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356200912SichuanBuildingScience:2008208207:(1982-),,,,::(JS200616)E-mail:liujinlong1115@sina.com1,1,2,1,1(1.,210009;2.,210009):,,,,,,,,:;;;;:TU431:A:1008-1933(2009)06-091-03AresearchonconcretestructuredefectsdetectionbyGPRLIUJinlong1,LUWeidong1,LUHongwei2,YANGFang1,CAOHua1(1.CollegeofCivilEngineering,NanjingUniversityofTechnology,Nanjing210009,China;2.QualitySupervisionStationofConstructionEngineering,JiangsuProvince,Nanjing210009,China)Abstract:TheprincipleoftheGroundPenetratingRadar(GPR)fortestingconcretestructurewaspresented.Toovercomethedifficultyindeterminingradardiagramwithdefectsundersteelbar,twospecialconcreteslabsweremade,onewithsteelbar,andtheotherwithnosteelbar,forcomparedexperiment.Theimagecharacteristicsofthedefectsundersteelbarandnosteelbarwereshown.Crackinjectedwaterwasalsoparticularstudied.Thenthismethodwasusedtotheengineeringtodetectingdefectsofconcretestructure.ThedrillingverifiedthattheanomalycharacteristicsoftheGPRaccordedwithtruepositionofthedefects.Keywords:radar;GroundPenetratingRadar(GPR);radardiagram;defects;interaction0,[122][327],,,,[829],,,,,,,1,(1MHz1GHz),,,22.1,PVC,(1,2),,1911Fig.1Thedisposalofdefectsofspecimen122Fig.2Thedisposalofdefectsofspecimen22.2RIS22K1600MRIS,,;WIN2DOWS,2.31,2,7,100mm,50mm,4,,,3,4:,,(4)31Fig.3SectionimagesofGPRofspecimen142Fig.4SectionimagesofGPRofspecimen23:,:,1,4:,,,;3,4:,;2.4,1,25,6:,,,(6)51Fig.5SectionimagesofGPRofspecimen162Fig.6SectionimagesofGPRofspecimen25:,;,,6:,,;,,,5,6:,;2.5:;2935,;;;3,,310mm,150mmC30,8@200RIS22K1600M,,,,(7):7Fig.7SectionimagesandresultsofGPRofconcretestructure4,(1),(2),(3),;,:[1].[M].:,1994.[2],,,.[M].:,2006.[3],,.[J].,2004,1(5):4472451.[4],,.GPR[J].,2004,7(4):79280.[5],,,.[J].,2007,24(6):127.[6]BungeyJH,MillardSG,ShawMR.Influenceofreinforcingsteelonradarsurveysofconcretestructures[J].ConstructionandBuild2ingMaterials,1994,8(2):1192126.[7]SchmalzA,LennartzDWachsmuth.AnalysesofsoilwatercontentvariationsandGPRattributedistributions[J].JournalofHydrolo2gy,2002,67:2172226.[8]YooyoungKim.Groundpenetratingradarapplicationfornon2de2structivetestingbridgedeckinspectionanddowelbardetection[D].USA:UniversityofMissouriRolla,2003.[9]Lek2Udom,Sathaporn.InterpretationofGPRdataforconditionas2sessmentofundergroundreinforcedconcretetunnels[D].USA:ClevelandStateUniversity,2005.(85),,,,(3),,,;,,(4),:,,:[1],,.[M].:,1993.[2].[M].:,1994.[3],,.FRP[J].,2003,36(2):46250.[4].Ansys[M].:,2005.[5]Ansys[R].Ansys.392009No16,: