第41卷第8期2023年8月文章编号：1009-7767（2023)08-0156-04Vol.41,No,8JournalofMunicipalTechnologyAug.2023D0I:10.19922/j.1009-7767.2023.08.156互通式立交出口竖曲线研究姜诚*,甘军,刘峰,易天天(中国葛洲坝集团勘测设计有限公司，湖北武汉430070)摘要：互通式立交出口匝道鼻端瞬时速度由主线设计速度决定，车辆经过渐变段和减速车道进行缓慢减速，进入匝道后通过运行速度过渡段减速至控制曲线的设计速度，但互通式立交出口处的竖曲线视距和缓和冲击仍是现行规范中保障行车安全的关键。结合现有模型以及研究成果，对互通式立交出口竖曲线进行了研究，认为凸形竖曲线和凹形竖曲线半径均应以停车视距为计算依据，并对停车视距进行了修正，计算了互通式立交出口凹形竖曲线与凸形竖曲线所需半径值，为相关设计人员提供了参考依据。关键词：互通式立交；凸形竖曲线；凹形竖曲线；停车视距；识别视距；缓和冲击中图分类号：U412.33Abstract:Theinstantaneousspeedatthenoseendoftheinterchangeexitrampisdeterminedbythedesignspeedofthemainline.Thevehicleslowlydeceleratethroughthegradualchangesectionandthedecelerationlane,andthendeceleratetothedesignspeedofthecontrolcurvesthroughtherunningspeedtransitionsectionafterenteringtheramp.Buttheverticalcurvesightdistanceandthecushionattheexitoftheinterchangearestillthekeytoensurethesafetyoftrafficinthecurrentspecifications.Combiningwiththeexistingmodelsandresearchresults,theverticalcurvesoftheinterchangeexitarestudied.Itisconcludedthatbothconvexverticalcurvesandconcaveverticalcurvesshouldbecalculatedbythestoppingsightdistance.Thestoppingsightdistanceismodifiedtocalculatetherequiredradiusvaluesfortheabovecurvesatinterchangeexits,whichprovidesareferencebasisforrelevantdesigners.Keywords:interchange;convexverticalcurve;concaveverticalcurve;stoppingsightdistance;identifyingvisualdistance;cushion文献标志码：AStudyonVerticalCurveattheInterchangeExitJiangCheng*,GanJun,LiuFeng,YiTiantian(ChinaGezhoubaGroupInvestigation&DesignCo.,Ltd.,Wuhan430070,China)在互通式立交设计中，保障行车安全是设计控制要素之一。高速公路交通事故主要发生在互通式立交出口上游以及人口鼻端下游300m范围内"]。国内外相关研究表明，互通式立交出...
