梯形断面抗滑桩桩间距计算方法研究

针对滑坡治理新方法——梯形断面抗滑桩,分析了梯形断面抗滑桩土拱效应的形成机理,建立了梯形断面抗滑桩桩间距计算模型。将该类桩的土拱效应视为两个独立的土拱作用,利用土体极限强度、拱脚强度以及桩间静力平衡推导了相应的桩间距计算公式。实例分析表明,梯形断面抗滑桩桩间净距比其他矩形桩桩间净距大,说明梯形抗滑桩斜边的存在使土拱效应整体效果得到加强,梯形抗滑桩相较于其他形式的抗滑桩具有更好的抗滑效果。

Study on spacing calculation method of anti-slide piles of trapezoidal section

In view of the new trapezoidal section anti-slide pile, we analyze the formation of soil arching effect of the anti-slide pile with trapezoidal cross-section, and established the spacing calculation model of anti-slide piles of trapezoidal cross-section. The effect of this kind of soil arch is considered as two independent individuals. The formulas for calculating the pile spacing are obtained by using the soil ultimate strength, the strength of the arch foot and the static balance of piles. The practical analysis shows that the spacing of trapezoidal anti-slide piles is larger than that of other rectangular piles, indicating that the effect of soil arching effect is strengthened due to the bevel edge of the trapezoid anti-slide piles and the trapezoidal anti-slide piles have better anti sliding effect than other anti-slide piles.