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坝基岩体质量综合评价是一个多因素协同影响效应的系统过程,针对评价过程中存在的问题,引进云模型、投影寻踪法、层次分析法及模糊熵理论,提出一种基于云模型和组合赋权的岩体质量二维评价模型。该模型依据岩体质量评价指标体系及分级标准,计算各评价指标隶属于不同质量等级的云模型参数;基于层次分析与投影寻踪法求解各指标的组合权重;代入岩体实测资料,得到待评岩体隶属于各质量等级的综合确定度;以模糊熵E作为辅助参评量,结合等级评价共同构建岩体质量的二维评价模式。最后将模型应用到某水电站坝基岩体质量评价中,将评价结果与其他评价方法进行对比分析,结果表明该模型运用于岩体质量评价有效可行,且评价结果直观,为岩体质量评价提供了一条新途径。
The comprehensive evaluation of rock mass quality of dam foundation is a systematic process of synergistic effect of multiple factors. In view of the problems existing in the assessment process, the cloud model, projection pursuit method, analytic hierarchy process and fuzzy entropy theory are introduced. Empowered rock mass two - dimensional evaluation model. Based on the rock mass quality evaluation index system and grading standards, the model calculates the cloud model parameters of each quality index under the evaluation of rock mass quality. The weight of each index is calculated based on the analytic hierarchy process and the projection pursuit method. The rock mass is subordinate to the comprehensive certainty of each quality grade. The fuzzy entropy E is used as the auxiliary parameter to evaluate the rock mass quality in combination with the grade evaluation. Finally, the model was applied to the dam foundation rockmass quality evaluation of a hydropower station, and the evaluation results were compared with other evaluation methods. The results show that the model is effective and feasible for rock mass quality assessment, and the evaluation results are intuitive, providing a A new way.