基于可拓理论及组合权重赋值的铁路隧道衬砌结构分级评价方法研究

Research on Graded Evaluation Method for Lining Structure State of Railway Tunnel Based on Extension Theory and Combined Weight Values

为了对铁路隧道衬砌结构病害进行综合分析,以便科学地评价衬砌结构健康状况,根据铁路隧道衬砌结构评价体系形成的原则,建立了基于可拓理论和组合权重取值方法的铁路隧道衬砌结构状态分级评价体系,细化了分级评价方法的计算流程,在权重取值过程中,采用熵权法和专家意见法相结合,提出一种考虑不同评价等级变化的组合权重赋值方法。以金温货线中湖边一号隧道、小寺一号隧道和魁市隧道衬砌结构状态进行评价,结果表明,三处隧道衬砌结构综合等级特征值分别为3.918、2.544、2.535,评价结果与隧道实际情况较为吻合,表明该方法的可靠性和有效性。

To scientifically evaluate the health of the lining structure through a comprehensive analysis of the structural disease of railway tunnel lining,a graded evaluation system for the structural state of railway tunnel lining was established based on extension theory and combined weight values and in line with the principles of developing an evaluation system of railway tunnel lining structure.The system refined the calculation process for graded evaluation.To obtain the weight values,by combining the entropy method with Delphi method,a method of weight assignment taking into account different grades of evaluation was proposed.On such a basis,an evaluation was given to the lining structure state in Lakeside No.1 Tunnel,Xiaosi No.1 Tunnel,and Kuishi Tunnel in the Jinhua-Wenzhou freight line.According to the results,the eigenvalues of the comprehensive grade of the lining structure in the three tunnels are 3.246,2.544 and 2.535,respectively.The results agree well with the actual tunnel conditions,which verifies the reliability and effectiveness of the method.