公路毕业设计

湖南科技大学潇湘学院本科生毕业设计（论文）

摘 要

本设计为邵阳至怀化一级公路K0+000至K2+060段的初步设计。主要内容包括：平面设计、纵断面设计、横断面设计、路基设计、挡土墙设计、公路排水及防护工程、路面结构设计。在设计过程中参阅了相关文献资料，并严格按照规范标准设计。线形设计部分，充分考虑了地形地质、安全、环保、土地利用、施工条件及经济等因素；纵断面设计根据道路等级、沿线自然条件和构造物控制标高等确定路线合适的标高、各坡段的纵坡度和坡长，并设计竖曲线；在横断面设计部分综合考虑公路等级、行车要求、自然地质条件、施工方法，兼顾当地农田建设，保证路基的稳定和排水，来作出正确的设计。在路基设计部分选择合理的路堤填料与压实标准；在挡土墙设计部分，采用了重力式挡土墙，倾斜基底，充分考虑了挡土墙的经济性和安全性；在公路排水及防护工程部分充分考虑到当地地质状况，以及美化环境、改善景观和舒缓驾驶人员视觉疲劳等因素，对该路段部分边坡采用草皮护坡以及窗式护面墙等进行防护；在路面结构设计部分，根据设计要求和实地情况选用了沥青混凝土路面。

关键词：平纵横设计；路基设计；挡土墙设计；路面设计

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湖南科技大学潇湘学院本科生毕业设计（论文）

ABSTRACT

This design studies the way from Shaoyao to Huaihua which covers K0 + 000 ~ K2 + 057.52, including: graphic design, alignment design, cross-sectional design, roadbed design, retaining wall design, road drainage as well as protective engineering and pavement structure design. The design is in strict accordance with the code standard and consults related references. The factors of topography, geology, safety, environmental protection, land use, construction condition and economics were taken into consideration in linear desin; in the lignment design, according to the road grade, natural conditions and control elevation of structure, the design determines the appropriate elevation, the longitudinal slope and slope length of each slope section, and designs vertical curve; in the part of cross-sectional design, the design considers highway grade, driving requirements, natural geological condition, the construction method, and local farmland construction in order to guarantee the stability of roadbed and drainage. In the roadbed design part we should select reasonable embankment packing and compacted standards; in the part of retaining wall design, the designer uses a gravity retaining wall and sloping base and the economy and safety of retaining wall are taken in account; in the design of highway drainage and protective engineering, in view of the factors of local geology condition, landscaping, landscape improvement and relieving of visual fatigue of drivers, the design uses grass sod as well as facingwall of window-type to protect part of the side slope; in the part of pavement structure design, according to the design requirements and local conditions, the design selects bituminous concrete pavement.

Keywords: flat freely design; subgrade design; retaining wall design; pavement design

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湖南科技大学潇湘学院本科生毕业设计（论文）

目 录

第一章 设计概况 ................................................... - 1 -

1.1 工程概况 ..................................................... - 1 -

1.1.1 路线走向、起讫点 ....................................... - 1 - 1.1.2 地形、地质、气候、水文等自然地理特征 ................... - 1 -

第二章 线形设计 ................................................... - 3 -

2.1 线形设计一般原则 .............................................. - 3 - 2.2 平面线形要素的组合类型 ........................................ - 3 - 2.3 选线 .......................................................... - 3 -

2.3.1选线的一般原则 .......................................... - 3 - 2.3.2选线的步骤 .............................................. - 4 - 2.3.3路线方案比选 ............................................ - 4 - 2.4 本路段线形设计情况 ............................................ - 5 - 2.5 确定平面设计技术指标 .......................................... - 5 - 2.5.1圆曲线 .................................................. - 5 - 2.5.2缓和曲线 ................................................ - 5 - 2.6 平曲线要素计算 ................................................ - 5 - 2.6.1平曲线计算 .............................................. - 6 -

2.6.2平曲线要素计算结果表 .................................... - 5 -

第三章 路线纵断面设计 ........................................... - 10 -

3.1 概述 ........................................................ - 10 - 3.2 纵坡及坡长设计 .............................................. - 10 -

3.1.1 纵断面设计要求 ......................................... - 10 - 3.2.2纵断面具体规范规定如下： ............................... - 11 - 3.2.3 纵坡设计步骤 ........................................... - 12 - 3.2.4 竖曲线 ................................................. - 13 -

第四章 横断面设计 ................................................. - 18 -

4.1 横断面设计 ................................................... - 18 -

4.1.1横断面设计原则 ......................................... - 18 - 4.1.1 路基宽度 ............................................... - 18 - 4.1.2 路肩 ................................................... - 19 -

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湖南科技大学潇湘学院本科生毕业设计（论文）

4.1.3横断面设计步骤 ......................................... - 20 - 4.2 路拱、超高及加宽设计 ......................................... - 20 -

4.2.1路拱 ................................................... - 20 - 4.2.2超高 ................................................... - 21 - 4.2.3加宽的计算 ............................................. - 21 -

第五章 边坡稳定性分析 ........................................... - 22 -

5.1 设计资料 ..................................................... - 22 - 5.2 路堤边坡稳定性分析 ........................................... - 22 - 5.3 路堑边坡稳定性分析 ........................................... - 22 -

第六章 路基设计 ................................................... - 24 -

6.1 路基路面设计的一般规定 ....................................... - 24 - 6.2 路基设计内容 ................................................. - 24 -

6.2.1 路基横断面布置及宽度设计 ............................... - 24 - 6.2.2 路基压实 ............................................... - 24 - 6.3 路基施工一般规定 ............................................. - 25 -

6.3.1 填方路基的施工 ......................................... - 26 - 6.3.2 挖方路基的施工 ......................................... - 27 - 6.4路基排水设计 ................................................. - 27 -

6.4.1路基排水设计一般原则 ................................... - 27 - 6.4.2 路基排水设备构造与布置 ................................. - 27 - 6.5挡土墙设计与计算 ............................................. - 28 -

6.5.1挡土墙的作用及适用范围 ................................. - 28 - 6.5.2挡土墙的设计原则 ....................................... - 29 - 6.5.3挡土墙计算 ............................................. - 29 - 6.5.4挡土墙排水 ............................................. - 31 - 6.6 土石方计算和调配 ............................................. - 32 -

6.6.1 横断面面积计算 ......................................... - 32 - 6.6.2 路基土石方调配 ......................................... - 32 -

6.7 边坡防护工程 ................................................. - 33 -

6.7.1 植物防护 ............................................... - 33 - 6.7.2 工程防护 ............................................... - 34 -

第七章 路面设计 ................................................... - 36 -

7.1 路面结构分层 ................................................. - 36 -

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