隧道围岩稳定性评价的改进熵权-属性识别模型  

Improved Entropy-attribute Recognition Model of Surrounding Rock Stability in Tunnel

作　　者：张龙云[1,2] 李术才[1] 杨尚阳[1,3] 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061 [2]山东大学后勤管理处,山东济南250100 [3]山东交通学院数理系,山东济南250023

出　　处：《水电能源科学》2012年第4期67-69,共3页Water Resources and Power

基　　金：国家973计划基金资助项目(2007CB209407);国家自然科学基金资助面上项目(40872203);国家自然科学基金青年基金资助项目(50904043)

摘　　要：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 surrounding rock project in Shipailing tunnel for an example, 6 main influencing factors are selected as the evaluation indices and the rock mass quality is divided into five grades on the basis of current research status. The entropy method that is improved with Z-scores standard is applied to calculate weights so as to ensure the objectivity and accuracy of the evaluation. By constructing attribute decision matrix of the rock mass quality evaluation, the characteris- tics of grade is used to determine the attribute level. And then the stability of surrounding rock in tunnel is evaluated. The model can not only predict the grade of the rock mass, but also sort the strength of stability at the same grade. Compared with the extenics theory, the results verify the rationality and superiority of the method, which provides a new way for stability evaluation of surrounding rock in tunnel .

关 键 词：隧道 围岩稳定性 改进熵权 属性识别 模型 

分 类 号：TU457[建筑科学—岩土工程]