ASTM D7498-2009 垂直地带排水大规模应力测试的标准试验方法
时间:2024-05-17 18:47:58 来源: 标准资料网 作者：标准资料网 阅读：8819
【英文标准名称】:StandardTestMethodforVerticalStripDrainsUsingaLargeScaleConsolidationTest
【原文标准名称】:垂直地带排水大规模应力测试的标准试验方法
【标准号】:ASTMD7498-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D35.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:prefabricatedverticalstripdrain;largescaleconsolidation;coefficientofconsolidation
【摘要】:Asthisisatimeintensivetest,itshouldnotbeconsideredasanacceptancetestforcommercialshipmentsofprefabricatedverticalstripdrains.Priortothedevelopmentofverticalstripdrains,whenitwasdesiredtoincreasetherateofconsolidationofacompressiblesoilonaconstructionproject,largediametersanddrainswereinstalled.Verticalstripdrainscanbeinstalledinareaswhereitisdesiredtoincreasetherateofsoilsconsolidationinplaceoftheselargediametersanddrains.Thistestmethodcanbeusedtocomparetheperformanceofverticalstripdrainstothatofsanddrains.1.1Thistestmethodisaperformancetest,whichmeasurestheeffectivenessofverticalstripdrainsonthetimeratesofconsolidationofcompressiblesoilsfromconstructionprojectsites.1.1.1Itisexpectedthatthedesignagencywillberesponsibleforperformingthistest.Itisnotintendedtobeamanufacturerperformedtest.1.2Thistestmethodisapplicabletoallverticalstripdrains.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q81
【国际标准分类号】:93_030
【页数】:6P.;A4
【正文语种】:英语
【英文标准名称】:Cablesforindoorresidentialtelecommunicationinstallations-Screenedcables-Grade3
【原文标准名称】:室内住宅远程通信设施用电缆.屏蔽电缆.等级3
【标准号】:BSEN50441-3-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2006-09-29
【实施或试行日期】:2006-09-29
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电缆护套;布线;通信电缆;通信传输线路;设计;尺寸;电缆;电线;电气工程;电力设备;电气性能;电磁兼容性;室内;信息处理系统;室内电缆;装置;内部;作标记;机械性能;性能;质量控制;住宅区;壳;屏蔽的;单芯电缆;规范(验收);远程通信
【英文主题词】:
【摘要】:ThesecablesareforinstallationinindoorResidentialCablingSystems.Theyarespecifiedupto1000MHz.TheirdesignisbasedontherequirementsoftheEN50290-2-1.TheyarespecificallydesignedforcablinginresidentialenvironmentsupportingICTandBCTapplications.(Telephone,ComputerandTVservices).Thisspecificationdefinestheconstructionaldetailsaswellasthespecificperformancesofthecables.Unlessotherwisespecified,allcablescoveredbythisstandardmaybesubjectedtovoltagesnotmorethan300Va.c.or450Vd.c.andshallmeettheessentialrequirementsofthelowvoltagedirective.Duetocurrentlimitationrelatedtotheconductorcrosssectionalarea,theyarenotintendedfordirectconnectiontomainselectricitysupply.Themaximumcurrentratingperconductorislessthanorequalto3A/mm2unlessotherwisespecifiedintherelevantdetailspecification.
【中国标准分类号】:K13
【国际标准分类号】:33_120_20
【页数】:20P;A4
【正文语种】:英语
【英文标准名称】:Short-circuitcurrentsinthree-phasea.c.systems-Part4:Examplesforthecalculationofshort-circuitcurrents
【原文标准名称】:三相交流系统中的短路电流第4部分:短路电流计算举例
【标准号】:IEC/TR60909-4-2000
【标准状态】:现行
【国别】:国际
【发布日期】:2000-07
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC73
【标准类型】:()
【标准水平】:()
【中文主题词】:效应;电气工程;短路电流;三相电流;电流;交流电流;数学计算
【英文主题词】:
【摘要】:ThispartofIEC60909isatechnicalreportintendedtogivehelpfortheapplicationofIEC60909-0forthecalculationofshort-circuitcurrentsin50Hzor60Hzthree-phasea.c.systems.Thistechnicalreportdoesnotincludeadditionalrequirementsbutgivessupportforthemodellingofelectricalequipmentinthepositive-sequence,thenegative-sequenceandthezero-sequencesystem(clause2)andthepracticalexecutionofcalculationsinalow-voltagesystem(clause3),amedium-voltagesystemwithasynchronousmotors(clause4)andapower-stationunitwithitsauxiliarynetworkfeedingalargenumberofmedium-voltageasynchronousmotorsandlow-voltagemotorgroups(clause5).Thethreeexamplesgiveninclauses3,4and5aresimilartothosegiveninIEC60909(1988)buttheyarerevisedinaccordancewithIEC60909-0,whichreplacesit.Asubclauseisaddedtotheexampleinclause3togiveacomparisonbetweentheresultsfoundwiththeapplicationoftheequivalentvoltagesourceattheshort-circuitlocationfollowingtheproceduregiveninIEC60909-0ontheonehand,andresultsfoundwiththesuperpositionmethodontheotherhand,takingintoaccountdifferentload-flowconditionsbeforetheshortcircuit.Clause6ofthistechnicalreportgivesthecircuitdiagramandthedataofatestnetworkandtheresultsforacalculationcarriedoutinaccordancewithIEC60909-0,toofferthepossibilityforacomparisonbetweentheresultsfoundwithadigitalprogramforthecalculationofshort-circuitcurrentsandthegivenresultsforIk",ip,Ib,Ik,Ik1"andip1inahigh-voltagenetworkwithpower-stationunits,generators,asynchronousmotorsandlinesinfourdifferentvoltagelevels380kV,110kV,30kVand10kV.
【中国标准分类号】:K04
【国际标准分类号】:17_220_01
【页数】:131P;A4
【正文语种】:英语