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适用倾斜滑面的刚性抗滑桩最小嵌固深度计算方法

肖世国 齐远 孙来宾

肖世国, 齐远, 孙来宾. 适用倾斜滑面的刚性抗滑桩最小嵌固深度计算方法[J]. 中国地质灾害与防治学报, 2021, 32(4): 113-119. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-15
引用本文: 肖世国, 齐远, 孙来宾. 适用倾斜滑面的刚性抗滑桩最小嵌固深度计算方法[J]. 中国地质灾害与防治学报, 2021, 32(4): 113-119. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-15
Shiguo XIAO, Yuan QI, Laibin SUN. Calculation method on the minimum inserted depth of rigid anti-slide piles in the stable layer with oblique top surfaces in the downslope area[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(4): 113-119. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-15
Citation: Shiguo XIAO, Yuan QI, Laibin SUN. Calculation method on the minimum inserted depth of rigid anti-slide piles in the stable layer with oblique top surfaces in the downslope area[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(4): 113-119. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-15

适用倾斜滑面的刚性抗滑桩最小嵌固深度计算方法

doi: 10.16031/j.cnki.issn.1003-8035.2021.04-15
基金项目: 国家自然科学基金项目(51578466)
详细信息
    作者简介:

    肖世国(1973-),男,教授,博导,主要从事边坡稳定性与支挡结构方面的研究。E-mail:xiaoshiguo@swjtu.cn

  • 中图分类号: P642.22

Calculation method on the minimum inserted depth of rigid anti-slide piles in the stable layer with oblique top surfaces in the downslope area

  • 摘要: 为计算确定桩前滑面倾斜情况下加固边坡的抗滑桩最小嵌固深度,基于倾斜地面条件的抗滑桩计算地基系数法,确定嵌固段桩侧土层压力,同时采用塑性极限分析方法,推导与滑面倾角密切相关的嵌固段土层极限抗力,并根据桩侧地层最大压力不超过其极限抗力的条件,建立了抗滑桩最小嵌固深度计算方法,并确定了其与滑面倾角的关系。实例分析表明,抗滑桩最小嵌固深度随滑面倾角呈非线性增大,在倾角为10°~30°范围内变化显著;嵌固段地层黏聚力、内摩擦角和重度对抗滑桩最小嵌固深度均有明显影响,且呈负相关关系;本文方法所得桩体最小嵌固深度比传统考虑桩前滑面倾斜影响的方法约小18%。
  • 图  1  桩前倾斜滑面的嵌固段前侧土体受力分析模型

    Figure  1.  Analysis model of stable layer with oblique top surface in the downslope area of embedded segment of anti-slide piles

    图  2  抗滑桩加固某滑坡实例示意图

    Figure  2.  Sketch map of a landslide example reinforced with anti-slide piles

    图  3  嵌固段桩前侧地层压应力最大设计值与极限值随嵌固段深度变化曲线

    Figure  3.  Inserted-depth-dependent variation curve of design maximum lateral stress and the ultimate loading capacity on the stable layer in the downslope area of embedded segment of the pile in the example

    图  4  本法确定最小嵌固深度时抗滑桩内力

    Figure  4.  Internal forces of a anti-slide pile under its minimum inserted depth in the example by the proposed method

    图  5  不同滑面倾角下抗滑桩最小嵌固深度

    Figure  5.  Minimum inserted depth of a anti-slide pile under various dip angles of slip surface

    图  6  不同黏聚力下最小嵌固深度随滑面倾角变化曲线

    Figure  6.  Variation curve of minimum inserted depth of a pile with dip of slip surface under various cohesions

    图  7  不同内摩擦角下最小嵌固深度随滑面倾角变化曲线

    Figure  7.  Variation curve of minimum inserted depth of a pile with dip of slip surface under various internal friction angles

    图  8  不同重度下最小嵌固深度随滑面倾角变化曲线

    Figure  8.  Variation curve of minimum inserted depth of a pile with dip of slip surface under various unit weights

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出版历程
  • 收稿日期:  2020-08-22
  • 修回日期:  2020-09-19
  • 网络出版日期:  2021-10-11
  • 刊出日期:  2021-08-25

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