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加筋高边坡的稳定分析

介玉新, 秦晓艳, 金鑫, 徐文杰, 王恩志

介玉新, 秦晓艳, 金鑫, 徐文杰, 王恩志. 加筋高边坡的稳定分析[J]. 岩土工程学报, 2012, 34(4): 660-666.
引用本文: 介玉新, 秦晓艳, 金鑫, 徐文杰, 王恩志. 加筋高边坡的稳定分析[J]. 岩土工程学报, 2012, 34(4): 660-666.
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JIE Yu-xin, QIN Xiao-yan, JIN Xin, XU Wen-jie, WANG En-zhi. Stability of high reinforced soil slopes[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(4): 660-666.
Citation: JIE Yu-xin, QIN Xiao-yan, JIN Xin, XU Wen-jie, WANG En-zhi. Stability of high reinforced soil slopes[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(4): 660-666.
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加筋高边坡的稳定分析  English Version

  • 清华大学水沙科学与水利水电工程国家重点实验室，北京100084

详细信息
    作者简介:

    介玉新 (1970 – ),男，副教授，博士，主要从事土工数值分析、基础工程、土工合成材料等方面的教学和科研工作。

  • 中图分类号: TU457

Stability of high reinforced soil slopes

  • State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China

摘要

    摘要
  • 摘要: 采用强度折减法对两个高度分别为 60 m 和 40 m 的土工格栅加筋高边坡的设计断面进行稳定分析，综合考虑塑性区贯通、特征点位移突变、计算不收敛，以及土工格栅的容许抗拉强度等确定相应的安全系数。计算表明采用不同的破坏标准，强度折减法会得到不同的安全系数；如果筋材强度始终得到保证，单纯由土材料的强度损失诱发边坡失稳，这种情况对应的安全系数是比较高的。考虑筋材强度，边坡会在较小的折减系数下因为筋材强度不足而失稳。有限元法能够得到不同情况下各层筋材的受力情况，可以据此进行加筋力的分配，这是极限平衡法所不具备的。
    Abstract: The strength reduction method is employed to study the stability of two geogrid reinforced soil slopes. The heights of the slopes are 60 m and 40 m, respectively. Safety factors are calculated according to the criteria of run-through of plastic zone, displacement mutation of feature point, convergence of iteration and allowable tensile strength, respectively. The results show that different safety factors may be achieved in the light of different criteria for failure. Larger safety factor may be obtained if the strength of the reinforcement is high enough and the slope instability is merely induced by the reduction of soil strength. The slope may fail at lower reduction factor owing to the insufficient strength of reinforcement. The tensile stress in each layer of reinforcement can be obtained by means of the finite element method and be used to assign the reinforcement strength required, while the limit equilibrium method is not available in this case.
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    • 参考文献(11)
  • [1] 介玉新 . 加筋高 边坡及计算方法 [J]. 工程地质学报 , 2010, 18 ( 增刊 ): 263 – 267. (JIE Yu-xin. High reinforced slope and related computation method[J]. Journal of Engineering Geology, 2010, 18 (S0): 263 – 267. (in Chinese))
    [2] GRIFFITHS D V, LANE P A. Slope stability analysis by finite elements[J]. Géotechnique, 1999, 49 (3): 387 – 403.
    [3] 郑颖人 , 赵尚毅 , 宋雅坤 . 有限元强度折减法研究进展 [J]. 后勤工程学院学报 , 2005(3): 1 – 6. (ZHENG Ying-ren, ZHAO Shang-yi, SONG Ya-kun. Advance of study on the strength reduction finite element method[J]. Journal of Logistical Engineering University, 2005(3): 1 – 6. (in Chinese))
    [4] 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. (ZHENG Ying-ren, ZHAO Shang-yi. Application of strength reduction FEM in soil and rock slope[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23 (19): 3381 – 3388. (in Chinese))
    [5] 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 Shang-yi, ZHENG Ying-ren, ZHANG Yu-fang. Study on slope failure criterion in strength reduction finite element method[J]. Rock and Soil Mechanics, 2005, 26 (2): 332 – 336. (in Chinese))
    [6] 于玉贞 , 林鸿州 , 李荣建 , 等 . 非稳定渗流条件下非饱和土边坡稳定分析 [J]. 岩土力学 , 2008, 29 (11): 2892 – 2898. (YU Yu-zhen, LIN Hong-zhou, LI Rong-jian, et al. Stability analysis of unsaturated soil slope under transient seepage flow state[J]. Rock and Soil Mechanics, 2008, 29 (11): 2892 – 2898. (in Chinese))
    [7] 高文华 , RICHARD J Bathurst. 条形荷载作用下加筋土边坡稳定性分析 [J]. 岩石力学与工程学报 , 2007, 26 (2): 374 – 380. (GAO Wen-hua, RICHARD J Bathurst. Stability analysis of reinforced slope loaded by a strip footing[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26 (2): 374 – 380. (in Chinese))
    [8] 王 清 , 陆 新 . 用有限元强度折减法进行加筋土挡土墙稳定性分析 [J]. 后勤工程学院学报 , 2006(1): 63 – 66. (WANG Qing, LU Xin. Stability analysis on reinforced retaining wall by strength reduction of FEM[J]. Journal of Logistical Engineering University, 2006(1): 63 – 66. (in Chinese))
    [9] 葛修润 . 岩石疲劳破坏的变形控制律、岩土力学试验的实时 X 射线 CT 扫描和边坡坝基抗滑稳定分析的新方法 [J]. 岩土工程学报 , 2008, 30 (1): 1 – 20. (GE Xiu-run. Deformation control law of rock fatigue failure, real-time X-ray CT scan of geotechnical testing, and new method of stability analysis of slopes and dam foundations[J]. Chinese Journal of Geotechnical Engineering, 2008, 30 (1): 1 – 20. (in Chinese))
    [10] 介玉新 , 李广信 . 加筋土数值计算的等效附加应力法 [J]. 岩土工程学报 , 1999, 21 (5): 614 – 616. (JIE Yu-xin, LI Guang-xin. Equivalent additional stress method for numerical analysis of reinforced soil[J]. Chinese Journal of Geotechnical Engineering, 1999, 21 (5): 614 – 616. (in Chinese))
    [11] 介玉新 , 王乃东 , 李广信 . 加筋土计算中等效附加应力法的改进 [J]. 岩土力学 . 2007, 28 ( 增刊 ): 129 – 132. (JIE Yu-xin, WANG Nai-dong, LI Guang-xin. Modified equivalent additional stress method for numerical analysis of reinforced soil[J]. Rock and Soil Mechanics, 2007, 28 (S0): 129 – 132. (in Chinese))
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  • 发布日期:  2012-04-19

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