GBT 50145-2007 土的工程分类标准：英文

专用

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NATIONALSTANDARD

OFTHEPEOPLE'SREPUBLICOFCHINA

STANDARDFORENGINEERING

CLASSIFICATIONOFSOILS

GB/T50145-2007

DevelopedbyTheMinistryofWaterResourcesofthePeople'sRepublicofChina

AppovedbyTheMinistryofConstructionofthePeople'sRepublicofChina

ImplementationDateJune1，2008

专用

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ChinaPlanningPress

Beijing2024

ChineseeditionfirstpublishedinthePeoplesRepublicofChinain2008

EnglisheditionfirstpublishedinthePeoplesRepublicofChinain2024

byChinaPlanningPress

th

，，

4FloorCTowerGuohongBuilding

No.A11，Muxidi-Beili，Xicheng专用District

Beijing，100038

PrintedinChinabyBeijinghouchengzemingPrintingTechnologyCo.，Ltd

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©2008bytheMinistryofHousingandUrban-RuralDevelopmentof

thePeoplesRepublicofChina

Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformor

，，，，，，

byanymeansgraphicelectronicormechanicalincludingphotocopyingrecording

oranyinformationstorageandretrievalsystems，withoutwrittenpermissionofthepublisher.

，，，

Thisbookissoldsubjecttotheconditionthatitshallnotbywayoftradeorotherwisebelent

，

resoldhiredoutorotherwisecirculatedwithoutthepublisherspriorconsentinanyformof

blindingorcoverotherthanthatinwhichthisispublishedandwithoutasimilarcondition

includingthisconditionbeingimposedonthesubsequentpurchaser.

ISBN978-7-5182-1708-3

NOTICE

ThisstandardiswritteninChineseandEnglish.TheChinesetextshallbetakenastherulingone

intheeventofanyinconsistencybetweentheChinesetextandtheEnglishtext.

专用

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IntroductiontoEnglishVersion

DepartmentofInternationalCooperation，ScienceandTechnology，MinistryofWaterResources，

P.R.China（hereinafterDICST）hasthemandateofmanagingtheformulationandrevisionofwater

technologystandardsinChina.

TranslationofthisstandardfromChineseintoEnglishisorganizedbyDICSTinaccordancewith

dueproceduresandregulationsapplicableinChina.

TheEnglishversionofthisstandardisidenticaltoitsChineseoriginalGB/T50145-2007

StandardforClassificationofSoil，whichwasformulatedandrevisedundertheauspicesofDICST.

TranslationofthisstandardisundertakenbyNanjingHydraulicResearchInstitute，China

AcademyofBuildingResearch，YangtzeRiverScientificResearchInstituteandXi'anUniversityof

Technology.

TranslationtaskforceincludesFANMingqiao，LIYunhui，WENYanfeng，HUZaiqiang，WANG

Yanli，FUZhongzhi，MINGJingping，YANGJie，ZHANXinjie，SHEHaicheng，HUJing，WANG

Fang，SHIBeixiao，XUKai，ZHOUGanwu，WUYingli，LIXiaomei，WEIKuangminandQIANBin.

ThisstandardisreviewedbyXUZeping，CHENShangfa，QIAOShishan，WUNongdi，GuoJun，

WANGYicheng，BAOShujun，KONGLingwei，XINHongbo，LINenghui，LEIGuohui，JIANG

MingjingandCHANGYuan.专用

DepartmentofInternationalCooperation，ScienceandTechnology，

MinistryofWaterResources，P.R.China

人人文库

AnnouncementoftheMinistryofConstructionofthe

People'sRepublicofChina

No.772

AnnouncementoftheMinistryofConstruction

onPublishingNationalStandard

StandardforEngineeringClassificationofSoils

StandardforEngineeringClassificationofSoilshasbeenappovedasanationalstandardwiththe

numberofGB/T50145-2007，andwillbeimplementedonJune1，2008.TheoriginalChinese

StandardGBJ145-90StandardforClassificationofSoilsissimultaneouslyrepealed.

ThisstandardispublishedanddistributedbyChinaPlanningPressorganizedbytheResearch

InstituteofStandardsandNormsoftheMinistryofConstruction.

专用

MinistryofConstructionofthePeople'sRepublicofChina

December24，2007

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Foreword

AccordingtotherequirementsofDocumentJIANBIAO［2004］No.67issuedbytheMinistryof

Construction-＂NoticeonPrintingandDistributing'theDevelopmentandRevisionPlanofNational

EngineerConstructionStandardsin2004'＂，thisstandardwasrevisedbyNanjingHydraulicResearch

InstitutebasedonGBJ145-90StandardforClassificationofSoils.

Thisstandardincludesfivechapters.Itsmaintechnicalcontentsinclude：generalprovisions；terms，

symbolsanddesignations；basicrequirements；soilclassification；simplifiedsoilidentification，

classificationanddescription.Anappendixisalsoprovided.

Themainrevisionsmadeinthisstandardareasfollows：thecontextsrelevanttospecialsoilsare

removed.Terms，symbolsanddesignationsareadded.Appendix1forbasicdesignationsisremoved；one

subgroupfractionsareincreasedforgravel，twosubgroupfractionsareincreasedforsand；theplasticitychart

withtheliquidlimitscorrespondingto10mmdepthoffallconepenetrationisremoved，alongwithits

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relatedcontexts；andAppendixA：Systemblockdiagramforengineeringclassificationofsoilsisadded.

TheMinistryofConstructionisinchargeoftheadministrationofthisstandard.GeneralInstituteof

WaterResourcesandHydropowerPlanningandDesignofMinistryofWaterResourcesisresponsiblefor

theroutinemanagementofthisstandard.ExplanationofthetechnicalcontentisundertakenbyNanjing

HydraulicResearchInstitute.Alltherelevantorganizationsare专用encouragedtoobtainexperienceinusing

thisstandard，andalsokindlyrequestedtosubmitcommentsandadvices，whenevernecessary，totheNanjing

HydraulicResearchInstitute（Address：223GuangzhouRoad，Nanjing，210029，China）forfuturerevision.

ChiefDevelopmentOrganizations，CoDevelopmentOrganizationsandChiefDraftersofthis

-

Stardand：

ChiefDevelopmentOrganizations：

NanjingHydraulicResearchInstitute

Co-DevelopmentOrganizations：

ChinaAcademy人人文库ofBuildingResearch

ComprehensiveInstituteofGeotechnicalInvestigationandSurveying

BeijingGeotechnicalInstitute

AcademyofRailwaySciences

ResearchInstituteofHighwayofMinistryofCommunications

GeneralBuildingResearchInstituteofChinaMetallurgyGroup

MechanicalIndustrySurveyandDesignInstitute

ChinaInstituteofWaterResourcesandHydropowerResearch

YangtzeRiverScientificResearchInstitute

Xi'anUniversityofTechnology

JilinUniversity

ChiefDrafters：

FANMingqiaoTENGYanjingWUWeiLIUYanhuaLUOMeiyun

WANGYuanXINHongboZHANGWeiWENYanfengGONGBiwei

HUZaiqiangWANGQingTIANXichunandWANGFang

Contents

1Generalprovisions………………（1）

2Terms，symbolsanddesignations………………（2）

2.1Terms…………………………（2）

2.2Symbols………………………（2）

2.3Designations……………………（3）

3Basicstipulations………………（5）

4Soilclassification………………（7）

5Simplifiedidentification，classificationanddescriptionofsoils…………………（9）

5.1SimplifiedIdentificationmethods…………………（9）

5.2Identificationandclassification……………………（10）

5.3Soildescription…………………（10）

AppendixASystemblockdiagramforengineeringclassificationofsoils………（12）

Explanationofwordinginthisstandard……………（14）

专用

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1Generalprovisions

1.0.1Thisstandardisformulatedtounifytheengineeringclassficationofsoilstofacilitatethequalitative

evaluationofsoilcharacteristics.

1.0.2Thisstandardisapplicabletobasicclassificationofsoils.Aspecializedstandardforsoilclassification

maybeformulatedincompliancewiththisstandardtomeettheprofessionaldemandsofrelevant

industries.

1.0.3Inadditiontotherequirementsofthisstandard，theindextestingforsoilclassificationshallalso

complywiththesespecifiedintherelevantcurrentnationalstandards.

专用

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1··

2Terms，symbolsanddesignations

2.1Terms

2.1.1grainsize

Theminimumdiameterofsieveopeningthroughwhichsoilgraincouldpass，orthediameterof

equivalentspherewhichhasthesamevelocityofsoilgrainsettleinstillwater.

2.1.2grainsizedistributioncurve

Acurverepresentsthemasspercentageofsoilgrainfinerthanaspecificgrainsize.

2.1.3constrainedgrainsize

Thegrainsizecorrespondingto60%fineronthecumulativegrainsizedistributioncurveofsoil.

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2.1.4effectivegrainsize

Thegrainsizecorrespondingto10%fineronthecumulativegrainsizedistributioncurveofsoil.

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2.1.5fraction

Agroupofsoilparticleswithacertainrangeofgrainsizedistribution.

2.1.6coefficientofuniformity

Thecoefficientindicatingthedegreeofuniformityofgrainsizes.

2.1.7coefficientofcurvature专用

Thecoefficientindicatingtheshapeofgrainsizedistributioncurve.

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2.1.8gradation

Themassproportionofeachspecialgrainsizegrouptothewhole.

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2.1.9liquidlimit

Thewatercontentboundarybetweenliquidandplasticstatesoffinegrainedsoil.

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2.1.10plasticlimit

Thewatercontentboundarybetweenplasticandsemisolidstatesoffinegrainedsoil.

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2.1.11plasticityindex

Numericaldifferencebetweentheliquidandplasticlimitsoffinegrainedsoil.

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2.1.12plasticitychart

Achartforclassifyingfinegrainedsoils，inwhichtheplasticityindexI（ordinate）isplottedagainst

-P

theliquidlimit（abscissa）.

wL

2.1.13organicsoil

Claysorsiltswithcertainorganiccontent5%≤＜10%specialodorsmellsandhigh

Om（Om），（）

compressibility.

organosoil

2.1.14-

Claysorsiltswithhighorganiccontent≥10%specialodorsmellsandhigh

Om（Om），（）

compressibility.

2.2Symbols

coefficientofcurvature

Cc—；

coefficientofuniformity

Cu—；

2··

d—grainsize；

constrainedgrainsize

d60—；

effectivegrainsize

d10—；

elasticityindex

IP—；

liquidlimit

wL—；

plasticlimit

wP—；

organiccontent.

Om—

2.3Designations

2.3.1Basicdesignations：

B—Boulder；

C—Clay；

Cb—Cobble；

F—Finesoil；

G—Gravel；

H—Highliquidlimi