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某山区二级公路(I段)
摘要:
本设计为某山区重岭区二级公路常规设计。该公路段设计的主要内容有:道路路
线方案的拟定与比较、道路等级的确定、道路平纵横断面线形设计、路基路面
设计、道路排水设计、小桥涵和挡土墙设计、工程数量计算、施工组织设计等。该设计先选择多种道路路线方案,根据地形线形、路线长度、工程数量、工程造价、农田占用等主要经济指标和技术指标,既要考虑规范、标准,又要考虑自然、道路总体规划、社会经济发展等因素,从而确定合理的路线方案。然后严格依据道路规范、标准对道路平、纵、横断面各要素进行设计。接着进行路基路面的设计与验算,最后进行涵洞、挡土墙、排水系统等相关构筑物设计。
关键词:
道路线形设计 路基 路面 涵洞 挡土墙
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Abstract:
The design for a secondary road mountain re-Ling conventional design.The
main section of the highway design elements include: alignment and comparison of program development, road grade, and road level linear vertical and horizontal cross section design, Pavement design, road drainage design, small bridges and culverts and retaining wall design, engineering quantity calculations, constructionorganizational design.The design first select a variety of road alignment options, according to the terrain alignment, line length, number of projects, project cost, farmland occupation and other major economic indicators and technical indicators, it is necessary to consider the norms, standards, and also consider the nature, road master plan, communityeconomic development and other factors to determine a reasonable line of the program.And then strictly in accordance with the road specifications and standards on the road flat, vertical, cross-sectional design elements.Followed by Pavement design and checking, and finally to culverts, retaining walls, drainage systems design and related structures.
Keyword:
Road Alignment Design Subgrade Pavement Culvert Retaining wall
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目 录
中文摘要 .............................................................. 1 英文摘要 .............................................................. 2 第一章 引言 ........................................................... 7
1.1课题背景 ....................................................... 7 1.2我国公路现状 ................................................... 8 1.3我国公路发展规划及其发展趋势 ................................... 8
1.3.1发展规划 ................................................. 8 1.3.2发展趋势 ................................................. 8 1.4设计背景 ....................................................... 9 第二章 总说明 ......................................................... 9
2.1 设计要求和参考资料 ........................................... 10 2.2道路等级的确定 ................................................ 10 第三章 技术标准的确定 ................................................ 11
3.1道路平面指标确定 .............................................. 11
3.1.1直线 .................................................... 11 3.1.2圆曲线 .................................................. 12 3.2道路纵断面指标确定 ............................................ 13
3.2.1纵坡 .................................................... 13 3.2.2坡长 .................................................... 13 3.2.3 平均纵坡 ............................................... 14 3.2.4 合成纵坡 ............................................... 14 3.2.5 竖曲线 ................................................. 14 3.2.6 行车视距及保证 ......................................... 14 3.3道路横断面指标的确定 .......................................... 15
3.3.1路基设计的基本要求 ...................................... 15 3.3.2路面设计 ................................................ 16 3.3.2.1路面等级 .............................................. 17 3.4桥涵指标确定 .................................................. 18 第四章 道路路线的选择 ............................................... 18
4.1平面选线 ...................................................... 18
4.1.1道路选线的一般原则 ...................................... 18 4.1.2公路着重论证因素 ........................................ 18 4.1.3选线步骤与思路 .......................................... 18 4.2路线方案对比 .................................................. 19 第五章 道路平面设计 .................................................. 20
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5.1平面线形设计原则 .............................................. 20 5.2平面线形设计计算 .............................................. 22
5.2.1计算公式 ................................................ 22 5.2.2交点计算 ................................................ 23
第六章 道路纵断面设计 ................................................ 27
6.1纵断面设计的一般原则 .......................................... 27 6.2纵断面设计方法 ................................................ 27 6.3指标检查 ...................................................... 28 6.4竖曲线设计 .................................................... 28
6.4.1竖曲线要素计算公式: .................................... 28 6.4.2竖曲线设计计算 .......................................... 29 6.5平纵曲线组合 .................................................. 30 第七章 道路横断面设计 ................................................ 31
7.1 行车道与路肩 ................................................. 31
7.1.1行车道的设计 ............................................ 31 7.1.2路肩设计 ................................................ 32 7.2横断面组成 .................................................... 32 7.3路面加宽 ...................................................... 32 7.4 超高计算 ..................................................... 33
7.4.1确定一些基本的参数 ...................................... 33 7.4.2超高与加宽 .............................. 错误!未定义书签。 7.5土石方计算 .................................................... 37
7.5.1土石方数量计算 .......................................... 37 7.5.2路基土石方调配 .......................................... 37 7.6平纵曲线组合 .................................................. 39 第八章 路基设计 ...................................................... 40
8.1 路基设计要求及内容 ........................................... 40
8.1.1 路基设计要求 ........................................... 40 8.1.2 路基设计的内容 ......................................... 41 8.2 路基横断面设计 ............................................... 41
8.2.1路基宽度 ................................................ 41 8.2.2路基高度 ................................................ 41 8.2.3路基边坡 ................................................ 41 8.3 路基填料及压实标准 .......................................... 42
8.3.1路基填料的要求 .......................................... 42 8.3.2压实标准的的要求 ........................................ 43 8.3.3填方路基的设计 .......................................... 43 8.3.4挖方路基的设计 .......................................... 43 8.4边沟及截水沟的设置 ............................................ 44
8.4.1边沟的设置 .............................................. 44 8.4.2截水沟的设置 ............................................ 44 8.5 路基防护 ..................................................... 45 8.6 路基排水设计 ................................................. 45
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