摘要
选用岩石质量指标、岩体完整性指标、地应力、黏聚力、内摩擦角、坡高和日最大降水量7个影响因素作为边坡稳定性评价指标,采用改进的层次分析法(AHP)计算各评价指标的权向量,结合逼近理想解排序法(TOPSIS)构建改进的AHP-TOPSIS模型。依据单指标等级分类区间的下限构造5个不同等级的临界值边坡,将其稳定性指标临界值与4组边坡稳定性指标实测数据一同代入AHP-TOPSIS评判模型,通过计算它们与理想解的贴进度来划分稳定性等级分类区间,进而与4组待评价边坡贴进度对比确定出边坡稳定性等级。研究结果表明,采用AHP-TOPSIS模型对边坡稳定性的评价结果与灰色关联法和可拓评价法等结果基本相符,证明该模型的可行性,为边坡稳定性评价提供了一种新的分析方法。
Seven influencing factors of rock quality index, rock mass integrity index, ground stress, cohesion,internal friction angle, slope height and daily maximum precipitation are selected as the slope stability evaluation indexes. The modified analytic hierarchy process(AHP) is sued to calculate the weight vector of each evaluation index. The technique for order preference by similarity to ideal solution(TOPSIS) is combined to build the modified AHP-TOPSIS judging model. Based on the lower limit of the grade classification interval of single index, five different grades of critical value slope are constructed. The critical value of the stability index is brought into AHP-TOPSIS judging mode together with the measured data of four groups of slope stability index. The calculation of indexes and the closeness of ideal solution can divide the classification interval of stability grade so as to compare the slope closeness of four groups to be evaluated and to determine the stability grade of slope. The study result shows that the evaluation result of slope stability by the AHP-TOPSIS model are basically consistent with the results of grey correlation method and extension evaluation method. The feasibility of this model is proved, which provides a new analysis method of evaluating the slope stability.
出处
《城市道桥与防洪》
2016年第9期211-215,21,共5页
Urban Roads Bridges & Flood Control