二级公路初步设计说明书

摘 要

古碑至金寨二级公路起、终点桩号为K0+000.000～K4+767.051 ，全长4.767公里。金寨县位于东经115°22′19″～116°11′52″与北纬31°06′41″～31°48′51″之间，地处安徽省西部。年均气温14.6℃，海拔60～400米，最高气温33℃，最低气温－1℃。年均降水量为1150mm。充分调查地形、地质、水文、人口等。然后从交通量分析入手，计算确定公路交通等级，设计速度为60km/h。接着依次进行道路线形设计、平面设计、纵断面设计、横断面设计，其中路基宽度10m，车道宽度3.50m，硬路肩宽度0.750m，土路肩宽度0.75m，硬路肩横坡2.00%，土路肩横坡3.00%，路拱横坡2.00%。为了满足排水、路基稳定等要求，还进行了圆涵洞设计、边坡稳定性分析、重力式挡土墙设计、沥青混凝土路面和水泥混凝土设计、排水设计、防护工程设计。最后编制了工程预算，本项目总造价为1309.5260万元。

关键词：二级公路设计；平、纵、横断面；边坡稳定性；

沥青混凝土路面；水泥混凝土路面；工程预算

ABSTRACT

GuBei to JinZhai secondary roads, pile end for K0 + 000.000 ~ K4 + 000.000,

4.767 km. Jin Zhaixian 22 '19 "is located in east longitude 115 ° ~ 116 °

52' 11"

and latitude 31 ° ~ 31 °

48 '06' 41 "51", located in the west of anhui province.

Annual average temperature 14.6 ℃, 60 ~ 400 meters above sea level, the

highest

temperature is 33 ℃, the lowest temperature 1 ℃. Average annual rainfall of 1150

mm. Fully survey topography, geology, hydrology, population, etc. Then, from

the

perspective of the traffic flow analysis, calculate and determine the highway

traffic

level, design speed of 60 km/h. Then in turn to road alignment design, graphic design,

profile design, cross-sectional design, roadbed width of 10 m, lane width 3.50 m, the

hard shoulder width 0.750 m, dirt road shoulder width 0.75 m, 2.00% hard shoulder

horizontal slope, road shoulder horizontal slope 3.00%, hump cross slope of 2.00%.

Finally the preparation of project budget, the project total cost of 1309.5260 million.

Keyword:secondary road design; Flat, longitudinal and transverse section;

Slope

stability;Asphalt concrete pavement; Cement concrete pavement;

Project

budget

目 录

第一章 绪论 ··································································· 1

1.1公路等级选用的基本原则 ············································ 1

1.2公路设计控制要素 ····················································· 1

第二章 总体设计 ····························································· 3

2.1基本要求 ································································· 3

2.2设计要点 ································································· 3

2.3其他相关技术标准 ····················································· 4

第三章 平面设计 ····························································· 5

3.1选线 ······································································· 5

3.2路线方案比选 ··························································· 7

3.3平面设计 ································································· 8

第四章 纵断面设计 ······················································· 13

4.1纵断面设计原则 ······················································ 13

4.2纵断面设计一般规定 ················································ 13

4.3竖曲线 ·································································· 14

4.4平、纵线形组合设计 ················································ 16

第五章 横断面设计 ······················································· 17

5.1横断面设计基本要求 ················································ 17

5.2横断面设计步骤 ······················································ 17

5.3路拱 ····································································· 18

5.4加宽 ····································································· 18

5.5超高 ····································································· 18

第六章 一般路基设计 ···················································· 20

6.1路基典型横断面形式 ················································ 20

6.2路基设计要求 ························································· 20

6.3路基防护 ······························································· 20

第七章 涵洞设计 ··························································· 22

7.1概述 ····································································· 22

7.2小桥涵的分类 ························································· 22

7.3圆管涵 ·································································· 22

7.4暗板涵 ·································································· 23

7.5涵洞计算书 ···························································· 24

第八章 边坡稳定性分析 ················································· 26

8.1边坡稳定性分析依据 ················································ 26

8.2边坡稳定性分析方法 ················································ 26

8.3边坡稳定性分析计算书 ············································· 26

第九章 挡土墙设计 ······················································· 31

9.1挡土墙作用 ···························································· 31

9.2挡土墙设置 ···························································· 31

9.3挡土墙验算 ···························································· 31

9.4设计指标 ······························································· 31

9.5挡土墙设计计算书 ··················································· 32