中文摘要：

传统滑坡推力计算，通常应用不平衡推力法进行抗滑桩设计。但对于多排抗滑桩治理工程的设计，常规方法无法准确计算每排桩上的推力大小以及分布形式，而有限元强度折减法计算滑坡推力遵循桩-土相互作用原则，可以得到桩后推力与桩前抗力分布形式。以十堰--天水高速某多级剪出口滑坡为研究对象，通过对破碎岩石老滑坡的成因与滑动机制进行分析，明确促使滑坡复活的各种因素。在此基础上应用Plaxis软件建立有限元模型，通过数值计算方法得到边坡开挖过程、降雨过程与强度折减过程3种不同工况下抗滑桩桩后推力与桩前抗力的分布情况，进而得到每排抗滑桩的滑坡推力分担比。该方法避免了传统方法存在的种种局限性，为多排抗滑桩设计提供一种行之有效的解决办法。

英文摘要：

In traditional landslide thrust calculation, imbalance thrust method is usually applied to the design of anti-slide piles. However, for the design of multi-row anti-slide pile treatment project, conventional methods cannot accurately calculate the value of thrust and the distribution in each row of piles. FE strength reduction method follows the pile-soil principles in landslide thrust calculation, so thrust and resistance distribution forms can be obtained. Taking a multi-level shear opening landslide in Shiyan -Tianshui expressway as the research object, by analysing the causes and sliding mechanism of broken rock landslide, the revival factors of landslide are determined. On this basis, the finite element model is established by applying Plaxis software, the thrust and resistance distributions of anti-slide piles under different working conditions such as slope excavation process, rainfall process and strength reduction process are obtained by numerical calculation, and the sharing ratio of each row of limitations of the traditional methods, which provided an effective piles is obtained. This method can avoid the solution for design of multi-row anti-slide piles.