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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。
In order to investigate the reasonable spacing of cantilever anti-slide piles of cut slope, taking into account the existence of self-weight stress and the force characteristics of soil between piles, according to the strength conditions of the slide between piles and the axial stress of soil arches, The calculation formula of the critical height of the cantilever anti-slide pile and the maximum clearance between the piles are deduced. The sensitivity of the pile spacing to the relevant parameters is also studied by the calculation formula, and the soil arching effect between the piles is simulated Based on the spatial distribution of height distribution, the influence range of soil arching effect after pile is analyzed. The calculation method of reasonable pile spacing is verified through engineering examples. The results show that the actual design values are in good agreement with the calculated ones. The three-dimensional model should be established when studying the soil arching effect of cantilever piles.