针对岩质边坡安全稳定性评价的层次性与模糊性等不确定性问题,将岩质边坡安全稳定性评价作为一个模糊系统,充分考虑地质现状、工程现状、环境条件及监测表现4个方面及其影响因素,构建了包括目标层、准则层、指标层多个层次的岩质边坡安全稳定性评价指标体系;将主成分分析法与改进层次分析法相结合,提出了一种能同时顾及主、客观权重的赋权方法,可提高指标权重的合理性与准确性;运用模糊理论构造隶属度函数,进而建立岩质边坡安全稳定性的多层次模糊综合评价模型。实例应用表明,该模型可行,操作简便,结果符合实际,为岩质边坡安全稳定性评价提供了一条新途径。
Abstract
In view of the uncertainty such as hierarchy and fuzziness of assessing rock slope’s safety and stability, we considered the stability assessment as a fuzzy system and took geological conditions, engineering status, environmental conditions and monitoring performance as well as their influence factors into account, hence building an index system which contains multiple layers including target layer, criterion layer and index layer. Principal component analysis and the improved analytic hierarchy process were combined to present a method which takes into consideration the subjective and objective weights at the same time and improves the accuracy and rationality of index weights. Membership functions were constructed by using fuzzy theory. Finally the comprehensive multi-level fuzzy model for assessing rock slope safety and stability was established. Practical application shows that the model is feasible and easy to operate and the result is in accordance with the reality. The model provides a new approach for the assessment of rock slope’s safety and stability.
关键词
边坡安全稳定性 /
主成分分析法 /
组合赋权 /
模糊理论 /
综合评价
Key words
slope safety and stability /
principal component analysis /
combinatory weighting /
fuzzy theory /
comprehensive assessment
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基金
国家自然科学基金项目(51409139,51569014,51669013)
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