暗穴环境下非饱和黄土边坡稳定性分析

李喜安 黄润秋 李荣建 李亮

李喜安, 黄润秋, 李荣建, 李亮. 2014: 暗穴环境下非饱和黄土边坡稳定性分析. 工程地质学报, 22(3): 366-371. doi: 10.13544/j.cnki.jeg.2014.03.003
引用本文: 李喜安, 黄润秋, 李荣建, 李亮. 2014: 暗穴环境下非饱和黄土边坡稳定性分析. 工程地质学报, 22(3): 366-371. doi: 10.13544/j.cnki.jeg.2014.03.003
LI Xi'an, HUANG Runqiu, LI Rongjian, LI Liang. 2014: FEM STABILITY ANALYSIS OF LOESS SLOPE WITH TUNNELING EROSION. JOURNAL OF ENGINEERING GEOLOGY, 22(3): 366-371. doi: 10.13544/j.cnki.jeg.2014.03.003
Citation: LI Xi'an, HUANG Runqiu, LI Rongjian, LI Liang. 2014: FEM STABILITY ANALYSIS OF LOESS SLOPE WITH TUNNELING EROSION. JOURNAL OF ENGINEERING GEOLOGY, 22(3): 366-371. doi: 10.13544/j.cnki.jeg.2014.03.003

暗穴环境下非饱和黄土边坡稳定性分析

doi: 10.13544/j.cnki.jeg.2014.03.003
基金项目: 

国家自然科学基金项目(41172255,11072193),中国博士后科学基金资助项目(20100481354)和地质灾害防治与地质环境保护国家重点实验室开放资金(SKLGP2012K028)资助

详细信息
    作者简介:

    李喜安,男,博士,教授,主要从事黄土地质灾害方面的教学与科研工作.Email:dclixa@chd.edu.cn

  • 中图分类号: TU43

FEM STABILITY ANALYSIS OF LOESS SLOPE WITH TUNNELING EROSION

  • 摘要: 黄土暗穴在水土流失方面作为一种独特的侵蚀方式,往往会威胁到建设在非饱和黄土层之上的公路边坡稳定性。基于考虑基质吸力的强度折减有限元程序,本文通过开展不同位置暗穴、单双暗穴和基质吸力赋存与丧失等条件下边坡稳定性的对比研究,着重对影响边坡稳定性的暗穴、基质吸力等因素进行了研究。研究结果表明,当暗穴接近地表时由于存在一定的减载效应而利于坡体的稳定,而当暗穴接近边坡坡脚时则成为黄土边坡稳定性的不利因素,在边坡底部存在的双暗穴明显削弱了边坡的稳定性,基质吸力使得非饱和黄土边坡安全系数增大,潜在滑动面变深,反之则使安全系数减小,潜在滑动面上移,基质吸力的丧失或减小以及暗穴的削弱作用使得潜在滑动面位置变化较大。
  • [1] Zienkiewicz O C, Humpheson C,Lewis R W.Associated and nonassociated visco-plasticity and plasticity in soil mechanics.Geotechnique, 1975, 25 (4): 691~689.

    [2] Ugai K.A method of calculation of total factor of safety of slopes by elasto-plastic FEM[J].Soils and Foundations, 1989, 29 (2): 190~195.

    [3] Griffths D V, Lane P A.Slope stability analysis by finite element[J].Geotechnique, 1999, 49 (3): 387~403.

    [4] Cai F,Ugai K,Wakai A,et al.Effects of horizontal drains on slope stability under rainfall by three-dimensional finite element analysis[J].Computers and Geotechnics, 1998, 23 (4): 255~275.

    [5] 李荣建, 于玉贞, 邓丽军, 等.非饱和土边坡稳定分析方法探讨[J].岩土力学, 2007, 28 (10): 2060~2064.Li Rongjian, Yu Yuzhen, Deng Lijun, et al.Discussion on stability analysis of unsaturated soil slopes.Rock and Soil Mechanics, 2007, 28 (10): 2060~2064.

    [6] Li R J, Yu Y Z, Deng L J, et al.Stability analysis of unsaturated soil slope by 3-D strength reduction FEM[J].ASCE,Geotechnical Special Publication, 2006, 148: 62~69.

    [7] 李荣建, 郑文,邵生俊,等,非饱和土边坡稳定分析中强度折减法与条分法的比较[J].西北农林科技大学学报(自然科学版), 2010, 38 (9): 207~214.Li Rongjian, Zheng Wen, Shao Shengjun, et al.Comparison analyses on stability of unsaturated soil slopes by strength reduction FEM and slice method.Journal of Northwest Agriculture and Forestry University(Nature Science Edition), 2010, 38 (9): 207~214.

    [8] 李荣建, 于玉贞,李广信.强度折减有限元法在非饱和土边坡稳定分析中的应用[J].水利水电技术, 2006, 37 (3): 42~45.Li Rongjian, Yu Yuzhen, Li Guangxin.Application of strength reduction FEM to analysis on stability of unsaturated soil slope.Water Resources and Hydropower Engineering, 2006, 37 (3): 42~45.

    [9] Li Xi'an.Modeling tests on rates of tunnel-erosion in loess[A].The 11th Congress of the International Association for Engineering Geology and the Environment[C].2010, 1287~1293.

    [10] 李喜安.黄土暗穴的成因及其公路工程灾害效应研究[D].西安:长安大学, 2004.Li Xi'an.On the Origin of Hidden Holes in Loess and Its Hazardous Effects on the Highway Engineering.Xi'an:Chang'an University, 2004.

    [11] 李喜安, 彭建兵,陈志新,等.黄土洞穴潜蚀地貌及其利弊综合分析[J].西安科技大学学报, 2009, 29 (1): 78~84.Li Xi'an,Peng Jianbing, Chen Zhixin, et al.Benefits and hazards of subground erosional gemorphy of loess tunnels.Journal of Xi'an University of Science and Technology, 2009, 29 (1): 78~84.

    [12] Cockfied W E,Buckham A F.Sink-hole erosion in the White Silts at Kamloops[J].Royal Society of Canada Transaction, 1946, 40 (4): 1~10.

    [13] Fletcher J E,Carroll, P H.Some properties of soils that are subject to piping in southern Arizona[A].Proceedings Soil Science Society of America[C].1948, 13:545~547.

    [14] Whipkey R Z.Subsurface stormflow from forested slopes[J].Hydrological Sciences Journal.1965, 10 (2):74~85.

    [15] Ternan J L,Ternan A,Elmes C,et al.Piping susceptibility and the role of hydro-geomorphic controls in pipe development in alluvial sediments central Spain[J].Zeitschrift Fur Geomorphologie.N.F, 1998, 42 (1): 75~87.

    [16] Jones A.Soil piping and stream channel initiation[J].Water Resources Research, 1971, 7 (3): 602~610.

    [17] Masannat Y M.Development of piping erosion conditions in the Benson Area, Arizona, USA[J].Quarterly Journal of Engineering Geology and Hydrogeology, 1980, 13 (11): 53~61.
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出版历程
  • 收稿日期:  2013-06-07
  • 修回日期:  2014-03-14
  • 刊出日期:  2014-06-25

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