Pile‐Spacing Calculation of Anti‐Slide Pile Based on Soil Arching Effect

Abstract

Anti-slide pile is one of the most frequently used measures in landslide control globally. Pile-spacing has always been determined by the load capacity of single piles or according to engineering empirical experience. Many engineering practices and laboratory experiments show that the soil arching effect exists in landslide control with anti-slide piles. In this study, we aim to calculate pile-spacing in terms of the soil arching effect. We investigated the pile-soil interaction mechanism and propose that, at the limit, the pile-back soil arch resists landslide thrust only. According to Mohr–Coulomb strength theory and limit equilibrium theories, we derived a new pile-spacing calculation equation. We verified the derived pile-spacing calculation equation with real projects. The calculated results are similar to those of practical engineering designs, in which the difference is within 10%. The equation can be used in anti-slide pile preliminary design. This study can be a reference for pile-spacing calculation based on the soil arching effect.

Deformation Control Method of the Antislide Pile under Trapezoidal Load in the Zhangjiawan Landslide

“…e aforementioned parameters are substituted into equation (10), and the displacement of the pile head is 15 cm, which is consistent with the result of the site investigation (approximately 14.8 cm). However, this is disadvantageous to the stability of the landslide.…”

“…e lateral behavior of two-pile group foundations installed in weathered rock slopes was also severely affected by the angle of the slope [8]. In landslide controlling, antislide piles play an important role and coordinate deformation with the surrounding soil to improve the stability of the whole slope [9][10][11][12]. e excavation or increases in the driving force of landslides behind piles lead to the deformation of piles and even pile damage [13][14][15].…”

New Arm-Stretching-Type Anti-Slide Pile Design and Verification

“…For the control of both artificial (i.e., cut and fill) and natural slopes, anti-slide retaining measures are often adopted. These measures mainly include retaining walls and anti-slide piles (Li et al, 2016;Li et al, 2019;Chen et al, 2020;Liu et al, 2021). A retaining wall is primarily used for the control of small, shallow landslides (Trandafir et al, 2009;Jiang and Towhata, 2013;Muraro et al, 2015), and its construction process has a significant impact on landslide stability.…”

“…In other words, the landslide body continues to be regarded only as the source of sliding failure thrust, which is directly resisted by the anti-slide pile (Chow, 1996). Methods for calculating the landslide thrust acting on anti-slide piles embody the slide-resist concept of the anti-slide pile design (Ausilio et al, 2001;He et al, 2015;Wang et al, 2020). Smethurst and Powrie (2007) reported a railway embankment control project that was intended to achieve a high design safety factor; the load transferred to the 0.6-m-diameter anti-slide pile was calculated to be 60 kN using the limit equilibrium method.…”

Analysis of pile spacing considering end-bearing soil arching and friction soil arching

“…Based on the analysis of soil arching, many researchers developed the method to calculate the reasonable pile spacing. Zhou et al [7], Jiang et al [8], and Chen et al [9] supposed the end-bearing soil arching undertook all the landslide thrust and the shape of soil arching was parabolic, and thus conducting the reasonable pile space according to Mohr-Coulomb strength criterion. Some researchers [10][11][12] hypothesized the friction soil arching between piles bear all the thrust.…”