基于因子分析法的边坡稳定性评价指标权重

为快速评价边坡的稳定性,以汤屯(汤口-屯溪)高速公路44个典型边坡为研究对象,采用因子分析法,对边坡稳定性的7个评价指标坡度、坡高、岩性、边坡结构、结构面胶结、控制性结构面、岩体完整性进行了分析,根据它们对边坡稳定性的影响进行排序,并将评价指标得分进行归一化处理后作为评价指标的权重值.研究结果表明:主因子重要性排序依次为边坡形态、边坡结构和结构面特征;评价指标重要性排序依次为岩体完整性、岩性、边坡结构、控制性结构面、结构面胶结、坡度和坡高. 

Weights of Slope Stability Evaluation Indexes Based on Factor Analysis Method

For rapid evaluation of slope stability, 44 typical slopes along Tangtun highway were investigated. The factor analysis method was adopted to analyze 7 evaluation indicators of slope stability, i.e., slope gradient, slope height, lithology, slope structure, structural plane cementation, main discontinuity and rock mass integrity. These indexes were sorted in light of their effects on slope stability, and evaluation indexes' grades after normalization were taken as evaluation indexes' weights. The research shows that from their importance, main factors are listed as slope shape, slope structure and structural plane characteristics in proper order, and sorting of evaluation indexes is in turn rock mass integrity, lithology, slope structure, main discontinuity, structural plane cementation, slope gradient and slope height.