抗滑桩是广泛应用于边坡支挡防护工程及治理滑坡中一种重要的结构物,具有施工快、安全可靠等特点。而在抗滑桩设计中,桩间距是一项重要指标,一般是根据经验确定桩间距。因此,桩间距偏小容易造成工程投资浪费,桩间距偏大容易造成抗滑桩效应失效。本文基于工后滑坡存在的土拱效应,分析了土拱效应在抗滑桩中的形成机理、存在条件及影响因素,同时探讨了基于土拱效应的抗滑桩合理桩间距的计算方法。 Anti-slide pile is widely used in slope support engineering and landslide prevention and control of an important structure, with fast construction, safety and reliability. In anti-slide pile design, the pile spacing is an important indicator, usually based on experience to determine the pile spacing. Therefore, the pile spacing is too small, easily lead to project waste of investment, pile spacing is too large, easy to cause anti-slide pile effect failure. Based on the soil arching effect of post-construction landslide, the formation mechanism, existing conditions and influencing factors of soil arching in anti-slide piles are analyzed in this paper. Meanwhile, the calculation method of rational pile spacing of anti-slide piles based on soil arching effect is discussed.