设计说明书终稿

长 安 大 学

Changan University

二○一一届专科毕业设计

题 目： 广西某一级公路设计

院 系

长安大学继续教育学院

班 级 0915 学 号 26 姓 名 张三 指 导 教 师 朱玉美 所 属 站 点 江苏省交通技师学院

二○一一年十二月

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摘 要

本设计为广西省境内新建公路某段的初步设计。根据设计要求公路的交通量统计和计算数据及其使用任务和性质，公路等级确定为一级公路。广西省地处中国东部、黄河下游，路线所经地形为山地丘陵区。结合当地自然状况及规范规定，进行线路平面设计、纵断面设计、路基设计以及横断面设计。设计最终资料包括平纵横、路基设计及土石方设计图表。本线全线总长1821.241m。有1个平曲线、4个竖曲线、设计车速100km/h，路基宽度12m。本设计中主要运用了纬地5.88公路选线设计软件进行相应各项的设计。 关键词：路线设计，路基路面 ，排水，土石方

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Abstract

The design is a preliminary design of certain partial of a new way which located in Guangxi province. According to the statistical and calculated date about the traffic of the designing way, the level for the road is determined highway. Guangxi province located in east China and Yellow River downstream. Route through the hilly area. Combined with the local natural condition and the rules and regulations, do plane design, longitudinal design, roadbed design and cross-sectional design. The eventually design material including plane, longitudinal, cross-sectional, roadbed designing charts and earthwork designing charts. A total length of the route is 1821.241 meters. There are 1 horizontal curve and 4 vertical curve in the route. The lane design at 100 Km per hour, and the width of subgrade is 12 meters. The main software used in the design following: Hint CAD 5.88 to highway route design software. Key Words: linear design, subgrade, pavement, drainage, earthwork designing

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目 录

第一章 设计任务 ....................................................................................................... 1 1.1工程概况 ............................................................................................................... 1 1.2 设计依据及主要设计标准 .................................................................................. 1 第二章 沿线自然条件 ............................................................................................... 2 2.1 水文地质条件 ...................................................................................................... 2 2.1.1 气候 ........................................................................................................... 2 2.1.2 降水量及地下水埋深 ............................................................................... 2 2.2 交通量预测 .......................................................................................................... 2 2.3 方案的确定比选 .................................................................................................. 4 2.3.1 选线原则 ................................................................................................... 4 2.3.2 方案比选 ................................................................................................... 5 第三章 平曲线设计 ................................................................................................... 7 3.1曲线要素计算 ....................................................................................................... 7 3.1.1 转角的确定 ............................................................................................... 7 3.1.2 圆曲线、缓和曲线长度的确定 ............................................................... 7 3.1.3 具体曲线要素计算 ................................................................................... 9 3.1.4 主点桩号的确定 ..................................................................................... 10 3.2 超高与加宽设计 ................................................................................................ 11 3.2.1平曲线上的加宽 ...................................................................................... 11 3.2.2 超高计算 ................................................................................................. 11 第四章 纵断面设计 ................................................................................................. 14 4.1 纵断面线形设计的一般原则与要求 ................................................................ 14 4.2 纵坡及坡长设计 ................................................................................................ 15 4.2.1 最大纵坡 ................................................................................................. 15 4.2.2 最小纵坡 ................................................................................................. 15 4.2.3 坡长限制 ................................................................................................. 15 4.2.4 合成坡度 ................................................................................................. 17 4.3 道路平纵线形组合设计 .................................................................................... 17

4.3.1 平、纵组合的设计原则 ......................................................................... 17 4.3.2 平、竖组合的设计原则 ......................................................................... 18 4.3.3 相邻竖曲线的衔接 ................................................................................. 18

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4.4竖曲线 ................................................................................................................. 18 4.4.1竖曲线设计限制因素 .............................................................................. 19 4.4.2 竖曲线要素计算 ..................................................................................... 20 第五章 横断面设计 ................................................................................................. 22 5.1 横断面设计的基本要求 .................................................................................... 22 5.2 道路横断面组成 ................................................................................................ 22 5.2.1 车道宽度的确定 ..................................................................................... 23 5.2.2 中间带宽度的确定 ................................................................................. 23 5.2.3 硬路肩 ..................................................................................................... 24 5.2.4 路缘带 ..................................................................................................... 25 5.2.5 土路肩 ..................................................................................................... 25 5.3 路基土石方计算与调配 .................................................................................... 26 5.3.1 基本公式 ................................................................................................. 26 5.3.2 调配的原则 ............................................................................................. 27 5.3.3 土石方调配要求 ..................................................................................... 27 5.3.4 调配方法 ................................................................................................. 28 第六章 路基设计 ..................................................................................................... 30 6.1 路基设计的一般要求 ........................................................................................ 30 6.2 路基的基本构造与设计 .................................................................................... 31 6.2.1 路基宽度的确定 ..................................................................................... 31 6.2.2 路基高度 ................................................................................................. 32 6.2.3 路基边坡坡度 ......................................................................................... 33 6.3 路基附属设施 .................................................................................................... 35 6.3.1 取土坑与弃土堆 ..................................................................................... 35 6.3.2 护坡道与碎落台 ..................................................................................... 36 第七章 路面设计 ..................................................................................................... 37 7.1 路面的功能和对路面的要求 ............................................................................ 37 7.2 路面结构层次划分 ............................................................................................ 38 7.3 路面类型选择 .................................................................................................... 40 7.4路面结构设计 ..................................................................................................... 41

7.4.1 轴载分析 ................................................................................................. 42 7.4.2 结构组合与材料选取 ............................................................................. 45 7.4.3 拟定路面结构组合方案 ......................................................................... 46

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