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在对悬臂式抗滑桩对边坡支护所产生的土拱效应分析的基础上,提出了桩间竖直拱的存在及合理桩间距,通过桩间竖直拱的受力特征,得出竖直拱的拱形为悬链线,通过拱脚的受力平衡及拱顶截面满足摩尔库仑定理得出竖直拱存在的最大桩间距,并定量地说明了竖直拱的拱跨随土体的粘聚力和内摩擦角的增加而增加,拱高的变化除了与桩间净距相关之外,随桩间土荷载的增加而减小。最后,通过工程实例对计算公式进行了验证,得出的最大桩间距符合工程实际。
Based on the analysis of the soil arching effect caused by the cantilever anti-sliding pile to the slope support, the existence of the vertical arch between the piles and the reasonable spacing between the piles are proposed. By the force characteristics of the vertical arch between the piles, The arch of the vertical arch is the catenary, and the maximum pile spacing of the vertical arch is obtained by the force balance of the arch foot and the cross section of the vault satisfying the Mohr-Coulomb theorem, and quantitatively shows that the arch span of the vertical arch varies with the soil Body cohesion and internal friction angle increased, the change of arch height except for the net spacing between the piles, with the soil between the soil load increases. Finally, the calculation formula is validated through the engineering example, and the maximum piles distance obtained is in line with the actual project.