抗滑桩设计中的两个问题

Two Problems in Design Methods of Anti-slide Piles

文章针对抗滑桩加固边坡设计中抗滑桩内力计算、合理桩长的选择这两个问题,运用有限元强度折减法直接计算抗滑桩所受的滑坡推力、桩身内力、滑面形式,优化锚索的锚固力,使锚索与抗滑桩协调作用。研究不同桩长的抗滑桩加固效果,发现沉埋桩不仅可使边坡达到足够的稳定性,而且沉埋桩所受的滑坡推力降低、桩身内力比全长桩更为合理,在条件许可的情况下沉埋桩可更为有效地加固边坡,这为抗滑桩设计中选择合理桩长的这个问题提供了一个很好的解决方法。

To solve two problems on the determination of internal forces and appropriate length in design of anti-slide piles,the lateral forces and internal forces of piles and shape of the slide surface are directly determined,and the force supplied by the anchor cable is optimized to accord the anti-slide piles with non-linear finite element method with shear strength reduction.Comparing reinforcement effects by anti-slide piles with different lengths,it's concluded that deeply-buried piles can provide sufficient stability for slope,the lateral forces are decreased with pile length decreasing and the distribution of internal forces are more rational than that on traditional full length piles.Under permissive conditions sunken piles can reinforce the slope more effectively,so the method of finite element with shear strength reduction is a new better method for determination of pile length in the design of anti-slide piles.