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以石牌岭隧道围岩工程为例,参照国内外研究现状,选取6个主要影响因素作为评价指标,将岩体质量等级分为5级,采用Z-scores标准对传统熵权加以修正并应用到模型中,保证了评价的客观性和准确性。通过构建隧道岩体质量评价属性决策矩阵,再由级别特征值来确定所属级别,进而对隧道围岩稳定性作出评价。该模型不仅能预测围岩等级,还能对同等级围岩的稳定性进行排序,通过与可拓法评价结果的比较分析,验证了该方法的合理性与优越性,为隧道围岩稳定性评价提供了新的思路。
Taking the Shilaling Tunnel surrounding rock project as an example, with reference to the research status at home and abroad, six major influencing factors are selected as evaluation indexes, the rock mass grades are classified into five levels, the traditional entropy weights are corrected by Z-scores standard and applied To the model, to ensure the objectivity and accuracy of the evaluation. By constructing the decision matrix of the attribute of tunnel rock mass evaluation and determining the grade by the level eigenvalue, the stability of the surrounding rock of the tunnel is evaluated. The model not only can predict the grade of surrounding rock, but also can order the stability of surrounding rock of the same grade. The comparison and analysis of the evaluation results with the extension method verify the rationality and superiority of this method, Evaluation provides a new way of thinking.