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摘 要

本设计为宁江至善门一级公路第一标段初步设计（K0+000.00-K1+535.842）路段的初步设计。设计时速为80m/h，设计年限为15年。

说明书中包括线路线的平、纵、横设计、路基设计、挡土墙设计、边坡防护设计、路基路面排水设计、路面设计，主要参考文献等。

结合已知资料和文献，在整个过程中按照各相关的规范标准进行设计。在线形设计阶段中，遵循选线原则对路线方案做深入、细致的研究，做到尽量少占农田，并与周围环境相协调，尽量设计一天方便周围居民的路线。最后,从方案中选择一条符合设计要求、经济合理的最优方案。本选线避开了高压线的拆迁和低路线以致占用过多的农田。在线形设计部分，综合考虑了平曲线的优化及平曲线与竖曲线的“平包竖”组合力求达到优化设计。对于挡土墙，则是采用极限状态分项系数法来设计。本设计路面采用沥青混凝土路面。

关键词：一级公路；平纵横设计；路堤挡土墙； 路面设计。

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ABSTRACT

This design is a series of bid to First class road in ningjiang, the first preliminary design (K0+000.00-K1+535.842) sections of the preliminary design. Design speed of 80 km/h, fixed number of year for 15 years.

Instructions are included in the line of flat, vertical, horizontal design, roadbed design, retaining wall design, slope protection design, roadbed drainage design and pavement design, the main references, etc.

Combined with the known data and documents, according to the standard of the relevant standards in the whole process to carry on the design. In the stage of the geometric design, follow the principle of line selection of route schemes to do in-depth and meticulous research, to do as little as possible of farmland, and in harmony with the surrounding environment, try to design a day convenient route of surrounding residents. Finally, from the scheme choosing a comply with the design requirements, the economic and reasonable optimal solutions. This avoids the high tension line to select the demolition and low route that takes up too much of the farmland. In the linear part design, considering the optimization of plane curve and plane curve and vertical curve \\\the retaining wall, is the limit state subentry coefficient method is used to design. The design of pavement with asphalt concrete pavement.

Key words: First class road；Flat vertical and horizontal design; Embankment retaining

wall;Pavement design.

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目 录

前言·················································································································· 1 第一章 总体说明 ······························································································ 1

1.1项目概况 ·································································································· 1 1.2设计总说明 ······························································································· 1 1.3主要技术经济指标 ······················································································ 2

第二章 道路平面设计 ······················································································· 3

2.1道路选线 ·································································································· 3 2.2路线方案比较 ···························································································· 3 2.3本路段线形设计情况 ··················································································· 4 2.4道路平面设计图 ························································································· 5 2.5行车视距保证 ···························································································· 5 2.6逐桩坐标 ·································································································· 6 2.6.1直线上中桩坐标计算 ············································································ 6 2.6.2设缓和曲线单曲线中桩坐标计算 ····························································· 7

第三章 道路纵断面设计 ··················································································· 9

3.1纵断面设计 ······························································································· 9 3.2设计依据 ·································································································· 9 3.3道路纵断面设计图 ···················································································· 10 3.4竖曲线要素计算 ······················································································· 10 3.5纵坡及竖曲线表 ······················································································· 11

第四章 道路横断面设计 ················································································· 12

4.1设计概况 ································································································ 12 4.2路基宽度 ································································································ 12 4.3土石方的计算与调配 ················································································· 12 4.4路基横断面图 ·························································································· 13

第五章 路基 ··································································································· 14

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