ASTM D5520-1994(2006)e1 单轴压缩法实验室测定冻结土壤样品蠕变性能的标准试验方法
作者:标准资料网 时间:2024-05-20 11:49:27 浏览:9777
来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:StandardTestMethodforLaboratoryDeterminationofCreepPropertiesofFrozenSoilSamplesbyUniaxialCompression
【原文标准名称】:单轴压缩法实验室测定冻结土壤样品蠕变性能的标准试验方法
【标准号】:ASTMD5520-1994(2006)e1
【标准状态】:现行
【国别】:
【发布日期】:1994
【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】:D18.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:实验室;土壤;拉伸试验;使用;应力;蠕变性能;实验室试验;温度试验;变形;单轴压缩;冻结土壤;单轴压缩;冻结土壤样品;石头;粗石材料;压缩试验;蠕变;相关材料
【英文主题词】:creep;deformation;frozensoil;strain;stress;temperature;uniaxialcompression
【摘要】:Understandingthemechanicalpropertiesoffrozensoilsisofprimaryimportancetopermafrostengineering.Datafromcreeptestsarenecessaryforthedesignofmostfoundationelementsembeddedin,orbearingonfrozenground.Theymakeitpossibletopredictthetime-dependentsettlementsofpilesandshallowfoundationsunderserviceloads,andtoestimatetheirshort-andlong-termbearingcapacity.Creeptestsalsoprovidequantitativeparametersforthestabilityanalysisofundergroundstructuresthatarecreatedforpermanentuse.Itmustberecognizedthatthestructureoffrozensoilinsituanditsbehaviorunderloadmaydiffersignificantlyfromthatofanartificiallypreparedspecimeninthelaboratory.Thisismainlyduetothefactthatnaturalpermafrostgroundmaycontainiceinmanydifferentformsandsizes,inadditiontotheporeicecontainedinasmalllaboratoryspecimen.Theselargeground-iceinclusions(suchasicelenses)willconsiderablyaffectthetime-dependentbehavioroffull-scaleengineeringstructures.Inordertoobtainreliableresults,high-qualityundisturbedrepresentativepermafrostsamplesarerequiredforcreeptests.Thequalityofthesampledependsonthetypeoffrozensoilsampled,theinsituthermalconditionatthetimeofsampling,thesamplingmethod,andthetransportationandstorageprocedurespriortotesting.Thebesttestingprogramcanberuinedbypoor-qualitysamples.Inaddition,onemustalwayskeepinmindthattheapplicationoflaboratoryresultstopracticalproblemsrequiresmuchcautionandengineeringjudgment.1.1Thistestmethodcoversthedeterminationofthecreepbehaviorofcylindricalspecimensoffrozensoil,subjectedtouniaxialcompression.Itspecifiestheapparatus,instrumentation,andproceduresfordeterminingthestress-strain-time,orstrengthversusstrainraterelationshipsforfrozensoilsunderdeviatoriccreepconditions.1.2Althoughthistestmethodisonethatismostcommonlyused,itisrecognizedthatcreeppropertiesoffrozensoilrelatedtocertainspecificapplications,canalsobeobtainedbysomealternativeprocedures,suchasstress-relaxationtests,simplesheartests,andbeamflexuretests.Creeptestingundertriaxialtestconditionswillbecoveredinanotherstandard.1.3ValuesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:13_080_40
【页数】:8P.;A4
【正文语种】:
【原文标准名称】:单轴压缩法实验室测定冻结土壤样品蠕变性能的标准试验方法
【标准号】:ASTMD5520-1994(2006)e1
【标准状态】:现行
【国别】:
【发布日期】:1994
【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】:D18.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:实验室;土壤;拉伸试验;使用;应力;蠕变性能;实验室试验;温度试验;变形;单轴压缩;冻结土壤;单轴压缩;冻结土壤样品;石头;粗石材料;压缩试验;蠕变;相关材料
【英文主题词】:creep;deformation;frozensoil;strain;stress;temperature;uniaxialcompression
【摘要】:Understandingthemechanicalpropertiesoffrozensoilsisofprimaryimportancetopermafrostengineering.Datafromcreeptestsarenecessaryforthedesignofmostfoundationelementsembeddedin,orbearingonfrozenground.Theymakeitpossibletopredictthetime-dependentsettlementsofpilesandshallowfoundationsunderserviceloads,andtoestimatetheirshort-andlong-termbearingcapacity.Creeptestsalsoprovidequantitativeparametersforthestabilityanalysisofundergroundstructuresthatarecreatedforpermanentuse.Itmustberecognizedthatthestructureoffrozensoilinsituanditsbehaviorunderloadmaydiffersignificantlyfromthatofanartificiallypreparedspecimeninthelaboratory.Thisismainlyduetothefactthatnaturalpermafrostgroundmaycontainiceinmanydifferentformsandsizes,inadditiontotheporeicecontainedinasmalllaboratoryspecimen.Theselargeground-iceinclusions(suchasicelenses)willconsiderablyaffectthetime-dependentbehavioroffull-scaleengineeringstructures.Inordertoobtainreliableresults,high-qualityundisturbedrepresentativepermafrostsamplesarerequiredforcreeptests.Thequalityofthesampledependsonthetypeoffrozensoilsampled,theinsituthermalconditionatthetimeofsampling,thesamplingmethod,andthetransportationandstorageprocedurespriortotesting.Thebesttestingprogramcanberuinedbypoor-qualitysamples.Inaddition,onemustalwayskeepinmindthattheapplicationoflaboratoryresultstopracticalproblemsrequiresmuchcautionandengineeringjudgment.1.1Thistestmethodcoversthedeterminationofthecreepbehaviorofcylindricalspecimensoffrozensoil,subjectedtouniaxialcompression.Itspecifiestheapparatus,instrumentation,andproceduresfordeterminingthestress-strain-time,orstrengthversusstrainraterelationshipsforfrozensoilsunderdeviatoriccreepconditions.1.2Althoughthistestmethodisonethatismostcommonlyused,itisrecognizedthatcreeppropertiesoffrozensoilrelatedtocertainspecificapplications,canalsobeobtainedbysomealternativeprocedures,suchasstress-relaxationtests,simplesheartests,andbeamflexuretests.Creeptestingundertriaxialtestconditionswillbecoveredinanotherstandard.1.3ValuesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:13_080_40
【页数】:8P.;A4
【正文语种】:
下载地址: 点击此处下载