基于FOA法搜索危险滑动面的三维极限平衡分析

Three-dimensional limit equilibrium analysis based on fruit fly optimization algorithm for searching the dangerous sliding surface

针对三维极限平衡法分析边坡稳定时不能搜索最危险滑动面的问题,以索风营水电站Dr2危岩体加固工程为研究对象,采用果蝇优化算法搜索危岩体的滑动面,采用改进的三维极限平衡法对危岩体进行抗震稳定计算,提出基于果蝇优化算法的危岩体危险滑动面搜索方法,并分析了危岩体各种加固措施对稳定的贡献度。结果表明:加固后的危岩体在地震工况下可以维持稳定,其中泥岩灌浆对稳定的贡献最大,顶部锚索贡献最小。该方法弥补了传统极限平衡法无法所搜滑动面的缺陷,提高了边坡失稳的预测精度,可为类似工程提供一定的参考。

The three-dimensional limit equilibrium method cannot search the most dangerous sliding surface when analyzing the slope stability.Taking the Dr2 dangerous rock mass reinforcement project of Suofengying Hydropower Station as the research object,the fruit fly optimization algorithm(FOA)was used to search the sliding surface of the dangerous rock mass.An improved 3 D limit equilibrium method was used to calculate the seismic stability of dangerous rock mass.A dangerous sliding surface search method based on the FOA was proposed and the contribution of various reinforcement measures to stability was analyzed.The results showed that the strengthened dangerous rock mass can maintain stability under the earthquake condition,and mudstone grouting contributes the most to the stability,and the top anchor cable contributes the least to the stability.This method helps solve the defect that the traditional limit equilibrium method cannot search the sliding surface,improves the prediction accuracy of slope instability,and can provide some reference for similar projects.