基于云模型和组合赋权的岩体质量二维评价模型

Two-dimensional evaluation model of rock mass based on combination weighting and cloud model

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。

Dam foundation rock mass quality evaluation is a multi-factor system process of synergy effect, in view of the problems existing in the evaluation process, the introduction of Cloud model, projection pursuit method and analytic hierarchy process（AHP） and fuzzy entropy theory, is put forward based on the improved Cloud-PP-AHP rock mass quality evaluation model for the two-dimensional. The model on the basis of rock mass quality evaluation index system and classification standard and evaluation index is calculated which belong to different quality levels of cloud model parameters; Based on hierarchy analysis and projection pursuit method to solve the combination weights of the indexes; Plug in the measured data of rock mass, for evaluation of rock mass is affiliated with various quality grades of integrated uncertainty; Assisted by fuzzy entropy E as the contestant, jointly build the rock mass quality grade evaluation of two dimensional evaluation model. Finally the model is applied to a hydropower station dam foundation rock mass quality evaluation, the evaluation results with other evaluation methods were analyzed, the results show that the model is applied to rock mass quality evaluation of effective and feasible, and the evaluation results intuitive, for rock mass quality evaluation provides a new way.