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1、摘要本设计为省市至市一级公路K0+000—K3+010.468标段设计。依据道路的功能将公路定位为平原一级公路，设计时速为80Km/h，设计年限为20年，路面结构设计为沥青路面。根据交通量和交通增长量，将公路确定为双向4车道公路。主要设计包括：路线设计、路基排水设计、路面结构设计和挡土墙设计。根据地形图特点和选线原则，经过比选确定最佳路线。标段全长3010.468m，路线中间设二个交点，圆曲线半径分别为600m，800m，竖曲线设3个交点，半径分别为12000m、7000m、5000m。在此基础上进行横断面设计和路基排水设
2、计，并经过计算和对比确定路面结构层和结构层厚度。在高填方路段进行挡土墙设计，通过计算确定挡土墙断面形式和尺寸。整个设计在技术经济论证分析的基础上完成了平纵横断面设计，路基和路面结构设计，专题挡土墙的设计计算，并进行了道路概预算，完成了整个设计任务。关键词：一级公路选线路基路面挡土墙AbstractThedesignisafirst-classhighwaydesignfortheK0+000-K3+010.468tendersoftheroadfromXuchangCity,HenanProvince,toLuoheCit
3、y.Dependingonthefunctionalityoftheroad,theroadwaspositionedasafirstclasshighwaylocatedinplain,thedesignspeedofwhichis80Km/handthedesignlifeofwhichis20years.Thedesignpavementstructureisasphaltpavement.Accordingtothetrafficandtrafficgrowthvolume,thehighwaywasidentif
4、iedasafour-lanehighway.Highwaystructuredesignisasphaltpavement.Themaindesignincludes：routedesign,subgradedrainagedesign,pavementanddrainagedesignandretainingwalldesign.Accordingtothefeaturesoftopographicandtheprincipleoflineselection,Ideterminedthebestrouteafterco
5、mparison.Fulllengthofthetenderis3010.468m,withinit,therearetwointersectionslocatedinthehorizontalcurve,theradiusofwhichare600mand800mrespectively,andtherearethreeintersectionslocatedintheverticalcurve,theradiusofwhichare12000m,7000mand5000m,respectively.Cross-sect
6、ionaldesignandsubgradedrainagedesignwerebasedonit,andthepavementdesignwasdeterminedthroughcalculatedandcomparedtodeterminepavementlayerandthethicknessofstructure.Moreover,theretainingwallinhighfillsectionswasdeterminedbycalculatingtheretainingwallsectionformsandsi
7、zes.Onthebasisoftechnicalandeconomicfeasibilityanalysis,thedesignhavecompleteddraphicdesign,Profiledesign,cross-sectionaldesign,subgradeandpavementstructuraldesign,retainingwalldesignandbudgetestimate.Inshort,thedesignhavecompletedallthetask.Keywords：Firstclasshig
8、hwayRoutedesignSubgradePavementstructureRetainingwall目录第一章绪论11.1选题的目的和意义11.2设计主要任务1第二章设计说明32.1设计容32.2沿线地理条件与地质资料32.3气候条件32.4交通量资料和车道数确定32.5确定设计时速42.6确定公
