铁道工程毕业设计正文【铁路选线设计】.doc 2页

摘要本文主要针对新建铁路精伊线塔尔至伊宁东段的初步设计及相关程序设计。设计的具体内容由以下几个部分组成：结合地形、地质条件，在带状等高线地形图上，按初步设计的步骤，选定线路的基本走向，并进行路基设计，包括线路的平面定线、平面设计、纵断面设计、横断面设计、路基土石方计算程序设计、平面坐标计算程序设计、及相关外文科技文献翻译一篇。平面定线过程中，根据坡度的变化定线；平面设计过程中，要注意使直线与曲线相互协调，充分考虑夹直线和缓和曲线长度的要求；纵断面设计中，注意最大坡度、坡段长度、坡段连接与坡度折减等问题，在变坡点处应合理设置竖曲线；在平面坐标计算程序设计中，采用Fortran语言编制计算程序；在横断面设计过程中，考虑曲线地段路基面加宽等问题。整个设计分几个阶段进行，每一阶段的工作都需要综合考虑、精心设计。设计的前后都要进行必要的比较、检算，符合标准以后，提交有关设计成果，完成设计。关键词：平面纵断面路基横断面 AbstractThearticleaimsindesigningnew-builtrailwaypreliminarilyforJingYilinefromTaertoYiningdongsectionandrelevantprograms.Theconcretecontentsofthedesignareasfollows:Followingtheproceduresofpreliminarydesign,combinethetopography、geologycondition,selectthebasictrendofthelineonthetopographicmapofbeltcontour,andstartthesubgradedesign，includinglevellocation、levelsectiondesign、profiledesign、crosssectiondesign、subgradecubicmeterofearthandstonecalculationprogramanddesign、levelcoordinatecalculationprogramoflineanddesign、translatingarelevantforeigntechnologicalbibliography.Duringthecourseoflevellocation,followthegradientchangestolocatetheline;Duringtheleveldesign,weshouldtakenoticetomakestraightlineandcurvecoordinateeachother,consideringadequatelythelengththatintermediatestraightlineandtransitioncurverequired;Inprofiledesign,wemustpayattentiontothemaximumgrade、theconnectionofgradesectionandcompensationofgradientetc;Onthegradechangepoint,weshoulddisposetheverticalcurvereasonably.Duringthecourseoflevelcoordinatecalculationprogramanddesign,usetheFortranLanguagetoprogram;Inthecrosssectiondesign,considertheproblemsofbroadeningsubgradeoncurvesection.Thewholedesignisdividedintoseveralstagestoconduct.Everystagerequiresintegratedconsiderationandcarefuldesign.Theessentialcomparisonandcheckoutbotharerequiredtodobeforeandafterdesigning.Whenthedesignconformstothestandard,submitrelevantachievementsofdesign,andthenfinishthedesignKeyWords:Levelsection、Profile、Subgrade、CrossSection