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桩间距的确定是抗滑桩设计中的一个重要内容,其与桩间土体的土拱效应有关。对常见的5种考虑土拱效应的桩间净距计算理论进行了对比分析,结果表明尽管它们已在单个工程算例中被验证为合理的,但它们不具有广泛的适用性与有效性。进而基于归纳法的思想,利用多个实际工程的设计参数,对建立起考虑土拱效应影响的桩间距统一计算公式进行尝试,最终发现无法建立起一种普适的桩间距计算公式。但借助模型试验与现场试验研究增进对土拱效应作用机理的认识,针对局部区域或单个滑坡建立起桩间距的经验计算公式是可能的。
The determination of pile spacing is an important part of the anti-slide pile design, which is related to the soil arching effect between the piles. Five common theories of calculation of net spacing between piles considering soil arching are compared. The results show that although they have been verified as reasonable in a single engineering example, they do not have extensive applicability and validity. Based on the idea of inductive method, several design parameters of actual engineering are used to try to establish a uniform formula for calculating the inter-pile spacing considering the effect of soil arching effect. Finally, it is found that a common calculation formula of pile spacing can not be established. However, with the aid of model tests and field experiments, it is possible to improve empirical understanding of the mechanism of soil arching and to establish empirical formulas for pile spacing in local areas or individual landslides.