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1、江西泰和坝顶交通桥37～40号桥基灌注桩施工方案葛洲坝集团赣江石虎塘航电枢纽工程W4标项目部二0一0年十二月三十日betheorderofinstallation.(3)thepipelineinstallation,thehoseshouldbechecked,mirrorandlenspadoutofthemetalsealoflight,withoutanyscratches,pits,rust.Lowpressurepipeflangesealingandgasketshallnotaffectsealperformanced
2、efectssuchasscratches,spots.(4)high-strengthboltsshouldbecleaned,Visualinspectionnodefects,andcoatedwithmolybdenumdisulfidetoprotect.(5)highpressureflangeandpipeendsthreadedconnections,pipe-threadchamfershouldbeexposed,padofthelens.(6)shouldbeaccuratelyintotheflangeseal
3、ingsurfaces,apairofflangeconnectionsshouldbekeptparalleltoeachother,thedeviationshallnotbegreaterthantheflangeouterdiameterof1.5%andlessthan2mm,notusestrongerboltsdeskewingmethod.(7)theflangeconnectionshouldbemaintainedandpipesconcentric,andshouldensurethattheboltsfreet
4、oputthemin.(8)thehighvoltageendthreadsofthepipeshouldbecleaned,thesurfaceshallnotbedefective.(9)flangeconnectionsboltsshouldusethesamespecifications,installationshouldbeconsistent,whenfasteningboltssymmetricallyeven.Elasticmoderate,afterfasteningboltsandnutsshouldbeflus
5、h.High-temperaturepipinghottighttheboltsshouldalso,tighthotworkingtemperatureshouldbemaintainedafter2hours.(10)pipelineinstallationallowsdeviationmeetfollowingprovides:projectallowsdeviationcoordinatesoverheadandthetrenchindoor15OutdoorIndoor25elevationoverheadandthetre
6、nchoutdoor±152L‰maximum50±20levelpipelinestraightdegreesDN≤1003L‰maximum80DN﹥1003L‰maximum80Statetubeleadverticaldegrees5L‰maximum30intorowpipelinespacing1520(11)pipelineconnectionShi,shallnotstrongcounterpart,addedpartialpadoraddedmultilayerpadofMethodtoeliminatetheint
7、erfaceportspace,skewed,notoneaftertheHi-Loandotherdefects.目录1概述2编制依据3主要技术要求4施工布置5施工设备及人员6施工材料7施工方法和技术措施8质量检查9施工工期10质量保证措施11安全文明施工betheorderofinstallation.(3)thepipelineinstallation,thehoseshouldbechecked,mirrorandlenspadoutofthemetalsealoflight,withoutanyscratches,pits,
8、rust.Lowpressurepipeflangesealingandgasketshallnotaffectsealperformancedefectssuchasscratches,spots.(4)high-st
