基于分布式传感光纤的隧道二次衬砌全寿命应力监测方法
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摘要
应用气吹灌浆铺设技术将分布式光纤传感器埋入二次衬砌混凝土内部,并将光纤传感器时变应力场监测结果与施工初期埋入的传统传感器初始应力场叠加,得到隧道二次衬砌的长期真实应力水平;通过对采用气吹灌浆铺设的光纤传感器进行标定试验,对二次衬砌长期应力场的监测断面进行应力水平分析,提出将时间序列分析方法应用于所有监测断面健康状态评估。结果表明:所提出的方法能够实现对隧道二次衬砌的全寿命健康诊断与评估。
Distributed optical fiber sensors were embedded into secondary lining concrete by air-blowing and vacuum grouting technology.The initial stress field and time-varying stress field of secondary lining were established respectively by using traditional sensors and monitoring of distributed optical fibers.The long-term true stress level which was used to diagnose secondary lining was calculated by adding initial stress field to time-varying stress field.Calibration experiment of optical fiber sensor was carried out.Stress level of monitoring section of long-term secondary lining stress field was analyzed.The feasibility of health state assessment of monitoring section by using method of time series analysis was discussed.Research results can realize whole life health diagnosis and evaluation for tunnel secondary lining.
Distributed optical fiber sensors were embedded into secondary lining concrete by air-blowing and vacuum grouting technology.The initial stress field and time-varying stress field of secondary lining were established respectively by using traditional sensors and monitoring of distributed optical fibers.The long-term true stress level which was used to diagnose secondary lining was calculated by adding initial stress field to time-varying stress field.Calibration experiment of optical fiber sensor was carried out.Stress level of monitoring section of long-term secondary lining stress field was analyzed.The feasibility of health state assessment of monitoring section by using method of time series analysis was discussed.Research results can realize whole life health diagnosis and evaluation for tunnel secondary lining.
引文
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[14]李东升,李宏男.埋入式封装的光纤光栅传感器应变传递分析[J].力学学报,2005,37(4):435-441.LI Dong-sheng,LI Hong-nan.Strain TransferringAnalysis of Embedded Fiber Bragg Grating Sensors[J].Chinese Journal of Theoretical and AppliedMechanics,2005,37(4):435-441.
[2]王铁梦.工程结构裂缝控制[M].北京:中国建筑工业出版社,1997.WANG Tie-meng.Control of Cracking in EngineeringStructure[M].Beijing:China Architecture and Build-ing Press,1997.
[3]罗方.地质雷达在隧道健康诊断中的应用[J].长安大学学报:自然科学版,2006,26(3):51-54.LUO Fang.Application of Geological Radar in HealthDiagnosis of Tunnel[J].Journal of Chang an Univer-sity:Natural Science Edition,2006,26(3):51-54.
[4]李永鸿,徐光黎,杨银湖,等.地震反射波法技术及其在隧道超前地质预报中的应用研究[J].岩土工程学报,2005,27(10):1180-1184.LI Yong-hong,XU Guang-li,YANG Yin-hu,et al.Application of Earthquake Refracted Wave Method toGeological Prediction for Tunneling[J].Chinese Jour-nal of Geotechnical Engineering,2005,27(10):1180-1184.
[5]李丹,李川,赵永贵,等.地震CT与FBG传感器技术在隧道结构诊断中的应用[J].工程地质学报,2008,16(6):839-843.LI Dan,LI Chuan,ZHAO Yong-gui,et al.Applicationof Seismic CT and FBG Sensor Techniques to TunnelStructure Diagnosis[J].Journal of Engineering Geol-ogy,2008,16(6):839-843.
[6]施斌,徐学军,王镝,等.隧道健康诊断BOTDR分布式光纤应变监测技术研究[J].岩石力学与工程学报,2005,24(15):2622-2628.SHI Bin,XU Xue-jun,WANG Di,et al.Study onBOTDA-based Distributed Optical Fiber Strain Meas-urement for Tunnel Health Diagnosis[J].ChineseJournal of Rock Mechanics and Engineering,2005,24(15):2622-2628.
[7]MENDEZ A,THEODORE F M,MENDEZ F.Appli-cation of Embedded Optical Fiber Sensors in Re-inforced Concrete and Structure[C]//SPIE.SPIEProceeding Paper.Los Angeles:SPIE,1990:60-63.
[8]金伟良,宋志刚,赵羽习.工程结构全寿命可靠性与灾害作用下的安全性[J].浙江大学学报:工学版,2006,40(11):1862-1868.JIN Wei-liang,SONG Zhi-gang,ZHAO Yu-xi.Life-cycle Reliability of Engineering Structures and Struc-ture Safety Under Hazard Events[J].Journal of Zhe-jiang University:Engineering Science,2006,40(11):1862-1868.
[9]UCHIYAMA H,SAKAIRI Y,NOZAKI T.An Op-tical Fiber Strain Distribution Measurement Instru-ment Using the New Detection Method[J].ANDOTechnical Bulletin,2002(10):52-60.
[10]KWON I B,KIM C Y,CHOI M Y.Distributed Strainand Temperature Measurement of a Beam UsingFiber Optical BOTDA Sensor[J].SPIE,2003(5057):486-496.
[11]金伟良.长距离海底管道分布式光纤传感技术[R].北京:中海石油研究中心,2004.JIN Wei-liang.Distributed Optical Fiber Sensor Tech-nology of Long Distance Submarine Pipeline[R].Bei-jing:China Offshore Oil Corporation Research Cen-ter,2004.
[12]金伟良.基于布里渊时域分析技术在公路隧道结构健康监测系统中的研究[R].杭州:浙江大学,2009.JIN Wei-liang.Tunnel Health Monitoring SystemBased on Brillouin Optical Time-domain Analysis[R].Hangzhou:Zhejiang University,2009.
[13]傅翼,金伟良,粟京,等.海底管道中长距离徼管真空灌浆试验研究[J].新型建筑材料,2005(10):14-19.FU Yi,JIN Wei-liang,SU Jing,et al.ExperimentalStudy on Vacuum Grouting for Long Distance Micro-tubule of Submarine Pipeline[J].New Building Ma-terials,2005(10):14-19.
[14]李东升,李宏男.埋入式封装的光纤光栅传感器应变传递分析[J].力学学报,2005,37(4):435-441.LI Dong-sheng,LI Hong-nan.Strain TransferringAnalysis of Embedded Fiber Bragg Grating Sensors[J].Chinese Journal of Theoretical and AppliedMechanics,2005,37(4):435-441.
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