地震CT与FBG传感器技术在隧道结构诊断中的应用
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摘要
针对飞鱼泽隧道的上行线二衬拱顶靠档墙处出现裂缝,经地震CT技术查清隧道上所覆盖岩体的工程地质结构结果表明,沿隧道轴向存在三个岩体破碎带,其中在小里程入口段,岩体完整性较差。在隧道病害治理和隧道健康监测中,经光纤Bragg光栅(FBG)传感器的监测结果表明,松散破碎岩体的地质情况得到了相应的加固。因此,地震CT和FBG两者的检测结论是相互印证的。
This paper examines the cracks appeared in the retaining wall beside the FeiYuze tunnel uplink secondary lining vault.The seismic CT technology was used to investigate the engineering geology structure of the covering rock mass above the tunnel.The results indicate that the rock mass had three fracture zones along tunnel axial and the rock mass quality in the small mileage entrance section was poor.The rock section was treated accordingly.The fiber Bragg grating(FBG) sensor method was further used to monitor the tunnel structure.The results indicate that the loose and fractured rock mass were upgrated well by the applied reinforcements.Therefore,the seismic CT and FBG methods can confirm their examination results..
This paper examines the cracks appeared in the retaining wall beside the FeiYuze tunnel uplink secondary lining vault.The seismic CT technology was used to investigate the engineering geology structure of the covering rock mass above the tunnel.The results indicate that the rock mass had three fracture zones along tunnel axial and the rock mass quality in the small mileage entrance section was poor.The rock section was treated accordingly.The fiber Bragg grating(FBG) sensor method was further used to monitor the tunnel structure.The results indicate that the loose and fractured rock mass were upgrated well by the applied reinforcements.Therefore,the seismic CT and FBG methods can confirm their examination results..
引文
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[4]李世民,张晓培,牛建军,谷成.地震CT技术在隧道工程中的应用[J].探矿工程-岩土钻掘工程,2004,(9):63~65.Li Shiming,Zhang Xiaopei,Niu Jianjun,Gu Cheng.The applica-tion of seismic CTTechnology in tunnelling.Exploration Engineer-ing(Rock&Soil Drilling and Tunneling,2004,(9):63~65.
[5]李川,张以谟,赵永贵,李立京.光纤光栅:原理、技术与传感应用[M].北京:科学出版社,2005,64,162~163.Li Chuan,Zhang Yimo,Zhao Yonggui,Li Lijing.Fiber grating:principles,techniques,and sensing applications.Bei Jing:Sci-ence Press,2005,64,162~163.
[6]Erdogan T.Fiber grating spectra,IEEE[J].Journal of LightwaveTechnology,1997,(15):1277~1294.
[7]Hill K O,Meltz G.Fiber bragg grating technology fundamentalsand overview[J].Journal of Lightwave Technology,1997,15(8):1263~1279.
[8]Hill K O,Fujii Y,Johnson D C et al..Photosensitivity in opticalfiber waveguides:Application to reflection filter fabrication[J].Applied Physics Letters,1978,32(10):647~649.
[1]Meltz G,Morey W W,Glenn W H.Formation of bragg gratings inoptical fibers by a transverse holographic method[J].Optics Let-ters,1989,14(15):823~825.
[10]Hill K O,Malo B,Bilodeau F et al..Bragg gratings fabricatedin monomode photosensitive optical fiber by UV exposure thor-ough a phase mask[J].Applied Physics Letters,1993,(62):1035~1037.
[2]缪仑.CT技术在混凝土超声探伤中的应用[D].长沙:湖南大学,2001.Miao Lun.The application of CTtechnology in concrete ultrasonictest.Changsha:Hunan University,2001.
[3]肖宽怀,孙宇,范明外,向昌阳.地震CT技术在大风垭隧道地质病害诊治中的应用[J].地球物理学进展,2004,19(3):678~683.Xiao Kuanhuai,Sun Yu,Fan Mingwai,Xiang Changyang.Seis-mic tomography used to examine geological hazards in the tunnelsof Kunming-Shilin highway.Progress in Geophysics,2004,19(3):678~683.
[4]李世民,张晓培,牛建军,谷成.地震CT技术在隧道工程中的应用[J].探矿工程-岩土钻掘工程,2004,(9):63~65.Li Shiming,Zhang Xiaopei,Niu Jianjun,Gu Cheng.The applica-tion of seismic CTTechnology in tunnelling.Exploration Engineer-ing(Rock&Soil Drilling and Tunneling,2004,(9):63~65.
[5]李川,张以谟,赵永贵,李立京.光纤光栅:原理、技术与传感应用[M].北京:科学出版社,2005,64,162~163.Li Chuan,Zhang Yimo,Zhao Yonggui,Li Lijing.Fiber grating:principles,techniques,and sensing applications.Bei Jing:Sci-ence Press,2005,64,162~163.
[6]Erdogan T.Fiber grating spectra,IEEE[J].Journal of LightwaveTechnology,1997,(15):1277~1294.
[7]Hill K O,Meltz G.Fiber bragg grating technology fundamentalsand overview[J].Journal of Lightwave Technology,1997,15(8):1263~1279.
[8]Hill K O,Fujii Y,Johnson D C et al..Photosensitivity in opticalfiber waveguides:Application to reflection filter fabrication[J].Applied Physics Letters,1978,32(10):647~649.
[1]Meltz G,Morey W W,Glenn W H.Formation of bragg gratings inoptical fibers by a transverse holographic method[J].Optics Let-ters,1989,14(15):823~825.
[10]Hill K O,Malo B,Bilodeau F et al..Bragg gratings fabricatedin monomode photosensitive optical fiber by UV exposure thor-ough a phase mask[J].Applied Physics Letters,1993,(62):1035~1037.
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