方宏伟,吴建勋,侯振坤
FANG Hongwei,WU Jianxun,HOU Zhenkun

• 1:吉林建筑大学测绘与勘察学院
• 2:东北电力大学建筑工程学院
• 3:华东电力设计院
• 4:广州市建筑科学研究院有限公司

摘要(Abstract)：

基于滑移线场理论(SLFT),提出了一种边坡双折减系数强度折减法失稳判据:当由滑移线场理论计算得到的极限状态下的边坡坡面(简称"极限稳定坡面")与原坡面相交于坡脚时,判断边坡处于极限状态。基于提出的失稳判据构建了双折减系数倒数空间的临界曲线,并推导了整体安全系数计算公式。边坡算例计算结果表明:初始点和临界曲线的3种相对位置关系(点在曲线上方,点属于曲线,点在曲线下方)对应3类边坡整体安全系数(FS>1,FS=1,FS<1),整体安全系数计算结果与边坡状态相符合,确定的临界滑裂面形状以及在边坡中的位置都与已有结论一致。提出的失稳判据适用于计算配套系数和整体安全系数,实现了失稳判据的客观标准定量化。
Based on the slip line field theory(SLFT), a new instability criterion of strength reduction method with double reduction factors for homogeneous slopes was proposed. It is judged that the slope is in the limit equilibrium state when the slope contour under limit equilibrium state(abbreviated as the critical slope contour) calculated by the SLFT intersects with the slope line at the toe. The critical curve was constructed in the plane of the inverse of the double reduction factors, and the comprehensive safety factor was derived. The slope calculation results show that three relative position relationships between the initial point and the critical curve, i.e., the point is above, on, or below the critical curve corresponding to three types of safety factors, i.e., FS>1, FS=1 or FS<1. The proposed instability criterion is suitable for calculation of the reduction proportionality factor and the comprehensive safety factor, and realizes the objective quantification of the instability criterion.

关键词(KeyWords)： 边坡稳定性;双折减系数强度折减法;滑移线场理论;失稳判据;相对位置关系
slope stability;double strength reduction method;slip line field theory;instability criterion;relative position relationship

Abstract:

Keywords:

基金项目(Foundation): 吉林省教育厅“十三五”科学技术研究项目(JJKH20180450KJ)~~

作者(Author): 方宏伟,吴建勋,侯振坤
FANG Hongwei,WU Jianxun,HOU Zhenkun

参考文献(References)：

• [1]郑颖人.岩土材料屈服与破坏及边(滑)坡稳定分析方法研讨“三峡库区地质灾害专题研讨会”交流讨论综述[J].岩石力学与工程学报，2007,26(4):649–661.ZHENG Yingren. Discussion on yield and failure of geomaterials and stability analysis methods of slope/landslide-communion and discussion summary of special topic forum on geologic disasters in the three gorges project region[J]. Chinese Journal of Rock Mechanics and Engineering,2007,26(4):649–661.
• [2]曹云，肖武.基于强度折减和容重增加法的三维边坡稳定性分析[J].煤田地质与勘探，2010,38(3):46–50.CAO Yun,XIAO Wu. Application of strength reduction and gravity increase method in three dimensional slope stability analysis[J]. Coal Geology&Exploration,2010,38(3):46–50.
• [3]唐芬，郑颖人.边坡渐进破坏双折减系数法的机理分析[J].地下空间与工程学报，2008,4(3):436–441.TANG Fen,ZHENG Yingren. Mechanism analysis on dual reduction factors about the progressive failure of slope[J]. Chinese Journal of Underground Space and Engineering,2008,4(3):436–441.
• [4] SUO Yaohong. Double reduction factors approach to the stability of side slopes[J]. Communications in Computer and Information Science,2010,106(1):31-39.
• [5]袁维，李小春，王伟，等.一种双折减系数的强度折减法研究[J].岩土力学，2016,37(8):2222–2230.YUAN Wei,LI Xiaochun,WANG Wei,et al. Study on strength reduction method based on double reduction parameters[J]. Rock and Soil Mechanics,2016,37(8):2222–2230.
• [6]赵炼恒，曹景源，唐高朋，等.基于双强度折减策略的边坡稳定性分析方法探讨[J].岩土力学，2014,35(10):2977–2984.ZHAO Lianheng, CAO Jingyuan, TANG Gaopeng, et al.Discussion on slope stability analysis with double strength reduction technique[J]. Rock and Soil Mechanics,2014,35(10):2977–2984.
• [7] BAI Bing,YUAN Wei,LI Xiaochun. A new double reduction method for slope stability analysis[J]. Journal of Central South University,2014,21(3):1158–1164.
• [8] HE Wangying,GUO Defa,WANG Qing. Analysis of dam slope stability by double safety factors and dynamic local strength reduction method[J]. International Journal of Modelling Identification&Control,2015,23(4):355–361.
• [9]白冰，袁维，石露，等.一种双折减法与经典强度折减法的关系[J].岩土力学，2015,36(5):1275–1281.BAI Bing,YUAN Wei,SHI Lu,et al. Comparing a new double reduction method to classic strength reduction method for slope stability analysis[J]. Rock and Soil Mechanics,2015,36(5):1275–1281.
• [10] ISAKOV A,MORYACHKOV Y. Estimation of slope stability using two-parameter criterion of stability[J]. International Journal of Geo-mechanics,2014,14:1–3.
• [11] YUAN Wei,BAI Bing,LI Xiaochun,et al. A strength reduction method based on double reduction parameters and its application[J]. Journal of Central South University,2013,20(9):2555–2562.
• [12] JIANG Xiaoyong,WANG Zegen,LIU Lianyong,et al. The determination of reduction ratio factor in homogeneous soil-slope with finite element double strength reduction method[J]. The Open Civil Engineering Journal,2013,7(1):205–209.
• [13]唐芬，郑颖人，赵尚毅.土坡渐进破坏的双安全系数讨论[J].岩石力学与工程学报，2007,26(7):1402–1407.TANG Fen,ZHENG Yingren,ZHAO Shangyi. Discussion on two safety factors for progressive failure of soil slope[J]. Chinese Journal of Rock Mechanics and Engineering,2007,26(7):1402–1407.
• [14] DENG Dongping,LI Liang,ZHAO Lianheng. Limit equilibrium method(LEM)of slope stability and calculation of comprehensive factor of safety with double strength-reduction technique[J].Journal of Mountain Science,2017,14(11):2311–2324.
• [15] WU Yifeng,WANG Zegen. Stability analysis of unsaturated swelling soil slope with double strength reduction method[J].Electronic Journal of Geo-technical Engineering,2014,19:8965–8975.
• [16] SOKOLOVSKI?V V. Statics of granular media[M]. Oxford,U.K:Pergamon Press,1965.
• [17]陈震.散体极限平衡理论基础[M].北京：水利电力出版社，1987.
• [18]方宏伟，李长洪，李波.均质边坡稳定性极限曲线法[J].岩土力学，2014,35(增刊1):156–164.FANG Hongwei,LI Changhong,LI Bo. Limit curve method of homogeneous slope stability[J]. Rock and Soil Mechanics,2014,35(S1):156–164.
• [19]方宏伟.边坡稳定性极限曲线法[M].北京：科学出版社，2017.
• [20]朱彦鹏，杨晓宇，马孝瑞，等.边坡稳定性分析双折减法的几个问题[J].岩土力学，2018,39(1):331–338.ZHU Yanpeng,YANG Xiaoyu,MA Xiaorui,et al. Several questions of double reduction method for slope stability analysis[J]. Rock and Soil Mechanics,2018,39(1):331–338.
• [21] TANG Gaopeng,ZHAO Lianheng,LI Liang,et al. Stability design charts for homogeneous slopes under typical conditions based on the double shear strength reduction technique[J]. Arabian Journal of Geosciences,2017,10(13):280–296.

文章评论(Comment)：