电气预埋规范

.电气埋管施工工艺细则Electricalconduitconstructiontechnologyrules1．严禁使用电焊、气焊割管。Strictlyprohibitedinusinggasandelectricweldingcuttingconduit.2．严禁将脚手架作为电缆管使用。Strictlyprohibitedinusingthefolderaselectricalconduit.锈蚀严重的钢管不得使用；钢管弯制或安装前应将管口及管内杂物清扫干净，并除去毛刺。Existseriouscorrosionconduitisnotallowedused;themouseoftheconduitastheinnerpartthedebrismustberemovedbeforebendingorinstallation3．电缆管切割采用手工锯或切割机进行切割，并保证切割面平整且不倾斜；切割后必须立即将管口毛刺打磨干净，并打磨管口成喇叭型。Cuttingfortheconduitadoptinginmanualsawormachine,andensurethecuttingsurfacesmoothandnottilt;burringaftercuttingmustbeimmediately,andpolishedtypenozzleintohorn.4．电缆管的弯曲半径R≥10D（电缆管外径）；弯曲角度≥90°，并尽可能减少90°弯头；电缆管弯制不得出现明显的凹瘪、裂纹、折皱，钢管弯扁程度≤0.1D（电缆管外径）。BendingradiusR≥10D(hereDisconduitoutdiameter);BendingAngle≥90°,andaslessaspossiblethe90°elbow;conduitbendingcannotappearobviousconcave,crack,wrinkle,flatsteeltubebendingflatlevel0.1D(hereDisconduitoutdiameter).6．电缆管安装时，每根电缆管弯头数量不得超过3个，90°弯头不得超过2个（埋管长度≥12米，不得多于2个弯头；12米≥埋管长度≥8米，不得多于3个弯头；直管埋设不得大于30米）超过上述须增加转接盒。Wheninstallationconduit,theamountofeachconduitelbowshallnot..exceed3,elbowwith90°shallnotbemorethan2；theconduitlength≥12m,shallnotbemorethantwoelbow;Thelengthoftheconduitthatchangedbetween8mand12m,shallnotbemorethanthreeelbow;straightshallnotbemorethan30meters；Ifexceedthestandardmorethanthestandardmustincreasethetransferbox.7．电缆管连接不得对接焊，必须采用短套管；套管长度≥50mm；whenconduitconnectionashortsocketmustbeused，andnobuttwelding（exceptspotwelding）；thelengthofthesocketmorethan2timesofconduitoutdiameter.电缆管型壁厚电缆管外径连接套管内径连接套管的长度号（mm）（mm）（mm）（mm）TypeThicknessOutdiameter.SocketinnerLengthdiameterDN253.2533.535≥50mmDN323.2542.343≥50mmDN503.56061≥50mmDN8048889≥50mm8．电缆管连接时,先将套管中间凸台毛刺打磨干净，然后将电缆管插入套管中，电缆管与凸台之间不得留有间隙；连接套管与电缆管两侧均匀电焊4点，并用黑胶布缠绕封实；Whencoupling,thereshouldn’tgapbetweenthetwoconduitandthecounterpartmalocclusionislessthan2mm,counterpartseamshouldbeinthemiddleofthesocket,andthebothsidesalongthecircumferentialweldingsealing,partialcannotweldingmustuseblacktapewindingsealingwithfastenedironwire;9．电缆管不得在外壁直接点焊加固，加固采用铁丝绑扎或煨制钢筋成环钩加固、切割20~30mm套管套至固定点进行，固定间距：φ15~φ20为1.0~1.5米，φ25~32为1.5~2.0米，φ40~φ50为2.0~2.5米，φ65以上不大于3米。Potweldingreinforcecan’tbeallowedoutsidethewallofconduitdirectly,aavailablesteelbarwillbemadeintoaringhook,andthen..cutting20~30mmoneendfastentoconduitanotheronestablepointorironwirecolligationfixedspacing:φ15mm~20mmis1.0~1.0m,from25mmto32mmis1.5~1.5meters,40mm~50mmis2.0~2.5meters,exceed65mmnotmorethan3meters10．电缆管与接线盒的连接可采用焊接和丝扣连接，：电缆管伸入接线盒3~6mm管口用黑胶布包扎结实，接线盒内用湿棉纱、破布填实；外部用黑胶布缠绕，以防止水泥沙浆进入。Weldingandthreadedcanbeusedfortheconnectionbetweenelectricalconduitandsockets,electricalconduitareputtedintothesockets3~6mmThemouseoftheconduitwithblackadhesivebandage,internalpartsofthesocketfilledwithawetcottonyarn,cloth;Externalwithblacktapewinding,inordertopreventcementmortarhavingaaccessinto.11．接线盒安装时必须与紧贴，并用钢筋在接线盒四周加固；电缆管直径≤DN25的指明及消防报警预埋管放置于模板与钢筋网之间，预埋管绑扎在钢筋网上，与模板之间预留间隙≥15mm；电缆管在接线盒处的固定点与接线盒间距不得大于200mm。Socketmustbeclingytothetemplateandreinforcedaround,betweentheelectricalconduitandtemplatereservedclearance15mmormore.intothesocketsofthecablemustbeweldingwithacrossbar(from6or8mmroundsteel;所有外露预留的电缆管及伸入分电箱、木制接线盒等管口应伸出砼面200mm以上，电缆管口必须封堵。续接管路用胶布封口后加套帽。Allthereservedoutsideelectricalconduitandthoseintothedistributionbox,andwoodenboxshouldstretchouttheconcreteover200mm,addingironplateweldingseal,steelplatewithcuttingmachine..andsmooth.Thecontinuedjacketedpipesetacoveraftersealingwithtape.13．电缆管过缝制作：采用在电缆管外套比电缆管外径大两级套管，套管与电缆管口部密实封堵，电缆管套管制作规格，长度如下：Manufactureforexpansionjoint,adoptingthetwolevelsofcasingpipecoatthanelectricalconduitdiameter,firstwindinglinenbetweencasingandelectricalconduitthenfillingwithasphaltclose-grained,Specifications,thelengthisasfollows:电缆管型壁厚（mm）电缆管外径过缝套管规过缝套管内过缝套管的号thickness（mm）out格径（mm）长度（mm）TypediameterspecificationInnerlengthdiameterφ253.2533．5φ4041600φ323.2542．3φ5053800φ503.560φ8080.51200φ80488．5φ125131180014．同一处电缆管超过3根，出砼必须排列整齐、美观（横平竖直）；图纸没有明确要求时，按下述原则排列：（1）：电缆管由大到小顺序排列；（2）：3~9根可排列成一排或两排；（3）：10根及以上必须排列成两排或两排以上，且每排宽度大致相当，宽度相差宜小于两根埋管的直径；（4）成排电缆管预留高度（或长度）一致。Therearemorethanthreeconduitatasameplace,theoutingconcretemustbeneat,beautiful(horizontalandvertical);Drawingswithoutclearrequirements,sortedbythefollowingprinciples:(1):frombigtosmallorder;(2):3~9piecescanbearrangedinarowortworows;(3):10andabovemustbearrangedintworowsormoreandeachrowwidthisthesame,thewidthofthedifferenceshouldbelessthanthediameteroftwoembeddedpipes;(4)rowselectricalconduitreservedheight(orlength)arethesame;...