多病害耦合作用下地铁盾构隧道单环管片健康度评价方法研究  

Research on Health Evaluation Method of Single Ring Segment of Subway Shield Tunnel Under Multi-Defect Coupling

作　　者：豆海涛[1] 吕延豪[1] 孙雪兵[1] 刘学增[2] 李振 DOU Haitao;LYU Yanhao;SUN Xuebing;LIU Xuezeng;LI Zhen(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Department of Geotechnical Engineering College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]同济大学地下建筑与工程系,上海200092

出　　处：《铁道标准设计》2025年第1期111-119,共9页Railway Standard Design

基　　金：国家自然科学基金项目(52278409)。

摘　　要：传统的单环管片健康度评价方法未考虑多病害耦合作用对结构性能的影响,造成评价结果偏乐观。基于某城市地铁病害统计数据,探讨城市地铁病害主要类型及内在关联,借助数值模拟,提出考虑病害耦合的单环管片承载力预测模型及健康度评价方法,并通过现场应用验证其合理性。主要结论如下:(1)渗漏水、错台、开裂、结构劣化(锈蚀、剥落等)和隧道变形是城市地铁的主要病害类型且各病害关联密切,结构服役性能受多病害耦合影响;(2)不同类型病害耦合影响的管片衬砌在加载条件下的承载性能演化规律、损伤特征以及对各类病害的敏感性存在差异;(3)基于钢筋截面损失率α、裂缝深度与管片厚度比β、剥落区域深度与管片厚度比γ、背后空洞范围m,分别建立钢筋锈蚀-管片开裂、钢筋锈蚀-剥落掉块、背后空洞-管片开裂、管片开裂-剥落掉块共4种病害耦合类型的单环管片承载力预测模型以及健康度评价方法。The traditional single-ring segment health evaluation method does not consider the effect of multi-defect coupling on structural performance,which may lead to optimistic evaluation results.In this paper,based on the defects statistics of a city subway,the main types and internal correlations of urban subway defects are discussed.With the help of numerical simulation,the bearing capacity prediction model and health evaluation method of single ring segment considering defect coupling are proposed,and its rationality is verified by field application.The main conclusions are as follows:(1)Water leakage,misalignment,cracking,structural deterioration(corrosion,spalling,etc.)and tunnel deformation are the main types of urban subway defects,which are closely related,and the service performance of the structure is affected by the coupling of multiple defects;(2)There are differences in the evolution of bearing performance,damage characteristics and sensitivity to various defects of segment lining affected by different types of defect coupling under loading conditions;(3)Based on the steel bar section loss rateα,crack depth to segment thickness ratioβ,spalling area depth to segment thickness ratioγ,cavity range behind m,the bearing capacity prediction model and health evaluation method of single ring segment are established respectively,which are categorized into four coupling types of steel rustsegment cracking,steel rust-spalling falling block,hollow behind segment cracking,segment cracking and spalling falling block.

关 键 词：地铁 盾构隧道 管片 健康度分级 有限元分析 预测模型 承载力 

分 类 号：U231[交通运输工程—道路与铁道工程] U45[建筑科学—桥梁与隧道工程]