The use of stabilising piles is an effective method of reinforcing a slope against landslides. Soil arching between the piles promotes more load transfer into the piles, thus improving slope safety. However, few analytical solutions have been proposed for assessing the safety of an anisotropic slope with soil arching between stabilising piles, especially in most current design procedures. Based on BS 8006-1:2010, an analytical method was developed to evaluate the stability of a slope reinforced with stabilising piles, taking the anisotropy of soil strength and the horizontal soil-arching effect into account. A field case was used to assess the results of the proposed analytical method; differences of approximately 0·6–8·9% were found. To validate the proposed analytical method, a three-dimensional numerical simulation considering soil anisotropy was conducted; variation of the soil cohesion with depth and the direction of principal stress was introduced into the numerical analysis. The safety factors predicted by the numerical simulation agreed well with those derived by the proposed analytical method, with differences of 0·7–17%. The safety factor was found to decrease with increasing anisotropy coefficient and increase with higher effective cohesion and effective friction angle.

中文翻译：

---

考虑土体各向异性的桩稳边坡解析方法

使用稳定桩是加固边坡防止滑坡的有效方法。桩之间的土拱促进更多的荷载转移到桩中，从而提高边坡的安全性。然而，很少有人提出分析解决方案来评估在稳定桩之间具有土拱的各向异性边坡的安全性，尤其是在大多数当前的设计程序中。基于BS 8006-1:2010，开发了一种分析方法来评估稳定桩加固边坡的稳定性，同时考虑土体强度的各向异性和水平土拱效应。一个现场案例被用来评估所提出的分析方法的结果；发现了大约 0·6–8·9% 的差异。为了验证所提出的分析方法，进行了考虑土壤各向异性的三维数值模拟；将土壤黏聚力随深度和主应力方向的变化引入到数值分析中。数值模拟预测的安全系数与所提出的分析方法得出的安全系数一致，差异为0·7-17%。发现安全系数随着各向异性系数的增加而降低，随着有效内聚力和有效摩擦角的增加而增加。