三级公路毕业设计论文

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1、 I *胜黎路改建工程设计胜黎路改建工程设计 摘要摘要 胜黎三级公路对*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

2、了设计。 关键词关键词 三级公路设计；平曲线；竖曲线；路基路面；排水 II The Design of Shengli Road，Youxian of Mianyang City Abstract the Shengli Road Class III highway had the importent role to the economic development of Mianyang，Youxian. This route each paragraph belongs to high mountains, I designed the road based on security, ec

3、onomic and practical, beautiful principles . Working properly to hope the highway design is under the influence of the geography， geology, weather of the place region, carrying on according to the design norm. A contents for design have: The flat surface line design, vertical section design, cross s

4、ection design, road subgrade and pavement design. The flat surface line design includes the compaered select line, a curve, the mitigation curve parameter enactment, straight line design etc; the vertical section design includes to pull the gradient, vertical curve design etc, at the vertical curve

5、design, the request of notice to go the car to see to be apart from to induce the problem to satisfy a vertical curve namely with view. When the cross section design, considered the extremely high constitution, make go the car more comfortable and in order to insure the usage time limit of the road,

6、 still did the protection and drain design on the road segment. Drain design includes the road subgrade and road surface. And also did the culverts design Keywords the design of Class III highway， The flat surface line， Vertical curve， subgrade and pavement，Drain. III 目目 录录 第 1 章 绪 论 . 1 1.1 道路运输的地位 1 1.1.1 我国道路的现状 . 1 1.1.2 发展规划 . 2 1.2 拟建公路的设计概况 . 2 1.3 拟建公路的重要意义(可行性说明). 4 1.4 设计资料. 5 1.4.1 设计的任务与内容 . 5 1.4.2 设计原始资料 5 第 2 章 选线及平面设计 6 2.1 公路等级的确定 . 6 2.1.1 公路分级的标准. 6 2.1.2 交通量的计