隧道二衬雷达检测常见缺陷图及形成原因

1009-6825201232-0196-022012-09-171978-1973-1987-710061。U457．2A1GroundPenetratingRadarGPR、、、、、、、。、。。。、。22．11。TT。12。2．2。12。。。。。计算机主机接收机接收天线发射机发射天线图1雷达系统示意图图2雷达检测原理示意图接收天线发射天线地表反射反射波地层地表2、。。櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅3。。1JTGD62-2004S．2．M．2004．3．M．2001．4．J．1998591-97．PrestressedconcretecontinuousbeamcantileverconstructionofQingdaoYijiapierbridgeXUZhi-qiang1HEYan-li2LIJian11．ChinaTransportationRailwaySurveyDesignInstituteLimitedCompanyBeijing1000882．BuildingandDesignResearchInstituteCo．LtdChinaAcademyofScienceBeijing100190ChinaAbstractTakingprestressedconcretecontinuousbeamofQingdaoYijiapierbridgeasanexamplebrieflyintroducedtheusedstandardandthemaintechnicalstandardofcast-in-placecantileverconstructionbridgedesignelaboratedthestructureformandcharacteristicsofcantilevercon-structionbridgeaccumulatedvaluableexperienceforsimilarbridgedesignandconstruction．Keywordsprestressedconcretecontinuousbeamcantileverconstructiondesign·691·3832201211SHANXIARCHITECTUREVol．38No．32Nov．2012、。3、、。3．1。。2。、。1。33。。、。4。。图3二衬背后脱空带图4二衬背后脱空2。55。。图5二衬板缝处的倒三角形脱空图6二衬后部孤石处脱空3。66。、。3．2。、。。。。77。、、。。88。、。图7二衬内部的空洞图8二衬内部脱空3．399。2。。图9二衬中的不密实4。、。1．M．1994．2TB10223-2004S．ThecommondefectimagesandformationcausesoftunneltwoliningradardetectionHEJian-huiLIYou-yunQINShi-weiRoadCollegeChang’anUniversityXi’an710061ChinaAbstractThispapersummarizedandanalyzedthetunnelcommondefectimagesofgeologicalradardetectionandanalyzedtheimagecharac-teristicsanddefectsformationcausesprovidedreferenceforthetechnicalpersonnelindiscriminatingthedefectsoftwoliningdetection．Keywordsgeologicalradartakeoffemptyinanitionleaky·791·3832201211