GB/T 50964-2014 小型水电站运行维护技术规池-英文

专用

人人文库

NATIONALSTANDARD

OFTHEPEOPLESREPUBLICOFCHINA

TechnicalSpecificationforOperationandMaintenance

ofSmallHydropowerStations

GB/T50964-2014

ChiefDevelopmentDepartment:MinistryofWaterResourcesofthePeoplesRepublicofChina

ApprovalDepartment:MinistryofHousingandUrban-RuralDevelopment

ofthePeoplesRepublicofChina

ImplementationDate:October1，2014专用

人人文库

ChinaPlanningPress

Beijing2018

ChineseeditionfirstpublishedinthePeoplesRepublicofChinain2014

EnglisheditionfirstpublishedinthePeoplesRepublicofChinain2018

byChinaPlanningPress

rd

3Floor，CTower，GuohongBuilding专用

No.A11，Muxidi-Beili，XichengDistrict

Beijing，100038

www.jhpress.com

PrintedinChinabyFactoryattachedtoBeijingInstituteofGraphicCommunication

©2014byMinistryofHousingandUrban-RuralDevelopmentof

thePeoplesRepublicofChina

Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformor

byanymeans，graphic，electronic，ormechanical，includingphotocopying，recording，

oranyinform人人文库ationstorageandretrievalsystems，withoutwrittenpermissionofthepublisher.

Thisbookissoldsubjecttotheconditionthatitshallnot，bywayoftradeorotherwise，belent，

resold，hiredoutorotherwisecirculatedwithoutthepublisherspriorconsentinanyformof

blindingorcoverotherthanthatinwhichthisispublishedandwithoutasimilarcondition

includingthisconditionbeingimposedonthesubsequentpurchaser.

ISBN978-7-5182-0809-8

中华人民共和国住房和城乡建设部公告

第1128号

住房城乡建设部关于发布小型水力发电站

《

设计规范等两项国家标准英文版的公告

》

现批准小型水力发电站设计规范小型水电站运行维护技术规范

《》GB50071-2014、《》GB/T

两项工程建设国家标准英文版工程建设标准英文版与中文版出现异议时以中文版为

50964-2014。，

准

。

该两项工程建设标准英文版由中国工程建设标准化协会统一组织出版发行

。

中华人民共和国住房和城乡建设部

专用2016年6月6日

人人文库

IntroductiontoEnglishVersion

DepartmentofInternationalCooperation，ScienceandTechnologyofMinistryofWaterResources

（MWR），P.R.Chinahasthemandateofmanagingtheformulationandrevisionofwatertechnology

standardsinChina.

TranslationofthespecificationfromChineseintoEnglishisorganizedbyDepartmentofInternational

Cooperation，ScienceandTechnologyofMWRinaccordancewithdueproceduresandregulationsapplicable

inthecountry.

Technical

ThisEnglishversionofspecificationisidenticaltoitsChineseoriginalGB/T50964-2014

SpecificationforOperationandMaintenanceofSmallHydropowerStations

，whichwasformulatedunderthe

auspicesofMinistryofHousingandUrban-RuralDevelopment（MOHURD），P.R.China.

TranslationofthisspecificationisundertakenbyNationalResearchInstituteforRuralElectrificationof

MWR.

TranslationtaskforceincludesLiZhiwu，RaoDayiandZhangHua.

ThisspecificationisreviewedbySunFeng，ChengXialei，ZhengRugang，QiaoShishan，Meng

Zhimin，WangYicheng，andWuSuhua.专用

DepartmentofInternationalCooperation，ScienceandTechnology

MinistryofWaterResources，P.R.China

人人文库

Foreword

AccordingtotherequirementsofDocumentJianBiao［2008］No.105issuedbyMOHURD-“Noticeon

PrintingtheDevelopmentandRevisionPlan（SecondBatches）ofNationalEngineeringConstruction

TechnicalSpecificationforOperationandMaintenanceofSmall

Standardsin2008”，GB/T50964-2014

HydropowerStations

isformulated.

Thisspecificationcomprises6chapterswiththemainlycontentsasfollows:generalprovisions，basic

stipulations，hydraulicstructures，metalstructures，electro-mechanicalequipment，andoptimizedoperation.

MOHURDisresponsiblefortheadministrationofthisspecification，andMWRfordaily

administration.SpecifictechnicalcontentsinthisspecificationareinterpretedbyBureauofRural

HydropowerandElectrificationDevelopmentofMWR.Ifthereisanyadviceorsuggestioninapplicationof

thisspecification，pleasemailtoBureauofRuralHydropowerandElectrificationDevelopmentofMWR

（No.2，Lane2，BaiguangRoad，XichengDistrict，Beijing100053）.

ThisspecificationischieflydraftedbyBureauofRuralHydropowerandElectrificationDevelopmentof

MWR，andNationalResearchInstituteforRuralElectrificationofMWR.

ThisspecificationisjointlydraftedbyGuangshaConstructionGroup专用Co.，Ltd.

ChiefdraftersofthisspecificationareChengXialei，TianZhongxing，LiuZhongmin，LiZhiwu，Xu

Wei，FanXinzhong，LinYanfei，ZhaoJianda，CaiFulin，SunYaqin，GeHandong，ChenYexing，Wang

JianpingandLiChao.

ChiefexaminersofthisspecificationareYangYingdan，SunCongyan，GuoTao，LiJianguo，Yang

Tierong，TangShansong，LuRonghua，QiuJianghai，PanHaijun，SunHongbinandJiangMeiwu.

人人文库

Contents

………………

1GeneralProvisions（1）

………………

2BasicStipulations（2）

………………………

2.1OperationandManagement（2）

…………………

2.2SafetyOperation（3）

………………………

2.3OverhaulandMaintenance（4）

……………

3HydraulicStructures（5）

…………………

3.1RetainingandDischargeStructures（5）

…………………

3.2IntakeStructures（6）

……………

3.3ConveyanceStructures（6）

………………………

3.4PowerhouseandSubstation（7）

…………………

4MetalStructures（9）

………………………

4.1Penstock（9）

………………………

4.2GateandItsLiftingDevice（9）

………………………

4.3Trashrack（10）

………专用…………

5Electro-mechanicalEquipment（11）

…………………………

5.1Turbine（11）

………………………

5.2Generator（14）

…………

5.3SpeedGoverningSystem（19）

………………

5.4ExcitationSystem（20）

…………………

5.5MainValveandOverheadCrane（21）

………………………

5.6Water，OilandAirSystems（23）

……………………

5.7Transformer（25）

……………

5.8SwitchgearInstallation（27）

…………………

5.9RelayProtectionandSupervisionandControlSystem（30）

……………

5.10DirectCurrentSystem（31）

………………

5.11LightningProtectionandGrounding（32）

…………………

5.12Communication（32）

……………

6OptimizedOperation（33）

人人文库………………

6.1GeneralStipulations（33）

………………………

6.2In-plantOptimizedOperation（34）

………

6.3OptimizedOperationforCascadePowerStation（34）

………………

ExplanationofWordinginThisCode（35）

……………

ListofQuotedStandards（36）

1GeneralProvisions

1.0.1

Thisspecificationisformulatedwithaviewtoenhancethemanagementforsmallhydropowerstations

（hereinafterreferredtoaspowerstations），improvethelevelofproductionandmanagementandfinally

achievepowerstationsafetyandoptimizedoperation.

1.0.2

Thisspecificationisapplicabletopowerstationswithatotalinstalledcapacityoforlessthan

50MW.

1.0.3

Provisionsstipulatednotonlyinthisspecificationbutalsointheprevailingnationalstandardsshall

becompliedwithfortheoperationandmaintenanceofpowerstations.

专用

人人文库

·1·

2BasicStipulations

2.1OperationandManagement

2.1.1

On-siteoperationcodeshallbeformulated，revisedandreviewedintimebypowerstationoperationand

managementorganizations，concerningwiththerealsituationofthepowerstationaswellastherequirements

ofthisspecification，inordertoensurethesuitabilityandguidanceoftheoperationcode.

2.1.2

Thepowerstationshallappointoperation，maintenanceandadministrativestaffforstationsafety，as

wellasestablishandimprovetheresponsibilitysystemforeachworkpost.

2.1.3

Administratorsofthepowerstationshallbefamiliarwiththeproductionprocessofthepower

station，andmastertechnicalparameters，operationalrequirementsandsafetyoperationcodesofthe

equipment.

2.1.4

Operationandmaintenancestaffshallreceiveinductiontrainingandgetcertificates.Atleastone

testperyearontheoperationsafetycodeorpracticaloperationshallbeconductedforoperatorsofthepower

station.

2.1.5

Operationandmaintenancestaffshallknowtheproductionproces专用softhepowerstation，masterthe

technicalrequirementsforoperationandmaintenanceaswellascomplywiththesafeoperationcode.

2.1.6

Operationandmaintenancestaffshallstrictlycomplywithworkandoperationsheetsaswellasduty

shifting，inspectiontour，andregularequipmenttestingandrotationsystems，inwhichthequalificationrate

andimplementationrateofworkandoperationsheetsshallbothreach100%.

2.1.7

Ifanyabnormalrunningofthepowerstationsequipmentisfound，operationandmaintenancestaff

shalldecreasetheloadofunitsorstoptheequipmentforinspectionpromptly，thenreporttothedispatching

center.Administratorsshalldulyanalyzethecauses，makereportandorganizerelevantpeopletosolvethe

problems.Anyimportantcasesconnectedwithsafetyshallbereportedtothesuperiorcompetentdepartment

intime.

2.1.8

Asoundfilemanagementsystemshallbesetupinthepowerstation.Alltechnicalmaterials

includingoperation，overhaulanddetectionrecordsaswellastestreportsshallbesortedout，analyzedand

archivedintime.

2.1.9

Theequipmentdefectsmanagementsystemshallbestrictlycompliedwithinthepowerstation.The

eliminationrateforannualequipmentdefectsshallreach100%.

2.1.10

Testingan人人文库dratingoftheequipmentinthepowerstationshallbeconductedaccordingtothe

provisions，andtheintactrateshallreach100%，ofwhichnolessthan80%shallreachClass1intactrate.

2.1.11

Grid-connectedpowerstationsshallcomplywiththedispatchingcodeandrelevantrulesofthe

localgrid，inordertoensurethepowerstationandgridrunsafelyandstably.Thepowerstationshallberun

accordingtotheplanofthegriddispatchingorganizationanditsstipulatedvoltagerange，andthepowerand

voltageadjustedonthebasisofdispatchingorders.Thepowerstationequipmentoverhaulshallcomplywith

unifiedarrangementsmadebythedispatchingorganization.

2.1.12

Anannualreservoircontrolandoperationplanshallbecompiledonthebasisofapproveddesign

floodcontrolstandardandreservoirdispatchingprinciplesofthepowerstation，andthensubmittedfor

approval.Thepowerstationshallalsocomplywithunifiedordersmadebythefloodcontrolorganization.

·2·

2.1.13

Watermanagementcode，hydraulicobservationcode，hydraulicmaintenancecode，hydraulic

machineryoperationandoverhaulcode，hydraulicoperationsafetycodeshallbecompiled，aswellasflood

controlpostresponsibilitysystem，inspectionsystemduring，beforeandafterthefloodseason，hydrological

reportingsystemandannualfloodcontrolsummarysystemformulatedaccordingtotheactualsituationofthe

powerstation.

2.2SafetyOperation

2.2.1

Asafetyproductionmanagementsystemshallbeformulated，andasafetyproductionresponsibility

systemestablishedandcarriedoutinthepowerstation.

2.2.2

Inthehandlingofaccidents，theprincipleofnotoleranceofaccidentswithoutclearidentificationof

causes，thepersonresponsiblefortheaccidentuntreated，unimplementationofrectifiedmeasuresorrelevant

peoplewithoutdrawinganylessonsshallbeadheredto.

2.2.3

Anemergencymechanismshallbesetup，andanemergencyplan，whichshallbesubmittedtothe

relevantdepartmentforapproval，shallbecompiledonaccountofmajorhazardsourcesinthepowerstation

andtherequirementsofcompetentauthorities.Trainingandemergencyresponsedrillsshallbecarriedout

regularly.

2.2.4

On-sitesafetyinspectionsshallbecarriedoutaccordingtotherequirementsofthesafetyinspection

systemofthepowerstation.Anysafetyproblemsdiscoveredshallbereso专用lvedduringtheinspections.Any

unsolvedproblemsshallbereportedtotherelevantresponsiblepersonpromptly，andpreventionandcontrol

measuresshallbeformulated.Inspectionandrectificationshallberecordedandarchived.

2.2.5

SafetyDayactivitiesofthepowerstationshallberegularlyorganizedandwellrecorded.

2.2.6

Safetyproductiontrendsofthepowerstationshallbeanalyzed，accidentlessonsandweaklinkof

productionmanagementsummarizedaswellaspreventivemeasuresformulated.

2.2.7

Trainingonsafetyshallbearrangedasapartoftheannualeducationandtrainingplanofthepower

stationandstrictlyimplementedaccordingtothisplan.

2.2.8

Theequipmentandfacilitiesinthepowerstationshallbenamed，numberedandidentifiedaccordingto

relevantstipulations.

2.2.9

Aworksheetortelephoneverbalordershallberequiredforworkingonhighvoltage（HV）

equipment.OnlytwoormorepeoplecanworkontheHVequipment，andorganizationalandtechnical

measuresforguaranteeingsafetyshallbedonewell.

2.2.10

Forswitchingoperation，switchopeningandclosingwithload，switchclosingwithgroundwire

（earthswitch），groundwirearticulation（earthswitchclosing）withpower，circuitbreakerclosinginerror

andwrongentryto人人文库HVcompartmentsshallbeprevented.Afterelectricalequipmenthastripped，itshallnot

beswitchedonforoperationbeforethecausehasbeenfound.

2.2.11

Powerstationsshallbepreparedforfireandexplosionwork，andequippedwithfireprotection

equipmentaccordingtorelevantstipulations，whichshallbeinspectedandchangedregularlyinorderto

ensuretheyareintactandqualified.

2.2.12

Safetyequipmentandtoolsshallbeequipped，keptandstoredandtestedregularlyaccordingtothe

stipulations.Protectiveclothingandrequisitesforworkersshallbeavailable，inspectedandusedin

accordancewithrelevantstipulations.

2.2.13

Asafetyagreementshallbesignedforthecontractedworksbetweenthepowerstationownerand

thecontractor.Beforethecontractorentersthesite，theoverhaulmanagementfilescompiledbythecontractor

·3·

shallbereviewedandsafetytrainingcarriedoutbythepowerstation.Onlystaffpassingexamsmayenterthe

overhaulsite.Thecontractor’sspecialon-siteoperationworkersshallhavevalidqualificationcertificates，

andtheequipmentandmeterstheyuseshallmeetrelevantsafetyandtechnicalstipulations.

2.2.14

Theoperationalwaterlevelofhydraulicstructures，risingandfallingspeedofthereservoirwater

levelandliveloadshallmeetthedesignrequirements，andbeoperatedandmanagedaccordingtothe

reservoiroperationdispatching.

2.3OverhaulandMaintenance

2.3.1

Overhaulofthepowerstationequipmentshallsatisfytherelevantprovisionsintheprevailing

GuideofMaintenanceManagementforHydropowerStationEquipments

ministerialstandardofDL/T1006.

2.3.2

ThepowerstationequipmentshallbeoverhauledregularlywithanintervalstipulatedinDL/T

1006.Equipmentoverhaulperiodshallbearrangedreasonablyaccordingtofactorssuchasthefeaturesofthe

riverrunoff，andshouldbepreferablycarriedoutinthedryseason.

2.3.3

Anequipmentoverhaulandmaintenancecodeoroverhaulworkguideshallbecompiledforthe

powerstation.Duringtheoverhaul，examinationandacceptanceforqualitycontrolpointsofkeyprocessshall

bedonewell.

2.3.4

Forenterprisesissuingcontractsforoverhaul，anoverhaulcontractshallbemadewiththe

contractor.

2.3.5

Thepreventivetestsaftertheoverhaulforelectricalequipmentsha专用llmeettherelevantprovisionsin

PreventiveTestCodeforElectricPowerEquipment

theprevailingministerialstandardofDL/T596.

2.3.6

Advancedtechnologyandoverhaultoolsshallbeusedfortheoverhaulofthepowerstation

equipmenttoshortentheoverhaulperiod，andoverhaulmanagementshallbeenhanced.

2.3.7

Toolsandlightingfacilitiesusedforpowergeneratingequipmentandemergencyrepairsshallbe

keptandmaintainedbyspecialstaffaswellasinspectedandtestedregularly.

2.3.8

Acceptanceandtrialoperationshallbecarriedoutafteroverhaulandanoverhaulreportshallbe

submitted.

2.3.9

Aninspectionandmaintenancesystemforhydraulicstructuresinthepowerstationshallbesetup.

Thehydraulicstructuresshallbemonitored，inspected，maintainedandrepairedtoeliminatedefectsor

hiddentroubles.

人人文库

·4·

3HydraulicStructures

3.1RetainingandDischargeStructures

3.1.1

Safetyassessmentorsafetytechnicalidentificationforstructuresinthepowerstationshallbecarried

outregularly.

3.1.2

Themonitoringitemsandtimesshallmeetthedesignrequirements.Themonitoringresultsshallbe

analyzedandarchivedintime.

3.1.3

Hydraulicstructuresshallbeinspectedandtouredbystafffrequentlyorregularly.Aninspection

toursystemshallbesetup，inordertodiscoverdefectsandhiddentroublesintime.Theinspectionshall

includethefollowingcontents.

1

Dambodycracks，slopeleakage，bypassseepage，andabnormalleakageorunusualdisplacementof

permeabledamfoundation.

2

Earthdamslopestability；damcrestflatnessandslopeleveling；nocracks，subsidence，bulges，ant

nestsoranimalcaveswithimpactsonstructuralstabilityorseepageflowsafety；completeslopeprotectionof

damsurfacewithnolocaldefectslikelooseness，subsidenceorslumpin专用g，cushionlossorhollowslope

protection；noleakagepools，subsidencearea，piping，abnormalgrowthofplantsandbackflowscouringin

downstreamsurfaceanddamtoe；noturbidseepagewater.

3

Denudation，abrasionorwaterseepageofconcretedambody；nodisplacementbetweenadjacentdam

monoliths；normalperformanceofexpansionjointsandwaterstop；nocracksthataffectthestructureor

seepagesafety；normalchangeofupliftpressure.

4

Intactstructureofdischargestructures；floodwaywithoutanydamage；noabnormalcracks，

settlementsorseepageinthesteepslopes，sidewallsandinnersurfacesoffloodspillwaysandflood

dischargingtunnels；energydissipationfacilitieswithoutanydamage.

5

Intactnessandnormaloperationofancillaryfacilitiesofretaininganddischargestructures.

3.1.4

Maintenanceandrepairofretaininganddischargestructuresshallbeimplementedaccordingtothe

relevantprovisions.Themaintenanceshallmeetthefollowingrequirements.

1

Damcrest，slope，parapetwallandobservationfacilitiesshallbeintact.Drainditchesshallbe

dredgedinordertokeepthemclear.

2

Materialsshallnotbestackedonthedamcrest，slopeorberm.Thedamsurfaceshallnotbeusedas

atransferdock，and人人文库thecrest，slopeanddamtoeshallnotbeusedaswaterconduits.

3

Onthedamandintheupstreamanddownstreamrangesthatmayaffecttheprojectsafety，activities

harmfultotheprojectincludingdiggingpits，buildingfishpondsanddrillingwellsshallallbeforbidden.

4

Erosionandscouringofthedamsurfacebyrainwatershallbeprevented.Thefilteringfacilitiesof

thedambodyandpressurereliefdevicesbehindthedamshallbemaintainedinordertoensurenormal

operation.

5

Inthesilt-ladenareas，reservoirsandflushingfacilitiesshallbeopenedregularly.Forcoldareas，ice

preventionmeasuresshallbeadoptedforbuildings.

6

Onthedamsurface，noplantsandcropsshallbecultivated，nograzingallowed，noturfspaded，and

noremovalofthesandsandgravelsusedforslopeprotectionandseepagediversionfacilities.

·5·

7

Theconcreteweirswithhydraulicautomaticbalancedgatesshallnotonlymeettherelevant

requirementsforconcretedams，butalsoensuretheopeningandclosingflexibilityoftheflapgates.

8

Thedeflatingdevicesofrubberdamsshallbesafeandreliable.Thedambagshallbeintactand

meettherequirementsofflooddischarging.Electromechanicaldevicesandwater（air）fillingpipesshall

workproperly.

9

Thestructureofthedischargestructuresshallbeintact.Ifthereareabnormalcracks，settlementand

waterseepageinthesteepslopes，sidewallsandinnersurfaces，andtheenergydissipationfacilitiesare

destroyed，dischargingshallbestoppedforemergencyrepair.Forthosethatcannotmeettheconditions

temporarily，analternativedischargingschemeshallbeusedinordertopreventworseningtheaccidentand

createconditionsforemergencyrepair.

10

Thesluicewayofthedischargestructuresshallbekeptclear.Duringdischargingperiods，upstream

driftmaterialsshallbesalvagedpromptly，andraftsandshippingshallbestrictlyforbiddentogetclosetothe

entranceofthestructures.

11

Theauxiliaryfacilitiesoftheretaininganddischargestructuresshallbeinnormaloperation.The

dischargingsluicesandvalvesshallbekeptintactwithnormalhoistingandreliableoperatingpower.

12

Ifthereareanydangerousdefectssuchasabnormalcracks，distortionorwaterseepageinthe

retainingstructures，theyshallbedealtwithpromptly.

3.2IntakeStructures专用

3.2.1

Thelowestoperationalwaterlevelofpressureintakesshallmeetthesubmergeddepthrequirements

oftheintake.

3.2.2

Themaintenanceandrepairofintakestructuresshallmeetthefollowingrequirements.

1

Thesideslopeoftheintake（outlet）shallbestable.

2

Theairholeoftheintakeshallbeunobstructed.

3

Thehoistingchambershallbefreeofdebris，anditswindowsanddoorsingoodcondition.

3.3ConveyanceStructures

3.3.1

Inspectionandpatrollingshallberegularlyconductedforconveyancestructures，especiallyforhigh

slopesthateasilycausegeologicalhazards，andshallbestrengthenedduringtherainyseason.Inspectionand

patrollingshallmeetthefollowingrequirements.

1

Thereshallbenocracks，distortion，leakage，erosion，abrasion，cavitation，carbonizationor

lossofwaterstopfi人人文库lling，etc.，intunnels.Themainstructureshallbestable.Thereshallbenoserious

rockfallorwaterseepageinunlinedtunnels，noseriousconcretespallingorwaterseepageinlined

tunnels.

2

Ifinstabilityorwaterseepageoccursinthehillsideofthetunnelintake（outlet），itshallbedealt

withpromptly.

3

Waterfillingordischarginginthetunnelorpenstockshallstrictlycomplywiththeoperation

specifications.Itisnotallowedtopileheavymaterialsortobuildstructuresonthetopoffree-flowculverts，

oronthetopoffree-flowtunnelswithanoverburdenrockthicknesslessthantripleoftunneldiameters.

4

Themainbodyandsideslopeofthechannelshallbestablewithoutsoil-rockcollapseorbank

failure.

·6·

5

Thereshallbenosiltationinsidethechannel.Thereshallbenoabrasion，liningdamageorserious

waterseepageinthechannelsurface.

6

Ifanopenchannelliesbehindthepressureintake，theopeningoftheintakegateshallbestrictly

controlled.Iftheinflowexceedsthedesignvalue，thesurplusflowshallbedischargedthroughthesideweir.

7

Thebodyandpiersoftheaqueductshallbestablewithoutinclination，cracks，damageorserious

waterseepage.

8

Thesurgechambershallbestableasawhole，withnounevensettlement，seepage，cracks，serious

weatheringdenudation，ordamagedlinings.Thestructureofthesurgechambershallbesafeandreliableto

meettherequirementsofflowstabilizationandsurgeincaseofsuddenloadchange.Ventilationinthesurge

shaft（tank）withheadcovershallbekeptsmooth.

9

Thereshallbenodistortion，damagedlining，waterseepageorsideslopecollapseinthebaseplate

ofthepressureforebay，overflowweirandretainingwall.Thefacilitiesofoverflowanddrainageandsand

flushopeningsshallbeintact.

3.3.2

Maintenanceandrepairofconveyancestructuresshallcomplywiththerelevantprovisions.They

shallmeetthefollowingrequirements.

1

Theancillaryfacilitiesofthesurgechambershallbeintactandtight.Thewaterlevelobservation

facilitiesshallbenormalandreliable.

2

Thetunnelshallbeemptiedforinspectionandoverhaulaswellasclearedregularly.

3专用

Theaverageflowvelocityofthechannelunderdesignflowshallbesmallerthanthepermissible

velocityforthefacingmaterials.Thevelocitiesinthechannelshallmeettherequirementsofnodepositionor

noscouringundersediment-ladenconditions.

4

Ifdamage，cracks，erosionorwaterstopageingoccurintheaqueduct，itshallberestoredor

refurbished.Iftherearecracksordistortionintheaqueductbase，itshallberepairedorreinforced.

5

Iftherearebreachesandwaterleakageintheconveyancestructures，whichaffectthemountain

stability，theyshallbedealtwithpromptly.

3.4PowerhouseandSubstation

3.4.1

Thepowerhouseandsubstationshallbeinspectedandpatrolledregularly.Theinspectionshall

complywiththefollowingrequirements.

1

Overallpowerhouseanditsancillaryfacilitiesshallbeintact.

2

Thereshallberegularinspectionstoseewhethertherearecracksandtheirdevelopmentinthe

concretebeams，platesandpillarsofthepowerhouse.Thereshallbenocracksordamageintheconcrete

piersforturbine-gen人人文库erators（T-G）.

3

Themountainslopesbehindthepowerhouseandsubstationshallbestablewithoutanycollapse.

4

Thebaseandframeworkofthesubstationshallbestable.

3.4.2

Maintenanceandrepairofthepowerhouseandsubstationshallcomplywiththerelevantprovisions.

Theyshallmeetthefollowingrequirements.

1

Thestrengthanddurabilityofconcretestructuresincludingpowerhouse，substation，operating

bridgeandliftingdevicegirdershallmeetrelevantrequirements.If，thereisseriousdistortion，damage，

cracksorwaterseepagewhichthreatensthesafetyofstaffandequipmentinthecomponentsofthe

powerhouse，andlandsliderisksofthemountaininthepowerhousesite，theyshallbedealtwith

promptly.

·7·

2

Ifthefloodcontrolcriteriaofthepowerhousedonotmeettherequirements，engineeringmeasures

shallbeadoptedintime.

专用

人人文库

·8·

4MetalStructures

4.1Penstock

4.1.1

Thepenstockshallmeetthefollowingrequirements.

1

Anti-corrosivecoatingshallbeevenwithoutsloughing.

2

Thereshallbenoobviousdistortion，cracksorwaterseepageinthepenstock.

3

Itshallbeensuredthatthepenstockcanglidefreelyalongtheaxisofthebuttressslideway.

4

Thereshallbebalancedcompressionandnowaterleakageinthemanholeandleak-proofpackingof

thepenstockexpansionjoint.

5

Forthosepenstocksreachinga40yearsservicelife，safetyinspectionaftertheirdepreciationexpiry

shallbecarriedout.

6

Thebasesandstructuresoftheanchorageblocksandbuttressesforthepenstockshallbeintactand

stablewithoutcracks，damage，obviousdisplacementorsettlement.

4.1.2

Maintenanceofpenstocksshallsatisfythefollowingrequirements.

1

Thesurfaceofthepenstockshallreceiveanti-corrosivetreatmentregularly.

2专用

Ifthereisanycorrosion，crackingorinstability，itshallberepairedorreplacedintime.

3

Ifthegapbetweentheburiedpipeandconcreteaswellasrockwhichjointlybeartheload

increases，groutingofthejointsshallbecarriedout.

4

Dampingmeasuresshallbeadoptediftheexposedpipevibrates.

4.2GateandItsLiftingDevice

4.2.1

Normaloperationofthegateshallmeetthefollowingrequirements.

1

Thereshallbenodistortionorcorrosionwithintactsealingandflexiblepulleysinthegate.

2

Ifcorrosionoccursinthemaincomponentsofthegateincludingfaceplate，girderandedgebeam

andradialgatearms，structuralinspectionshallbecarriedoutintime，andthestrengthandrigidityshallalso

berechecked.

3

Thegateshallbesolidandreliableasawhole.Ifover30%ofthegatecomponentsneedtobe

replaced，thewholegateshallbescrappedandreplaced.

4

Theburiedcomponentsofthegateshallbeinspectedandmaintainedregularly.Thetrackswiththe

seriouserosionorw人人文库ithover2mmofunrepairablejointdislocation，aswellastheotherseriouslycorroded，

rustedorcavitatedburiedcomponents，shallbereplaced.

4.2.2

Normaloperationoftheliftingdeviceshallmeetthefollowingrequirements.

1

Reliablestandbypowershallbeprovidedfortheliftingdevice.

2

Theoperationalelectricaldevicesandancillaryfacilitiesoftheliftingdeviceshallbesafeand

reliable.

3

Protectionmeasuressuchasprotectioncoversshallbeadoptedforoutdoorliftingdevices，andthe

operationalelectricaldevicesshallbelocked.

4

Thereshallnotbetwisting，flattening，bending，cage-likedistortion，brokenstrandsandwaveshape

inthewirecableofthefixedwinchhoist.Thewire，strandandcoreofawirecableshallnotbesqueezedout

·9·

ordamaged.Thewirecableshallbekeptlubricated.

5

Theoperationofthehoistshallbesafeandreliable.

6

Thenoiselevelofthehydraulichoistshallnotbeover85dB（A）.

7

Reliableelectricalandmechanicalover-loadsafetyprotectiondevicesshallbeprovidedfor

electricalscrewhoist.

8

Asafetyhandleshallbeinstalledinmanual/electricalormanualscrewhoists.Whenthemanual

deviceofthemanual/electricalhoistisconnectedtothemachine，safetymeasuresshallbeprovidedto

disconnectallcircuits.

4.2.3

Maintenanceofthegateshallsatisfythefollowingrequirements.

1

Aquaticlife，weedsandfilthattachedtothegateandgateslotshallbeclearedtimely.

2

Therotatingcomponentsofthegateshallbekeptlubricated.

3

Fastenersshallbeconnectedreliablywithoutshedding.

4

Duringthefrozenseasonincoldareas，measuresshallbeadoptedtoavoidordecreasetheiceload

onthegate.

5

Aged，worn-out，andrippedwaterstopsshallbereplacedintime.

4.2.4

Maintenanceoftheliftingdeviceshallmeetthefollowingrequirements.

1

Theelectricaldeviceoftheliftingdeviceshallbeintact.

2

Deceleratorandgearsshallberegularlycleared，andhydraulicoilregularlyfilteredandreplaced.

3

Brakingwheelsandbrakescotchsurfacesshallbekeptclean，专用andthebrakeshoegapnormal.

Seriouslywornbrake