论文总字数：28964字

摘 要

本设计研究的是常武地区常漕一级公路C标段的初步设计。主要研究方法是在考察现场地质水文资料，查阅当地交通量等信息的基础上，为该地区设计出一条交通便利，线形合理，经济美观，使用年限长久的公路。

常武地区处于我国东部，路线所经地形为平原地区。本设计全线总长3741.555m，设计车速为100km/h，路基宽度为33.5m，为双向六车道。

本设计说明进行路线方案的论证，确定合适的设计方案，然后对所选方案进行包括路线的平、纵、横设计，路基路面设计和排水设计，等各方面内容。

关键词： 一级公路，平、纵、横设计，路基、路面设计，排水

Abstract

The design and research of Changwu area Changcao road standard preliminary design. The main research methods was investigated in field geological and hydrological data, check out the local traffic information based on, for this area design a convenient transportation, linear rational, economic appearance, use fixed number of year long road.

Changwu is located in the eastern part of China, the routes through the plain area. The design of full length3741.555m.The design speed of 120 km/h, roadbed width34.5m.

The design of the route scheme argumentation, determine the appropriate design, and choose an optimal scheme for the detailed design，including the flat, vertical, horizontal alignment design, design of roadbed and road surface and drainage design, and other aspects.

Key words: flat, vertical, horizontal design, subgrade, pavement design, drainage

目录

摘要...............................................................1

ABSTRACT..........................................................2

第一章 工程概述...........................................6

1.1 工程概况......................................................6

1.2沿线自然地理状况...............................................6

1.3 工程技术标准..................................................6

1.4 交通量资料....................................................6

1.5 设计依据和标准................................................7

第二章 路线平面确定.......................................8

2.1道路等级确定..................................................8

2.2 路线方案的拟定...............................................8

2.2.1选线原则.................................................8

2.2.2 平原地区选线特点.........................................9

2.2.3平原一级公路选线特点.....................................9

2.2.4 选线的一般方法和步骤....................................11

2.3 平面设计.....................................................12

2.3.1逐桩桩号计算............................................12

2.3.2 逐桩坐标计算............................................14

第三章 平面设计

3.1概述.........................................................17

3.2 直线.........................................................17

3.2.1 直线的特点..............................................17

3.2.2 直线的最大长度和最小长度................................17

3.3 圆曲线.......................................................18

3.3.1 圆曲线的最小半径........................................18

3.3.2 缓和曲线作用............................................18

3.3.3 平曲线的最小长度........................................18

3.3.4 行车视距................................................19

第四章 纵断面设计..................................................20

4.1 纵坡及坡长设计................................................20

4.1.1 概述......................................................20

4.1.2 最大纵坡..................................................20

4.1.3 最小纵坡..................................................20

4.1.4 坡长限制..................................................20

4.2 竖曲线.........................................................21

4.2.1 竖曲线的最小半径和最小长度...............................21

4.2.2竖曲线各要素的计算公式...................................22

4.3平纵组合设计设计...............................................23

4.3.1设计原则..................................................23

4.3.2平曲线和竖曲线的组合......................................23

4.4纵断面设计的方法和步骤.........................................24

第五章 横断面设计..................................................25

5.1 横断面布置....................................................25

5.2 路拱坡度设计..................................................25

5.3 超高..........................................................26

5.4 公路横断面的设计方法..........................................26

5.4.1设计原则..................................................27

5.4.2设计步骤..................................................27

第六章 路基设计.....................................................28

6.1 一般路基设计..................................................28

6.1.1 路基宽度.................................................28

6.1.2 路基高度.................................................28

6.1.3 路基断面形式和坡度.......................................28

6.1.4 路基压实.................................................29

6.1.5 一般路基的填筑方式.......................................29

第七章 公路排水设计.................................................30

7.1 公路排水系统的设计目的和要求.................................30

7.1.1 目的.....................................................30

7.1.2 要求.....................................................30

7.2 路基排水的一般原则...........................................30

7.3排水系统设计.................................................31

7.4 排水结构物设计...............................................31

7.4.1 排水边沟截面尺寸确定.....................................31

第八章 路面结构设计.................................................32

8.1 路面结构设计原则.............................................32

8.2 轴载换算.....................................................32

8.3 沥青路面设计.................................................33

8.4水泥混凝土路面结构设计.......................................36

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