第23卷第5期2023年10月交摇通摇工摇程摇摇Vol.23No.5Oct.2023DOI:10.13986/j.cnki.jote.2023.05.008交通量配置下三车道出口枢纽互通改扩建设计杨水生,黄沙路(江西省公路科研设计院有限公司,南昌摇330002)摘摇要:枢纽互通是高速公路的重要节点,决定着高速公路能否发挥快速转换功能.本文基于樟树枢纽收集和恢复的基础性技术资料,从枢纽现状技术指标的要素评价、事故黑点分析、交通量预测等方面着手,梳理枢纽存在的主要问题,论证枢纽改造的必要性.分别将单向双车道匝道设计成单向三车道主线和单向三车道匝道,分析两种设计方式在交通量配置、平纵横指标、变速车道及渐变段长度等在取值方面存在的差异,并结合方案对比、分流区通行能力分析阐述两种设计方式的优缺点,并得出采用三车道主线出口更合适的结论.结合仿真分析进行安全性评价,结果表明:采用三车道主线出口进行设计在规范无相关规定的情况下是可行的.关键词:枢纽改扩建;三车道匝道;交通量配置;分流区通行能力中图分类号:U412郾38文献标志码:A文章编号:2096鄄3432(2023)05鄄043鄄08RenovationandExpansionDesignofThree鄄LaneExitHubInterconnectionUnderTrafficVolumeConfigurationYANGShuisheng,HUANGShalu(JiangxiHighwayResearchandDesignInstituteCo.Ltd.,Nanchang330002,China)Abstract:Thehubinterchangeisanimportantnodeofexpressway,whichdetermineswhethertheexpresswaycanplayafastconversionfunction.BasedonthebasictechnicaldatacollectedandrecoveredbytheZhangshuhub,thispaperreviewsthemainproblemsexistinginthehubanddemonstratesthenecessityofhubreconstructionfromtheaspectsofelementevaluationofthecurrenttechnicalindicatorsofthehub,analysisofaccidentblackspots,andtrafficvolumeprediction.Theone鄄waytwo鄄lanerampsaredesignedasone鄄waythreelanemainlineandone鄄waythree鄄lanerampsrespectively.Thedifferencesbetweenthetwodesignmethodsintermsoftrafficvolumeconfiguration,horizontalandverticalindicators,laneswithvariablespeedandtransitionsectionlengthsareanalyzed.Theadvantagesanddisadvantagesofthetwodesignmethodsaredescribedincombinationwithschemecomparisonandtrafficcapacityanalysisofdiversionarea,andaconclusionisdrawnthattheuseofthree鄄lanemainlineexitsismoreappropriate.Theresultsofsafetyevaluationcombinedwithsimulatio...
