盾构隧道火灾损伤技术状况检测与鉴定研究  

A Study on the Detection and Evaluation of the Technical Condition of Fire Damage in Shield Tunnels

作　　者：杜永潇 孙晓立 杨军 张焱森 DU Yongxiao;SUN Xiaoli;YANG Jun;ZHANG Yansen(Guangzhou Municipal Engineering Testing Co.,Ltd.,Guangzhou 510520;Guangzhou Municipal Construction Shareholding Co.,Ltd.,Guangzhou 510030;College of Civil Engineering,Tongji University,Shanghai 200092;Guangdong Provincial Engineering Research Center for Assembled Underground Structure Detection and Monitoring,Guangzhou,Guangdong 510520)

机构地区：[1]广州市市政工程试验检测有限公司,广州510520 [2]广州建筑股份有限公司,广州510030 [3]同济大学土木工程学院,上海200092 [4]广东省装配式地下结构检测与监测工程技术研究中心,广州510520

出　　处：《现代隧道技术》2023年第2期260-270,共11页Modern Tunnelling Technology

基　　金：中国博士后科学基金(2022M720898);广州市建筑集团有限公司科技计划项目([2022]–KJ023,[2020]-KJ019,[2021]-KJ026);广东省住房和城乡建设厅2020年科技计划项目(2020-K9-083374)。

摘　　要：盾构隧道火灾损伤技术状况检测与鉴定是盾构隧道维修加固和安全使用的基础。为实现对火灾后盾构隧道损伤技术状况的有效检测和鉴定,建立了按照现场踏勘、制定检测方案、详细检测和损伤评估分析等分阶段逐级深入的综合评价方法。通过对某区间盾构隧道的案例分析,重点介绍了检测方法与过程、检测结果分析、等级评定体系和处置建议。结果表明,火灾作用导致了混凝土强度推定值的降低,管片碳化深度均在0~2.0 mm之间;通过超声波相控阵法对盾构管片的检测发现,火灾作用对管片内部密实性影响较小。根据检测结果,对盾构隧道分区域进行了等级评定,并提出了相应的处置建议。The detection and evaluation of the technical condition of fire damage is the basis for the maintenance and reinforcement of shield tunnels and their safe use.This paper establishes a comprehensive evaluation method that follows a phased and in-depth process of site investigation,testing program development,detailed testing and damage assessment and analysis,with the objective to achieve the effective detection and evaluation of the technical condition of post-fire damage in shield tunnels.A case study is carried out on a shield-driven running tunnel with a focus on the inspection method and process,inspection result analysis,grading system and treatment recommenda⁃tions.The results show that the action of fire will lead to a reduction in the presumptive strength of the concrete.The carbonization depth of all the segments is between 0 and 2.0 mm,and the inspection of the shield tunnel segments by the ultrasonic phased array method has found that the action of fire has less effect on the internal compactness of the segments.The study further grades the shield tunnel by section and puts forward corresponding recommenda⁃tions for treatments.

关 键 词：盾构隧道 火灾损伤 超声波相控阵法 技术状况评定 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]