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摘要本设计为丘陵区的一条二级公路设计，起点高程为73.86m，终点高程为57.70m，地势较为平坦。设计路段为K122+000.00到K124+834.17段，全长2834.17m，采用双向两车道形式，无中央分隔带，设计时速为60km/h，路面采用水泥混凝土路面。整个排水系统由边沟、排水沟组成。挡土墙采用重力式挡土墙。本设计分为初步设计和详细设计两个阶段。52544
初步设计中，首先根据交通量确定道路等级，再根据相关规范和要求，在地形图上进行初步选择路线，然后对初选路线进行修改和完善，包括圆曲线半径、缓和曲线长度等。最后在地形图上确定最佳路线。
详细设计从确定的路线进行平面设计，纵断面设计，横断面设计，前期工作较初步设计更具体化，此外还对路基，路面，排水进行了详细设计。
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。
毕业论文关键词：路线设计，纵断面设计，平面设计，横断面设计
ABSTRACT
This design is about a road of second grad in the hills area. The elevation of the start point is 73.86m,the elevation of the end is 57.70m.Topography are flat. The road designed is from K122+000.00 to K124+834.17 and the total length of the proposed highway is 2834.17m,it is a two-lane two-way road, designing speed is 60km/h.This design 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, we can determine a primary route according to the relevant specification and requirements and improve the primary route, in last, a best route is determined in the terrain map.
In the detailed design process, horizontal design, vertical design and the cross-sectional design will be conducted from the determined program.
The prime task is more concretely than the primary design. Furthermore, the subgrade and pavement have been designed in stress as well.
This design not only can make us understand the each step of construction in building roads, and can also make us use AUTOCAD for drawing skilled.
Keywords: route selection, vertical design, horizontal design, cross-sectional design.
目录
第一章 设计总说明1
1.1 路线位置图1
1.2 主要设计内容..1
1.2.1 路线设计1
1.2.2 路基路面设计.1
1.2.3 施工组织设计.1
1.3 设计基本要求..1
1.4 路线概况.1
1.5 设计资料.2
第二章 路线平面设计.2
2.1 确定公路等级..2
2.1.1 已知资料2
2.1.2 交通量计3
2.1.3确定公路等级..3
2.2 选线设计.3
2.2.1 选线基本原则.3
2.2.2 选线的步骤和方法..4
2.3 平面设计.4
2.3.1 平面设计技术指标的确定..5
2.3.2 圆曲线.6
2.3.3 缓和曲线6
2.3.4 平曲线计算..6
第三章 路线纵断面设计16
3.1 纵坡设计要求16
3.1.1 纵坡16
3.1.2 坡长17
3.1.3 缓和坡段.17
3.2 竖曲线设计.17
3.2.1 竖曲线半径18
3.2.2 竖曲线要素计算.18
第四章 路线横断面设计24
4.1 路基设计..24
4.1.1 路基宽度的确定.24
4.1.2 路拱坡度.25
4.1.3 边坡坡度.25
4.1.4 边沟坡度.25