三级公路毕业设计论文

西南科技大学城市学院本科生毕业论文I绵阳市游仙区胜黎路改建工程设计摘要胜黎三级公路对绵阳市游仙区的经济发展有着重要的作用，本路段属于山岭重丘区，本着安全、经济、实用、美观的原则，对该路段进行设计。本路设计是在所在区的地形、地质、气候的影响下，按照设计规范进行设计的。设计的内容有：平面线性设计、纵断面设计、横断面设计、路基路面设计。平面线性设计包括线路对比，圆曲线、缓和曲线参数设定、直线设计等；纵断面设计包括拉坡、竖曲线设计等，竖曲线设计应注意行车视距和视线诱导问题即满足“平包竖”；横断面设计时，为使行车更舒适和确保道路的使用年限，在路段应做防护和排水设计，排水设计包括路基排水和路面排水并对涵洞进行了设计。关键词三级公路设计；平曲线；竖曲线；路基路面；排水西南科技大学城市学院本科生毕业论文IITheDesignofShengliRoad，YouxianofMianyangCityAbstracttheShengliRoadClassIIIhighwayhadtheimportentroletotheeconomicdevelopmentofMianyang，Youxian.Thisrouteeachparagraphbelongstohighmountains,Idesignedtheroadbasedonsecurity,economicandpractical,beautifulprinciples.Workingproperlytohopethehighwaydesignisundertheinfluenceofthegeography，geology,weatheroftheplaceregion,carryingonaccordingtothedesignnorm.Acontentsfordesignhave:Theflatsurfacelinedesign,verticalsectiondesign,crosssectiondesign,roadsubgradeandpavementdesign.Theflatsurfacelinedesignincludesthecompaeredselectline,acurve,themitigationcurveparameterenactment,straightlinedesignetc;theverticalsectiondesignincludestopullthegradient,verticalcurvedesignetc,attheverticalcurvedesign,therequestofnoticetogothecartoseetobeapartfromtoinducetheproblemtosatisfy“averticalcurve”namelywithview.Whenthecrosssectiondesign,consideredtheextremelyhighconstitution,makegothecarmorecomfortableandinordertoinsuretheusagetimelimitoftheroad,stilldidtheprotectionanddraindesignontheroadsegment.Draindesignincludestheroadsubgradeandroadsurface.AndalsodidtheculvertsdesignKeywordsthedesignofClassIIIhighway，Theflatsurfaceline，Verticalcurve，subgradeandpavement，Drain.西南科技大学城市学院本科生毕业论文III目录第1章绪论................................................................................................11.1道路运输的地位.....................................................................................11.1.1我国道路的现状.............................................................................11.1.2发展规划........................................................................................21.2拟建公路的设计概况.............................................................................21.3拟建公路的重要意义(可行性说明).......................................................41.4设计资料................................................................................................51.4.1设计的任务与内容.........................................................................51.4.2设计原始资料................................................................................5第2章选线及平面设计..................................................................................62.1公路等级的确定.....................................................................................62.1.1公路分级的标准..............................................................................62.1.2交通量的计算..................................................................................62.2设计速度的确定.....................................................................................72.3公路选线及路线方案比选......................................................................82.3.1选线的基本原则：...........................................................................82.3.2选线的步骤和方法...........................................................................82.3.3方案比选..........................................................................................92.4平面线性设计.......................................................................................102.4.1平面设计原则................................................................................102.4.2平面线性要素值的确定.................................................................112.4.3主要几何元素的计算.....................................................................122.4.4各点桩号的确定............................................................................14第3章纵断面设计..............................................153.1纵断面设计的主要内容及基本要求......................................................153.1.1主要内容........................................................................................15西南科技大学城市学院本科生毕业论文IV3.1.2基本要求........................................................................................153.1.3纵断面设计步骤............................................................................163.2纵坡设计应注意的问题........................................................................163.3纵断面设计步骤..................................................................................183.3.1竖曲线设计准备..........................................................................183.3.2竖曲线设计....................................................................................183.3.3竖曲线半径选择主要考虑以下因素..............................................193.4道路平、纵线性组合设计....................................................................203.4.1平、纵组合的设计原则.................................................................203.4.2平纵组合设计................................................................................203.4.3平曲线与竖曲线的组合.................................................................22第4章横断面设计.......................................................................................244.1横断