1、 I 摘 要 本 设计是 从 信阳 到 商城某段二级公路 的 设计 , 该 段 路线总长为 3054m。本设计中 设计 车 速为 80km/h,双向两车道 。 本设计 是在对 交通量进行 分析,查找相应 的 技术规范 的基础上, 确定 出 公路的 技术等级以及设计需要的各种参数, 最终 确定采用二级公路的技术指标进行设计。 结合周围的地形情况 进行了平面线形设计, 平面线形中有三个转角 。纵断面的设计中有 两 个竖曲线, 满足 平纵 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 出 横断面图。 本 设计 中路面设计 采用沥青 路面 进行 设计,主要包括 结构层
2、 的 拟定 和 设计 层厚度计算 。 涵洞设计 主要是在拟定结构尺寸后进行 各种强度的验算。 设计中结合地形及周边环境条件,通过两条线路方案的比选,最终确定最佳方案。 关键词 :二级公路 ; 纵断面 ; 横断面 ; 沥青路面 ;涵洞 II Abstract This design is a secondary road design from Xinyang to Shangcheng and the total length of the section is 3054m. The design speed is 80km/h and the road has two lanes. The
3、parameters which are needed in the design are defined by analyzing the traffic and searching the corresponding technical specification. Finally the secondary roads technical specification is designed. Based on the surrounding terrain, the alignment of the highway is designed, which has three corners
4、. There are three vertical curves in the design of vertical alignment, which all meet the design requirement of the linear combination. In the cross section design, the cross section diagrams are drawn after determining the composition and cross section elements. The design of the asphalt pavement m
5、ainly contains the selection of the structure layer and the calculation of the layer thickness. The intension of the structure is checked after the selection of the dimensions of the structure in the culvert design. The design is combined with the terrain and surrounding environment conditions, and through the comparison of two line programs, the best solution is ultimately determined. Keywords: Secondary road, vertical section, cross section, Asphalt pavement,culvert