土拱效应在抗滑桩设计中的应用

Application of soil arching effect to the anti-sliding pile design

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 a kind of important structure which is widely used in slope support engineering and landslide treatment with fast construction, safety and reliability, etc. In the design of anti-slide pile, the piles spacing is an important index, it is generally based on experience to determine the spacing between piles. Therefore, the piles spacing is too small, which cause a waste of engineering investment. The piles spacing is too large, which cause the invalid of anti-slide pile. Based on the soil arching effect in the landslide after engineering, this paper analyzed the forming mechanism, the existing conditions and the infl uencing factors of the soil arching effect in the antislide pile,and discussed the calculation method of the reasonable piles spacing of the anti-slide pile based on the soil arching effect.