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基于强度衰减的Vajont滑坡运动特征非连续变形分析

张迎宾 董琰 陈岩岩 李小琴 富海鹰 程谦恭 魏江涛

张迎宾, 董琰, 陈岩岩, 李小琴, 富海鹰, 程谦恭, 魏江涛. 基于强度衰减的Vajont滑坡运动特征非连续变形分析[J]. 西南交通大学学报, 2021, 56(6): 1205-1213. doi: 10.3969/j.issn.0258-2724.20190913
引用本文: 张迎宾, 董琰, 陈岩岩, 李小琴, 富海鹰, 程谦恭, 魏江涛. 基于强度衰减的Vajont滑坡运动特征非连续变形分析[J]. 西南交通大学学报, 2021, 56(6): 1205-1213. doi: 10.3969/j.issn.0258-2724.20190913
ZHANG Yingbin, DONG Yan, CHEN Yanyan, LI Xiaoqin, FU Haiying, CHENG Qiangong, WEI Jiangtao. Effects of Strength Degradation of Sliding Mass on Movement of Vajont Landslide Numerical Simulation Based on Discontinuous Deformation Analysis[J]. Journal of Southwest Jiaotong University, 2021, 56(6): 1205-1213. doi: 10.3969/j.issn.0258-2724.20190913
Citation: ZHANG Yingbin, DONG Yan, CHEN Yanyan, LI Xiaoqin, FU Haiying, CHENG Qiangong, WEI Jiangtao. Effects of Strength Degradation of Sliding Mass on Movement of Vajont Landslide Numerical Simulation Based on Discontinuous Deformation Analysis[J]. Journal of Southwest Jiaotong University, 2021, 56(6): 1205-1213. doi: 10.3969/j.issn.0258-2724.20190913

基于强度衰减的Vajont滑坡运动特征非连续变形分析

doi: 10.3969/j.issn.0258-2724.20190913
基金项目: 国家自然科学基金(41977213);四川省科技基金(20GJHZ0232,2021YFS0321)
详细信息
    作者简介:

    张迎宾(1983—),男,教授,博士,研究方向为岩土地震工程,E-mail:yingbinz516@126.com

    通讯作者:

    富海鹰(1971—),女,教授,博士,研究方向为岩土地震工程,E-mail:hyfu@home.swjtu.edu.cn

  • 中图分类号: V221.3

Effects of Strength Degradation of Sliding Mass on Movement of Vajont Landslide Numerical Simulation Based on Discontinuous Deformation Analysis

  • 摘要:

    强度衰减是滑坡高速远程运动的重要原因,为了探明滑体强度衰减对滑坡运动能力的影响,以意大利Vajont高速滑坡为例,结合现场调查以及滑坡历史资料,基于岩土体剪切强度衰减理论,利用非连续变形分析(DDA)方法,探讨滑带强度衰减、滑体强度衰减及其共同作用对Vajont滑坡独特运动堆积特征的影响. 研究结果表明:滑带和滑体强度衰减的共同作用造成了Vajont滑坡显著高速运动和独特堆积特征,滑带强度衰减对滑坡运动速度起主导作用,当滑带强度衰减为15.8° 时,监测块体最大速度为5 m/s,当滑带强度衰减为6.9° 时,监测块体的最大速度为19 m/s;滑体强度衰减则对其高速持时具有显著影响,进而大幅提高滑坡运动的远程能力,当滑体强度为40.0° 时,监测块体水平最大位移为140 m,当滑体强度衰减为14.0° 时,监测块体水平最大位移为260 m;数值模拟过程中滑坡呈现出“一体化”运动特征,此特征可用来解释在实际滑坡堆积体高速远程运动过程中保持良好层序的原因.

     

  • 图 1  Vajont滑坡的位置

    Figure 1.  Location of the Vajont landslide

    图 2  Vajont峡谷两岸地层状况

    Figure 2.  Stratigraphic conditions on both sides of the Vajont Valley

    图 3  更新的Vajont峡谷两岸的地层序列(单位:m)

    Figure 3.  Updated lithostratigraphic columns on both sides of the Vajont Valley (unit: m)

    图 4  Vajont滑坡俯视图

    Figure 4.  Vertical view of the Vajont landslide

    图 5  滑坡堆积体及“飞来峰”的层序保持良好

    Figure 5.  Well-preserved strata sequence of klippe and slide deposit

    图 6  滑坡横截面示意

    Figure 6.  Schematic diagram of landslide section

    图 7  DDA计算模型(模型A)

    Figure 7.  Calculation model of DDA (model A)

    图 8  不同内摩擦角时最前缘块体 1 的位移时间曲线

    Figure 8.  Displacement-time history of the leading edge block 1 with different friction angles

    图 9  φs = 21.0°,Vajont 斜坡模型最终的状态

    Figure 9.  Ultimate state of the Vajont slope model with φs = 21.0°

    图 10  φs衰减至不同值时DDA模拟滑坡的运动全过程(φj = 30.0°)

    Figure 10.  Whole process of landslide motion by DDA simulation withthe sliding band strength φs decaying to different values(φj = 30.0°)

    图 11  φs(滑带强度)衰减至不同值时监测块体的位移及速度时程曲线(φj = 30.0°)

    Figure 11.  Time histories of velocity and displacement for monitored blocks with the sliding band strength φs decaying to different values (φj = 30.0°)

    图 12  不同φj时滑坡最终堆积形态(φs = 9.2°)

    Figure 12.  Ultimate deposit outline of models with the sliding mass strength φj decaying to different values (φs = 9.2°)

    图 13  φj(滑体强度)衰减至不同值时,监测块体的位移时程曲线(φs = 9.2°)

    Figure 13.  Displacement-time history of monitored blocks with the strength of slide mass φj decaying to different values (φs = 9.2°)

    表  1  Vajont滑坡的物理参数

    Table  1.   Physical parameters of the Vajont landslide

    项目 密度 ρ/
    ( kg•m−3
    重度 wy/
    ( kN•m−3
    杨氏模量 E/
    GPa
    泊松比 μ
    基岩 2 700 26.46 19 0.35
    滑体 2 700 26.46 15 0.31
    下载: 导出CSV

    表  2  节理参数

    Table  2.   Joint parameters

    位置黏聚力
    c /MPa
    内摩擦角
    φj /(°)
    抗拉强度/Pa
    岩体内部节理2.540(稳定时)
    30(破坏后)
    0
    下载: 导出CSV

    表  3  模型控制参数

    Table  3.   Model control parameters

    项目数值
    动力系数1.0
    单步允许最大位移率0.001
    时间步/s0.005
    弹簧刚度/( × 1011 N•mm−11
    超松弛系数1.3
    下载: 导出CSV

    表  4  滑带内摩擦角不同时滑坡的最大速度

    Table  4.   Maximum velocities of the landslide with different friction angles of sliding band

    φs/(°)最大速度/(m•s−1
    6.9 19.47
    9.2 16.74
    11.4 13.60
    15.8 5.05
    下载: 导出CSV
  • [1] MÜLLER-SALZBURG L. The rock slide in the Vajont valley[M]. Springer-Verlag, 1964: 148-212.
    [2] MÜLLER-SALZBURG L. The Vajont catastrophe-A personal review[J]. Engineering Geology, 1987, 24(1/2/3/4): 423-444.
    [3] HENDRON A J, PATTON F D. The Vaiont slide: a geotechnical analysis based on new geological observations of the failure surface: US army engineer waterways experiment station[R]. Washington D. C.: Department of the Army US Army Corps of Engineers, 1985.
    [4] SUPERCHI L, FLORIS M, GHIROTTI M, et al. Implementation of a geodatabase of published and unpublished data on the catastrophic Vaiont landslide[J]. Natural Hazards and Earth System Sciences, 2010, 10(4): 865-873.
    [5] ALONSO E E, PINYOL N M. Criteria for rapid sliding I: a review of Vaiont case[J]. Engineering Geology, 2010, 114(3/4): 198-210.
    [6] PARONUZZI P, BOLLA A. The prehistoric Vajont rockslide:an updated geological model[J]. Geomorphology, 2012, 169(10): 165-191.
    [7] CECINATO F, ZERVOS A, VEVEAKIS E. A thermo-mechanical model for the catastrophic collapse of large landslides[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2010, 35(14): 1507-1535.
    [8] HABIB P. Production of gaseous pore pressure during rock slides[J]. Rock Mechanics and Rock Engineering, 1975, 7(4): 193-197.
    [9] NONVEILLER E. The Vajont reservoir slope failure[J]. Engineering Geology, 1987, 24(87): 493-512.
    [10] VOIGHT B, FAUST C. Frictional heat and strength loss in some rapid landslides[J]. Geotechnique, 1982, 32(1): 43-54. doi: 10.1680/geot.1982.32.1.43
    [11] ARDOULAKIS I. Dynamic thermo-poro-mechanical analysis of catastrophic landslides[J]. Geotechnique, 2002, 52(3): 157-171.
    [12] PINYOL N M, ALONSO E E. Criteria for rapid sliding Ⅱ.: thermo-hydro-mechanical and scale effects in Vaiont case[J]. Engineering Geology, 2010, 114(3/4): 211-227.
    [13] HU W, HUANG R Q, MCSAVENEY M, et al. Superheated steam,hot CO2 and dynamic recrystallization from frictional heat jointly lubricated a giant landslide:field and experimental evidence[J]. Earth and Planetary Science Letters, 2019, 510: 85-93. doi: 10.1016/j.jpgl.2019.01.005
    [14] TIKA T E, HUTCHINSON J N. Ring shear tests on soil from the Vaiont landslide slip surface[J]. Geotechnique, 1999, 49(1): 59-74. doi: 10.1680/geot.1999.49.1.59
    [15] FERRI F, DI TORO G, HIROSE T, et al. Low-to high-velocity frictional properties of the clay-rich gouges from the slipping zone of the 1963 Vaiont slide,northern Italy[J]. Journal of Geophysical Research:Solid Earth, 2011, 116(B9): 1-17.
    [16] 崔圣华,裴向军,黄润秋,等. 大光包滑坡不连续地质特征及其工程地质意义[J]. 西南交通大学学报,2019,54(1): 65-76.

    CUI Shenghua, PEI Xiangjun, HUANG Runqiu, et al. Discontinuities and engineering geological significances of strong earthquake-induced daguangbao landslide[J]. Journal of Southwest Jiaotong University, 2019, 54(1): 65-76.
    [17] ZHANG Y B, CHEN G Q, ZHANG L, et al. Effects of near-fault seismic loadings on run-out of large-scale landslide:a case study[J]. Engineering Geology, 2013, 166(11): 216-236.
    [18] ZHANG Y B, WANG J M, XU Q, et al. DDA validation of the mobility of earthquake-induced landslides[J]. Engineering Geology, 2015, 194: 38-51. doi: 10.1016/j.enggeo.2014.08.024
    [19] ZHANG Y B, XU Q, CHEN G Q, et al. Extension of discontinuous deformation analysis and application in cohesive-frictional slope analysis[J]. International Journal of Rock Mechanics and Mining Sciences, 2014, 70(10): 533-545.
    [20] 邬爱清,丁秀丽,李会中,等. 非连续变形分析方法模拟千将坪滑坡启动与滑坡全过程[J]. 岩石力学与工程学报,2006,25(7): 1297-1303. doi: 10.3321/j.issn:1000-6915.2006.07.001

    WU Aiqing, DING Xiuli, LI Huizhong, et al. Numerical simulation of startup and whole failure process of Qianjiangping landslide using discontinuous deformation analysis method[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(7): 1297-1303. doi: 10.3321/j.issn:1000-6915.2006.07.001
    [21] 赵兴权,张迎宾,陈光齐,等. 非连续变形分析方法及其在灾害防治研究中的应用[J]. 西南交通大学学报,2016,51(2): 300-312. doi: 10.3969/j.issn.0258-2724.2016.02.010

    ZHAO Xingquan, ZHANG Yingbin, CHEN Guangqi, et al. Discontinuous deformation analysis method and its applications to disaster prevention[J]. Journal of Southwest Jiaotong University, 2016, 51(2): 300-312. doi: 10.3969/j.issn.0258-2724.2016.02.010
    [22] 刘军,李仲奎. 非连续变形分析(DDA)方法研究现状及发展趋势[J]. 岩石力学与工程学报,2004,23(5): 839-845. doi: 10.3321/j.issn:1000-6915.2004.05.024

    LIU Jun, LI Zhongkui. Current situation and development of DDA method[J]. Journal of Southwest Jiaotong University, 2004, 23(5): 839-845. doi: 10.3321/j.issn:1000-6915.2004.05.024
    [23] 姜清辉,周创兵. 岩土工程不连续变形分析计算中的若干问题[J]. 岩石力学与工程学报,2007,26(10): 2014-2026. doi: 10.3321/j.issn:1000-6915.2007.10.009

    JIANG Qinghui, ZHOU Chuangbing. Some issues in discontinuous deformation analysis for geotechnical engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(10): 2014-2026. doi: 10.3321/j.issn:1000-6915.2007.10.009
    [24] 陈岩岩. Vajont滑坡稳定性及高速运动特征的DDA模拟研究[D]. 成都: 西南交通大学, 2017.
    [25] SEMENZA E. Sintesi degli studi geologici sulla frana del Vajont dal 1959 al 1964[J]. Museo Tridentino di Scienze Naturali, 1965, 16: 1-52.
    [26] SEMENZA E, GHIROTTI M. History of the 1963 Vaiont slide:the importance of geological factors[J]. Bulletin of Engineering Geology and the Environment, 2000, 59(2): 87-97.
    [27] 张迎宾,余鹏程,赵兴权. 类梯形山体的地震动力响应分析[J]. 西南交通大学学报,2015,50(3): 435-441. doi: 10.3969/j.issn.0258-2724.2015.03.008

    ZHANG Yingbin, YU Pengcheng, ZHAO Xingquan. Analytical solutions of earthquake dynamic responses of trapezoid-like mountain[J]. Journal of Southwest Jiaotong University, 2015, 50(3): 435-441. doi: 10.3969/j.issn.0258-2724.2015.03.008
    [28] TROLLOPE D H. The Vajont slope failure[J]. Rock Mechanics and Rock Engineering, 1980, 13(2): 71-88.
    [29] BOON C W, HOULSBY G T, UTILI S. New insights into the 1963 Vajont slide using 2D and 3D distinct-element method analyses[J]. Geotechnique, 2014, 64(10): 800-816. doi: 10.1680/geot.14.P.041
    [30] SUPERCHI L. The Vajont rockslide: new techniques and traditional methods to re-evaluate the catastrophic event[D]. Padova: Padova University, 2012.
    [31] 郑颖人,赵尚毅,孔位学,等. 极限分析有限元法讲座——I岩土工程极限分析有限元法[J]. 岩土力学,2005,26(1): 163-168. doi: 10.3969/j.issn.1000-7598.2005.01.035

    ZHENG Yingren, ZHAO Shangyi, KONG Weixue, et al. Geotechnical engineering limit analysis using finite element method[J]. Rock and Soil Mechanics, 2005, 26(1): 163-168. doi: 10.3969/j.issn.1000-7598.2005.01.035
    [32] 郑颖人,赵尚毅. 有限元强度折减法在土坡与岩坡中的应用[J]. 岩石力学与工程学报,2004,23(19): 3381-3388. doi: 10.3321/j.issn:1000-6915.2004.19.029

    ZHENG Yingren, ZHAO Shangyi. Application of strength reduction fem in soil and rock slope[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(19): 3381-3388. doi: 10.3321/j.issn:1000-6915.2004.19.029
    [33] MACLAUGHLIN M M. Discontinuous deformation analysis of the kinematics of landslides[D]. Berkeley: University of California, 1997.
    [34] MACLAUGHLIN M, SITAR N, DOOLIN D, et al. Investigation of slope-stability kinematics using discontinuous deformation analysis[J]. International Journal of Rock Mechanics and Mining Sciences, 2001, 38(5): 753-762.
    [35] GHIROTTI M. Edoardo semenza: the importance of geological and geomorphological factors in the identification of the ancient Vaiont landslide[M]. Netherlands: Springer, 2006: 395-406.
    [36] BARTON N. The shear strength of rock and rock joints[J]. International Journal of Rock Mechanics and Mining Science & Geomechanics Abstracts, 1976, 13(9): 255-279.
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出版历程
  • 收稿日期:  2019-09-20
  • 修回日期:  2020-02-23
  • 网络出版日期:  2020-03-12
  • 刊出日期:  2020-03-12

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