普速铁路单线直墙式隧道衬砌厚度不足评价标准  

Evaluation Criteria for Insufficient Thickness of Single⁃track Straight⁃wall Lining of Conventional Railway Tunnel

作　　者：朱桂富 叶灿铙 王健伟 李建有 张院生 ZHU Guifu;YE Cannao;WANG Jianwei;LI Jianyou;ZHANG Yuansheng(Zhejiang Jinwen Railway Development Co.Ltd.,Wenzhou Zhejiang 325011,China;China Academy of Railway Sciences Shenzhen Research and Design Institute Co.Ltd.,Shenzhen Guangdong 518054,China)

机构地区：[1]浙江金温铁道开发有限公司,浙江温州325011 [2]铁科院(深圳)研究设计院有限公司,广东深圳518054

出　　处：《铁道建筑》2023年第9期117-120,共4页Railway Engineering

基　　金：浙江金温铁道开发有限公司科技项目(金温它〔2021〕合-A-140)。

摘　　要：采用衬砌加载数值模拟和层次分析法,分析了普速铁路单线直墙式隧道衬砌厚度不足对衬砌抗裂和抗压极限承载力的影响。结果表明:衬砌厚度不足对衬砌抗裂极限承载力的影响小于对抗压极限承载力的影响,且厚度不足并不一定会导致衬砌抗裂极限承载力降低,宜采用抗压极限承载力作为衬砌极限承载力;衬砌厚度不足时极限承载力降至无缺陷时的40%时,结构缺陷极严重。基于此构建两种评定方法,综合考虑两种方法的评定结果确定衬砌厚度不足等级。根据衬砌厚度不足缺陷长度和有效厚度比对极限承载力的影响,结合两种评定方法,建立了基于衬砌厚度不足缺陷长度比和有效厚度比的评价标准。The influence of insufficient lining thickness on the ultimate bearing capacity of crack resistance and compressive of lining was analyzed by numerical simulation of lining loading and Analytic Hierarchy Process.The results show that the influence of insufficient lining thickness on the ultimate bearing capacity of crack resistance is less than that on the ultimate compressive bearing capacity,and the insufficient thickness does not necessarily lead to the reduction of the ultimate bearing capacity of crack resistance.It is advisable to use ultimate compressive bearing capacity as the ultimate bearing capacity of lining.When the lining thickness is insufficient and the ultimate bearing capacity drops to 40%of the one under no defect,the structural defect is extremely serious.Based on this,two evaluation methods are constructed,the insufficient lining thickness level is determined by considering the evaluation results of the two methods.According to the influence of the defect length and effective thickness ratio of insufficient lining thickness on the ultimate bearing capacity,the evaluation criteria based on the defect length ratio and effective thickness ratio of insufficient lining thickness was established.

关 键 词：铁路隧道 衬砌厚度 评价标准 数值模拟 层次分析法 抗压极限承载力 直墙式衬砌 

分 类 号：U451.4[建筑科学—桥梁与隧道工程]