室外给水管道维修施工方案

室外给水管道维修施工方案

HDPE排水管电熔连接施工方案编制时间：一、工程概述：本施工技术方案是根据甲方施工要求与注意事项，并结合国家现行的专业和行业标准，在现场情况初步调研的基础上进行编制的。施工单位为陕西晨瑞建设工程有限公司。二、施工准备工作在施工前，需要对施工所需的开挖机械、工具及劳动力进行合理的安排及技术交底；对施工专业技术人员进行本工程的维修交底；准备现场文明施工及小区内成品保护所需的围挡、彩条布、警示标志牌等；并施工前及时协调甲方落实工程施工的材料堆放地点。三、施工技术方案一）土方开外及定位查明漏水点在配合甲方对水务公司所勘察找寻出的各个给水管道漏点进行有效、针对性的标识记录后，按照工序对所要进行施工的各个漏水点进行有范围的密闭式围挡。对周边小区场地进行警示标识或警戒防范。人工对施工区域原有绿地内草坪及苗木进行铲除、挖移并成品保护。对挖机开挖部位的成品保护后，挖机对所标识的漏水点进行土方开挖，所挖出土方进行现场所指定位置进行堆方，对地面进行保护。挖机挖土距至管道上表的30公分处，机械停止开挖。剩余土方由人工进行开挖，以防止管道二次破坏。土方开挖完成后，人工及时对管道管身、管头、接头等部位进行清理，准确查明管道漏水点部位、原因。二）管道渗漏修补有渗漏管道维修需在泄空无压状态下进行。由于室外地下给水管道材质常用为钢管、铸铁管道和塑料管。依施工常见引起给水管道渗漏的位置和表现形式为：管道承插口渗漏、管道及管件锈蚀、管道爆裂、管道出现的砂眼、设计、施工等原因。修补时需要针对性的选择修补材料和方法，确保修补质量。Thisplansummarizesthevariousleakageproblemsthatmayoccurinthewatersupplypipelinesmadeofdifferentmaterials,toensurethatallkindsofleakageproblemsintheoutdoorwatersupplynetworkofthisprojectcanberepaired.2.1Treatmentofsteelpipeleakage2.1.1ThreadedconnectionleakageIfthethreadisnottightenough,itcanbetightenedwithhempthread.Ifthewatersupplypipelinefittingsarecrackedorrusted,theyshouldbereplaced.Forseverecorrosion,pipecracksorexcessivethreaddamageattheconnection,anewpipelineshouldbereplaced.2.1.2LeakageofflexiblejointsIftheflexiblejointandthejointnutleak,tighteningtheboltscangenerallystoptheleak.Ifitdoesnotwork,theoldgasketshouldbereplaced.2.1.3FlangeleakageFlangeleakageisgenerallycausedbyloosebolts,whichcanbefixedbytighteningthebolts.Ifthereisnogasketbetweentheflanges,agasketshouldbeadded.2.1.4PipesandholesandrustForsandholes,theHafcopluggingmethodcanbeused.Awoodenwedgeisinsertedintothehole,thenarubberclothof2-3mmisadded,andfinally,theappropriateHafcoclampisselectedaccordingtothepipediameterandtightenedwithbolts.Forseverelycorrodedpipes,thepipesneedtobereplaced.Cutoffoneorbothendsofthepipe,thencutasuitablelengthofpipeandconnectitwithaflexiblejoint.2.1.5PipebodyruptureFortherupturedsteelpipebody,itisgenerallyrepairedbyreplacingthepipe.Smallpipescanbeconnectedwithflexiblejoints,andlargepipescanbeweldedwithflangesorweldedconnectionsatbothends.Smallcracksorlargeholesonsteelpipescanbeweldedwithelectricwelding.2.2Leakageofcastironpipes2.2.1LeakageatsocketjointsofcastironpipesForthegreenjointinterface,thejointcanbetightened.Forasbestoscementinterfaces,suchasstresscementmortarinterfaces,gypsumcementinterfaces,etc.,theinterfacematerialcanberemovedandreconnected.Forflexiblerubberringinterfaces,iftherubberringisnotcorrectlypositionedornottight,therubberringpositioncanbecorrectedandconnected.Iftherubberringisagedorbroken,itneedstobereplaced.2.2.2SandholeleakageofcastironpipesPutsomeleadsheetsandfusesatthesandhole,andflattenthemwithahammer.Ifthereisnoleakage,itisokay.TheHafcopluggingmethodcanalsobeused.2.2.3CrackedcastironpipesIfthecrackissmall,wrapitwitharubberplateandclampitwithaclip.Ifitisalargeleakthatcannotberepaired,cutoffthecrackedpipesection,addasleeve,andre-fillandconnect.2.2.4SevereleakageofcastironpipesTheentirepipelinemustbereplaced.Usesocketconnectionsononesideandsleeveconnectionsontheotherside.3)Siterestorationafterpipelineleakagerepair4.Environmentalprotectionmeasuresforconstructionsites1.DustpreventionmeasuresattheconstructionsiteBeforeconstruction,planandsetuptemporaryconstructionroads,andsprinklewateratanytimetoreduceroaddust.2.Coverexposedsoilwithshadingnetintime.2.NoisepollutionpreventionmeasuresReducethenoiseofconstructionmachinery.2、在施工过程中，必须对施工人员进行文明施工教