ASTM A 769/A 769M-2005 碳和高强度电阻锻焊钢结构型材

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【英文标准名称】:StandardGuideforUseoftheTimeDomainElectromagneticMethodforSubsurfaceInvestigation
【原文标准名称】:次表面探查用时间域电磁法的使用标准指南
【标准号】:ASTMD6820-2002(2007)
【标准状态】:现行
【国别】:
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.01
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:conductivity;electricalmethod;geophysics;resistivity;subsurfaceinvestigation;surfacegeophysics;timedomainelectromagneticmethod;transientelectromagneticmethod
【摘要】:1.1PurposeandApplicationThisguidesummarizestheequipment,fieldprocedures,andinterpretationmethodsfortheassessmentofsubsurfacematerialsandtheirporefluidsusingtheTimeDomainElectromagnetic(TDEM)method.ThismethodisalsoknownastheTransientElectromagneticMethod(TEM),andinthisguideisreferredtoastheTDEM/TEMmethod.TimeDomainandTransientrefertothemeasurementofatime-varyinginducedelectromagneticfield.1.1.1TheTDEM/TEMmethodisapplicabletoinvestigationofawiderangeofsubsurfaceconditions.TDEM/TEMmethodsmeasurevariationsintheelectricalresistivity(orthereciprocal,theelectricalconductivity)ofthesubsurfacesoilorrockcausedbybothlateralandverticalvariationsinvariousphysicalpropertiesofthesoilorrock.Bymeasuringbothlateralandverticalchangesinresistivity,variationsinsubsurfaceconditionscanbedetermined.1.1.2Electromagneticmeasurementsofresistivityasdescribedinthisguideareappliedingeologicstudies,geotechnicalstudies,hydrologicinvestigations,andformappingsubsurfaceconditionsatwastedisposalsites().Resistivitymeasurementscanbeusedtomapgeologicchangessuchaslithology,geologicalstructure,fractures,stratigraphy,anddepthtobedrock.Inaddition,measurementofresistivitycanbeappliedtohydrologicinvestigationssuchasthedepthtowatertable,depthtoaquitard,presenceofcoastalorinlandgroundwatersalinity,andforthedirectexplorationforgroundwater.1.1.3GeneralreferencesfortheuseofthemethodareMcNeill(),KeareyandBrooks(),andTelfordetal().1.2Limitations1.2.1ThisguideprovidesanoverviewoftheTDEM/TEMmethod.Itdoesnotprovideoraddressthedetailsofthetheory,fieldprocedures,orinterpretationofthedata.Numerousreferencesareincludedforthatpurposeandareconsideredanessentialpartofthisguide.ItisrecommendedthattheuseroftheTDEM/TEMmethodbefamiliarwiththereferencescitedandwiththeASTMstandardsD420,D653,D5088,D5608,D5730,D5753,D6235,D6429andD6431.1.2.2ThisguideislimitedtoTDEM/TEMmeasurementsmadeonland.TheTDEM/TEMmethodcanbeadaptedforanumberofspecialusesonland,water,ice,withinaborehole,andairborne.SpecialTDEM/TEMconfigurationsareusedformetalandunexplodedordnancedetection.TheseTDEM/TEMmethodsarenotdiscussedinthisguide.1.2.3TheapproachessuggestedinthisguidefortheTDEM/TEMmethodarecommonlyused,widelyaccepted,andproven.However,otherapproachesormodificationstotheTDEM/TEMmethodthataretechnicallysoundmaybesubstituted.1.2.4Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducation,experience,andshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject''smanyuniqueaspects.ThewordstandardinthetitleofthisdocumentmeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.1.3Precautions1.3.1Itistheresponsibilityoftheuserofthisguidetofollowanyprecautionsintheequipmentmanufacturer''srecommendationsandtoestablishappropriatehealthandsafetypractices.1.3.2Ifthemethodisusedatsiteswithhazardousmaterials,operations,orequipment,itistheresponsibilityoftheuserofthisguidetoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofanyregulationspriortouse.1.3.3......
【中国标准分类号】:A42
【国际标准分类号】:33_100_01
【页数】:15P.;A4
【正文语种】:

标准名称：	松紧螺套
替代情况：	替代HB 5-21-1976 HB 5-22-1976 HB 5-23-1976 HB 5-24-1976 HB 5-25-1976 HB 5-26-1976
发布日期：	1900-01-01
实施日期：	1900-01-01
首发日期：	1900-01-01
作废日期：	1900-01-01
出版日期：	1900-01-01

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