摘要本设计为重庆山区二级公路设计,该段路线总长为4210M。本设计中设计车速为60KM/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,主要包括结构层的拟定和设计层厚度计算。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。53199
毕业论文关键词:山区;二级公路;纵断面;横断面;排水;路基。
Abstract
This design is a secondary road of the Chongqing mountain and the total length of the section is 4210m. The design speed is 60km/h and the road has two lanes.
The parameters which are needed in the design are defined by analyzing the traffic and searching the corresponding technical specification. Finally the secondary road’s technical specification is designed. Based on the surrounding terrain, the alignment of the highway is designed, which has three corners. 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 mainly contains the selection of the structure layer and the calculation of the layer thickness. 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.
Key words:mountainous regions, secondary roads; vertical section, cross section ;drainage; roadbed;
目 录
第一章 绪论 1
1.1概述 1
1.2设计依据 1
1.3设计(论文)的主要内容 1
1.4设计(论文)的基本要求 2
1.5 路线及工程概况 2
1.6 沿线气候、水文特征、地形地震地理及其与公路的关系 2
1.7 沿线材料分布情况 3
1.8 环境保护 3
1.9 新技术采用及计算机运用情况 3
1.10 其他事项 3
第二章 平面线形设计 5
2.1 公路等级的确定 5
2.1.1 相关资料 5
2.1.2 公路等级的确定 5
2.2 选线设计 6
2.2.1 选线的基本原则: 6
2.2.2 选线的步骤和方法: 6
2.3平曲线要素值的确定 7
2.3.1 平面设计原则: 7
2.3.2 平曲线要素值的确定: 7
2.4路线曲线要素计算 12
2.4.1 路线简介 12
2.4.2 曲线要素 12
2.5 各点桩号的确定