山西某電廠鍋爐大板梁吊裝施工技術(shù)措施中英文

2#鍋爐大板梁吊裝施工技術(shù)措施Constructiontechniquemeasurementof2#boilerplategirderhoisting工程概述General1.1主要工程量及技術(shù)數(shù)據(jù):1.1mainengineeringquantityandtechnicaldata:鍋爐鋼結(jié)構(gòu)大板梁主要有三根，梁兩端全部采用鑲嵌式、高強(qiáng)螺栓連接。分別位于J、K、L軸線上，其中:therearethreepiecesofplategirderinboilersteelstructure,connectedbymosaictexture、highstrengthboltonbothendofplategirder.AndindicatedonaxisJ、K、Lseparately,asfollow:J板梁重121.3t,長29.098m,截面尺寸為1400×5500，標(biāo)高83.595m;K板梁重132.4t,長28.798m,截面尺寸為1400×5500，標(biāo)高84.430m;L板梁重156.8t,長28.798m,截面尺寸為1600×5500，標(biāo)高83.595m。PlategirderJweight:121.3t,length:29.098m,sectionsize:1400*5500,EL:83.595mPlategirderKweight:132.4t,length:28.789m,sectionsize:1400*5500,EL:84.430mPlategirderLweight:156.8t,length:28.789m,sectionsize:1600*5500,EL:83.595m1.2吊裝方案簡介Hoistingschemeintroduction:由于三根大板梁的重量較重，單臺起重機(jī)械不能滿足獨(dú)立吊裝任務(wù)，擬采用兩臺起重機(jī)進(jìn)行抬吊作業(yè)，一臺是布置于鍋爐爐右的FZQ1380吊車，另一臺是布置于爐膛內(nèi)部左側(cè)的CKE4000C吊車（超起96m主臂工況）。Thethreeplategirdercan’tbehoistedsolelybyonehoistingcranebecauseoftheirweight.Soadopthoistingworkingbytwocranes,oneisindicatedontherighthandofboiler,whichisFZQ1380crane;theotherontheleftofinsidefurnace,whichisCKE4000Ccrane,(adopt96boom)2、鋼架緩裝方案steelworkdelayinginstallationscheme:鋼架第五層吊裝完畢后，將鍋爐尾部靠中心右側(cè)鋼架吊裝完善到頂，即M及N排的14軸到15.5軸。預(yù)留左側(cè)12.5軸到14軸作為板梁吊裝時(shí)CKE4000C的行走空間。Afterfinishinginstallationoftier5steelworks,installtherighthandofsteelworknearcenterlineonrearboiler,i.e.axis14to15.5ofrowMtoN.reservedspacefromthelefthandofaxis12.5to14forworkingspacewhenCKE4000Choistplategirder.3、鋼架加固方案steelworkreinforcingscheme:由于鋼架M排36m以上為單片設(shè)計(jì)，缺乏整體穩(wěn)定性，吊裝板梁前必須對爐右部分的51m,68m和81m處的主橫梁上斜拉焊接Ⅰ25工字鋼，如圖示:thereisn’tintegralstabilityasdesigningforonepiecesolelyaboverowM36msteelwork,somitreweldI25I–shapedsteelformainhorizontalbeamonEL51m,68mand81m,whichisontherighthandofboiler.Illustrateasfigure:加固：stiffener爐中心線：:thecentrelineofboiler.另外，F(xiàn)ZQ1380吊車的附著臂應(yīng)盡量固定于K和L主柱上，以增強(qiáng)鋼架在吊裝時(shí)的整體穩(wěn)定性。Inaddition,FZQ1380craneattachedjibshouldbeindicatedonmaincolumnKandL,inordertoreinforceintegralstabilitywhenhoistingsteelwork.4、施工方案：4.Constructionscheme:4.1施工流程（J-K-L）4.1constructiondiagram(J-K-L)鋼架臨時(shí)加固──設(shè)備清點(diǎn)、檢查、編號──J大板梁卸車到位──J板梁地面翻身──J大板梁吊裝就位──高強(qiáng)螺栓的安裝──吊索具摘鉤（然后同法進(jìn)行K、L板梁吊裝）reinforcingsteelworktemporarily──probe、check、numberequipment──Jplategirderunloadingtruckisatdesignatedposition──Jplategirderisturnedoveraboveground──hoisttodesignatedposition──installhighstrengthbolt──couplerdisconnectionforhoistingtool(workingbythesamemethodforK、Lplategirder)4.2大板梁的運(yùn)輸及卸車方案4.2Transportationandunloadingschemeofplategirder大板梁運(yùn)輸Transportationofplategirder.1大板梁運(yùn)輸要求裝車時(shí)大板梁右端在車尾布置發(fā)貨；大板梁由汽車直接由鍋爐擴(kuò)建端LM跨拉運(yùn)到爐膛相應(yīng)的位置。.1Therightendofplategirderfixeduptodeliverinthetailtockwhenaplategirderwastransported;Theplategirderwastransportedtocorrespondingpositionoffurnacepass-byextendplaceLMofboiler..2大板梁的供貨順序?yàn)镴、K、L，運(yùn)到現(xiàn)場一根就吊裝一根，不得在爐膛內(nèi)存放。.2ThedeliveryorderofplategirdersareJ、K、L,arriveanon-the-spotonehoistone,i.e.hoistonebyonecan’tbestoredinthefurnace.吊裝機(jī)械工況選定及布置CKE4000C吊選用96m主臂工況，回轉(zhuǎn)半徑16m時(shí)最大起重量120t;FZQ1380作業(yè)半徑為28m（J板梁）時(shí)最大起重量45t和22m（K、L板梁）時(shí)最大起重量63t，吊車布置詳見附圖2。HoistingmechanicalworkingconditionandarrangementCEK4000Cselect96mmainboomworkingcondition,workingradiusformostheavytogetupweight120tatthe16m;FZQ1380workingradiusis28mformostheavytogetupweight45t(K,Lplategirder)and22m(K,Lplategirder)mostheavytogetupweight63t,arrangementofcraneseeaddiction2.鋼絲繩綁扎綁扎繩布置在板梁吊耳中心線兩側(cè)，CKE4000C吊用Ф65×50m鋼絲繩二繩八股兜板梁，F(xiàn)ZQ1380用Ф52×50m鋼絲繩二繩四股兜板梁。BonderwireLigaturearrangementinplategirderliftingeyecentrelinebothsides,CEK4000Cselect65*50msteelwirerope2and8essay.FZQ1380select￠52*50msteelwirerope2and4essaytohangplategirder.檢查試吊兩車同時(shí)起吊至板梁離開下部支撐約100mm時(shí)，靜吊3分鐘進(jìn)行檢查，檢查地面承載狀況，檢查吊裝機(jī)械及鋼絲繩的運(yùn)行情況，確定無異常后，進(jìn)行抱閘試驗(yàn)，繼續(xù)起吊約200mm，然后落鉤，檢查有無溜鉤現(xiàn)象，確信抱閘運(yùn)行情況良好后，進(jìn)行下一步作業(yè)。Checkingandtrialhoisting.Twotruckhangplategirderleavetoplategirderunderpartsupportatinviting100mmatthesametime,waitfor3minutetotest,checkgroundbeartheweightofstate,checkhoistmechanicalworkingcondition,itisassurethatitsworkingconditionisnormal,thenmakeembracebraketest,goonhoistabout200mm,thenfallhook,checkitwhetheritisslipawayhookphenomenon,itisgoodconditionafterembracebrakeruningoodcondition,carryonthenextwork.正式起吊卸車大板梁吊起距離離拉運(yùn)汽車駕駛室頂部約500mm后，將運(yùn)輸車輛開出，兩車抬吊將大板梁吊至正式起吊的指定地點(diǎn)（見附圖1），同時(shí)事先在擺放位置鋪設(shè)好枕木，然后吊車同時(shí)落鉤將板梁放置在枕木上，如枕木傾斜則用吊車找正。FormallyhoistingandunloadingWhenplategirderhoistoutofdistanceabout500mmfromdriver’scabintop,transportvehicledraw.Twocranehoistplategirdertoappointedplace(seeaddiction1),laygoodsleeperinlocationinadvanceatthesametime,thencranefallhookputtheplategirderonthesleeper,ifthesleeperslopesandlookforwithcrane.4.3大板梁地面翻身4.3turnoverplategirder4.3.1采取捆綁方式，F(xiàn)ZQ1380和CKE4000C的吊點(diǎn)選在吊耳位置，CKE4000C用Ф65×50m鋼絲繩二繩八股兜板梁，F(xiàn)ZQ1380用Ф52×50m鋼絲繩二繩四股兜板梁。takewayoftrussingup,liftingpositionofFZQ1380andCEK4000Cselectliftingeyeposition,CEK4000Cselect65*50msteelwirerope2and8essay.FZQ1380select￠52*50msteelwirerope2and4essaytohangplategirder.4.3.2注意翻身前在大板梁的兩端與翻身相反方向各拉手動(dòng)葫蘆一套，保證在翻身過程中當(dāng)板梁的重心越過下翼板的支點(diǎn)后對其實(shí)施牽拉力，防止板梁突然的傾倒和晃動(dòng)造成瞬間增力，從而對起重機(jī)械造成不必要的影響。Eachshakehandsandmoveonesetofcalabashesintheoppositedirectionwithstandingupofbothendsoftheplategirder,guaranteetoimplantpullingforceofleadingtoitafterthecenteroftheplategirdercrossesthefulcrumwhichmakesthewingboardinthecourseofstandingup.Preventplategirdertopplingoverandcausetoincreasingstrength,leadtothefactunnecessaryinfluencetothehoisttool.4.3.3待吊點(diǎn)拴鉤檢查牢固且鋼絲繩均勻吃力后，開始正式起鉤翻身，當(dāng)板梁開始扳起時(shí)的吊點(diǎn)受力最大，約為實(shí)際重量的一半，在板梁的重心越過下翼板的支點(diǎn)前，兩端的手動(dòng)葫蘆不斷松開，盡量與起升同步;在板梁的重心越過下支點(diǎn)后，吊點(diǎn)受力急劇減少，同時(shí)兩端的手動(dòng)葫蘆受力增大，此時(shí)開始要緩慢調(diào)整葫蘆速度，讓板梁的下翼板一邊緩慢著地，此時(shí)翻身工作結(jié)束。(翻身后的擺放位置見附圖1)4.3.3Aftersomefastensthehookandchecksfirmlyandthesteelwireisevenandstrainingtohang,thearisesformallyatthebeginningtostandup,hangingsomereceivestrengthtobemostheavy,nearlyhalfoftheactualweightwhentheplategirderbeginstopull,beforethecenteroftheplategirdercrossesthefulcrumwhichputsthewingboard,themanualcalabashofbothendsinbeingunclampedconstantly.4.3.4大板梁立起后兩端用[20槽鋼斜拉加固，防止板梁傾倒。Reinforethebothendbyusing[20chanelsteelasdiagonallineinordertopreventslop.4.4Positionfixedforplategirders4.4.1起吊前的準(zhǔn)備工作Preparationworkbeforehoisting4.4.1.1確認(rèn)好板梁的吊裝方向后，測量板梁的實(shí)際長度與該跨的實(shí)際跨距的偏差值（實(shí)際跨距至少大出4~6mm，提前將吊裝銷軸試穿一遍。.1Makesureactuallengthforplategirdersanddeviationofactualspan(theactualspanislarger4~6mmatleast,andtryontheliftingpinshaftinadvance.4.4.1.2在板梁的上翼板上搭設(shè)固定的專用欄桿、軟爬梯和安全防護(hù)繩。.2Lappingthefixedspecialhandrails、softladderandprotectingstringontheupperplateforplategirder.4.4.1.3檢查FZQ1380和CKE4000C的工作半徑是否在規(guī)定的范圍內(nèi)，以及吊車的各項(xiàng)性能技術(shù)指標(biāo)是否符合規(guī)范要求。.3ChecktheworkingradiusforFZQ1380andCKE4000Cwhethertheyareinthespecifiedscope,andcheckeveryperformancetechnicalindexeswhetheritisconfirmedtospecificationrequests.4.4.1.4安裝大板梁使用的高強(qiáng)螺栓提前放置在81m層兩側(cè)預(yù)先搭好的平臺上。.4Installhighstrengthboltsforplategirdersusedbeforeputtheboltsonthetwosidesof81mplatformforadvancelapped.4.4.2大板梁的起吊Hoistingplategirder4.4.2.1利用正式起吊吊耳，CKE4000C吊點(diǎn)直接將吊鉤插入起吊吊耳后穿兩個(gè)銷軸，F(xiàn)ZQ1380的吊點(diǎn)采用Ф52×50m鋼絲繩二繩四股兜掛在吊耳的銷軸上，三個(gè)銷軸穿好后，固定銷軸的限位鋼筋。.1.Itisliftinglugformallytoutilize,CKE4000Changpointinsertcliveringettingupliftinglugdirectly,weartwopivots,thehangingsomeofFZQ1380adoptsfoursharesandtworopesofФ52X50msteelwirerope,wrapitupandhangonthepivotoftheliftinglug,afterthreepivotsareputon,fixupthelimitlocationofreinforcingbaroftheregularpivot.4.4.2.2全部檢查結(jié)束后由總指揮發(fā)布正式起吊命令，開始起吊，同時(shí)指揮兩臺吊車緩慢起鉤，當(dāng)板梁被抬吊離地面100mm后停止起吊，全面檢查吊車及起吊索具的受力情況，確認(rèn)正常無誤后，開始繼續(xù)起吊。.2Releasedbythecommander-in-chiefandgetuptohangtheorder,begintogetupandhangafterfinishingallinspections,twocranearecommandedtoliftinghookslowlyatthesametime,itishangedtogetuptostopaftertheplategirderisliftedandhungoverhead100m,checkthecraneandgetuptohangreceivingthebearingsituationofliftingriginanall-roundway,afterconfirmingnormallyandwithoutfail,begintocontinuegettingupandhanging.4.4.2.3大板梁起吊過程中監(jiān)護(hù)人員要隨著板梁的起升高度向上走，保持板梁的水平和吊車的同步，同時(shí)密切監(jiān)護(hù)板梁在經(jīng)過橫梁時(shí)端頭的有效距離。.3Plategirderishanging,supervisormoveupwardstogetup,keeplevelandsynchronismofcrane,assurethevaliddistancewhileplategirderispassingthecrossbeamcloselyatthesametime.4.4.2.4大板梁在被抬吊至安裝高度后，同時(shí)指揮FZQ1380向正式安裝位置轉(zhuǎn)臂、CKE4000C向正式安裝位置走車，使板梁正式安裝到位。.4Plategirderishoistedtodesignatedheight,thenFZQ1380turnboomtoformalerectionpositionatthesametime