关键词: 抗滑桩, 滑坡治理, 有限元极限分析, 桩土相互作用

Abstract: The slope stabilized by single-row piles is simulated by nonlinear finite element method with shear strength reduction. The piles are laid out at variant sites on the slope surface, whose spacing is four meters each. Conclusions are made that factor of stability, the location and shape of the slide surface vary as pile location varies. Pile location variable determines whether slide comes from anterior surface of the pile or from posterior surface. One critical principle for the option of pile location is that the factor of stability on landslide control is greater than the factor of safety to meet with design expects, else slide will originate from pile head or from anterior surface of the pile. Under the same factor of stability, the lateral force, internal forces such as shear force, moment and deflection of the pile vary with pile location variable. The length of the pile is longest and the lateral force is largest when the pile location is in the middle of the slope, so it is not desirable location for the pile. But the deflection and resisting force responded are largest. The lateral forces on the normal method and the method of finite element are equal for the pile that there is no soil mass in the front of pile. The lateral force is reduced when the pile as beam element is located in the body of landslide, because resisting forces supplied by the soil mass in front of the pile are taken into account.

Key words: anti-slide piles, landslide control, limit analysis with finite elements, interaction of piles with soil