Evaluation of lateral forces acting on the stabilizing pile above the slip mass can directly influence the accuracy of calculating the internal force of a pile,thus affecting the rationality of the design of stabilizing piles. A novel method to accurately evaluate these lateral forces on the basis of the limit equilibrium method of slices was proposed in this study. The method was used to estimate the lateral forces acting on the stabilizing piles above the slip surface of a landslide. A landslide was divided into upper and lower sections, and the distinct target safety factors of the two sections were used to determine the lateral forces. The maximum value of the lower lateral force was determined when a state of limit equilibrium was reached. A case study was conducted to compare the lateral forces obtained using the traditional and proposed methods. Results demonstrate that the lower lateral resistance forces account for 75.1%, 43.5%, and 19.6% of the upper lateral forces in the three selected cases. These findings indicate a massive resistance force in the lower part and the considerable effect of seepage of groundwater on the lateral forces. The proposed method provides a good prospect to optimize the design of stabilizing piles.
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