单线铁路隧道衬砌纵向裂缝病害综合评价方法

Method for Comprehensive Evaluation of Longitudinal Crack Defect of Lining of Single-track Railway Tunnels

通过有限元模型计算,分析了铁路隧道衬砌裂缝长度、深度对结构安全的影响规律,并利用正交试验进行了结构安全敏感性分析。在此基础上,建立了基于长度、宽度、深度(比)3个特征参数的衬砌裂缝影响综合评价模型,实现了单线铁路隧道衬砌纵向裂缝病害对衬砌结构安全影响的定量评价,并给出规范评价参考表格。

Through finite element model calculation,the way the length and depth of cracks in railway tunnel lining impact structural safety has been analyzed,and structural safety sensitivity analysis has been conducted through the orthogonal test.On this basis,the comprehensive evaluation model for impact of lining cracks has been established that is based on the 3 characteristic parameters including length,width and depth(ratio),thus it is possible to conduct quantitative evaluation of how longitudinal crack defect of single-track railway tunnel lining impacts lining structure safety and to create the reference table for normative evaluation.