论文部分内容阅读
边坡非圆弧临界滑动面搜索是边坡稳定性计算中的一个关键问题,其实质是找到一条安全系数最小的滑动路径。采用新的全局最优化算法——径向移动优化算法搜索路径相对其他算法具有快速、存储空间小、计算简单等优势,但却存在搜索结果不稳定的现象,为克服这个问题,对其数据结构进行调整,提出了改进的径向移动算法,使路径搜索趋于稳定。搜索到的滑动面路径对应的安全系数采用不平衡推力法进行计算,在可行性分析的基础上,采用二分法对安全系数快速、精确地求解。通过一个水库岸坡的算例计算,验证了改进的径向移动算法用于非圆弧临界滑动面搜索的有效性。又通过分析对比改进的径向移动优化算法和粒子群算法的搜索结果,展示了改进的径向移动算法快速收敛,稳定性高的显著优势。
The non-circular critical slip surface search of slope is a key problem in slope stability calculation. The essence is to find a sliding path with the least safety factor. Compared with other algorithms, the new global optimization algorithm - radial moving optimization algorithm has the advantages of fast search path, small storage space, simple calculation and other advantages, but the search results are unstable. To overcome this problem, Adjusted, proposed an improved radial movement algorithm, so that the path search tends to be stable. The safety factor corresponding to the searched sliding surface path is calculated by using the unbalanced thrust method. Based on the feasibility analysis, the dichotomy is used to solve the safety factor quickly and accurately. A case study of a reservoir bank is carried out to verify the effectiveness of the improved radial movement algorithm for non-arc critical slip surface search. By analyzing and comparing the improved radial moving optimization algorithm and the PSO search results, the improved radial moving algorithm is demonstrated to have the advantages of fast convergence and high stability.