FABRICATIONOFOPENWEBSTEELGIRDERS空腹钢梁制造

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1、PROJECTREPORTonCourseNo.10109By-T.VIJAYAKUMARAXEN/FBW/AJJ,S.RLYS.ARUMUGAMARULAPPANAXEN/CN/TBM,S.RLYH.S.SAXENA,AXEN(CON)/CCG,W.RLYINSPECTION&TRIALASSEMBLYOFOPENWEBGIRDERSAcknowledgementWearegratefulto–SriV.B.SOOD,ProfessorBridgesWhohasguidedusrightthroughthestudyofthisp

2、roject.Wearealsothankfulto-SriN.K.KHARE,CourseDirector.Forhavinghelpedusintrainingprogramme.3INTRODUCTIONOpenwebgirdersareusedfortrackbridgesovervalleysandlargerivers.Standardlengthofopenwebgirdersinrailwaysare30.5,45.7,61.0and76.2metres.Engineeringworkshops,Arakkonamis

3、fabricatingweldedtypegirdersince1981.Presentproductioncapacityis80MTpermonth.Withthepastexperienceinweldedgirderfabrication,thisworkshoptakenuptheworkoffabricationopenwebgirder30.5mspanforSCRailwaysinPurna-Akolasection.SubsequentlyEWS/AJJhasmanufactured4spansofopenwebgi

4、rder45.7mspanforNethravathiBridge.Presently,fabricationof61.0mrivetedtypegirderof10spansforNorthEasternRailwayisunderprogress.4SALIENTFEATURESOFOPENWEBGIRDERRDSODrgNo.BA–11461toBA–11479(M.B.G.Standard)Weightofgirder–65MTOveralllengthofgirder–32.460mEffectivelengthofgir

5、der–31.926m(CentertocenterofBearings)Heightofgirder–7.637mWidthofgirder–5.760mTypeofloading–MBGLoading5FlowProcessChartforFabricatingOpenWebGirder6INSPECTIONOFWELDEDTYPEGIRDERSINSPECTIONBEFOREWELDINGINSPECTIONDURINGWELDINGINSPECTIONAFTERWELDING7INSPECTIONBEFOREWELDINGIn

6、spectionofrawsteelanditsconformationtoIS:2062Gr.‘B’killedandnormalisedvarietyforplatesover12mmthick.Forplatesof10mmand12mmthick,theconditionofnormalisationisnotnecessary.IntheabsenceofSAILorMillcertificate,samplesofplateswithcodeno.arebeingtestedatACMT/LAB/EWS/AJJ.Prepa

7、rationofweldingproceduresspecificationsheetsforvariousweldsinvolvedinthefabricationofaparticularspan.WeldingprocedurequalificationrecordsandapprovalofweldersaretobetakenupaftertheapprovalofWPSSisreceived.(Ref.IS-7307partIandIS–7310partI).Whetherweldingconsumablesareofth

8、ebrandsasperthelatestinstructionsreceivedfromRDSO,assupplementedtoIRS-M.28andIRS-M.39.Transferringofcastnumber