多线船闸下游引航道通航水流条件及改善方案研究-豆柴文库

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多线船闸下游引航道通航水流条件及改善方案研究
Abstract
Thenavigationconditionsofthedownstreampilotchannelsofthemulti-lineshiplockandimprovementschemeswerestudied.Theflowvelocitiesanddirectionsofthewaterinthechannelsweremeasuredandanalyzed,andtheimpactoftheseconditionsonnavigationsafetywasevaluated.Basedontheresults,severalimprovementschemeswereproposedtooptimizethewaterflowconditionsandenhancethenavigationsafetyofthechannels.
Introduction
Themulti-lineshiplockiswidelyusedinwatertransportationsystemstofacilitatethemovementoflargevessels.However,thedownstreampilotchannelsofsuchlocksoftenfacechallengesrelatedtoinadequateflowconditions,whichcaninterferewithsafenavigation.Therefore,improvingthewaterflowconditionsinthesechannelsisessentialforenhancingnavigationsafety.Inthispaper,wepresentastudyonthewaterflowconditionsinthedownstreampilotchannelsofamulti-lineshiplockandproposeseveralimprovementschemestooptimizenavigationsafety.
Methods
Todeterminethewaterflowconditionsinthechannels,weconductedfieldmeasurementsofthewaterflowvelocitiesanddirectionsatdifferentlocationsalongthechannel.Weusedanelectromagneticflowmeter,aDopplercurrentprofiler,andawaterlevelgaugetomeasurethewaterflowparameters.Wealsousedanumericalsimulationmodeltoanalyzethewaterflowpatternsandtheirimpactonnavigationsafety.
ResultsandAnalysis
Ourmeasurementsshowedthatthewaterflowvelocitiesinthepilotchannelsweregenerallylow,rangingfrom0.3to0.8m/s.Thewaterflowdirectionswerefoundtobeinfluencedbythechannelgeometry,withvelocityvectordeviationsobservedatvariouslocations.Ournumericalsimulationsindicatedthatthelowwaterflowvelocitiescouldleadtosedimentbuildup,makingthechannelsnarrowerandshallower,whichwouldhindernavigation.
Thelowwaterflowvelocitiesinthechannelscanalsoposechallengestonavigationsafety,especiallyforlargervessels.Thelowwaterflowmayresultinlossofsteeringcontrol,maneuveringdifficulties,anddirectioninstability,allofwhichcouldincreasetheriskofaccidentsandcollisions.Thedeviationofthevelocityvectorfromthechannelcenterlinecouldalsoaffectt