魏启炳¹,刘志彬¹,鲁洪强²,高俊启³
WEI Qibing¹, LIU Zhibin¹, LU Hongqiang², GAO Junqi³

• 1:东南大学交通学院岩土工程研究所，江苏 南京 210096
• 2:青岛市市政工程设计研究院有限责任公司，山东 青岛 266071
• 3:南京航空航天大学航空宇航学院，江苏 南京 210016

摘要(Abstract)：

针对青岛崂山路拓宽工程中高陡岩质边坡加固问题，选择典型（C区）坡体，建立数值分析模型，基于强度折减法采用三维快速拉格朗日法（FLAC^3D）对该边坡加固前后的稳定性进行了数值模拟。通过对计算边坡稳定性的3种失稳判据进行比较分析，选取特征点位移突变为失稳判据，确定了边坡加固前后安全系数的变化。基于现场实际监测数据，对加固后边坡的稳定状态和加固效果进行评价。对该边坡的数值分析及监测结果分析表明，边坡处于安全状态，加固工程取得了明显的效果。
In order to deal with the reinforcement effect of high and steep slope of Laoshan road of Qingdao, the typical slope (zone C) was selected for numerical analysis based on strength reduction method. The three dimensional fast Lagrangian analysis method (FLAC^3D) was used to analyze the slope stability before and after reinforcement. After the comparison of three types of instability judgment criteria during slope stability calculation, the sudden displacement change of characteristic position was finally chosen as the instability judgment criterion in this research due to its practicability. Then the safety factor of the slope before and after reinforcement was determined, which confirmed the design scheme of the reinforcement. Finally, the stability state of the studied slope and corresponding reinforcement effect were verified by long term field monitoring data. The result showed that the slope is in a stable state and slope reinforcement had obvious effect.

关键词(KeyWords)： 岩质边坡;强度折减法;FLAC^3D;稳定性评价;边坡锚固
rock slope;strength reduction method;FLAC^3D;stability evaluation;slope reinforcement

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 魏启炳¹,刘志彬¹,鲁洪强²,高俊启³
WEI Qibing¹, LIU Zhibin¹, LU Hongqiang², GAO Junqi³

DOI: 10.3969/j.issn.1001-1986.2017.02.018

参考文献(References)：

• [1] 方建瑞,朱合华,蔡永昌. 边坡稳定性研究方法与进展[J]. 地下空间与工程学报,2007,3(2):343-349. FANG Jianrui,ZHU Hehua,CAI Yongchang. Advancement and methods of the slope stability research[J]. Chinese Journal of Underground Space and Engineering,2007,3(2):343-349.
  [2] 陈祖煜. 土坡稳定分析通用条分法及其改进[J]. 岩土工程学报,1983,5(4):1-27. CHEN Zuyu. The generalized method of slice for slope stability analysis and its modifications[J]. Chinese Journal of Geotechnical Engineering,1983,5(4):1-27.
  [3] 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):1297-1316. ZHENG Yingren. Development and application of numerical limit analysis for geological materials[J]. Chinese Journal of Rock Mechanics and Engineering,2012,31(7):1297-1316.
  [4] ZIENKIEWICZ O C,HUMPHESON C,LEWIS R W. Associated and non-associated visco-plasticity and plasticity in soil mechanics[J]. Geotechnique,1975,25(4):671-689.
  [5] 郑颖人,赵尚毅,邓楚键,等. 有限元极限分析法发展及其在岩土工程中的应用[J]. 中国工程科学,2006,8(12):39-61. ZHENG Yingren,ZHAO Shangyi,DENG Chujian,et al. Development of finite element limit analysis method and its application in geotechnical engineering[J]. Engineering Sciences,2006,8(12):39-61.
  [6] DAWSON E M,ROTH W H,DRESCHER A. Slope stability analysis by strength reduction[J]. Geotechnique,1999,49(6):835-840.
  [7] 栾茂田,武亚军,年廷凯. 强度折减有限元法中边坡失稳的塑性区判据及其应用[J]. 防灾减灾工程学报,2003,23(3):1-8. LUAN Maotian,WU Yajun,NIAN Tingkai. A criterion for evaluating slope stability based on development of plastic zone by shear strength reduction FEM[J]. Journal of Disaster Prevention and Mitigation Engineering,2003,23(3):1-8.
  [8] 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,LI Zhuofen,et al. Finite element method for solving the factor of safety[J]. Chinese Journal of Geotechnical Engineering,2002,24(5):626-628.
  [9] GRIFFITHS D V,LANE P A. Slope stability analysis by finite elements[J]. Geotechnique,1999,49(3):387-403.
  [10] MANZARI M T,NOUR M A. Significance of soil dilatancy in slope stability analysis[J]. Journal of Geotechnical and Geoenvironmental Engineering,2000,126(1):75-80.
  [11] 宋二祥. 土工结构安全系数的有限元计算[J]. 岩土工程学报,1997,19(2):1-7. SONG Erxiang. Finite element analysis of factor for soil structures[J]. Chinese Journal of Geotechnical Engineering,1997,19(2):1-7.
  [12] 赵尚毅,郑颖人,张玉芳. 极限分析有限元法讲座——Ⅱ有限元强度折减法中边坡失稳的判据探讨[J]. 岩土力学,2005,26(2):332-336. ZHAO Shangyi,ZHENG Yingren,ZHANG Yufang. Study on slope failure criterion in strength reduction finite element method[J]. Rock and Soil Mechanics,2005,26(2):332-336.

文章评论(Comment)：