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1、电缆沟开挖施工方案WorkMethodofCableTrenchExcavationCompiledby:Reviewedby:10月21日October21,2009目次Content一.概况OVERVIEW31.1工程概况PROJECTOVERVIEW31.2施工范围SCOPEOFWORK3二编制按照COMPILATIONBASIS4三施工工艺流程CONSTRUCTIONPROCESS:4四.前期预备PREPARATIONS44.1技能预备TECHNICALPREPARATION44.2材料预备MATERIALPREPARATION54.3要紧机具预备MAINEQUIPMENTSPREPA
2、RATION54.4作业情况预备OPERATINGENVIRONMENTPREPARATIONS5五.电缆沟施工CABLETRENCHCONSTRUCTION55.1电缆沟丈量、定位CABLETRENCHMEASUREMENTANDPOSITIONING55.2电缆沟开挖CABLETRENCHEXCAVATION6六.质量把持QUALITYCONTROL76.1电缆沟外形尺寸赞成倾向表ALLOWABLEDEVIATEDEXTERNALDIMENSIONSOFCABLETRENCHTABLE76.2应留心的质量征询题QUALITYISSUES8七.成品保护FINISHEDPROTECTION8八
3、.施工记录CONSTRUCTIONOFRECORD8九.平安花费、文明施工恳求跟方法SAFETYANDCIVILIZEDCONSTRUCTIONREQUESTSANDMEASURES9附厂区电缆沟图：ATTACHED:CABLETRENCHDRAWING9一.概况Overview1.1工程概况ProjectOverview工程名称：本工程涉及三个变电站，分不是现有的220/35kVA472变电站、现有的35/10kVB301S变电站以及新建的35/10kVC581变电站，义务内容为三个变电站之间随从三个变电站接至MV用户的电力电缆、把持电缆、接地电缆敷设所需电缆沟的开挖工程。Theprojec
4、tinvolvesthreesubstations,namelytheexisting220/35kVA472substation,theexisting35/10kVB301Sthe35/10kVC581substationandanewsubstation.Thisisthepower,controlandgroundingcabletrenchexcavationprojectamongthreesubstationsandforMVusersconnectedtothethreesubstations.1.2施工范围ScopeofWork1)由A472变电站引出3路35kV出线。其中：
5、一同引至B301S建筑35/10kV变电站原1#主变，原1#主变电缆将抽出，与新增4#主变连接；另两路引至35/10kVC581变电站1#主变跟2#主变。回路采纳FS-YJY-26/35kV-1*300mm2单芯电缆，直埋敷设。去C581的两路35kV线路，敷设时沿差异道路，以防止两回线路同时受损。Pullthree35VoutgoingsfromA472substation.Ofwhich:ThefirstoutgoingisledtoB301SBuilding(35/10kVsubstation)theoriginalone#maintransformer,pulltheoriginalo
6、ne#maintransformercableout,andconnecttotheadding4#maintransformer;theothertwooutgoingsareledto35/10kVC581#1andsubstation2#maintransformer.UseFS-YJY-26/35kV-1*300mm2single-corecablesforLoopandburiedpulling.Two35kVlinestoC581arelaidalongdifferentpathstoavoiddamageofthetwoloops.2)由B301S变电站引出7路10kV出线。全部
7、引至B399中心制冷站。回路采纳10kV截面为95mm2的三芯铠装电缆，由B301S南面现有的电缆井引出直埋至装置。Pull710kVoutgoingsfromB301SsubstationtoB399centralrefrigerationstation.Loopuses10kVthree-corearmoredcablewithcross-section95mm2andpulloutfromtheexistingcablewellinthesouthofB301Sthenburiedlaytothedevice.3)由C581引出10路10kV线路，分不为A507的四台变压器，B551的两
8、台变压器，B553TDA装置氢气压缩机2台，C521盐酸装置氯气压缩机1台，盐酸压缩机1台供给电源。其中，变压器回路采纳10kV截面为185mm2的三芯铠装电缆，马达回路采纳10kV截面为95mm2的三芯铠装电缆。以上电缆线路均沿方案道路埋地敷设。1010kVlinesledfromC581areusedtosupplypowertoA507sfourtransformers,B551twotransformers,B553TDA2setsofhydrogencompressorunit,C521hydrochloricacidchlorinegascompressorunit,andhydr
9、ochloricacidcompressorunitrespectively.Amongthem,transformercircuitusesx3-corearmoredcablewith10kVcross-section185mm2,motorcircuitusesthree-corearmoredcablewith10kVcross-section95mm2.Allcablelineswillbelaidundergroundalongtheplanningpath.4)接地电缆回路：Groundcableloop:从A472敷设一根95mm2裸铜线去C581，同时从C581敷设四根95m
10、m2裸铜线，分不引至B551、A507、B553跟C521，作等电位结合。以上电缆线路均沿方案道路埋地敷设。Laya95mm2barecopperwiretoC581fromA472.MeanwhilelayfourbarecopperwirestoB551,A507,B553andC521forequipotentialbonding.Allcablelineswillbelaidundergroundalongtheplanningpath.5本工程电缆沟走向如下：Thecabletrenchdirectionsareasfollows:电缆沟南线为A472至C581，全长约850米，按照
11、K-K断面图：开挖深度为1米，沟槽底宽0.6米，沟槽面宽约1.1米。CabletrenchsouthlineisfromA472toC581about850meterslong.AccordingtoKKsectionaldrawing,excavationdepthisof1meterwithtrenchbottomwidth0.6mandfacewidth1.1m.电缆沟北线为A472至C581跟B301，其中共线约220米，按照A-A断面图有：开挖深度为1米，沟槽底宽1米，沟槽面宽约1.5米；CabletrenchnorthlineisfromA472toC581andB301andth
12、ecollinearisabout220meters.AccordingtoAAsectionaldrawing,excavationdepthis1metertrenchwithtrenchbottomwidth1mandfacewidth1.5m.至C581支线约430米，按照E-E断面图有：开挖深度为1米，沟槽底宽0.6米，沟槽面宽约1.1米；至B301支线约300米，按照B-B断面图有：开挖深度为1米，沟槽底宽0.6米，沟槽面宽约1.1米。Thesub-linetheC581isabout430meters.AccordingtoEEsectionaldrawingexcavation
13、depthis1metertrenchwithtrenchbottomwidth1mandfacewidth1.1m.Thesub-linetoB301theisabout300meters.AccordingtoBBsectionaldrawing,excavationdepthis1metertrenchwithtrenchbottomwidth1mandfacewidth1.1m.二编制按照CompilationBasis1按照电气包中压部分招标文件及招标图纸编制而成。AccordingtoElectricpackage(MV)thetenderandtenderdrawings.2在充
14、分研究工程的客不雅观情况跟施工特征，结合我公司类似工程施工阅历的根底上编制的。Basedonfullstudyonconstructioncharacteristicsandobjectivesituationandcombinedwithsimilarconstructionexperience.3在本方案编制过程中，严格实行国家现行建筑跟装置工程施工及验收标准、规程、标准、方案标准。详细如下：Inthiscompilationprocess,strictlyimplementcurrentnationalconstructionandinstallationconstruction,acc
15、eptancenorms,procedures,standards,anddesignspecifications.Asfollows:电气装置装置工程电缆线路施工及验收标准GB50168-2006ElectricalinstallationcableconstructionandacceptancestandardsGB50168-2006电气装置装置工程接地装置施工及验收标准GB50169-2006ElectricalinstallationearthingconstructionandacceptancestandardGB50169-2006建筑电气工程施工质量验收标准GB503032
16、002BuildingElectricalConstructionQualityAcceptanceGB50303-2002三施工工艺流程：ConstructionProcess:前期预备电缆沟丈量、定位断定开挖次第沿灰线切出槽边外表线分层开挖修整槽边清底preparationcabletrenchmeasurementsexcavationordercuttingcontourlinealongthecalcareousnessstratifiedexcavationfinishingcabletrenchedgeclearup四.前期预备Preparations4.1技能预备technic
17、alpreparation1针对本工程特征编审详细的电缆沟施义务业指导书，及时构造图纸会审。Compileparticularcabletrenchconstructionengineeringguidebookasperprojectcharacteristicsandorganizepromptlydrawingsjointexamination.2)按照上海市电力建破工程施工工艺施行细那么结合本工程理论编写电缆沟施工工艺卡，并构造施行。CompileconstructiontechniquecardsaccordingtotheShanghaiMunicipalElectricPower
18、ConstructionEngineeringConstructionTechnologyImplementationDetailsandorganizeitsimplementation.3)施工人员单方面理解电缆敷设来路、终点及敷设道路。Constructionworkershavecomprehensiveunderstandingantecedents,destination,andlayingpathoflayingcables.4.2材料预备Materialpreparation按照材料方案倾销所有的材料。所有材料规格型号及电压等级应符合方案恳求，并有产品合格证。Purchasem
19、aterialsaspertheplan.Allmaterialsspecificationmodelsandthevoltagelevelshouldmeetthedesignrequirementsandhaveproductcertificates.4.3要紧机具预备Mainequipmentspreparation尖、平头铁锹、手锤、手推车、梯子、铁镐、撬棍、钢尺、坡度尺、小线或20铅丝等。Sharp,flatheadshovel,handhammers,wheelbarrows,ladders,picks,crowbars,steelruler,slope-foot,smalllea
20、dwireor20#leadwireandsoon.4.4作业情况预备operatingenvironmentpreparations1土方开挖前，应按照施工方案的恳求，将施工地域内的地上、地下阻碍物去除跟处理终了。Priortoearthexcavation,clearupobstructionsonthegroundorundergroundasperconstructionplan.2建筑物或建筑物的位置或场地的定位把持线桩、标准水平桩及基槽的灰线尺寸，必须通过检验合格，并办完预检手续。Thelocationbuildingorstructureandthecalcareousnesso
21、fsitepositioningcontrollines(piles),standardlevelpileandthegroovebasesizemustbetestedqualified,andfinishedpre-screeningprocedures.3场地要清理平坦，做好排水坡度，在施工地域内，要挖临时性排水沟。Cleanupthesiteandmakedrainageslope.Excavatetemporarydrainsintheconstructionarea.4夜间施工时，应公正安排工序，防止错挖或超挖。施工场地应按照需要装置照明装备，在危险地段应设置清晰标志。Arrang
22、enightconstructionproceduresproperlytopreventwrongdigorsuper-dug.Installthelightingfacilitiesasneededandsetsignsinadangerouslocation.5开挖低于地下水位的基坑槽时，应按照工程地质材料，采纳方法落低地下水位，一般要落至低于开挖底面的05m，然后再开挖。Excavatebasepit(groove)belowthegroundwaterlevelshouldlowgroundwaterlevelbasedonengineeringgeologicaldatatobel
23、owerthan0.5moftheunderside,andthenexcavate.五.电缆沟施工CableTrenchConstruction5.1电缆沟丈量、定位cabletrenchmeasurementandpositioning1按照出线电缆方案跟电缆沟开挖现场地形条件断定出电缆沟详细走向。Determinethespecificdirectionofcabletrenchofoutgoingaccordingtolayoutandexcavationterrainconditions.2)电缆沟线路丈量包括定线丈量、水准丈量跟开门见山丈量。Thecabletrenchlineme
24、asurementsincludealignment,levelinganddirectmeasurement.定线丈量要测定线路的中心线跟转角，并应丈量沟槽与相邻的永久性建筑物的位置关系，需要时应在空中上设破标志。Alignmentmeasurementneedstodeterminethecenterlineandcorners,andmeasuregroovesandadjacentpermanentbuildinglocationrelations.Ifnecessary,setupgroundsigns.在停顿沟槽水准丈量时,应沿线设临时水准点,临时水准点标高值由把持水准点引测。Co
25、nductlevelingshouldsettemporarystandardpoints,whoseelevationiscitedbythecontrolmeasure.5.2电缆沟开挖CableTrenchExcavation1)开挖道路断定后，需要由治理公司跟业主确认，尽管防止开挖道路下有管线。如确有管线，那么尽管选择管线较少地域开挖。Themanagementcompanyandtheownerneedtoconfirmexcavationline.Trytoavoidpipelineroutediggingandchooselesspipelineareaonexcavating.
26、2)开挖前要细心调查理解地上地下阻碍物，以便开挖时采纳妥善加固保护方法。按照建破方供给的现况地下管线图，停顿示场调查探摸，在每个开挖道路上，每隔30m停顿人工开挖试空井，清晰全部断面有无不的管线，及其管线分布情况，采纳有效方法加以保护。Investigateobstructionsaboveandbelowgroundbeforeexcavationtotakeappropriatereinforcementmeasures.Accordingtotheundergroundpipelinedrawingsprovidedbytheowner,makesiteinvestigations.At
27、intervalsof30moneachrouteexcavatewellsmanuallytocheckwhethertheentirecross-sectionhasotherpipelinesanditsdistributiontotakeeffectiveprotectionmeasures.3按照根底跟土质、现场出土等条件要公正断定开挖次第。Determineexcavationorderrationallyaccordingtothefoundation,on-sitesoilqualityandotherconditionsetc.4开挖时，应先沿灰线直边切出槽边的外表线，然后再
28、分段分层均匀下挖。Cutoutthecontourlinealongthecalcareousness,andthenexcavatewithsub-layerandsubsection.一般粘性土可自上而下分层开挖，每层深度以60cm为宜，从开挖端部逆向开展按踏步型开掘。Generallyclaycanbeexcavatedfromtoptobottombylayerwiththeappropriatedepth60cm.backwardexcavatefromtheendbysteppingtype.碎石类土先用镐翻松，正向开掘，每层深度，视翻土厚度而定，每层应清底跟出土，然后逐步开掘。G
29、raveltypesoilfirstusepicktoloose,thenforwardexcavatewitheachlayerdepthdependedonthethicknessofdiggingsoil.Clearthebottomanddigouttheearthbylayerandthenexcavategradually.5)在开挖槽边弃土时，应保证边坡跟直破帮的动摇。当土质优良时，抛于槽边的土方或材料，应距槽沟边缘08m以外，高度不宜逾越1m。开挖基坑槽的土方，在场地有条件堆放时，留足回填需用的好土，多余的土方运出，防止二次搬运。Excavatesideearthshoulde
30、nsurethestabilityoftheslopeandupright.Whenthesoilisfine,throwearthonthegrooveside(ormaterial)0.8mawayfromthepit(groove)edgewithheightmorethan1m.Stackbackfillsoilifithasconditionsandmovetheexcessearthouttoavoidsecondaryhandling.6土方开挖部分采纳人工开挖为主，部分地域在保证人员，装备平安，不破坏现有管线的根底上采纳呆板开挖，槽底预留20cm由人工清底。开挖过程中严禁超挖，
31、以防扰动地基。关于有地下阻碍物管、缆的地段由人工开挖，严禁破坏。详细如下：Mainlytakemanualexcavationandensurepersonnelandequipmentsafetyonsomeparts.Takemechanicalexcavationonthebasisofnotdamagingtheexistingpipelineandsetaside20cmatthebottomforclearingbyhand.Ultra-excavationisstrictlyprohibitedtopreventgrounddisturbance.Forundergroundob
32、stacles(pipes,cables)partsexcavatemanually.Asfollows:呆板与人工相结合开挖道路A472至C581南线与北线Mechanicalandmanualexcavationline(A472toC581SouthLineandNorthLine)呆板开挖全部过程都有人员跟随停顿指示，在确认的呆板开挖道路长停顿开挖义务，呆板开挖深度不得特不深，初次开挖把持在300mm左右，再100mm每次挖下去，防止破坏地下管线，假设有管线，破刻停顿人工开挖。Mechanicalexcavationshouldbeundercommandandfollowthecon
33、firmedline.Donotmechanicallyexcavatetoodeepbutfirstby300mmandthen100mmeachtoavoiddestructingpipelines.Iftherearepipelines,immediatelytakemanualexcavation.C581南线开挖到临时道路，通过不的承包商客栈的时候先不开挖断，等电缆沟开挖到最后的时候再回想开挖这部分，开挖后并在这些地段铺上木方。WhenC581SouthLinetemporaryroadthroughthewarehou搜索引擎优化fothercontractor,digdownan
34、dcoverwithwoodenpolesuntilallcabletrenchisexcavatedtothefinalparts.人工开挖道路A472至B301S支线Manualexcavationline(A472toB301SBranch)在人工开挖道路上，安排人员停顿开挖，不得呆板开挖。开挖过程中需要警惕稳重，留心肠下管线。Arrangepersonnelonmanualexcavationlineratherthantakingmechanicalexcavation.Payattentiontoundergroundpipelines.7土方开挖一般不宜在雨季停顿，否那么义务面不
35、宜过大年夜，应分段逐片的分期完成。Theearthexcavationingeneralshouldnotbecarriedoutduringtherainyseason,orworkingfaceshouldnotbetoogreatandshouldbecompletedinsection.雨期开挖基坑槽时，应留心边坡动摇，需要时可适当放缓边坡或设置支撑。同时应在坑槽外侧围以土堤或开挖水沟，防止空中水流入。施工时应加强对边坡、支撑、土堤等的检查。Onpluvialdaysexcavatepit(groove),payattentiontoslopestability.Ifnecessary
36、,lowslopeorsetupsupport.Meanwhileencloseembankmentaroundthepit(groove)ordidaditchtopreventsurfacewaterinflow.Strengthenoncheckingtheslope,support,embankmentetc.8土方开挖不宜在冬期施工。如必须在冬期施工时，其施工方法应按冬施方案停顿。Earthexcavationshouldnotbedoneinthewinterperiod.Ifnecessary,takewinterprogram.采纳防止冻结法开挖土方时，可在冻结前用保温材料掩饰
37、或将表层土翻耕耙松，其翻耕深度应按照本地气候条件断定，一般不小于03m。Onprevent-freezingearthworkexcavationmethod,coverinsulationmaterialbeforefreezingorloosentopsoilwithtillagedepthdeterminedbylocalclimaticconditions,generallynotlessthan0.3m.开挖电缆沟时，必须防止沟底基土遭受冻结，如沟槽开挖终了至埋设电缆之间，有较长的停歇时刻，应在基底标高以上预留适当厚度的松土，或用其他保温材料掩饰Preventthegroovebas
38、esoilbefrozen,suchastheintervalbetweentrenchexcavationandcablelayingreserveloosesoilwithappropriatethicknessabovebasementelevationorcoverwithotherthermalinsulationmaterial.9开槽后及时约请各有关人员验槽，验槽合格后方可停顿下道工序。Inviterelatedpersonneltochecktheexcavatedtrenchandcarryoutthenextworkingprocedureafterpassingtheex
39、amination.六.质量把持QualityControl6.1电缆沟外形尺寸赞成倾向表Allowabledeviatedexternaldimensionsofcabletrenchtable赞成倾向工程allowabledeviationitem电缆沟外形尺寸赞成倾向allowabledeviatedexternaldimensionsofcabletrenchtable序号s/no工程items赞成倾向mmallowabledeviation检验方法testmethod1标高elevation0mm，50mm用水准仪检查waterlevelcheck2长度、宽度length,width
40、0mm由方案中心向单方量、拉线跟尺量检查designcentermeasureandpulllineonbothsidesandrulerinspection3边坡偏陡steepsideslope不赞成notallowed坡度尺检查gradientrulerinspection6.2应留心的质量征询题Qualityissues1沟底超挖：开挖电缆沟不得逾越沟bottomelevation.Ifultra-diginsomeplaces,obtaintheconsentofdesignunits.4施工次第不合理：土方开挖宜先从低处开挖，分层分段依次停顿，构成确信坡度，以利排水。Theconst
41、ructionsequenceisunreasonable:earthexcavationshouldbeginfromthelowerplace,layerbylayerandsectionbysectioninturn;formacertainslopetofacilitatedrainage.5开挖尺寸缺少：电缆沟底部的开挖宽度，应按照施工需要增加义务面宽度。Theexcavationsizeisnotenough:Cabletrenchbottomwidthshouldbeincreasedasperconstructionneeds.6电缆沟边坡不直不平、基底不平：应加强检查，随挖随
42、修，并要细心验收。Slopeisnotstraightandbaseisuneven:strengtheninspection,repaircabletrench,andthenacceptseriously.七.成品保护FinishedProtection1)对定位标准桩、轴线引桩、标准水准点等，挖运土时不得碰撞。并应经常丈量跟校核其破体位置、水平标高跟边坡坡度是否符合方案恳求。定位标准桩跟标准水准点应活期复测跟检查是否准确。Donotcollidetargetingcriteriapiles,axiscitedpile,andstandardlevelpoints,etc.onmoving
43、earth.Regularlymeasureandcheckwhethertheplanelocation,elevationandslopegradientareincompliancewithdesignrequirements.Re-measureandinspecttargetingcriteriapilesandstandardlevelpoints.2)Notesubsidenceanddeformationofneighboringexistingbuildingsorstructures,roads,pipelinesetc.Takeprotectivemeasureswith
44、designandconstructionunitandconstructobservationonsettlementordisplacement.3)在敷设有地上或地下管线、电缆的地段停顿土方施工时，应事先获得有关治理部分的书面赞成，施工中应采纳方法，以防止破坏管线，构成严格事故Conductearthworkontheareaneedstolaygroundorundergroundpipelines,cablespriortogettingwrittenconsentoftherelevantadministrativedepartments.Onconstructiontakemea
45、surestopreventdamagingpipelinesandcauseseriousaccidents.八.施工记录ConstructionofRecord1)自互检记录。Selfandmutualinspectionrecords2电缆工程分项质量检验评定记录。Cableengineeringsub-itemqualityinspectionandevaluationrecords3分项工程验收记录。Sub-projectacceptancerecords九.平安花费、文明施工恳求跟方法SafetyandCivilizedConstructionRequestsandMeasures
46、1开工前应做好施工场地内的道路，开拓适当的义务面，做好检查跟需要的加宽、加固义务，以利平安施工。Buildsiteroadsandappropriateworkarea.Widenandstrengthenordertofacilitatesafeconstruction.2电缆沟开挖工程应留心边坡跟基坑的动摇性，一般应按先深后浅的次第施工，并应采纳需要的保护方法。Notethestabilityoftheslopeandbase,generallyconstructfromdeeptoshallowandtakenecessaryprotectivemeasures.3电缆沟开挖后应及时敷设
47、电缆，不得临时暴露。电缆敷设终了，应抓紧回填义务。回填时，必须事先去除沟不符合回填恳求的杂物，在相对的两侧同时均匀停顿，同时候层夯实。Laycablesthenbackfillafterexcavationwithoutlong-termexposure.Cleardebrisinadvanceandbackfilluniformlyonbothsidesandcompact4夜间施工时，应公正安排施工工程，防止挖方超挖超深。施工现场应按照需要设置充分的照明装备，在危险地段应设置红灯警示。Rationallyarrangenightconstructionprojectsandpreventt
48、heultraexcavation.Theconstructionsetupadequatelightingfacilitiesandredlightwarningondangerouslines.5土方开挖前，应会同有关单位对附近以有的建筑物、建筑物、道路等管线停顿检查跟断定，并在全部施工时代，加强监测，觉察征询题应与方案或建破单位协商采纳防护方法，并及时处理。Inspectandappraisenearbybuildings,structures,roads,pipelineswithrelevantunits.Strengthenmonitoringandconsultwiththedesignortheconstructionunittotakeprotectivemeasuresandtimelyprocessissuesfound.6电缆沟四周设置的防护栏杆应符合平安规那么。Aroundcabletrenchsetprotectiverailingsaspersafetyrequirements