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1、中交路桥建设有限公司佛山市魁奇路东延线二期工程（禅城段）PW60-4钻孔灌注桩桩底沉渣处理方案编制：审核：日期：中交路桥建设有限公司佛山市魁奇路东延线二期工程（禅城段）项目经理部urbantrafficstructureintheurbanpublictransportsystem,railtrafficwithafast,largecapacity,lowpollutionandhighefficiency,becomeanindispensablepartofurbantrafficstructure,istheco
2、ntradictionbetweensupplyanddemandofthegrowingmetropolis,cities,effectivemeanstomeettheneedsofurbantraffic.Thefollowingtableisarailtransportandothermodesofurbanpassengertransportcapacity,transportationspeedandresourceconsumption,andsoon.Comparisonofurbanpassengert
3、rafficcharacteristicstable5.1-2trafficvolume(human/h)transportspeed(km/people)Roadareaoccupied(M2/people)scopebike2,00010-153,000shortcar20-5010-20widebus6,000-9,0001-240-600.25-0.5fromtheMetrolightrailof10,000-30,000inlong-distanceline3Morethan0,00040-60donotocc
4、upyanareabothintermsoftransportoverlongdistances,transportefficiency,orfromthelevelofresourceconsumptionandenvironmentalpollution,railtransportisundoubtedlyaneffectivemeanstosolvetheproblemoftrafficcongestionincities.Especiallyinurbanpopulationstrengthenormoustra
5、fficdemandontheroutetoeasetrafficpressure,railtransportationhasincomparableadvantages.Washington,DC,areaof177km2,andapopulationof600,000,isaUnitedStatespoliticalcenter.FortheWashingtonMetrosystemUnitedStatessecond-busiestsubway,secondonlytotheNewYorksubway,opened
6、in1976.Currentrailsizesfor5,station86,total171.6km,netannualpassengervolumereached223millionpeople.Accordingtostatistics,from2000to2009vehicletripdown12.7%,bustravelhasincreasedby12%.ObjectivesoftheWashingtonMetrosystemboilsdowntothefollowingthreepoints:bydriving
7、ontothetracksatthestationtransfermodeinordertoalleviatetrafficcongestion;Forthosewhowillnotorcannotdrivethepersonwithabetteroptionthanconventionalpublictransit;BlockhighwayPW60-4钻孔灌注桩桩底沉渣处理方案一、概述PW60-4桩基设计为嵌岩桩，设计桩底沉渣厚度要求不大于3cm，设计桩径2.0m,设计桩长39m,设计桩顶标高：+1.0m，设计桩底标高
8、：-38.0m，设计砼强度：C30，设计砼方量：122.46m³，设计要求桩尖进入持力层的深度不小于10m。PW60-4桩基施工时原地面标高3.52m,护筒标高：3.78m,开钻日期：2014年4月4日，终孔日期：2014年4月7日，终孔标高：-38.06m,下钢筋笼日期：2014年4月7日，砼灌注日期：2014年4
