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越顶破坏模式下沉埋桩受荷段及沉埋段推力算法

闫玉平

闫玉平. 越顶破坏模式下沉埋桩受荷段及沉埋段推力算法[J]. 水文地质工程地质,2023,50(3): 76-84 doi:  10.16030/j.cnki.issn.1000-3665.202211007
引用本文: 闫玉平. 越顶破坏模式下沉埋桩受荷段及沉埋段推力算法[J]. 水文地质工程地质,2023,50(3): 76-84 doi:  10.16030/j.cnki.issn.1000-3665.202211007
YAN Yuping. Calculation method of thrust force of the embedded stabilizing piles under the overtop-sliding failure mode[J]. Hydrogeology & Engineering Geology, 2023, 50(3): 76-84 doi:  10.16030/j.cnki.issn.1000-3665.202211007
Citation: YAN Yuping. Calculation method of thrust force of the embedded stabilizing piles under the overtop-sliding failure mode[J]. Hydrogeology & Engineering Geology, 2023, 50(3): 76-84 doi:  10.16030/j.cnki.issn.1000-3665.202211007

越顶破坏模式下沉埋桩受荷段及沉埋段推力算法

doi: 10.16030/j.cnki.issn.1000-3665.202211007
基金项目: 国家自然科学基金项目(41831290)
详细信息
    作者简介:

    闫玉平(1989-),男,博士,工程师,主要从事铁路设计、边坡稳定性分析、边坡加固等方面的研究工作。E-mail:2420907827@qq.com

  • 中图分类号: P642.23

Calculation method of thrust force of the embedded stabilizing piles under the overtop-sliding failure mode

  • 摘要: 滑坡推力的确定对于抗滑桩设计极其重要,沉埋桩作为对传统抗滑桩的优化,其受荷段推力的研究目前主要借助于模型试验和数值模拟,缺乏深入的理论分析。为了建立沉埋桩后侧受荷段及桩顶沉埋段滑坡推力计算方法,针对沉埋桩加固的基岩-覆盖层式滑坡,基于潜在越顶破坏模式,由桩顶位置将越顶滑面分为顶部、底部两段,其中,顶部滑面上水平方向合力即为沉埋段推力,可由积分求得,底部滑面上各个方向的力求解方法与此类似;在此基础上,利用刚体极限平衡理论对底部滑面与桩受荷段所围滑体进行受力分析,进而可得受荷段推力计算公式。实例分析表明:理论算法所得沉埋段与受荷段推力值与FLAC3D结果非常接近,其中,受荷段推力、沉埋段推力、设桩位置处总推力随沉埋比的增大而分别非线性减小、增大、减小;沉埋比位于0~0.67范围内时,沉埋段与受荷段推力之比由0缓慢增大到0.30~0.50,随着沉埋比增大到0.8,该比值急剧增大到1.47~2.12;一般沉埋深度下,沉埋段推力小于受荷段推力。沉埋桩推力的理论研究对于桩体内力优化、沉埋深度确定具有重要的现实意义,将有助于该桩型的进一步推广应用。
  • 图  1  沉埋桩加固滑坡横截面示意图

    Figure  1.  Sketch map of the cross section of a landslide reinforced with embedded pile

    图  2  沉埋桩越顶破坏模式

    Figure  2.  Overtop-sliding failure mode of the embedded piles

    图  3  各块体受力分析模型

    Figure  3.  Mechanical analysis model of each typical rigid block

    图  4  沉埋桩加固宝成铁路沿线某滑坡横断面图

    Figure  4.  Cross section of a practical landslide reinforced with embedded stabilizing piles

    图  5  沉埋桩加固滑坡数值模型

    Figure  5.  Numerical model of the practical landslide reinforced with embedded pile

    图  6  数值模拟得到的临界滑动面

    Figure  6.  Critical slip surface obtained with the shear strength reduction method

    图  7  沉埋桩加固滑坡的水平应力云图

    Figure  7.  Contour of horizontal stress of the reinforced landslide using the embedded pile

    图  8  加固后坡体稳定系数随η的变化情况

    Figure  8.  Variation of stability coefficient of reinforced landslide with the embedded ratio

    图  9  受荷段及沉埋段推力随η的变化情况

    Figure  9.  Variation of the thrust behind the pile and the thrust in the submerged section with the embedded ratio

    图  10  设桩处总滑坡推力随η的变化情况

    Figure  10.  Variation of the total thrust at the section of pile position with the embedded ratio

    图  11  沉埋段、受荷段推力之比与η的关系曲线

    Figure  11.  Variation curve of thrust ratio of the submerged section and the loading section with the embedded ratio

    表  1  抗滑桩及坡体主要物理力学参数

    Table  1.   Main physical and mechanical parameters of the landslide and piles

    材料类型土体重度
    /(kN·m–3
    黏聚力
    /kPa
    内摩擦角
    /(°)
    弹性模量
    /MPa
    泊松比
    碎石土221120.6500.33
    大理岩2345037.06000.25
    抗滑桩2530 0000.22
    注:抗滑桩视为弹性体,故不考虑其黏聚力和内摩擦角。
    下载: 导出CSV
  • [1] ITO T,MATSUI T,HONG W P. Design method for stabilizing piles against landslide: One row of piles[J]. Soils and Foundations,1981,21(1):21 − 37. doi:  10.3208/sandf1972.21.21
    [2] RANDOLPH M F. The response of flexible piles to lateral loading[J]. Géotechnique,1981,31(2):247 − 259.
    [3] 常晓军,葛伟亚,于洋,等. 福建省永泰县东门旗山滑坡诱发机理与防治措施[J]. 吉林大学学报(地球科学版),2019,49(4):1063 − 1072. [CHANG Xiaojun,GE Weiya,YU Yang,et al. Mechanism and mitigation measures of Qishan landslide of Yongtai in Fujian Province[J]. Journal of Jilin University (Earth Science Edition),2019,49(4):1063 − 1072. (in Chinese with English abstract)
    [4] CHOW Y K. Analysis of piles used for slope stabilization[J]. International Journal for Numerical and Analytical Methods in Geomechanics,1996,20(9):635 − 646. doi:  10.1002/(SICI)1096-9853(199609)20:9<635::AID-NAG839>3.0.CO;2-X
    [5] HASSIOTIS S,CHAMEAU J L,GUNARATNE M. Design method for stabilization of slopes with piles[J]. Journal of Geotechnical and Geoenvironmental Engineering,1997,123(4):314 − 323. doi:  10.1061/(ASCE)1090-0241(1997)123:4(314)
    [6] 郑颖人, 雷文杰, 赵尚毅, 等. 抗滑桩设计中的两个问题[J]. 公路交通科技, 2005, 22(增刊1): 45 − 51

    ZHENG Yingren, LEI Wenjie, ZHAO Shangyi, et al. Two problems in design methods of anti-slide piles[J]. Journal of Highway and Transportation Research and Development, 2005, 22(Sup 1): 45 − 51. (in Chinese with English abstract)
    [7] 闫玉平,肖世国. 双排抗滑桩加固滑坡的前桩后侧推力算法[J]. 水文地质工程地质,2021,48(4):55 − 63. [YAN Yuping,XIAO Shiguo. A calculation method for thrust on the fore piles of double-row stabilizing piles used to reinforce landslides[J]. Hydrogeology & Engineering Geology,2021,48(4):55 − 63. (in Chinese with English abstract)
    [8] 王文沛,殷跃平,王立朝,等. 排水抗滑桩技术研究现状及展望[J]. 水文地质工程地质,2022,49(2):73 − 83. [WANG Wenpei,YIN Yueping,WANG Lichao,et al. Status and prospects of studies on anti-slide shaft technology[J]. Hydrogeology & Engineering Geology,2022,49(2):73 − 83. (in Chinese with English abstract)
    [9] 向俐蓉,陈伟志,郭在旭,等. 大型滑坡抗滑桩-桩板结构受力变形研究[J]. 水文地质工程地质,2021,48(2):125 − 131. [XIANG Lirong,CHEN Weizhi,GUO Zaixu,et al. A study of the deformation of anti-slide pile and pile-plate structure in large landslide[J]. Hydrogeology & Engineering Geology,2021,48(2):125 − 131. (in Chinese with English abstract)
    [10] 邓时容,肖世国. 嵌固段顶部拓宽型抗滑桩计算方法[J]. 中国地质灾害与防治学报,2022,33(4):84 − 91. [DENG Shirong,XIAO Shiguo. Calculation method of stabilizing piles with broadened top at the built-in section[J]. The Chinese Journal of Geological Hazard and Control,2022,33(4):84 − 91. (in Chinese with English abstract)
    [11] 陶波,佴磊,伍法权,等. 论静止侧压力对抗滑桩的作用[J]. 吉林大学学报(地球科学版),2006,36(5):837 − 840. [TAO Bo,NAI Lei,WU Faquan,et al. The effect imposed on anti-slide pile by the static lateral pressure[J]. Journal of Jilin University (Earth Science Edition),2006,36(5):837 − 840. (in Chinese with English abstract)
    [12] 肖世国. 考虑桩间土体抗滑作用的单排抗滑桩受力计算方法[J]. 中国地质灾害与防治学报,2020,31(1):89 − 94. [XIAO Shiguo. A calculation method for one row stabilizing piles considering resistance of soil between adjacent piles[J]. The Chinese Journal of Geological Hazard and Control,2020,31(1):89 − 94. (in Chinese with English abstract)
    [13] POULOS H G. Design of reinforcing piles to increase slope stability[J]. Canadian Geotechnical Journal,1995,32(5):808 − 818. doi:  10.1139/t95-078
    [14] 钟昌茂,邱恩喜,魏永幸,等. 基于桩体抗剪强度的复合地基路堤稳定性分析方法[J]. 水文地质工程地质,2020,47(5):100 − 107. [ZHONG Changmao,QIU Enxi,WEI Yongxing,et al. Stability analysis method for the composite foundation embankment based on pile shear strength[J]. Hydrogeology & Engineering Geology,2020,47(5):100 − 107. (in Chinese with English abstract)
    [15] 任青阳,赵梦园,谢忠伟,等. 抗滑桩应变特征与内力非线性研究[J]. 水文地质工程地质,2021,48(2):114 − 124. [REN Qingyang,ZHAO Mengyuan,XIE Zhongwei,et al. A study of the strain characteristics and internal force nonlinearity of anti-slide pile[J]. Hydrogeology & Engineering Geology,2021,48(2):114 − 124. (in Chinese with English abstract)
    [16] 李宁,刘冠麟,许建聪,等. 降雨条件下抗滑桩边坡三维稳定性分析[J]. 中国地质灾害与防治学报,2018,29(3):38 − 46. [LI Ning,LIU Guanlin,XU Jiancong,et al. 3D numerical analysis of the stability of a slope reinforced with piles under rainfall conditions[J]. The Chinese Journal of Geological Hazard and Control,2018,29(3):38 − 46. (in Chinese with English abstract)
    [17] XIAO Shiguo. A simplified approach for stability analysis of slopes reinforced with one row of embedded stabilizing piles[J]. Bulletin of Engineering Geology and the Environment,2017,76(4):1371 − 1382. doi:  10.1007/s10064-016-0934-y
    [18] YAN Yuping,XIAO Shiguo. A calculation method for the embedded depth of stabilizing piles in reinforced slopes[J]. International Journal for Numerical and Analytical Methods in Geomechanics,2020,44(7):1077 − 1092. doi:  10.1002/nag.3052
    [19] 熊治文. 深埋式抗滑桩的受力分布规律[J]. 中国铁道科学,2000,21(1):48 − 56. [XIONG Zhiwen. Force distribution rule of deeply buried anti slide pile[J]. China Railway Science,2000,21(1):48 − 56. (in Chinese with English abstract)
    [20] 雷文杰, 郑颖人, 冯夏庭. 沉埋桩的有限元设计方法探讨[J]. 岩石力学与工程学报, 2006, 25(增刊1): 2924 − 2929

    LEI Wenjie, ZHENG Yingren, FENG Xiating. Study on finite element design methods of slope stabilized by deeply buried anti-slide piles[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(Sup 1): 2924 − 2929. (in Chinese with English abstract)
    [21] 雷文杰,郑颖人,王恭先,等. 沉埋桩加固滑坡体模型试验的机制分析[J]. 岩石力学与工程学报,2007,26(7):1347 − 1355. [LEI Wenjie,ZHENG Yingren,WANG Gongxian,et al. Mechanism analysis of slope reinforcement with deeply buried piles with model test[J]. Chinese Journal of Rock Mechanics and Engineering,2007,26(7):1347 − 1355. (in Chinese with English abstract)
    [22] 雷文杰,郑颖人,冯夏庭. 滑坡加固系统中沉埋桩的有限元极限分析研究[J]. 岩石力学与工程学报,2006,25(1):27 − 33. [LEI Wenjie,ZHENG Yingren,FENG Xiating. Limit analysis of slope stabilized by deeply buried piles with finite element method[J]. Chinese Journal of Rock Mechanics and Engineering,2006,25(1):27 − 33. (in Chinese with English abstract)
    [23] 宋雅坤, 郑颖人, 雷文杰. 沉埋式抗滑桩机制模型试验数值分析研究[J]. 岩土力学, 2007, 28(增刊1): 63 − 68

    SONG Yakun, ZHENG Yingren, LEI Wenjie. Analysis of the experimental mechanism of deeply buried anti-slide pile by FEM[J]. Rock and Soil Mechanics, 2007, 28(Sup1): 63 − 68. (in Chinese with English abstract)
    [24] The MathWorks Inc. Global optimization toolbox: User’s guide (R2018b)[M/OL]. (2018-09-01)[2022-11-10]. http://www.mathworks.com/help/pdf doc/gads/gads tb.pdf.
    [25] 徐邦栋. 滑坡分析与防治[M]. 北京: 中国铁道出版社, 2001

    XU Bangdong. Landslide analysis and prevention[M]. Beijing: China Railway Publishing House, 2001. (in Chinese)
    [26] 铁道部第二勘察设计院. 抗滑桩设计与计算[M]. 北京: 中国铁道出版社, 1983

    The Second Survey and Design Institute of Ministry of Railways. Design and calculation of anti-slide pile[M]. Beijing: China Railway Publishing House, 1983. (in Chinese)
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出版历程
  • 收稿日期:  2022-11-02
  • 修回日期:  2022-12-03
  • 网络出版日期:  2023-05-16
  • 刊出日期:  2023-05-15

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