GB 51158-2015 GB51158-2015通信线路工程设计规范:英文

专用

人人文库

NATIONALSTANDARD

OFTHEPEOPLESREPUBLICOFCHINA

CodeforDesignofTelecommunication

CableLineEngineering

GB51158-2015

ChiefDevelopmentDepartment：MinistryofIndustryand

InformationTechnologyofthePeoplesRepublicofChina

ApprovalDepartment：MinistryofHousingandUrbanRural

-

DevelopmentofthePeoplesRepublicofChina

ImplementationDate：Jun1，2016专用

人人文库

ChinaPlanningPress

Beijing2019

ChineseeditionfirstpublishedinthePeoplesRepublicofChinain2016

EnglisheditionfirstpublishedinthePeoplesRepublicofChinain2019

byChinaPlanningPress

rd专用

3Floor，CTower，GuohongBuilding

No.A11，Muxidi-Beili，XichengDistrict

Beijing，100038

PrintedinChinabyBeijingJingyintangGraphicPrintingCenter

©2016byMinistryofHousingandUrban-RuralDevelopmentof

thePeoplesRepublicofChina

Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformor

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

oranyinformationstora人人文库geandretrievalsystems，withoutwrittenpermissionofthepublisher.

Thisbookissoldsubjecttotheconditionthatitshallnot，bywayoftradeorotherwise，belent，

resold，hiredoutorotherwisecirculatedwithoutthepublisherspriorconsentinanyformof

blindingorcoverotherthanthatinwhichthisispublishedandwithoutasimilarcondition

includingthisconditionbeingimposedonthesubsequentpurchaser.

ISBN978-7-5182-1083-1

Foreword

Accordingtotherequirementsof"NoticeonPrintingtheDevelopmentandRevisionPlanof

NationalEngineeringConstructionStandardsin2010"（Jianbiao〔2010〕No.43），issuedbyMinistryof

HousingandUrbanRuralDevelopment，thecodeisdevelopedandcompletedbyChinaInformation

-

TechnologyDesigningandConsultingInstituteCo.，Ltd.（CITC），inconjunctionwiththeparticipating

developmentorganizations.

Extensiveresearchandinvestigationwereconductedduringtheformulationprocessofthe

specifications.Byreferencingandanalyzingbestpracticesandrelevantstandardsbothathomeand

abroadaswellasconsultingwithvariousparties，theworkinggroupconfirmedthelastversionupon

multiplereviewsandexaminations.

Thecodeconsistsof9chapterswiththemaincontentsasfollows：Generalprovisions，

abbreviations，telecommunicationcablelinenetwork，optical，coppercablesandterminalequipment

selection，cablerouteselection，installationofopticalcable，installationofcoppercable，protectionof

optical（copper）cablelines，stationpositionselectionandbuildingrequirements.

Theprovisionsprintedinboldfontarecompulsoryandmustbeenforcedstrictly.

MinistryofHousingandUrbanRuralDevelopmentisinchargeof专用theadministrationofthecode

-

andtheexplanationofthecompulsoryprovisionswhileCITCisresponsiblefortheexplanationof

specifictechnicalcontents.Duringtheimplementationprocessofthecode，suggestionsand

recommendationsarewelcomeandcanbemailedtoCITC.（Address：Building#3，ZhuYuBusiness

Center，No.9，SouthShoutiRoad，HaidianDistrict，Beijing，P.R.ChinaPostalCode：100048）.

TheChiefDevelopmentOrganization，ParticipatingDevelopmentOrganizations，ChiefDrafting

Staff，andChiefExaminersofthecode：

ChiefDevelopmentOrganization：

ChinaInformationTechnologyDesigningandConsultingInstituteCo.，Ltd

ParticipatingDevelopmentOrganizations：

GuangdongPlanningandDesigningInstituteofTelecommunicationsCo.，Ltd.

JiangsuPostsandTelecommunicationsPlanningandDesigningInstituteCo.，Ltd.

ChiefDraftingStaff：

YongtaoHeZhaoxuCuiWanhuChenGuiyueXieBingMaoKezhengFeng

人人文库BeihangChen

ChiefExaminers：

KaiLiangLiangShenRuilinChangXiaodongSunHongqiangZou

WeiboZhangDongmeiHanQiHuangJianqiaoCuiXiaohongLi

XiaoyingLiuKejianYangPengSun

Contents

1GeneralProvisions……………（1）

2Abbreviations…………………（2）

3TelecommunicationCableLineNetwork………（3）

3.1TelecommunicationCableLineNetworkArchitecture………………（3）

3.2TelecommunicationCableLineNetworkDesign……………………（3）

4Optical，CopperCablesandTerminalEquipmentSelection…………………（7）

4.1GeneralPrinciples………………（7）

4.2OpticalCableSelection…………（7）

4.3CopperCableSelection…………（8）

4.4TerminalEquipmentSelection……………………（9）

5CableRouteSelection…………（11）

5.1GeneralPrinciples………………（11）

5.2OpticalCableRouteSelection……………………（11）

5.3CopperCableRouteSelection……………………专用（12）

6InstallationofOpticalCables…………………（13）

6.1GeneralPrinciple………………（13）

6.2InstallationRequirementsforDirectlyBuriedOpticalCables…………（14）

6.3InstallationRequirementsforDuctOpticalCables…………………（16）

6.4InstallationRequirementsforAerialOpticalCables…………………（17）

6.5InstallationRequirementsforUnderwaterOpticalCables……………（21）

6.6Splicing，EntryandTerminationofOpticalCables…………………（25）

6.7InstallationRequirementsforSiliconcorePlasticPipes………………（26）

-

6.8InstallationRequirementsforOpticalCrossConnectionCabinets………（29）

6.9TransmissionDesignCriteriaforOpticalCableLines………………（30）

7InstallationofCopperCables…………………（32）

7.1GeneralPrinciple………………（32）

7.2InstallationRequirementsforDirectlyburiedCables…………………（32）

-

7.3InstallationRequirementsforDuctCopperCables…………………（33）

7.4InstallationRequirements人人文库forAerialCopperCables…………………（33）

7.5InstallationRequirementsforCrossconnectionAreas……………（35）

-

7.6InstallationRequirementsforWiringZones…………（37）

7.7LeadinginCables………………（38）

-

7.8CopperCableSplicing……………（38）

7.9TransmissionDesignCriteriaforCopperCableLines………………（39）

8ProtectionofOptical（Copper）CableLines……………………（41）

8.1Optical（Copper）CableLineProtectionfromStrongElectricityDangers………………（41）

8.2Optical（Copper）CableLineProtectionfromStrongElectricityInterference……………（42）

1··

8.3Optical（Copper）CableLineProtectionfromThundersandLightning…………………（43）

8.4CableLineProtectionfromOtherInfluences………（45）

9StationPositionSelectionandBuildingRequirements………（46）

9.1StationPositionSelectionPrinciples……………（46）

9.2BuildingRequirements…………（46）

ExplanationofWordinginThisCode……………（47）

ListofQuotedStandards…………（48）

Addition：ExplanationofProvisions………………（49）

专用

人人文库

2··

1GeneralProvisions

Thecodeisformulatedwithaviewtostandardizedocumentsontelecommunicationcableline

1.0.1

engineeringdesignandimprovetheengineeringdesignandmanagementoftelecommunicationcable

line.

Thecodeisapplicabletonewconstruction，renovationandextensionoflandtelecommunications

1.0.2

transmissionsystemsforoutdoorcablelineengineeringdesign.

Engineeringdesignsshallbeincompliancewiththenationalfundamentalconstructionguidelines

1.0.3

andpoliciesoneffectiveuseofresources，includingland，energyandrawmaterials.Thespecifications

alsoattachgreatimportancetotheprotectionofhistoricalrelics，naturalenvironmentandlandscape.

Duringtheconstructionoftelecommunicationcablelines，fullconsiderationshallbegiventothe

1.0.4

overallplanning，jointconstructioneffortsandresourcesharingamongmultiplepartiesinordertosatisfy

therequirementsofbuildingaresourceconservingandenvironmentalfriendlysociety.

--

Theengineeringdesignshallensuretheoverallcommunicationqualityofthenetwork，supported

1.0.5

byadvancedtechnology，costeffectivenessandsecurityandreliability.Inaddition，multipledesigns

-

shallbeproposedandcomparedinordertoachieveeconomicefficiencyand专用reduceprojectcosts.

Theengineeringdesignshallbecombinedwithcommunicationdevelopmentplanningtoleverage

1.0.6

theexistinginfrastructureandequipmentofthenetwork.Theconstructionscheme，technologyscheme

andequipmentselectionshallbebasedonthenetworkdevelopmentplanningwithfullconsiderationto

bothmidtermandlongtermdemandanddevelopmentobjectives.

--

Theseismicperformanceofthecommunicationsnetworkshallbeconsideredduringthe

1.0.7

telecommunicationcablelineconstructioninregionswhereover7（inclusive）degreesofseismic

fortificationisrequiredinChina.

Inadditionaltoobservethiscode，besides，telecommunicationcablelineengineeringdesignshall

1.0.8

complywiththenationalactiverelevantstandardsalso.

人人文库

1··

2Abbreviations

AcronyminEnglishFullnameinEnglish

ADSSAllDielectricSelfSupporting

CPNCustomerPremisesNetwork

DPDistributionPoint

FPFlexiblePoint

MDFMainDistributionFrame

ODFOpticalDistributionFrame

OPGWOpticalFiberCompositeOverheadGroundWire

PMDPolarizationModeDispersion

SNService专用Node

人人文库

2··

3TelecommunicationCableLineNetwork

3.1TelecommunicationCableLineNetworkArchitecture

Telecommunicationcablelinenetwork（Figure3.1.1）shallincludelongdistancelines，local

3.1.1-

linesandaccesslines，usingtransmissionmediasuchasopticalcablesandcoppercables.

Corenetwork

AccessAccess

LocallinesLocallines

linesLongdistancelineslines

ChannelLocalLongLongLocalChannel

terminalnodedistancedistancenodeterminal

nodenode

Figure3.1.1Referencemodelforcommunicationsnetworks

Theaccessnetworkpart（Figure3.1.2）shallincludeprimarycables，secondarycablesanduser

3.1.2

dropwires，usingtransmissionmediasuchasopticalcablesandcoppercables.

Treference

Vreference

point

point专用

FPDP

SNCPN

PrimarySecondaryUserdrop

cablescableswires

Accessnetworklines

Figure3.1.2Structureofaccessnetworklines

3.2TelecommunicationCableLineNetworkDesign

Designofopticalcablelinenetworkshallcomplywiththefollowingprinciples：

3.2.1

Opticalcablelinesshallbesafeandreliable，extendingdownwardgraduallytoprovide

1

communicationsservicestoendusers.

Inadditiontosupportthecommunicationsdevelopmentplanning，thecapacityandroutingof

2

theopticalcablelinenetworkshallalsoconsiderlongtermbusinessdemandanddevelopmenttrendsof

-

networkingtechnology人人文库inordertodetermineconstructionscale.

Thenumberoffibersforlongdistanceopticalcablesshallbedeterminedbylongtermdemand，

3-

whilelocalnetworksandaccessnetworksshallbeconfiguredbasedonmidtermdemandwithsufficient

-

redundancyforpotentialdemand.

Designofopticalcablelinesforaccessnetworksshallbeconducteduponthebasisof

4

distributionofserviceaccesspoints，natureofsubscribers，developmentquantity，density，geographical

locationsandtimeframes.Inthemeantime，fullconsiderationshallbegiventovariousfactorsincluding

geographicalenvironment，ductandpoleresources，capacityoforiginalcables，andconstructionmethods

ofbroadbandopticalaccessnetworkswhilstselectingappropriaterouting，topologyandfiber

3··

distributionpatterns.Thiswouldbeinstrumentalinbuildinganetworkthatallowsflexiblearrangement

andscheduling，effectiveutilizationofopticalfibersandinvestmentsavingandsupportsfuture

developmentandnetworkmaintenance.

Whileconstructingnewopticalcable（copper）lines，requirementsforcoconstructionand

3.2.2-

sharingshallbetakenintoconsideration.

Ductmethodsshallbefirstchosenwhenlayingopticalcablelinesincitiesandurbanareas.In

3.2.3

placeswhereductmethodsarenotfeasible，plasticpipeprotection，conduitsorothersuitablewaysmay

beadopted.

Ductordirectlyburiedmethodsshouldbeadoptedwhenlayingopticalcablelinesinnonurban

3.2.4-

areas，whileaerialmethodsmayalsobeappliedaccordingtothelocalnaturalenvironmentand

conditionsofeconomicandsocialdevelopment.

Aerialmethodsmaybeappliedunderthefollowingconditions：

3.2.5

Inareassuchascanyons，deepditchesandvalleys，steepmountainsetc.whereductordirectly

1

buriedmethodscannotguaranteesafety.

Inareaswhereotherexistingfacilities，eitherundergroundoraboveground，createdifficulties

2

forconstruction，ownersoftheoriginalfacilitiesdonotpermitconstructionorcompensationcostsare

excessivelyhigh.

Inareaswhereotherlayingmethodscannotbeadoptedduetoreasonssuchasprotectionofthe

3

environmentandculturalrelics.专用

Inareaswherelongtermconstructioncannotbeconductedduetoplanningforother

4-

constructions.

Inareaswherethegroundsurfaceissinkingandthegeologicalenvironmentisunstable.

5

Inareaswhereconstructioncostsofductordirectlyburiedmethodsaretoohigh，aerialmethods

6

canguaranteethesafetyofthelinesandwhilstmaintainingthelocallandscapeviewandthenatural

environment.

Opticalcablestypemaystayunchangedwhenductordirectlyburiedmethodsareappliedover

3.2.6

longrangeandaerialmethodsareadoptedforspecificlocations.

Opticalcablesacrossriversshouldadoptbridgeducts，conduitsorhanginginstallationmethods.

3.2.7

Whencablelayingcannotusebridgestogetcrossrivers，methodsshallbedeterminedaccordingtothe

followingprinciplesconsideringsiteconditionstoensuresafetyandstability：

Directionaldrillingorunderwateropticalcablesmaybeusedinriverswithsuitableriverbed

1

conditions.Peractualsituations，structureofopticalcablesmaystayunchangedwhenusingdirectional

drillingmethods.

Aerialmethods人人文库maybeadoptedinsteadofunderwaterlayingtoensuresafetyofopticalcables.

2

Thishappensincaseswhereriverbedisunstablesiltingchangessignificantly，otherconstruction

planningexistsalongtheriverroutesortheriverbedsoilisnotappropriateforconstruction.

Theconstructionofcoppercablelinenetworkshalltakeintoaccountthedevelopmenttrend

3.2.8

ofhighspeedaccesstechnologyandopticalaccessreplacingcopperaccesstechnology.Thenetwork

shallbeconstructedbasedonthecapacityoflocalswitchingequipmentwhilstalsoconsidering

scopeofuserdemand，outgoingdirectionofthecables，routingaswellasdistributionareaofthe

cables.

Thedesignofthecoppercablelinenetworkshallcomplywiththefollowingprinciples：

3.2.9

4··

Shallgivefullconsiderationtothedevelopmentofcommunicationstechnology，evaluateand

1

analyzethenecessityofcablenetworkconstruction，andstrictlycontrolthecoveragescopeofcopper

cables.

Thecapacityandroutingofthecoppercablelinenetworkshallbedeterminedinlinewiththe

2

overallcommunicationsplanning，consideringtheneedtomeetrequirementsforanumberofyearsand

additionally，theneedtosupporttheexistingandpotentialprojects.

Shallconsidertheintegrityofthelinenetworkandproactivelyadoptnewtechnologyandnew

3

equipmentinordertomeetthedevelopmentandchangesoftheservicesandtheusersandensurethe

networkisreliable，flexibleandcosteffective.

Ductlayingmethodshallbepreferredincityareasandshallgraduallydeployingtheline

4

networkhiddeninthegroundinordernottodamagethenaturalenvironmentandlandscape.

Thedesignofprimarycablesforusersshallbebasedontheanalysisofuserquantity，

5

geographiesandtimeframe.Technicalmeasuresforsuchaspectsasdifferentdistributionmethods，

routing，capacity，pointofpairsdiminishingandconstructionmethodsshouldbeadoptedsothatthese

cablescanconstituteanetworkthatcanscheduleflexibly，offerhighpairsutilizationrate，save

investmentaswellasfacilitatingfuturedevelopment，operation，andmanagement.

Thecoppercableexpansionsmayonlybeconductedwhentherearenewbusinessrequirements

3.2.10

thatcannotbesupportedthroughadjustingtheexistingnetwork.

Thecapacityofcablesonthesamerouteshallbeplannedoncomprehensive专用basisandsetting

3.2.11

multipleseparatecablesisnotadvised.

Thedistributionofthecoppercablelinenetworkshallgiveprioritytocrossconnecting

3.2.12

methods，supplementedbyfeedthroughandfreedistributionandshouldnotusemultipleconnections.

-

Crossconnectionsshouldadoptonelevelcrossconnectingandapplytofixedcrossconnectingareas.

Thedirectserviceareaswithin500metersaroundthestationsmayadopteitherfeedthroughorfree

-

distribution.Freedistributionmethodsshouldbeusedforfullcoloredallplasticcablelines.Forthe

--

originalexistingcablelines，ifnotmuchadjustmentisneeded，theoriginaldistributionmethodmaybe

maintained.

Multipleconnectionshallnotbeusedforprimarycables，neitherthesecondarycablesthat

3.2.13

adoptcrossconnectingmethods.

Theutilizationrateofeachcablepairsforvarioussectionsinthedesignofcoppercableline

3.2.14

networkshouldcomplywiththespecificationsoutlinedinTable3.2.14.

Table3.2.14Theultimateutilizationrateofcablepairs

人人文库CablelayingsectionsUtilizationrateofthepairs（%）

Telephoneswitchingofficecrossconnectcabinet85-90

-

Crossconnectcabinetterminaldistributionequipmentwithoutmultipleconnecting60-80

-

Telephoneswitchingofficeterminaldistributionequipment60-80

-

Thecablepairsshouldnotdeclinetoofrequently.Forthefollowingsituationstheyshouldnot

3.2.15

decline：

Inareaswhereextensionisdifficult；

1

Inareaswherefuturedevelopmentmaybeplannedandwherethelineequipmentneedstobe

2

flexible.

5··

Inareaswheretheductandpiperesourcesareconstrained.

3

Thecapacityofdistributionequipmentmaybechosenaccordingtofinallycovereduser

3.2.16

quantitymultipliedby1.2to1.5，combinedwiththenominalseriesoftheequipment.

Thepartitionofcablecrossconnectionareashallgiveprioritytothegeographicalconditions

3.2.17

andtheuserquantitycovered.Thedistributionareashallbepartitioned，devisedormergedinlinewith

longtermandshorttermneedandbalancedapproachoftechnologyandeconomy.Itshallconsidernot

--

onlytheadministrationsectionsofcommunityandneighborhoodsunderoverallcityplanning，butalso

theoriginalcrossconnectingareaordistributionarea，distributionandroutingofcablesandoptical

cables.Thescopeofdistributionareasshouldnotexceedthecertainthresholdforthesakeofsecondary

cableshortening.

Thearrangementofcablewireorderanddistributionequipmentshallstartfromfartonear，and

3.2.18

fromsmalltolarge.

专用

人人文库

6··

4Optical，CopperCablesandTerminalEquipmentSelection

4.1GeneralPrinciples

Singlemodulefibershallbeusedinopticaltransmissionnetwork.

4.1.1

Theconfigurationofthenumberoffibersinopticalcablesshallfullyconsiderthenetwork

4.1.2

redundancyrequirements，thefuturesystemtypeexpected，thenumberoftransmissionsystems，

networkreliability，developmentofnewservices，structureofopticalcables，resourcesharingofoptical

fibersandotherfactors.

Fiberinopticalcablesshallpassthefullscreeningfortensionthatshouldbenolessthan0.69GPa.

4.1.3

Basedontheapplications，opticalfibersshouldbeselectedaccordingtothefollowingprinciples：

OpticalcablesforlongdistancenetworksshouldadoptG.652orG.655opticalfibers.

1

OpticalcablesforlocalnetworksshouldadoptG.652opticalfibers.

2

OpticalfibersforaccessnetworksshouldadoptG.652opticalfiberswhilstG.657opticalfibers

3

shouldbeadoptedtomeetspecialmicrobendneed.

Thecapacityofcablesshallbebasedonselectionofappropriatecables，consideringthe

4.1.4

distributionofusersanduserdemandalongwiththenominalseriesofcables专用inordertofullyleverage

thepairutilizationrate.

Multicorecablesshallbeadoptedforductprimarycablesofcablelinenetworkinorderto

4.1.5-

increasethenumberofpairsinoneduct.

4.2OpticalCableSelection

Opticalcablesshouldadoptaloosetube，centraltubestructure，ormayadoptaslottedcore

4.2.1

structureorotherbetterstructures.Thefibersinoneopticalcableshouldbeofthesametypeas

opposedtonotmixedtypes.

Opticalcablelinesshouldadopttheopticalcableswithoutmetalpairs.Accordingtoproject

4.2.2

requirements，inalightningdisturbanceorhighvoltageharmseriousregion，nonmetalcomponent

-

opticalcablesmaybechoseninareaswherelightningorhighvoltagerisksarefrequent.Forareaswhere

termitesandmouseharmseriousproblems，antitermiteandantimouseopticalcablesmaybe

--

considered.

Thesheathstructureofopticalcablesshallbedeterminedaccordingtothelayingenvironment，

4.2.3

layingmethodsand人人文库protectivemeasures，andshallcomplywithfollowingregulations：

DirectlyburiedopticalcablesshouldadopteitherthePEinsideguardlayer+moistureproof

1

armoredlayer+PEoutersheathstructure，orthemoistureprooflayer+PEinsideguardlayer+

armoredlayer+PEoutersheathstructure.

Opticalcablesprotectedbyductorsiliconpipeshouldadopteitherthemoistureprooflayer+

2

PEoutersheathstructureorthemicrotube+microcablestructure.

Aerialopticalcablesshouldadoptthemoistureprooflayer+PEoutersheathstructure.

3

Underwateropticalcablesshouldadoptthemoistureprooflayer+PEinsideguardlayer+

4

steelwirearmoredlayer+PEoutersheathstructure.

7··

Theinnerstationandindooropticalcablesshouldadoptthenonflammablematerialsasthe

5--

outersheath.

Antitermiteopticalcablesshouldadoptthedirectlyburiedopticalcablestructure+anti

6--

termiteoutersheath.

Antimouseopticalcablesshouldadoptthedirectlyburiedopticalcablestructureplusanti

7--

mouseoutersheath.

AerialopticalcablesonpowertowersshouldadopttheOPGWorADSSstructureetc.

8

ThemechanicalpropertiesofopticalcablesshallbeinaccordancewiththosespecifiedinTable

4.2.4

4.2.4.Theadditionalattenuationofopticalfibersshouldbelessthan0.2dBwhenopticalcablesare

undershorttermtensionforceexpected.Afterreleaseoftensionforce，theresidualstrainsshallbeless

-

than0.08%，noobviousresidualadditionalattenuationshouldoccur，andthesheathshallnotcrackas

discernedbythehumaneye.Opticalcablesshallcausenoobviousadditionalattenuationwhenitis

underlongtermtensionforceexpected.

-

Table4.2.4Mechanicalpropertiesofopticalcablesundertensile

forceandflatteningforceexpected

Theminimumcrushforceallowed

Theminimumtensileforceallowed（N）

N/100mm

Layingmethodsandstrengtheninglevels（）

ShorttermLongtermShorttermLongterm

--专用--

Blowingminiatureopticalcable0.5G0.15G150450

Ductandnonselfsupportingaerial11500and1.0G6001500750

--

DirectlyburiedⅠ3000100030001000

DirectlyburiedⅡ4000200030001000

DirectlyburiedⅢ10000400050003000

UnderwaterⅠ10000400050003000

UnderwaterⅡ200001000050003000

UnderwaterⅢ400002000060004000

Note：Greferstotheweightofopticalcablesperkilometer.

4.3CopperCableSelection

ThecablestructuremaybeinaccordancewithTable4.3.1，andshallbeselectedinconsideration

4.3.1

ofengineeringconditions人人文库andapplicationscenarios.

Insulationlayertypeshallbeadoptedaccordingtotheuserrequirements.

1

Aluminumandplasticcompositesheathshallbeadoptedwhenallplasticcablesareused.

2

Fireretardantcablesshallbeadoptedwhenlayingindoorterminalcablesanddistribution

3

cables.

Thediameterofductcablesshallbesuitableforinstallationintheduct.

4

Theworkingenvironmenttemperatureofallplasticcablesshallbebetween-30℃to+60℃

5

whilstspecialneedshallbeconsideredperactualworkingenvironmentwhentemperaturegoesbeyond

thespecifiedrange.

8··

Table4.3.1Usagescenariosformaincabletypes

Cableswithoutersheath

CablesMonolayerDoublelayerMonolayer

SelfDoublelayerMonolayer

Cabletypeswithoutouter-steelbeltsteelbeltthick

supportingsteelbeltthinsteelwire

sheathlongitudinallongitudinalsteelwire

lappinglapping

wrapwraplapping

HYAHYAC—————

HYFA——————

CodesforcableHYPA——————

typesHYAT—HYAT53HYAT553HYAT23HYAT33HYAT43

HYFAT—HYFAT53HYFAT553HYFAT23——

HYPAT—HYPAT53HYPAT553HYPAT23——

MainscenariosDuctaerialAerialBuriedBuriedBuriedUnderwaterUnderwater

Thetypesofthecablesinengineeringdesignshouldnotbetoomany.

4.3.2

Consideringwiththeexistingcablenetworkconditionsandtheactuallocalsituations，allplastic

4.3.3

cablesshouldbeselectedfornewcablelineswhilsttheinflatabletypeshallbeappliedtoductprimary

cables，fillingtypemaybeappliedtoburiedanddistributionductcables，andselfsupportingtypeshall

-

beappliedtoaerialandwallmountcables.专用

-

Aerialcablesshouldnotexceed400pairs.Multicorecableswithover400pairsandimportant

4.3.4-

orspecialcablesshalladopttheundergroundlayingmethod.

Theundergroundlayingmethodmayusetheplasticoutersheathcableslaidinducts，withone

4.3.5

cableineachduct.Whenthecapacityoftheonlycableneededislessthan400pairsandconditionsare

notsuitableforbuildingducts，theburiedmethodcanbeadopted.Theuseofculvertorthemethodof

addingprotectivepipesmayalsobeadoptedaccordingtoactualcircumstances.

Accordingtospecificprojectsituations，distributioncablesmayadopttheblock，street，orindoor

4.3.6

distributionmethod，andshallbegraduallyincorporatedintotheCustomerPremisesNetwork

constructionandtheoverallurbanplanningscheme.Distributioncablesshouldadopttheductlaying

method.

Nonfilledprimarycablesshalladoptinflatingmaintenanceandinstallpressuremonitoring

4.3.7-

system.Pressuresensorsshallbeinstalledinthecablesleeves.

4.4TerminalEquipmentSelection

ODFforoptical人人文库cableterminatingshallsatisfythefollowingrequirements

：

4.4.1

IfthesparecapacityoftheoriginalODFintheequipmentroomcanmeetthecurrentneeds，

1

newODFcannotbeconfigured.

ThecapacityofnewlyconfiguredODFshallbeinlinewiththeterminaldemandofthedrop

2

opticalcables.TheboundarydimensionandcolorofthenewODFshouldbeconsistentwiththe

originalequipment.Terminaltailfibersshallbeofthesametypeasfibersinopticalcables.

ThecentralmetalstrengthmemberfixturedeviceforopticalcablesinODFshallbeinsulated

3

fromtheODF.

9··

Thecapacityofopticalfiberterminaldevicesshallmatchthenumberoffibers.Thecoiling

4

radiusandcapacityofthefibertrayshallbebigenoughforopticalfiberstoinstall.

Theconfigurationofopticalcablecrossconnectingcabinetsshallsatisfythefollowing

4.4.2

requirements：

Opticalcablecrossconnectingcabinetsshallhavearangeoffunctions，includingfixing，

1

protecting，terminating，splicing，andschedulingopticalfibers.

Thecapacityofthenewopticalcablecrossconnectingcabinetsshallbeconfiguredaccordingto

2

themaximumdemandofthefinalplanning，andshallbedeterminedbyreferencingthecommonlyused

capacityseriesforopticalcablecrossconnectingcabinets.

Thecapacityofopticalcablecrossconnectingcabinetsshallmatchthecableterminalsintothe

3

cabinetsandthedemandforcoiling.Theinstallationspaceofotherequipmentsuchasopticalsplitters

shallbereservedwhennecessary.

专用

人人文库

10··

5CableRouteSelection

5.1GeneralPrinciples

Lineroutingschemeselectionsshallbemadeuponcomparisonofvariousschemes，basedonthe

5.1.1

engineeringdesignmandateandoverallplanningofcommunicationsnetworks.Engineeringdesigns

shallensurequalityofcommunications，safetyandreliability，aswellascosteffectivenessofthe

-

networkswhilstfacilitatingconstructionandmaintenance.

Pertheexistingterrain，buildings，facilitiesandestablishedconstructionplanning，theselection

5.1.2

oflineroutingshallgivefullconsiderationtovariousinitiativesbeingplannedbyotherdepartments

includingcity，industrialandminingconstructions，railways，highways，shipping，waterconservancy，

longdistancepipes，andlanduseetc.

-

Incompliancewiththemainroutingdirection，linesshallbeselectedalongtheroadsorstreetsto

5.1.3

keepasstraightaspossiblewhilstavoidingroadsidefacilities，sectionsunderrenovationandareaswith

possiblechemicalcorrosionsandmechanicaldamages.

Theroutinglinesshallbechoseninappropriatesectionsthataregeologicallystableand

5.1.4

relativelyflatwithlimitedearthwork，inordertoavoidpotentialdamages专用fromlandslide，collapse，debris

flow，goafandKarstsurfacecollapse，groundsubsidence，groundfissure，seismicliquefaction，sand

burial，winderosion，salinesoil，collapsibleloessandbankcollapsecausedbynaturalcatastrophesor

humanbehaviors.Inaddition，theroutingshallalsoavoidlakes，swamps，anddrainingfloodzones，

pondsandditchesasmuchaspossible.Inareaswithmanyobstacles，obstaclesshallbebypassed

reasonablyandshouldnotimportunelongstraightline.

Linesshallnotbelaidondamsorunderdamfoundations.

5.1.5

Linesshouldnotbebuiltthroughlargefactoriesandlargeindustrialsitessuchasminingareas.

5.1.6

Whennecessary，linesshalltakeeffectiveprotectionmeasuresconsideringtheimpactonlinesafety.

Ductmethodsshallbeusedasmuchaspossibleforurbanareas.Whenlayinginthefield，lines

5.1.7

shouldnotgothroughvillagesorgoneartownsanddevelopmentzones.Whenthereisneedtodoso，

theimpactsonlocalconstructionplanningshallbeconsidered.

Linesshouldavoidforests，orchardsandothereconomyforestsorshelterbelts.

5.1.8

Theselectionoflineroutingshallconsidertheprotectionofculturalrelicsandtheenvironment

5.1.9

ingeneralwithintheconstructionregions，inordertominimizedisturbanceanddamagesoftheexisting

watersystems，land人人文库surfaceandtheoriginallandscape.

Consideringtheinfluenceofhighvoltage，lineroutingshouldnotchooseareasthatare

5.1.10

vulnerabletolightningandthunderingduetothestrongelectromagneticfield.

Theextensionofoptical（copper）cablenetworksshallconsidertheintegrityofthenetwork

5.1.11

systemandgiveprioritytoaddnewroutingsondifferentroadsinordertoenhancenetworksecurity.

5.2OpticalCableRouteSelection

Thelinesshouldgofromthebridge，whentheopticalcableroutinggoesacrosstheriveranda

5.2.1

permanentsolidbridgemaybeavailableforlayingthelinesnearby.Suitableplacesshallbechosento

11··

deployunderwatercableswhilstconsideringthemainroutingdirection，toensuretheroutingwillnot

deviatetoofar.However，forcomplexandbroadriversorlargeriverswithbusyshippingbusiness，top

priorityshallbeensuringsafetyoftheunderwaterroutes，andpartialdeviationcanbeanoption.

Toensuresecurityastoppriority，directionaldrillingoraeriallayingmethodsmaybeusedtolay

5.2.2

opticalcablelinesacrosstheriver.

Whenopticalcablelinescomeacrossareservoir，opticalcablelinesshallgothroughthe

5.2.3

upstreamofthereservoirandthelayingheightalongthereservoirshallexceedthehighestwaterstorage

level.

5.3CopperCableRouteSelection

Cablesforcitiesandtownsshouldadopttheductlayingmethod.Theconstructionof

5.3.1

telecommunicationsductsintheseplacesshallbeinlinewiththerelevantmunicipalinfrastructureand

undergroundpipelineplanninginordertominimizedamagestothepavementontheroadsurfaceand

reducetheinterferencetothetrafficandthedaytodaylifeofresidentsalongthelines.

Thecapacityofthenewductsandpolesincitiesandtownsshallbeplannedinadvanceandshall

5.3.2

takefullaccountoftheutilizationandsharingoftheexistingductsandpolesamongotherresources.

Theroutingselectionofthecablelinesshallconsidertheintegrityofthenetworksystemsin

5.3.3

conjunctionwiththeprimarycablelineroutingandcabletrunkrouting，whilstfullyleveragingthe

existingfacilitiestoensuresafetycosteffectiveness，flexibilityofthe专用linesandconveniencefor

-

constructionandmaintenance.

Ifcablelinesinevitablygothroughareasaffectedbychemicalsandelectricalerosions，necessary

5.3.4

protectivemeasuresshallbetakenandtheuseofmetalprotectionsheathcablesshouldbeavoided.

Ifthecableroutinginevitablyapproacheshighvoltagepowertransmissionlinesandtheelectrified

5.3.5

railwaysareinparalleloveralongdistance，thedangerousandinterferenceimpactofhighvoltageand

heavycurrentonthecommunicationcablelinesshallnotexceedthespecificationsasdescribedin

Sections8.1andSection8.2ofthiscode.

人人文库

12··

6InstallationofOpticalCables

6.1GeneralPrinciple

Opticalcablesshallbedeployedandinstalledbasedontheenvironmentalconditionsofthe

6.1.1

locationstoensurethatthecablesremainundamaged.Artificialormechanicalinstallationmethodshall

beadoptedpertheactualconditions.

Duringinstallation，specialcautionshallbeexercisedtoavoidwaterfromenteringtheoptical

6.1.2

cablesandspliceclosuresinordertomaintaintheintegrityofopticalcablesheathandensurethatthe

metalprotectionsheathoftheburiedopticalcablesisinsulated.

Theminimuminstallationcurvatureradiusofopticalcablesshallbeinaccordancewiththose

6.1.3

specifiedinTable6.1.3.

Table6.1.3Theminimumcurvatureradiusallowedforopticalcables

TypeA，TypeS，meal

TypesofopticalcablesheathTypeY，TypeA，TypeS，TypeW

sheath

NooutersheathorType

TypeofopticalcableoutersheathType53，54，33，34，and63Type333，Type43

04专用

Staticbending10D12.5D15D

Dynamicbending（e.g.duringinstallation）20D25D30D

Note：Dstandsfordiameter.

Duringinstallation，overlapping，increaseofcablelengthandreservedlengthofopticalcablescan

6.1.4

bedeterminedperactualengineeringpractices，accordingtospecificationsinTable6.1.4.

Table6.1.4Referencevaluesforincreasedandreservedlengthofopticalcables

Layingmethod

ItemsDirectlyAerialUnderwater

Ductmethod

buriedmethodmethodmethod

Reservedlengthofeachjoint5m-10m5m-10m5m-10m—

Increasedlengthfornaturalcurveinmanholeandhandhole—0.5m-1m——

Accordingto

Increasedlengthforcurveinopticalcabletrenchesandducts7‰10‰—

人人文库actualneed

Curveincreasedlengthofaerialopticalcables——7‰-10‰—

Reservedlengthofeachsideinundergroundstations5m-10m，lengthmaybeadjustedaccordingtoactualneed.

Reservedlengthofeachsideingroundstations10m-20m，lengthmaybeadjustedaccordingtoactualneed

Reservedlengthduetowaterconservancy，constructionofroads，

Accordingtotheactualneed

bridgesandotherprojectsbeingplanned

Thediameterofthecablesthroughvarioustypesofpipesshouldnotbemorethan90%ofthe

6.1.5

tubediameter.Thenozzleshallbesealedtightlyafterinstallation.

13··

Opticalcablesshallbearclearandpermanentidentitytobeeasilyidentifiedduringoperationand

6.1.6

maintenance.Inadditiontocharacters，symbolsandbannersprintedontheoutersheathoftheoptical

cables，hangingsignsshallbeaddedtoductandaerialopticalcables，andwarningtapesmaybeaddedto

directlyburiedcables.

6.2InstallationRequirementsforDirectlyBuriedOpticalCables

Theinstallationofdirectlyburiedcablesshallavoidlocationswhereroadsandhousescanbe

6.2.1

builtinthefutureorgroundcanbeexcavatedforconstruction.Areaswherewaterlevelisrelativelyhigh

orsoiliswaterloggedforalongtimeshouldalsobeavoided.

DepthofburiedcablesshallcomplywiththerequirementsspecifiedinTable6.2.2.

6.2.2

Table6.2.2Depthstandardsforburiedcables

LayingsectionsandsoilqualityBuryingdepth（m）

Ordinaryclay，hardclay≥1.2

Gravelsoil，halfstone，weatheredgranite≥1.0

Fullstone，sandflow≥0.8

Suburbs，townsandvillages≥1.2

Sidewalksinurbanareas≥1.0

Stone（hardstone，softstone）0.4belowthedesigndepthofsideditches

Highwaysideditches：专用

Othersoil0.8belowthedesigndepthofsideditches

Highwayshoulder≥0.8

Crossingrailways（fromtherailwaybedsurface），highways（fromthe

≥1.2

pavementbase）

Ditches，ponds≥1.2

RiversPerrequirementsforsubmarinecables

Notes：1Designdepthofsideditchesshouldbeconsistentwiththoserequiredbyhighwayorurbanconstructionauthorities.Depthon

manmadeslottedstonesideditchesmaybereducedto0.4m.Furthermore，antiscourmaterialssuchascementmortarareused

--

tosealtheditches.

2Instoneandhalfstoneregions，100mmthickfinesoilorsandysoilshallbelaidabovethetrenchbottomandabovetheoptical

cables.Thedepthofopticalcablesshalldecreasecorrespondingly.

3Thedepthrequirementsfortundraarenotincludedintheabovetable，anditsburyingdepthshallbeanalyzedseparatelyduring

theengineeringdesign.

Opticalcablesmaybelaidwithothercommunicationopticalcablesorcoppercablesinthesame

6.2.3

ditch，butshallnotbeoverlappedorcrossed.Theparallelspacingbetweentheopticalcablesshouldnot

belessthan100mm.人人文库

Thelayingofopticalcablelinemarkstonesshallmeetthefollowingrequirements：

6.2.4

Opticalcablemarkstonesareburiedinthefollowingplaces：

1

）Opticalcablesplicing，turningpoints，andreservationplaces.

1

）Siliconcoreplasticpipebreakandconnectionpointsforairflowinstallationandburiedman

2

（hand）holepositions.

）Placeswhereobstaclesneedtobesurpassedorwherelongstraightsectionscontinue.Areas

3

wherelocatingopticalcablesisdifficultviatwomarksorotherreferencematerials.

）Thestartingandendinglocationswherethunderprooflinesarelaidorwhereopticaland

4-

14··

coppercablesarelaidinthesameditch.Monitoringmarkstonesshallbesetupforjointsof

buriedcablesinsteadofordinarymarkstones.

）Otherlocationswheremarkstonesneedtobeburied.

5

Whenfixedsignsareusedtomarktheopticalcablepositions，markstonescannotbeburied.

2

Theopticalcablemarkstonesshouldbeburiedontopofthecablespositionsofwhichshallbe

3

inaccordancewiththefollowingrequirements：

）Markstonesforjointsareburiedalongtheopticalcablelinerouting；

1

）Markstonesforturnpointsareburiedattheintersectionofopticalcablelinebends；

2

）Markstonesareburiedinplaceswheremovingisnoteasyorwherepublictransportationand

3

plantingisnotaffected；

）Ifburyingpositionsarenoteasytochoose，auxiliarymarkersinthevicinitymaybeaddedand

4

trianglecalibrationmethodcanbeusedtodeterminepositionsforopticalcables.

Thedirectlyburiedopticalcablesplicesshallbearrangedandplacedatthehigher，relativelyflat

6.2.5

andgeologicallysolidareasasopposedtothesitesforponds，canals，ditches，roadsandbridgesin

additiontoplacesthatarenotconvenientforconstructionandmaintenanceoreasilyaffected.Cement

coverplatesorothersuitableprotectivemeasuresagainstmechanicaldamagesmaybeusedtoprotect

opticalcableclosures.

Whencrossingrailways，lightraillines，roadswithheavytrafficorexcavationrestrictedroads，

6.2.6

opticalcablelinesshallusesteelpipesforprotectionoradoptdirectional专用drillingtolayunderground

pipeswhilstensuringsafetyofotherexistingpipelinesunderground.Steelpipesshallbeextended1m

outofbothsidesofthesubgradedrainageditchandthedepthofopticalcablesburiedfromthedrainage

ditchbottomshallnotbelessthan0.8minadditiontomeetingrequirementsbyrelevantdepartments.

Innerdiameterofpipesshallmeettherequirementsofsubpipesinstallation，butshallnotbelessthan

80mm.Plasticsubpipesshallbeplacedinsidethesteelpipesandthenumberofplasticsubnotfewer

than2inmostcases，isdeterminedbytheactualneed.

Opticalcablelinesshalluseplasticsorsteelpipesforprotectionwhengoingthroughroadsor

6.2.7

villagestreetswhereexcavationisallowed.Bricksorcementcovershallbeusedforprotectionwhen

crossingthetractorsploughroadgroundbreakingpossible.

Opticalcablelinemayuselongplasticpipe，brickorcementcovertobeprotectedwhengoing

6.2.8

throughgroundbreakingpossiblelocationssuchasvillagesetc.

Passingthroughtherelativelysmallditchesandpondswheredredgingandwideningisbeing

6.2.9

plannedorwheredredgingislikely，opticalcablelinesshallbecoveredwithcementplatesormortar

bagsorotheroptionalmeasuresforprotection.

The"S"人人文库shapedlayingshouldbeadoptedwhenopticalcablesaretobedeployedonslopeswith

6.2.10

anglegreaterthan20degreesandlengthgreaterthan30m.Opticalcabletrenchesonslopesthatare

likelyscouredbywatercurrentshalltakeblockagestrengtheningorshuntingmeasures.Whenlaying

opticalcablesonslopeswithanglegreaterthan30degrees，specialstructureshouldbeadopted.

Whengoingthroughoralongareassusceptibletowatererosion，suchasmountainspringsand

6.2.11

streams，opticalcablesshallbeprotectedbybuildingoverflowdam，cementsealingditches，water

retainingwallsorothermeasuresperspecificcircumstances.

Forcablelayinginupanddownterrains，thedepthandcurvatureradiusoftheopticalcables

6.2.12

buriedshallmeetspecificrequirements.Opticalcabletrenchesshouldtakemeasurestopreventsoil

15··

fromerosionandensurethesafetyofthecablesaccordingtolocalconditions.Whentheelevation

reaches0.8morabove，ridgesorprotectionslopesshallbeaddedforprotectthecables.

Effectsfrommechanicaldamages，vibrationsandtemperaturechangesshallbeconsidered

6.2.13

whenlayingopticalcablesonbridges，andcorrespondingprotectionmeasuresshallbetakenaswell.

Theminimumclearancebetweendirectlyburiedcablesandotherbuildingfacilitiesshallbein

6.2.14-

accordancewithspecificationsdescribedinTable6.2.14.

Table6.2.14Theminimumclearancebetweendirectlyburiedcablesand

otherbuildingfacilities（m）

NameParallelCrossing

Communicationpipelines（notincludingmanholesandhandholes）0.750.25

Directlyburiedcommunicationopticalcablesandcoppercablesindifferentditches0.50.25

Buriedpowercables（belowAC35kV）0.50.5

Buriedpowercables（above35kV）2.00.5

Watersupplypipes（diameterlessthan300mm）0.50.5

Watersupplypipes（diameter300mm-500mm）1.00.5

Watersupplypipes（diameterlargerthan500mm）1.50.5

Highpressureoilpipesandgaspipes10.00.5

Thermalanddrainagetubes1.00.5

Gaspipespressurelessthan300kPa专用1.00.5

（）

Gaspipes（pressuremorethan300kPa）2.00.5

Othercommunicationlines0.5—

Drainageditches0.80.5

Buildinglimitlinesorfoundationsofhouses1.0—

Trees（treesincites，bigtreesintowns，fruittreesandtreesalongsidewalks）0.75—

Trees（bigtreesoutsidecities）2.0—

Waterwellsandgraves3.0—

Cesspools，manures，biogaspools，andammoniapoolsetc.3.0—

Aerialpolesandguywires—

Notes：1Theclearancebetweendirectlyburiedoptical（copper）cableswithsteelprotectioncanbereducedto0.15mcrossingwithwater

pipes，gaspipesandoilpipelines.

2Theprotectionagainstlightningandthunderingshallbeconsideredforpoles，guywires，isolatedtreesandtallbuildings.

3Thediameterofbigtreesisgenerally300mmorabove.

4Whengoingthroughvariousundergroundpipelinesdepthofwhichissimilartothatoftheoptical（copper）cables，opticalcables

shouldbe人人文库laidbelowthepipelinesandprotectivemeasuresshallbetaken.

5Iftheclearancedoesnotmeettherequirementslistedintheabovetable，effectiveprotectionmeasuresshallbetakenin

consultationwithrelevantdepartments.

6.3InstallationRequirementsforDuctOpticalCables

Theductoccupiedbyductopticalcablesmaypreferproperlocationsnearbothsidesofthepipe

6.3.1

group.Theductoccupiedbyopticalcablesineachadjacentpipelinesectionshallberelatively

consistent.Whenthelocationoftheductneedstochange，thescopeofchangeshouldnotbetoolarge

andshouldavoidtransferringfromonesideofthetubegrouptotheother.

16··

Plasticsubpipesshallbeusedtoprotectopticalcablesperactualsituationswhenlayingoptical

6.3.2

cablesinpipesofcement，steel，potteryandceramicsorothersimilarmaterials.Whenopticalcablesare

laidinplasticpipes，largediameterplasticpipesshallbeusedtocontainmultipleplasticsubpipesin

ordertoincreasetheutilizationrateoftheducts.

Installationofsubpipesshallbeinaccordancewiththefollowingrequirements：

6.3.3

Subpipesshouldadoptsuitablematerialssuchasplastics.

1

Thequantityofsubpipesneedstobedeterminedaccordingtothediameteroftheductsand

2

engineeringneeds，withthetotalequivalentdiameterofthesubpipesnotgreaterthan90%ofthepipe

diameter.

Thesubpipesinoneductshallbeinstalledatonetime，andthereshallbenojointsinthepipe

3

sectionbetweentwoman（hand）holes.

Thesubpipesshallextendfromman（hand）holesatappropriatelength，usuallymaybe

4

200mm-400mm.

Pipeendsshalladoptwaterproofsealingifsubpipesarenotusedinthecurrentproject.

5

Opticalcableclosureinman（hand）holesshouldbeinstalledabovetheperennialwaterleveland

6.3.4

protectiontraysorotherbearingmethodsshouldbeadopted.

Opticalcablesinman（hand）holesshallbefixedfirmlyandshouldbeprotectedwithplastic

6.3.5

pipes，shallbemarkedwithclearidentificationsignsorcablelabels.

Opticalcableslaidinspecialpipelinessuchasonhighways，railways专用，bridgesandconstruction

6.3.6

projectswithotherlargediameterpipelinesinthesameditch，shallbeproperlyprotected，takingfull

considerationofvariouseffectsoncablelinesincludingroadsurfacesubsidence，impactsandshocks，

vibrations，structuraldeformationcausedbyseveretemperaturechangesetc.

6.4InstallationRequirementsforAerialOpticalCables

Aerialopticalcablelinesshalladoptdifferentconstructionintensitylevelsbasedondifferentload

6.4.1

areas.Divisionofloadzonesshallbedeterminedaccordingtothemeteorologicalconditionsdescribedin

Table6.4.1.

Table6.4.1Meteorologicalconditionsfordivisionoflineloadzones

Loaddifference

MeteorologicalconditionsMediumloadHeavyloadOverweightload

Lightloadzones

zoneszoneszones

Iceequivalentthickness（mm）≤5≤10≤15≤20

Freezingtemperature-5℃-5℃-5℃-5℃

Maximumwindspeed人人文库whenfreezingm/s10101010

（）

Maximumwindspeedwithoutice（m/s）25———

Notes：1Theicedensityis0.9g/cm3.Foriceandfrostmixtures，icethicknessmaybeconvertedas1/2ofitsthickness.

2Themaximumwindspeedshallbethecalculatedbytheaveragevalueofmaximumwindspeedin10minutes，asautomatically

recordedbymeteorologicalstations.

3Themaximumicethicknessandmaximumwindspeedshallbedeterminedaccordingtothemeteorologicaldatainthe

constructionareasandshallbebasedonaveragedatafora10yearperiodasacycle.

-

Forexceptionalregionswheretheiceissevereorthewindspeedexceeds25m/s，thebuilding

6.4.2

standardsshallbeupgradedforthisspecificlinesectionasopposedtothewholeline，accordingtothe

17··

actualweatherconditions.

Aerialopticalcablesmaybeusedforlightandmediumloadzonesandareaswhereterrainsare

6.4.3

relativelyeven.Foroverweightloadzones，areaswherewintertemperatureisbelow-30℃，orregions

wherelargespanterrains，sandstormsandhazardouswindsareprevalent，aerialopticalcablesshouldnot

beconsidered.

Layingofaerialopticalcablesshallgiveprioritytosharingoftheexistingpoles.

6.4.4

Theintensityofaerialopticalcablepolelinesshallbeinaccordancewiththerelevantrequirements

6.4.5

underthecurrentprofessionalstandardYD5148DesignSpecificationsforPoleLineofOptical

（Copper）CableCommunicationEngineering.Thepoleintensityshallbecheckedandverifiedto

ensurearchitecturesafetywhenusingexistingpolestohangopticalcables.

Aerialopticalcablesshouldadoptsuspensionwirehangingmethodandtheselfsupporting

6.4.6-

methodcanalsobeusedaccordingtoengineeringrequirements.Eachsuspensionwireusuallyshould

hanganopticalcableonly.Hangingtwocablesononesuspensionwire，inthecasesofshortdistance

laying，shallensurelinesafetyandnotaffectoperationandmaintenance.Opticalcablesonsuspension

wiresmaybeinstalledwithcablehooksorspiralbinding.

Installationofsuspensionwiresshallmeetthefollowingrequirements：

6.4.7

Theselectionofsuspensionwireshallbeinaccordancewiththefollowingrequirements：

1

）Thesuspensionwiremaybedeterminedthroughcalculationofsuchfactorsastheloadzone

1

differencesoftheinstallationregions，opticalcableloads，standard专用spansbetweenpolesetc.

Asageneralpractice，steelgalvanizedstrandswith7/2.2and7/3.0specificationsusually

shouldbeselected.

）Ingeneral，thecommonlyusedpolespanshallbe50m.Appropriatepolespanofdifferentsteel

2

strandsforvariousloadzonesshallbeselectedinaccordancewithTable6.4.7.Themainand

auxiliarysuspensionwiresdeviceshouldbeadoptedwhenthepolespangoesbeyondthe

specificationsoutlinedintheTablebelow.

Table6.4.7Selectionforsuspensionwirespecifications

SuspensionwirespecificationsLoadzonesPolespan（m）

7/2.2Lightloadzone≤150

7/2.2Mediumloadzone≤100

7/2.2Heavyloadzone≤65

7/2.2Overweightloadzone≤45

7/3.0Mediumloadzone101-150

人人文库7/3.0Heavyloadzone66-100

7/3.0Overweightloadzone45-80

Theinstallationandreinforcementofsuspensionwiresshallbeinaccordancewiththe

2

followingrequirements：

）Suspensionwiresmaybeinstalledwithbolt（woodenpole），suspensionarmshook（cement

1

pole）orthreeholessinglebendslot，andsuspensionwirearmsandpressureplatesmayalso

--

beconsidered.

）Installationpositionsofsuspensionwiresshallconsidertherequirementsofothercableson

2

18··

thepole，andensurethatafterhangingtheca