基于动态和整体强度折减法的边坡稳定性分析

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摘要基于强度折减法的边坡稳定性评价只能获得静态单一的安全系数。为获得边坡渐进失稳过程中的稳定性状况，提出基于动态和整体强度折减法的边坡动态稳定性评价方法，利用动态强度折减法搜索出渐进扩展的滑动面，并结合整体强度折减法计算安全系数的优势，在边坡渐进失稳过程中计算动态安全系数，从而实现对边坡失稳全过程的分析和调控。首先，利用动态强度折减法确定出一系列扩展的滑动面，然后，在每一步折减中降低滑动面的强度参数，随后采用整体强度折减法计算此刻的安全系数。最后进行滑动面扩展–安全系数的对应分析，根据安全系数的动态变化规律对边坡进行稳定性评价和支护。两实例计算表明，动态强度折减法获得的滑动面与实际监测数据相吻合，合理反映边坡(滑坡)的变形破坏特征。利用动态和整体强度折减法的各自优势，获得边坡渐进失稳过程中的一系列动态安全系数，更利于边坡的稳定性判断及支护措施建议。相比于极限平衡法，动态强度折减法也更适合于非均质边坡的稳定性评价，能搜索出正确的潜在滑动面。

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关键词 ：边坡工程, 稳定性评价, 滑动面扩展, 强度折减法, 动态安全系数

Abstract：Slope stability evaluation based on strength reduction can only obtain static single safety factor. The dynamic evaluation method of slope stability is proposed based on dynamic and whole strength reduction methods in order to obtain the slope stability in the progressive failure process. At first，a series of expanded sliding surfaces are searched by using the dynamic strength reduction method(DSRM)；and then the strength parameters of the sliding surface are reduced in each reduction step. The corresponding safety factor of the slope is calculated by using whole strength reduction calculation. At last，the relationship of sliding surface propagation and the related safety factor is analyzed. Therefore，slope stability evaluation and support suggestion can be given according to the change rule of dynamic safety factors of slope. Two case studies show that sliding surface obtained by DSRM is consistent with in-situ monitoring data，reasonably reflecting the failure characteristics of slope or landslide. A series of dynamic safety factors are presented in the progressive failure process by using the advantages of DSRM and whole strength reduction method respectively. The DSRM benefits stability judgment and supporting measures suggestion of slope. Compared with the limit equilibrium method，the DSRM is more suitable for stability evaluation of the heterogeneous slopes；and it can search the potential sliding surface accurately.

Key words： slope engineering stability evaluation sliding surface propagation strength reduction method dynamic safety factor

收稿日期: 2013-05-02

引用本文:

陈国庆，黄润秋，石豫川，许强. 基于动态和整体强度折减法的边坡稳定性分析[J]. 岩石力学与工程学报, 2014, 33(2): 243-256.
CHEN Guoqing，HUANG Runqiu，SHI Yuchuan，XU Qiang. STABILITY ANALYSIS OF SLOPE BASED ON DYNAMIC AND WHOLE STRENGTH REDUCTION METHODS. , 2014, 33(2): 243-256.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2014/V33/I2/243

[1]	郑颖人. 岩土数值极限分析方法的发展与应用[J]. 岩石力学与工程学报，2012，31(7)：1 297-1 316.(ZHENG Yingren. Development and application of numerical limit analysis for geological materials[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(7)： 1 297-1 316.(in Chinese))
[2]	曹平，张科，汪亦显，等. 复杂边坡滑动面确定的联合搜索法[J]. 岩石力学与工程学报，2010，29(4)：814-820.(CAO Ping，ZHANG Ke，WANG Yixian，et al. Mixed search algorithm of critical slip surface of complex slope[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：814-820.(in Chinese))
[3]	刘晓宇，赵颖，刘洋，等. 土质边坡极限平衡状态及临界滑动面的判定方法[J]. 岩石力学与工程学报，2012，31(7)：1 369- 1 378.(LIU Xiaoyu，ZHAO Ying，LIU Yang，et al. Determination method of limit equilibrium state and critical slip surface of soil slope[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(7)：1 369-1 378.(in Chinese))
[4]	XIE M W. A simple Monte Carlo method for locating the three-dimensional critical slip surface of a slope[J]. Acta Geologica Sinica，2004，48(6)：1 258-1 266. " target="_blank">
[5]	李亮，邓东平，赵炼恒. 任意滑动面搜索新方法应用于三维复杂土坡稳定性分析[J]. 岩土工程学报，2011，33(4)：544-553.(LI Liang，DENG Dongping，ZHAO Lianheng. Application of new method of arbitrary sliding surface search to stability analysis of complex three-dimensional slopes[J]. Chinese Journal of Geotechnical Engineering，2011，33(4)：544-553.(in Chinese))
[6]	赵尚毅，郑颖人，时卫民，等. 用有限元强度折减法求边坡稳定安全系数[J]. 岩土工程学报，2002，24(3)：343-346.(ZHAO Shangyi， ZHENG Yingren，SHI Weimin，et al. Analysis of safety factor of slope stability by strength reduction FEM[J]. Chinese Journal of Geotechnical Engineering，2002，24(3)：343-346.(in Chinese))
[7]	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)：3 381-3 388.( ZHENG Yingren，ZHAO Shangyi. Application of strength reduction FEM to soil and rock slope[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(19)：3 381-3 388.(in Chinese)) " target="_blank">
[8]	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.(in Chinese))
[9]	年廷凯，万少石，蒋景彩，等. 库水位下降过程中土坡稳定强度折减有限元分析[J]. 岩土力学，2010，31(7)：2 264-2 270.(NIAN Tingkai，WAN Shaoshi，JIANG Jingcai，et al. Finite element analysis of slope stability under drawdown conditions by strength reduction technique[J]. Rock and Soil Mechanics，2010，31(7)：2 264-2 270.(in Chinese))
[10]	李春光，朱宇飞，刘丰，等. 基于下限原理有限元的强度折减法[J]. 岩土力学，2012，33(6)：1 816-1 821.(LI Chunguang，ZHU Yufei，LIU Feng，et al. Evaluation of strength reduction factor by lower bound limit analysis using finite element method[J]. Rock and Soil Mechanics，2012，33(6)：1 816-1 821.(in Chinese))
[11]	邓建辉，魏进兵，闵弘. 基于强度折减概念的滑坡稳定性三维分析方法(I)：滑带土抗剪强度参数反演分析[J]. 岩土力学，2003，24(6)：896-900.(DENG Jianhui，WEI Jinbing，MIN Hong. 3D stability analysis of landslides based on strength reduction(I)：back analysis for the shear strength of slip soils[J]. Rock and Soil Mechanics，2003，24(6)：896-900.(in Chinese))
[12]	EBERHARDT E. Twenty-ninth Canadian geotechnical colloquium：the role of advanced numerical methods and geotechnical field measurements in understanding complex deep-seated rock slope failure mechanisms[J]. Canadian Geotechnical Journal，2008，45(4)：484-510. " target="_blank">
[13]	唐春安，李连崇，李常文，等. 岩土工程稳定性分析RFPA强度折减法[J]. 岩石力学与工程学报，2006，25(8)：1 522-1 530.(TANG Chun′an，LI Lianchong，LI Changwen，et al. RFPA strength reduction method for stability analysis of geotechnical engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(8)：1 522- 1 530.(in Chinese)) " target="_blank">
[14]	陈力华，靳晓光. 有限元强度折减法中边坡三种失效判据的适用性研究[J]. 土木工程学报，2012，45(9)：136-146.(CHEN Lihua，JIN Xiaoguang. Study of the applicability of three criteria for slope instability using finite element strength reduction method[J]. China Civil Engineering Journal，2012，45(9)：136-146.(in Chinese))
[15]	梁庆国，李德武. 有限元强度折减法中边坡三种失效判据的适用性研究[J]. 岩土力学，2008，29(11)：3 053-3 058.(LIANG Qingguo，LI Dewu. Discussion on strength reduction FEM in geotechnical engineering[J]. Rock and Soil Mechanics，2008，29(11)：3 053-3 058. (in Chinese))
[16]	郑宏，李春光，李焯芬，等. 求解安全系数的有限元法[J]. 岩土工程学报，2002，24(5)：626-628.(ZHENG Hong，LI Chunguang，LEE C F，et al. Finite element method for solving the factor of safety[J]. Chinese Journal of Geotechnical Engineering，2002，24(5)：626-628.(in Chinese))
[17]	ZHENG H，LIU D F，LI C G. On the assessment of failure in slope stability analysis by the finite element method[J]. Rock Mechanics and Rock Engineering，2008，41(4)：629-639.
[18]	杨光华，张玉成，张有祥. 变模量弹塑性强度折减法及其在边坡稳定分析中的应用[J]. 岩石力学与工程学报，2009，28(7)：1 506-1 512.(YANG Guanghua，ZHANG Yucheng，ZHANG Youxiang. Variable modulus elastoplastic strength reduction method and its application to slope stability analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(7)：1 506-1 512.(in Chinese)) " target="_blank">
[19]	杨光华，钟志辉，张玉成，等. 用局部强度折减法进行边坡稳定性分析[J]. 岩土力学，2010，31(增2)：53-58.(YANG Guanghua，ZHONG Zhihui，ZHANG Yucheng，et al. Slope stability analysis by local strength reduction method[J]. Rock and Soil Mechanics，2010，31(Supp.2)：53-58.(in Chinese)) " target="_blank">
[20]	LEROUEIL S，LOCAT A，EBERHARDT E，et al. Progressive failure in natural and engineered slopes[C]// Proceedings of the 11th International and 2nd North American Symposium on Landslides. [S.L.]：CRC Press，2012：31-46. " target="_blank">
[21]	陈晓平，黄井武，尹赛华，等. 滑带土强度特性的试验研究[J]. 岩土力学，2011，32(11)：3 212-3 218.(CHEN Xiaoping，HUANG Jingwu，YIN Saihua，et al. Experimental study of strength property of slip zone soils[J]. Rock and Soil Mechanics，2011，32(11)：3 212-3 218.(in Chinese))
[22]	陈国庆，黄润秋，周辉，等. 边坡渐进破坏的动态强度折减法研究[J]. 岩土力学，2013，34(4)：1 140-1 146.(CHEN Guoqing，HUANG Runqiu，Zhou Hui，et al. Research on progressive failure for slope using dynamic strength reduction method[J]. Rock and Soil Mechanics，2013，34(4)：1 140-1 146.(in Chinese))
[23]	郑颖人，叶海林，黄润秋. 地震边坡破坏机制及其破裂面的分析探讨[J]. 岩石力学与工程学报，2009，28(8)：1 714-1 723.(ZHENG Yingren，YE Hailin，HUANG Runqiu. Analysis and discussion of failure mechanism and fracture surface of slope under earthquake[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(8)：1 714-1 723.(in Chinese))
[24]	范宣梅，许强，黄润秋，等. 丹巴县城后山滑坡锚固动态优化设计和信息化施工[J]. 岩石力学与工程学报，2007，26(增2)：4 139-4 146.(FAN Xuanmei，XU Qiang，HUANG Runqiu，et al. Dynamic optimal anchoring design and information construction of Danba landslide[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.2)：4 139-4 146.(in Chinese)) " target="_blank">
[25]	杨有成，李群，陈新泽，等. 对强度折减法若干问题的讨论[J]. 岩土力学，2008，29(4)：1 103-1 106.(YANG Youcheng，LI Qun，CHEN Xinze，et al. Discussion on strength reduction using FLAC[J]. Rock and Soil Mechanics，2008，29(4)：1 103-1 106.(in Chinese))
[26]	郑颖人，赵尚毅，李安洪，等. 有限元极限分析法及其在边坡中的应用[M]. 北京：人民交通出版社，2011：25.(ZHENG Yingren，ZHAO Shangyi，LI Anhong，et al. FEM limit analysis and its application to slope engineering[M]. Beijing：China Communication Press，2011：25.(in Chinese))