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1、新建铁路滦县至唐港线扩能改造工程反循环钻灌注桩施工作业指导书编制：复核：审核：中铁二十一局迁曹铁路项目部2009年7月lowrotor,untilrotorofweightbysteamendslidingblockandReedendrotorBaysupport,inputlowrotorofwhileshouldinReedendrotorBayataddedpadsleeper,duetostatorhaspreliminaryadjustmentfinished,sostatorwithinboreexistsmustYang
2、degrees,soshouldnoteadjustmentmakesrotorkeepandstatorwithinboreconcentric,makesrotornotandcoilcontact.Panasoniclanehook,removewireropehoist,wrappedattherotorexcitation-sideshoulderarcwasher,andmovetheliftingwireropetoprotectmat.Two5Tchainhoistendbeamconnectionsandweldedt
3、otherotorcarriers,lengthadjustedforfieldconditions,andattheotherendofthestatorliftinghookorendcapendlugsconnected,asshowninFigure11.4.3-1.WithLaneslightlysingleheadupgraderotorReedend,keeprotorlevel,demolitionrotorBayorsupportsleepers,thenslowlysynchronizationpulltwoonly
4、chaingourd,makesrotorinsteamendslidingblockofsupportXiaalongarcskateboardtosteamendsliding,thisprocessinthe,lanemustandrotorofslidingkeepsynchronization,inrotorofsteamendandReedendareduehandguardianshiprotorandstatorZhijianofclearance.Dangbysteamendsidehasnursingringprot
5、ectionofcoilendDepartmentintostatorwithinboreHou,slightlyupgraderotorReedend,inrotorontologyfollowingloadedintoCentralslidingblock,itsloadedintoHoumustverycarefullytoalongaxistoforfindare,andnoteobservationrotorcouplinginwearloadedprocessinthewhetherturned,ashasshouldsto
6、pwearloaded,neededonCentralslidingblocklocationagainforfindare,whileshouldnoteinCentralslidingblockplacedyihouonlyallowssteamendslidingblockbeyondstatorwithinbore,andinCentralslidingblockandsteamendrotornursingringZhijianatleastshouldkeepmustofdistance(300MW76mm,1000MWis
7、50mm).Whenthesteamsidesliderclosetosteamattheendofthestatorbore17反循环钻灌注桩作业指导书1、目的明确反循环钻钻孔桩施工作业的工艺流程、操作要点和相应的工艺标准，指导、规范桩基作业施工。2、编制依据《铁路桥涵工程施工质量验收标准》《铁路桥涵施工规范》《施工图设计文件》3、适用范围反循环钻机适用于粘性土、砂性土、卵石土和风化岩层，但卵石粒径少于钻杆内径的2/3，且含量不大于20%。4、施工方法及工艺要求反循环钻机钻孔施工工艺流程图见下页4.1、施工准备4.1.1、钻孔场地应清
8、除杂物、换除软土、平整压实，场地位于陡坡、水中或淤泥中时，用枕木或型钢等搭设工作平台，平台必须坚固稳定，能承受施工作业时所有静、活荷载，同时还应考虑施工设备能安全进、出场。4.1.2、埋设钢护筒，护筒内径比
