基于土拱效应的抗滑桩与护壁桩的桩间距分析
ANALYSIS OF PILE SPACING BETWEEN ANTI-SLODING PILES AND PETAINING PILES IN ACCORDANCE WITH SOIL ARCHING EFFECT
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摘要: 抗滑桩与护壁桩分别在滑坡治理和基坑支护中发挥着巨大的作用 ,其实施正是利用了土中的成拱效应 ,然而传统桩的设计虽考虑土拱效应的存在 ,但桩间距确定理论与方法并未建立起来。本文首先基于土体的极限平衡条件对滑坡推力作用下的土体中的成拱作用进行研究 ,得出了抗滑桩的最大桩间距公式 ,并以某一具体工程为例 ,对该最大桩间距的物理意义和可用性进行了讨论。在此基础上 ,给出了在考虑土拱效应的情况下合理桩间距的确定方法 ,并以此为据 ,对边坡加固设计提出一些建议.Abstract: Anti-sliding pile are used to stabilize slopes and to control landslide for a long history. It is because of the soil arching effect between the piles that can work effectively. According to the limit equilibrium of the soil mass,the horizontal soil arching effect between the cylindrical anti-sliding piles in the earth is studied and the formula for largest spacing between the piles is proposed. Then, through a case study, the physical meanings and the feasibility of the largest spacing between the piles are discussed. Then the suitable spacing between the piles is proposed in consideration of the soil arching effect. Finally, Some useful suggestions for the slope engineering designing are also proposed in the paper.
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