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.,1,HongKong-Zhuhai-MacaoBridge,tomaketheworldconvenient,SuperEngineering,姓名日期,.,2,Contents,1、BriefIntroduction,3、TwoArtificialIslands,3.工程总体方案,Thefirstmajorcombinedbridgeandtunnelsea-crossingprojectinChina.CostapproximatelyRMB105billion.Constructionbeganin15December2009atZhuhai.WillreducetraveltimefromHongKongtoMacauorZhuhaifromoverthreehourstojusthalfanhour.,.,4,1.BriefIntroduction,HongKongZhuhaiMacauBridge:theworldslongestsea-crossingbridge,oneofthemostchallengingconstructionsofitskindundertakenintheworldtodate.,.,5,TwoartificialislandsAnimmersedtubetunnelTheY-shapedbridge,1.BriefIntroduction,.,6,Totallenght:49.97kilometersUnderwatertunnel:6.7kilometersBridgeoverthesea:23kilometers,MacauLinkRoad,ZhuhaiLinkRoad,OffshoreBridge-and-Tunnel,HKLinkRoad,HKport,1.BriefIntroduction,.,7,1.thelifespanofthebridgeissetat120years.2.Itreportedlycanstandmagnitude-8earthquake,scale-16typhoonaswellasthecollisionwitha300,000-tonship,1.BriefIntroduction,.,8,thisprojectfeaturesadesign-and-buildcontract,coordinationofthethreeregionalgovernmentsintheconstructionandmanagement,andcloseattentionfromthesociety.Moreover,thereareenvironmentalconstraintsasthealignmentrunsacrossthenationalconservationareafortheChinesewhitedolphins,aswellascomplicatednavigationtrafficconditionsastheroutecrossesthebusiestshippingareaoftheLingdingSea.,2.FeaturesandDifficulties,.,9,HongKong-Zhuhai-MacaoBridgeisthenationalkeyprojectfeaturedwithstrategicsignificance,largeinvolvement,highlydifficultlevelofconstruction,longconstructiontime,highrequirementontechnicaldesignandenvironmentalprotection,manyparticipantparties,complexmanagementandcoordination.,2.FeaturesandDifficulties,.,10,3.TwoArtificialIslands,theWestArtificialIsland,theEastArtificialIsland,.,11,TheEastIslandhas59roundsteelcylinders圆钢筒.TheWestIslandhas61roundsteelcylinders.Thediameterofasinglecylinderis22.0m,andthecylinderwallis16mmthick.Theheightofroundsteelcylinderis40.5mto50.5m.Theroundsteelcylinderweighs445tto507t.,3.TwoArtificialIslands,.,12,4.TheImmersedTubeTunnel,.,13,Thewaterresistanceratiomustbelimitedto10%topreventaccumulationofsedimentattheLingdingyangChannel,otherwiseitwillimposeseriousimpactonthePearlRiverflowpathandflood-dischargecapacity,accordingtoagovernmentreport.Duetothelongdistancesbetweenthecities,theprojectisactuallyaseriesofbridgesandtunnels,connectedbyartificialislands,thiswasthefirsttimeChinahasbuiltanimmersedtubetunnel(沉管隧道)inopenwaters.The33tubeswillcomposea5.6-kilometerimmersed-tubetunnel,whichisdesignedtobeanimportantpartofthebridge.Eachofthetube,withaweightof80,000tonsandalengthof180meters,takesabouttwomonthstobuild.,4.TheImmersedTubeTunnel,.,14,5.TheSignificances,Britishnewspaper“TheGuardian”namedthemegastructureoneofits“sevenwondersofthemodernworldnearcompletion.”ItwillbethefirstnewlandtransportlinkbetweentheeastandwestcoastsofthePearlRiver,ThebridgewillbenefittheeconomicdevelopmentofthewholeoftheDelta
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