摘要
影响黄土高边坡稳定性的因素众多且部分具有明显的不确定性。本文在现有的模糊模式识别模型评价黄土高边坡稳定性的基础上,考虑影响黄土高边坡稳定性因素所具有的客观性,提出了一种基于变权模糊理论评价黄土高边坡稳定性的方法。该方法首先通过相对隶属度理论求得待评价黄土高边坡稳定性分级标准的相对隶属度矩阵,再利用变权理论对指标因素进行赋权,最后通过变权模糊模型求得边坡稳定性评价等级特征值,达到对边坡稳定性评价的目的。将该模型应用于某黄土高边坡工程并与常权法和极限平衡法结果进行对比,结果表明使用变权模糊理论更科学,可以应用于相关工程领域。
Loess high slope stability is influenced by numerous of factors,some of which have obvious uncertainties.In this paper,based on the existing fuzzy pattern recognition model to evaluate the stability of loess high slopes,considering the objectivity of the factors affecting the stability of loess high slopes,a method based on variable weight fuzzy theory is proposed to evaluate the stability of loess high slopes.First,the relative membership degree matrix of the sample and the classification criteria of stability are obtained by the relative membership degree theory.Then the variable weight theory is used to weight the evaluation index factors,and finally obtains the stability evaluation grade eigenvalue through the variable weight fuzzy model,thus to achieve the purpose of evaluating the stability of the slope.The model is applied to a loess high slope project and compared with the results of the normal weight method and limit equilibrium method.The results show that the use of variable weight fuzzy theory is more scientific and can be applied in related engineering fields.
作者
何建东
张亚
梁谊
HE Jiandong;ZHANG Ya;LIANG Yi(China JK Institute of Engineering Investigation and Design Co., Ltd., Xi'an 710043,China)
出处
《西北水电》
2020年第3期41-45,共5页
Northwest Hydropower
关键词
黄土高边坡
含水量
模糊模式识别法
变权理论
评价等级特征值
high loess slope
water content
fuzzy recognition method
variable weight theory
evaluation grade eigenvalue
