摘要，在本设计中，主要是进行二级路的设计。设计部分的公路全长7852m，设计车速60km/h，双向车道。
对交通量进行了分析，查找相应技术规范，确定公路的等级以及设计需要的各种参数。在平面图中进行选线，然后又对道路路线进行了平面线形设计，本路线有两段曲线设置缓和曲线，并设置超高。纵断面的设计中有五个竖曲线，并且也满足了平纵面线形组合设计中的各种要求。在横断面的设计中，确定了横断面组成及各种要素后，绘制横断面图。路基设计的基本内容，就是确定路基边坡的形状和坡度。在挡土墙设计中满足了各种稳定性的验算。路面设计内容中包括路面类型与结构设计。最后的概算设计为计算机辅助计算，同时也给出了各部分内容相关的表格与图纸。
通过这次设计不但了解建设公路的各个步骤，而且也能熟练的运用AUTOCAD进行制图。
关键词 二级公路 线形设计 路面 路基 挡土墙
Abstract，This design is a general one that is about a road of second grad from Xinxingtun to Lijiadian in the mountainous area, which is made up of primary design and detailed design.
In the primary design process, first of all, we should determine the road-grade according to the traffic volume, then, two spare routes are determined in the terrain map with a scale of 1:1000, including the plane design, the vertical section design, the transect design，the setting of the bridges and culverts. At last, there is a compare between the two projects and the better will be adopted.In the detailed design process, about 3.8 kilometers is selected from the projects determined. the prime task is more concretely than the primary design. Furthermore, subgrade, pavement and drainage, the bridges and culverts have been designed in stress as well. Besides, the project budgetiscompile simply, which is mostly about the account of the architectural and installing cost.Keywords traffic volume, road-grade, orizontal curve, vertical curve, drainage, subgrade, asphalt pavement, budget supervision
