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基于圆弧主应力迹线的黏性土主动土压力分析

王佳宇 曹文贵 王雨波 张慧姐

王佳宇, 曹文贵, 王雨波, 张慧姐. 基于圆弧主应力迹线的黏性土主动土压力分析[J]. 水文地质工程地质, 2021, 48(6): 81-88. doi: 10.16030/j.cnki.issn.1000-3665.202103006
引用本文: 王佳宇, 曹文贵, 王雨波, 张慧姐. 基于圆弧主应力迹线的黏性土主动土压力分析[J]. 水文地质工程地质, 2021, 48(6): 81-88. doi: 10.16030/j.cnki.issn.1000-3665.202103006
WANG Jiayu, CAO Wengui, WANG Yubo, ZHANG Huijie. An analysis of active earth pressure of cohesive soil based on the layering of principal stress traces[J]. Hydrogeology & Engineering Geology, 2021, 48(6): 81-88. doi: 10.16030/j.cnki.issn.1000-3665.202103006
Citation: WANG Jiayu, CAO Wengui, WANG Yubo, ZHANG Huijie. An analysis of active earth pressure of cohesive soil based on the layering of principal stress traces[J]. Hydrogeology & Engineering Geology, 2021, 48(6): 81-88. doi: 10.16030/j.cnki.issn.1000-3665.202103006

基于圆弧主应力迹线的黏性土主动土压力分析

doi: 10.16030/j.cnki.issn.1000-3665.202103006
基金项目: 国家自然科学基金项目(751202001225)
详细信息
    作者简介:

    王佳宇(1996-),女,硕士研究生,研究方向为岩土工程。E-mail:1906944118@qq.com

    通讯作者:

    曹文贵(1963-),男,教授,博士(后),主要从事岩土工程教学与科研工作。E-mail:cwglyp@hnu.edu.cn

  • 中图分类号: TU432

An analysis of active earth pressure of cohesive soil based on the layering of principal stress traces

  • 摘要: 墙背粗糙导致墙后土体应力方向发生偏转,目前,黏性土中考虑土体应力方向偏转对土压力影响的研究较少。为此,本文首先在探讨墙后土体主应力偏转规律的基础上,采用沿主应力迹线分层形成曲线薄层单元。然后,通过分析曲线薄层单元的受力情况,建立曲线薄层单元的静力平衡方程,推导出平动模式下黏性土体土压力沿墙高分布的公式,进而获得黏性土土压力分析新方法。最后,将本文方法与实测结果和现有理论进行对比验证和参数分析,验证本文方法的可靠性和合理性。研究结果表明:考虑墙土摩擦效应的计算结果更能准确反映黏性土体土压力沿墙高的分布规律;土压力大小随黏聚力增大而减小;随着墙土摩擦角的增大,土压力合力逐渐减小,作用点高度缓慢升高。
  • 图  1  土楔体及主应力迹线模型

    Figure  1.  Soil wedge and principal stress trace model

    图  2  墙土接触面受力分析和莫尔圆情况

    Figure  2.  Deflection of the principal stress and Mohr circle at the contact surface of the wall back

    图  3  滑裂面处主应力偏转情况

    Figure  3.  Deflection of the principal stress at the slip surface

    图  4  主应力迹线分层模型及薄层单元受力分析

    Figure  4.  Layered model of the principal stress trace and force analysis of thin-layer elements

    图  5  主动土压力对比分析

    Figure  5.  Comparative analysis of active earth pressure

    图  6  墙土摩擦角δ对土压力分布的影响

    Figure  6.  Influence of the wall-soil friction angle on earth pressure distribution

    图  7  土体内摩擦角φ对土压力分布的影响

    Figure  7.  Influence of the friction angle in soil on the distribution of earth pressure

    图  8  黏聚力c对土压力分布的影响

    Figure  8.  Influence of cohesion on the distribution of earth pressure

    图  9  墙土摩擦角δ对土压力合力的影响

    Figure  9.  Influence of wall-soil friction angle on the resultant force of earth pressure

    图  10  墙土摩擦角δ对土压力合力作用点高度的影响

    Figure  10.  Influence of wall-soil friction angle on the height of the resultant point of earth pressure

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出版历程
  • 收稿日期:  2021-03-01
  • 修回日期:  2021-04-22
  • 网络出版日期:  2021-11-15
  • 刊出日期:  2021-11-15

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