of loess landslides[J].Journal of Engineering Geology,2011,19(4):530-540. [22]张茂省,胡 炜,孙萍萍,等.黄土水敏性及水致黄土滑坡研究现状与展望[J].地球环境学报,2016,7(4):323-334. ZHANG Mao-sheng,HU Wei,SUN Ping-ping,et al.Advances and prospects of water sensitivity of loess and the induced loess landslides[J].Journal of Earth Environment,2016,7(4):323-334. [23]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,2018,38(4):611-619. ZHAO Zhou,WEI Jiang-bo.Landslide failure mechanism and intensity analysis based on PFC2D[J].Journal of Xi'an University of Science and Technology,2018,38(4):611-619. [24]张 龙,唐辉明,熊承仁,等.鸡尾山高速远程滑坡运动过程PFC3D模拟[J].岩石力学与工程学报,2012,31(1):2601-2611. ZHANG Long,TANG Hui-ming,XIONG Cheng-ren,et al.Movement process simulation of high-speed long-distanceJiweishan landslides with PFC3D[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(1):2601-2611. [25]周 剑,张路青,戴福初,等.基于黏结颗粒模型某滑坡土石混合体直剪试验数值模拟[J].岩石力学与工程学报,2013,32(1):2650-2659. ZHOU Jian,ZHANG Lu-qing,DAI Fu-chu,et al.Numerical simulation of direct shear tests for rock and soil mixture in a landslide based on bonded-particle model[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(1):2650-2659. [26]刘 蕾,陈 亮,崔振华,等.逆层岩质边坡地震动力破坏过程FLAC/PFC2D耦合数值模拟分析[J].工程地质学报,2014,22(6):1257-1262. LIU Lei,CHEN Liang,CUI Zhen-hua,et al.Flac/PFC2D hybrid simulation for seismically induced failure process of toppling rock slope[J].Journal of Engineering Geology,2014,22(6):1257-1262. [27]Xu L,Dai F C,Tham L G,et al.Landslides in a loess platform,North-West China[J].Landslides,2014,11(6):993-1005. [28]Xu L,Dai F C,Tham L G,et al.Landslides in the transitional slopes between a loess platform and river terrace,Northwest China[J].Environmental & Engineering Geoscience,2011(3):267-279. [29]郑志勇.黄土滑坡的形成机理[J].西安科技大学学报,2008,28(4):694-697. ZHENG Zhi-yong.Analysis on the formative mechanism of the loess landslides in Tongchuan[J].Journal of Xi'an University of Science and Technology,2008,28(4):694-697. [30]Peng J B,Ma P H,Wang Q Y,et al.Interaction between landsliding materials and the underlying erodible bed in a loess flowslide[J].Engineering Geology,2018,234(4):38-49.

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备注/Memo

备注/Memo:
收稿日期:2019-11-11 责任编辑:李克永
基金项目:国家自然科学基金(41702298,41572287); 陕西省自然科学基础研究计划(2017JQ4020); 陕西省教育厅专项科研计划项目(17JK0515)
通信作者:段 钊(1985-),男,陕西西安人,副教授,E-mail:landsliders@163.com
更新日期/Last Update: 2020-03-30