辽宁科技大学本科生毕业设计 第 I页
丹通高速公路A1B1段综合设计
摘要
本次设计为高速公路综合设计路段，此路段位于本溪境内，根据设计公路的交通量、地形特征以及使用任务和性质，确定公路等级为高速公路。在此基础上，结合沿线自然条件与主要技术指标，进行路线方案论证与比选，最终确定一个最佳方案进行详细技术设计。其主要内容包括：路线的平、纵、横设计，路基、路面设计和排水设计以及交通设施设计, 并完成施工图设计阶段应完成的各种图、表及设计说明书。本设计严格依据规范的各项指标进行，最后确定本高速公路设计速度为100km/h，路基宽26m，双向4车道，路线全长3664.499m，路面为沥青混凝土面层，厚18cm，全线共设计了3个平曲线、3个竖曲线、3座桥梁、1条隧道，2道钢筋混凝土管涵、3个天桥。
关键词 高速公路；平曲线；竖曲线；路基；路面
辽宁科技大学本科生毕业设计 第 II页
The General Design of Dantong express
from A1 to B1
Abstract
This express section is located at the east of Liaoning province，which is heavy highland area．According to the requirements of mountain highway design, the grading of express is based on the traffic volume, the use of task and nature. Then, through combining natural conditions along and the main technical indicators, evaluating and electing the route, this express section ultimately determine the best option for a detailed technical design. Its main contents include: plane design, vertical curve design, transect curve design, roadbed design, road surface design, drainage design and traffic facilities design. In addition, all kinds of the figures, tables, and specifications are given in detail in this paper. After conducting technical feasibility studies accord to specification, the designing velocity is 100 km / h. The width of the roadbed is 26 meters with four two-way lanes. The length of the road is 3664.499meters. The road’s surface is paved by asphalt concrete. There are three plane curves, three vertical curves, a total of three bridges, one tunnel, two culverts ,and three overpasses.
Keywords Express；Plane curve；Vertical curve；Roadbed；Pavement
辽宁科技大学本科生毕业设计 第 III页
目 录
摘 要 ....................................................................................................................................... I ABSTRACT........................................................................................................................... II 目 录 .................................................................................................................................... III 1 绪论 .................................................................................................................................... 1
1.1 项目建设的背景及其建设的意义 ................................................................................ 1
1.1.1 项目建设背景 ......................................................................................................... 1 1.1.2 道路所处的地理位置 ............................................................................................. 1 1.1.3 道路建设的意义 ..................................................................................................... 2 1.2 沿线地形、地质、气候特征 ........................................................................................ 2 1.2.1 气候特征 ................................................................................................................. 2 1.2.2 水文特征 ................................................................................................................. 2 1.2.3 地形与土质特征 ..................................................................................................... 3
2 方案的拟定与比选........................................................................................................ 4
2.1 设计资料 ........................................................................................................................ 4 2.2 道路技术等级的确定 .................................................................................................... 4 2.3 有关技术标准汇总 ........................................................................................................ 5
3 路线方案具体比选........................................................................................................ 7
3.1 路线选线的原则 ............................................................................................................ 7 3.2 路线选线的过程 ............................................................................................................ 8 3.3 方案对比 ........................................................................................................................ 8
4 路线设计 ........................................................................................................................ 10
4.1 平面设计 ...................................................................................................................... 10 4.1.1 直线 ....................................................................................................................... 10 4.1.2 圆曲线 ................................................................................................................... 10 4.1.3 缓和曲线 ............................................................................................................... 10 4.1.4 平曲线设计示例 ................................................................................................... 11 4.2 纵断面设计 .................................................................................................................. 14 4.2.1 纵断面设计的作用和基本要求 ........................................................................... 14 4.2.2 最大纵坡 ............................................................................................................... 14 4.2.3 最小纵坡 ............................................................................................................... 14
辽宁科技大学本科生毕业设计 第 IV页
4.2.4 坡长限制 ............................................................................................................... 14 4.2.5 设计示例 ............................................................................................................... 15 4.3 平、纵线形组合设计 .................................................................................................. 17 4.3.1 平、纵线形组合的一般设计原则 ....................................................................... 17 4.3.2 平纵组合的一般要求 ........................................................................................... 17
5 路基横断面设计 .......................................................................................................... 19
5.1 路基横断面设计 .......................................................................................................... 19 5.1.1 横断面的组成 ....................................................................................................... 19 5.1.2 横断面设计要素的确定 ....................................................................................... 19 5.2 路基边坡设计 .............................................................................................................. 20 5.2.1 路堤边坡 ............................................................................................................... 20 5.2.2 路堑边坡 ............................................................................................................... 20 5.3 路拱横坡及超高 .......................................................................................................... 21 5.3.1 路拱形式及横坡度 ............................................................................................... 21 5.3.2 超高设计与计算 ................................................................................................... 21 5.4 挡土墙设计 .................................................................................................................. 24
6 排水设计 ........................................................................................................................ 25
6.1 路面表面排水 .............................................................................................................. 25 6.2 沟渠设计 ...................................................................................................................... 25 6.2.1 边沟设计 ............................................................................................................... 25 6.2.2 截水沟设计 ........................................................................................................... 26 6.2.3 排水沟 ................................................................................................................... 27 6.3 涵洞 .............................................................................................................................. 28 6.4 天桥设计 ...................................................................................................................... 30
7 路面设计 ........................................................................................................................ 31
7.1 路面等级与路面类型选择 .......................................................................................... 31 7.1.1 轴载分析 ............................................................................................................... 31 7.1.2 结构组合与材料选取 ........................................................................................... 33 7.3 各层材料的抗压模量与劈裂强度 .............................................................................. 34 7.4 土基回弹模量的确定 .................................................................................................. 34 7.5 设计指标的确定 .......................................................................................................... 34 7.5.1 设计弯沉值 ........................................................................................................... 34 7.5.2 各层材料的容许层底拉应力 ............................................................................... 35 7.6 设计资料总结 .............................................................................................................. 36 7.7 确定石灰土层厚度 ...................................................................................................... 36 7.8 拉应力验算 .................................................................................................................. 37 7.8.1 细粒式沥青混凝土层底拉应力验算 ................................................................... 37 7.8.2 中粒式沥青混凝土层底拉应力验算 ................................................................... 38
辽宁科技大学本科生毕业设计 第 V页
7.8.3 粗粒式沥青混凝土层层底拉应力验算 ............................................................... 38 7.8.4 水泥稳定碎石层层底拉应力验算 ....................................................................... 38 7.8.5 石灰土层层底拉力验算 ....................................................................................... 39
8 道路交通安全设施设计 ............................................................................................ 40
8.1 护栏 .............................................................................................................................. 40 8.2 视线诱导设施 .............................................................................................................. 40 8.3 标志与线标 .................................................................................................................. 40
9 扶壁式挡土墙尺寸确定及其稳定性验算（专题） ......................................... 42
9.1 扶壁式挡土墙的特点及适用条件 .............................................................................. 42 9.2 扶壁式挡土墙设计的基本思路 .................................................................................. 42 9.3 扶壁式挡土墙设计一般规定： .................................................................................. 42 9.4 一般构造要求： .......................................................................................................... 42 9.5 扶壁式挡土墙的具体计算 .......................................................................................... 43 9.5.1 设计资料 ............................................................................................................... 43 9.5.2 土压力计算 ........................................................................................................... 43 9.5.3 墙身及尺寸的确定 ............................................................................................... 44 9.5.4 墙身稳定性及基底应力验算 ............................................................................... 48
结 论 .................................................................................................................................. 50 致 谢 .................................................................................................................................. 51 参考文献 ............................................................................................................................... 52 附 录 .................................................................................................................................. 53