港珠澳大桥英语演讲ppt

HongKong-Zhuhai-MacaoBridgetomaketheworldconvenient姓名日期Contents4、TheImmersedTubeTunnel2、FeaturesandDifficulties5、TheSignificances1、BriefIntroduction3、TwoArtificialIslands3.工程总体方案Thefirstmajorcombinedbridgeandtunnelsea-crossingprojectinChina.CostapproximatelyRMB105billion.Constructionbeganin15December2009atZhuhai.WillreducetraveltimefromHongKongtoMacauorZhuhaifromoverthreehourstojusthalfanhour.1.BriefIntroductionHongKong–Zhuhai–MacauBridge:theworld`slongestsea-crossingbridge,oneofthemostchallengingconstructionsofitskindundertakenintheworldtodate.TwoartificialislandsAnimmersedtubetunnelTheY-shapedbridge1.BriefIntroductionTotallenght:49.97kilometersUnderwatertunnel:6.7kilometersBridgeoverthesea:23kilometersMacauLinkRoadZhuhaiLinkRoadOffshoreBridge-and-TunnelHKLinkRoadHKport1.BriefIntroduction1.thelifespanofthebridgeissetat120years.2.Itreportedlycanstandmagnitude-8earthquake,scale-16typhoonaswellasthecollisionwitha300,000-tonship1.BriefIntroductionthisprojectfeaturesadesign-and-buildcontract,coordinationofthethreeregionalgovernmentsintheconstructionandmanagement,andcloseattentionfromthesociety.Moreover,thereareenvironmentalconstraintsasthealignmentrunsacrossthenationalconservationareafortheChinesewhitedolphins,aswellascomplicatednavigationtrafficconditionsastheroutecrossesthebusiestshippingareaoftheLingdingSea.2.FeaturesandDifficultiesHongKong-Zhuhai-MacaoBridgeisthenationalkeyprojectfeaturedwithstrategicsignificance,largeinvolvement,highlydifficultlevelofconstruction,longconstructiontime,highrequirementontechnicaldesignandenvironmentalprotection,manyparticipantparties,complexmanagementandcoordination.2.FeaturesandDifficulties3.TwoArtificialIslandstheWestArtificialIslandtheEastArtificialIsland•TheEastIslandhas59roundsteelcylinders圆钢筒.•TheWestIslandhas61roundsteelcylinders.•Thediameterofasinglecylinderis22.0m,andthecylinderwallis16mmthick.•Theheightofroundsteelcylinderis40.5mto50.5m.•Theroundsteelcylinderweighs445tto507t.3.TwoArtificialIslands4.TheImmersedTubeTunnelThewaterresistanceratiomustbelimitedto10%topreventaccumulationofsedimentattheLingdingyangChannel,otherwiseitwillimposeseriousimpactonthePearlRiverflowpathandflood-dischargecapacity,accordingtoagovernmentreport.Duetothelongdistancesbetweenthecities,theprojectisactuallyaseriesofbridgesandtunnels,connectedbyartificialislands，thiswasthefirsttimeChinahasbuiltanimmersedtubetunnel（沉管隧道）inopenwaters.The33tubeswillcomposea5.6-kilometerimmersed-tubetunnel,whichisdesignedtobeanimportantpartofthebridge.Eachofthetube,withaweightof80,000tonsandalengthof180meters,takesabouttwomonthstobuild.4.TheImmersedTubeTunnel5.TheSignificancesBritishnewspaper“TheGuardian”namedthemegastructureoneofits“sevenwondersofthemodernworldnearcompletion.”ItwillbethefirstnewlandtransportlinkbetweentheeastandwestcoastsofthePearlRiver,ThebridgewillbenefittheeconomicdevelopmentofthewholeoftheDelta.Thebridgewillcreatearegionaltransportnetwork,improvinguponwhatisconsideredtobeaweaklandtransportnetworkcurrentlyinplaceTheEnd!Thanksforyourattention!