基于云模型的岩质边坡稳定性评估研究  

Stability evaluation of a rock slope based on the cloud model

作　　者：张军[1] 陈征宙[1] 刘登峰[1] 

机构地区：[1]南京大学地球科学与工程学院,江苏南京210023

出　　处：《水文地质工程地质》2014年第6期44-50,共7页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目资助(41272313)

摘　　要：针对边坡系统中的不确定性,基于云模型理论,建立了岩质边坡稳定性的云模型评估方法。选取影响边坡稳定性的11项指标,计算各指标隶属于不同岩质边坡稳定性等级的云模型数字特征,结合正向正态云模型和指标权重,计算待评估边坡的综合确定度,最终确定岩质边坡稳定性等级。将方法应用于桂柳高速公路边坡的稳定性评估,结果与可拓方法、模糊数学方法、基于Hoek-Brown准则方法以及基于RMR岩体质量评价方法等的评估结果一致,符合边坡野外实际勘察情况,具有一定的可行性和有效性。In light of the uncertainties in slope systems,a new model for rock slope stability evaluation is proposed in this paper based on the cloud model theory.Eleven evaluation indexes influencing the stability of a rock slope are selected,and the numerical characteristics of each index,which belong to different grades of the cloud model,are also calculated.Considering the weights of each index,the comprehensive degrees of certainty are obtained,and the stability grade of rock slope is finally specified by the maximum certainty degree.The proposed model is used to evaluate the stability of the rock slope at the Gui-Liu highway.The calculated results are consistent with those obtained with the extension method,the fuzzy mathematics method,as well as the methods based on the Hoek-Brown criterion and RMR,indicating that the proposed model is feasible and effective.

关 键 词：稳定性评估 云模型 岩质边坡 不确定性 

分 类 号：TU457[建筑科学—岩土工程] P642.22[建筑科学—土工工程]