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考虑自重应力的悬臂式抗滑桩三维土拱效应及合理间距研究

, PP. 18-25

Keywords: 道路工程,路堑边坡,有限元方法,合理桩间距,土拱效应,悬臂式抗滑桩,自重应力

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Abstract:

？为了探讨路堑边坡悬臂式抗滑桩的合理间距问题,考虑到自重应力的存在及桩间土的受力特点,根据桩间滑体自身的强度条件及土拱的轴向应力与拱跨的关系,建立了三维计算模型;推导出悬臂式抗滑桩的临界高度与最大桩间净距的计算公式,并结合计算公式研究了桩间距对相关参数的敏感度,模拟了桩间土拱效应沿高度分布的空间形态,分析了桩后土拱效应的影响范围;通过工程实例对推导的合理桩间距计算方法进行了验证。结果表明:实际设计值与计算结果基本一致,在对悬臂式桩土拱效应进行研究时应建立三维模型。

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