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1水泥搅拌桩在中国的应用和发展以及使用案例ApplicationanddevelopmentofSoil-cementmixingpilesinChinaandCaseStudy2015-9-252目录一、水泥系深层搅拌法产生EMERGENCEOFDEEPCEMENTMIXINGMETHOD................3二、水泥搅拌桩在中国的应用和发展SOIL-CEMENTPILESINCHINA....................3三、中国水泥搅拌桩依据CHINACEMENT&SOILMIXINGPILEAPPLICATIONBASIS........53.1建筑规范BUILDINGCODES.....................................................53.2安全施工规范、规程SAFETYCONSTRUCTIONCODES,PROCEDURES........................5四、PADMA大桥钢桩加工场地水泥搅拌桩使用案例...................................6CASESTUDYOFSOIL-CEMENTMIXINGPILEADOPTEDINSTEELWORKSHOPINPADMABRIDGEPROJECT.......................................................................64.1项目概括GENERAL...........................................................61、第一次地质钻探(2014-8)FristGeologicalSurveyReport(2014-8).......72、补充地质钻探(2014-10)SupplementGeologicalSurveyReport(2014-10)..83、两次地质钻探对比CompareTableforTwoGeologicalSurveyReports........84.3施工现场试验结果CONSTRUCTIONSITETESTRESULTS................................93一、水泥系深层搅拌法产生EmergenceofDeepCementMixingMethod1、美国在第二次世界大战后曾研制开发成功一种就地搅拌桩—MIP工法,即从不断回转的、中空轴的端部向周围已被搅松的土中喷出水泥浆,经翼片的搅拌而形成水泥土桩,桩径0.3~0.4m,长度10~12米;Apilemixingin-situ(MIPconstructionMethod)issuccessfullydevelopedinAmericaafterthesecondworldwar.Soil-cementmixingpilesis0.3-0.4mdiameter,10-12mlength,formedbycementpastesprayedfromtheconstantlyrotaryhollowshafttosurroundedsoilwhichbecameloosecausedbythepanelsofhollowshaft'sdisturbing.2、1953年日本清水建设株式会社从美国引入这种施工工法,开始使用并改进,1974年研制成功水泥搅拌固化发(CMC工法),用于加固钢铁厂矿石堆场软弱土地基,加固深度达32m,后续继续改进形成多种工法如:竹中务店(株)的CDM法、清水建设(株)的DeMIC法、东亚建设工业(株)的DCCM法等,将水泥搅拌桩的单个搅拌一片的直径最大可达1.25m,一次加固的最大面积达到9.5㎡。In1953,JapanShimizuCorporationintroducedandimprovedMIPMethodfromAmerica,successfullydevelopedtoSoil-cementsolidificationmethod(CMCConstructionMethod).Itisadoptedbyreinforcingthesoftsoilfoundationofsteelplant'soreyard.Thereinforcedsoildepthmayreach32m.LatervariousconstructionmethodmodifiedsuchasCDMofTakenakaCorporation,DeMICofShimizuCorporation,DCCMofToaCorporation.Thediameterofsinglesoil-cementmixingpilehasbeenenlargedto1.25m,andonetimeofreinforcedareahasbeenreachedto9.5㎡.3、原苏联在1970年也研究成一种淤泥水泥土桩(类似美国MIP工法),用于港湾建设工程中。淤泥土的含水量虽高达100%~120%,但掺入15%的水泥以后,半年龄期强度可达3MPa。成本分析表明采用这种淤泥水泥土搅拌桩比钢筋混凝土桩的造价要低40%。In1970,muck,soilandcementmixedpilewasdevelopedforharborconstructioninformerSovietUnion(similartoAmericaMIPconstructionmethod).The180day’sstrengthcanreach3mp,althoughwatercontentofmuckisupto100-120%.Costanalysisshowsthatthecostofthispileis40%lowerthanreinforcedconcretepile.二、水泥搅拌桩在中国的应用和发展Soil-cementpilesinChina1、1977年10月中国原冶金部建筑研究总院地基所和交通部水运规划设计院开始进行深层搅拌法的室内试验和施工机械的研制工作。1980年在上海宝山钢铁总厂由第五冶金建设公司在三座卷管设备基础软土地基加固工程中正式采用深层搅拌法并获得成功。同年11月由冶金部基建局主持,正式通过“饱和软黏土深层搅拌加固技术”鉴定认为,成为今后可逐步推广使用的技术标准。InOctober,1977,FoundationdepartmentofCentralResearchInstituteofBuildingandConstruction,ChinaformerMinistryofMetallurgicalIndustryandWatertransportationplanninganddesigninstituteofMinistryofCommunicationsbegantoresearchanddevelopmentworksforlaboratoryexperimentandconstructionequipmentofdeepcementmixingmethod.In1980,Deepcementmixingmethodwassuccessfullyadoptedbythe5thmetallurgicalconstructioncorporationofChinaforsoilreinforcingofthreepipe-rollingequipmentfoundationproject,ShanghaiBaoshanGeneralIronandSteelworks.IntheNovemberofthesameyear,hostedbyCapitalConstructionDepartmentofformerMinistryofMetallurgicalIndustry,Saturatedsoftclaydeepmixingreinforcementtechniquewasachievedthroughtheevaluationandbecamethetechnicalstandard4whichcouldbegraduallypopularizedforuse.2、l982年又在上海宝钢纬三路P-5号污水处理站基坑开挖中,国内第四次采用壁状深层搅拌水泥土桩,作为护坡措施获得成功。1981年因内已能批量生产SJB型成套深层搅拌机械,并开始组建专门的施工公司。In1982,Chinafourthlysuccessfullyadoptedwallshapedeepmixingsoil-cementpilemethodforslopeprotectionintheexcavationworkofP-5sewagetreatmentstationofShanghaiBaosteelWeisanRoad.In1981,ChinawasabletomassproductionoftypeSJBcompletesetofdeepmixingequipment,andbegantoestablishspecializedcompany.3、1980年初天津市机械施工公司与交通部一航局科研所等单位合作,利用日本进口螺旋钻孔机械进行改装,制成单搅拌轴、翼片喷浆深层搅拌机,1981年在天津造纸厂蒸煮锅改造扩建工程中首次应用也获得成功。1983年浙江大学土木系联合当地施工单位,也制造出DSJ型单轴喷浆陆上型水泥系深层搅拌机。1987年交通部第一航务工程局在天津新港东突堤南侧码头接岸结构的软基处理工程中引人日本竹中工务店的CDM工法。Inthebeginningof1980s,TianjingMechanizedConstructionCompanycooperatedwithNo.1EngineeringCompanyLtdofFormerMinistryofTransportation,refittingJapanaugerboringmachinetodeepcementmixingmachinewhichwassingle-shaft,wingpanel-gunitingandfirstsuccessfullyusedindigesterreformingandexpandingprojectofTianjingPaperMill.In1983,CivilConstructionDepartmentofZheJiangUniversityunitedlocalconstructioncompany,alsodevelopedDJStypelandsing-shaftgunitingdeepcementmixingmachine.In1987,No.1EngineeringCompanyLtdofFormerMinistryofTransportation,introducedCDMconstructionmethodofTakenakaCorporationforitstreatmentofsoftsoilfoundationinDongtushoreconnectingstructure,southbankofTianjingNewHarbor.4、1991年开始各地的机械制造厂又因地制宜制造出了双搅拌轴,翼片喷浆型和可变轴距的双轴搅拌机。1997年由上海申元岩土工程有限公司和上海航天局809研究所联合研制出的“施工监控自动化-SJC型水泥搅拌桩注浆监测记录仪”得到了广泛的采用。它不仅是施工时测定水泥浆量的一种装置,而且可以控制并记录水泥浆量在桩身范固内分布的均匀程度,使施工质量得到可靠保证。In1991,somecompaniesdevelopedtypesofdoublemixing-shaft,wing-panelgunitingandflexibleshaftdistancemachine.In1997,ShanghaiShenYuanGeot
本文标题:水泥搅拌桩在中国的应用和发展以及使用案例10.10
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