黄河下游游荡性河段浮桥建设对河势及防洪的影响分析

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1、EFFECTANALYSISOFFLOATBRIDGEONRIVERREGIMECHANGEANDFLOODCONTROLONWANDERINGREACHESOFTHEYELLOWRIVER黄河下游游荡性河段浮桥建设对河势及防洪的影响分析李永强刘筠张靖LiYongqiangLiuYunZhangJingReconnaissanceDesignandResearchInstituteofYellowRiverHenanAdministrationBureau1Backgroundofthestudy项目研究背景2.BriefIntrod

2、uctionofFenkaifloatBridge封开浮桥简介3.AnalysisofEffectofFloatBridgeConstructiononFlowCondition浮桥建设对水流条件影响的分析4.AnalysisofPossibleEffectofFloatBridgeonRiverRegimeChanges浮桥建设对河势的可能影响分析5.ConclusionsandSuggestions结论和建议OutlineofthePresentation2Moreandmorefloatbridgeshavingbeenbuilt

3、onthelowerYellowRiverduetoEconomicdevelopmentSofar,53bridgesinShandongProvinceSince2000,floatbridgehasgraduallymovedtotheupperwanderingreachesoftheLowerYellowRiver.1.Backgroundofthestudy3Ceaselessgoingonofabnormalriverregimenearsomefloatbridgesmakepeoplepaymoreattentiont

4、otheeffectoffloatbridgeontheriverregimesStudyingthechangeinwaterflowandriverregime,andthepossibleeffectonfloodcontrolcanprovidepositiveandscientificbasisforthefuturefloatbridgeconstructionRiverregimeevolutionofDagongtowang’anreachfrom2004to2006Abnormalriverregime1.Backgr

5、oundofthestudy42.BriefIntroductionoftheFeng-KaiYellowRiverFloatBridgeFeb.2003begantobebuiltMar.2004opentotraffic.Thechannelofthereachwherethebridgeislocatedis690mwide,andthemainflowis4mdeepinaverageThefloatbridgeis880mlongintotalandrunsoverthenewfloodplainandthemainchann

6、el,andiscomposedof44sectionsThebodyofthebearingboatofthebridgeis21.38mlong,andsingleboatlengthis4.3mRouteofFengkaiFloatbridgeFengqiucountyofXinxiangcityKaifengcountyofKaifengcity53.AnalysisofEffectofFloatBridgeConstructiononFlowConditionTheflowconditionchangeswillbeanaly

7、zedforfourflowratemagnitudes(500m3/s,1000m3/s,2000m3/sand4000m3/s).FlowConditionPriortoFloatBridgeConstruction63.AnalysisofEffectofFloatBridgeConstructiononFlowConditionItemstobeanalyzedBackwatercalculationChangeofaverageflowvelocitySiltcarryingCapacityRiverbedlongitudin

8、aldeformation73.AnalysisofEffectofFloatBridgeConstructiononFlowConditionBackwatercalculationBackwaterhe