某二级公路设计—毕业设计说明书

摘要

为了巩固我们所学的知识，并在各方面得到更进一步的提高，我们选择了敦煌至当金山口二级公路设计作为毕业设计，这是在毕业之前对自身学习状况的最后一次检查。我所选择的设计路段是从DK32+000至DK40+000 段，全长8 km，设计车速为60

km/h，路基宽度为10

m。本次设计的内容有：平面线设计、纵断面设计、横断面设计。对交通量进行了分析，查找相应技术规范，确定公路的等级以及设计需要的各种参数。平面线设计包括纸上选线、定线，圆曲线、缓和曲线参数设定，直线设计等；纵断面设计包括拉坡、竖曲线设计等，超高的设定满足了设计要求的8%之内，在竖曲线设计时，应注意行车视距和视线诱导问题即满足“平包纵”，合成坡度也要满足规范要求；横断面设计时，使行车更加舒适，为确保道路的使用年限，在路段上还做了防护和排水设计；桥涵设计包括桥梁和涵洞的形式、尺寸的设计；英文翻译。通过这次设计不但了解建设公路的各个步骤，而且也能熟练的运用Auto CAD 进行制图。

关键词：路线平面横断面纵断面桥涵

I

Abstract

The design is very important to us. Not only because this is our last assignment before graduation, but also it can enhance our ability. This graduation design is the segment of the second class road which starts from dunhuang to dangjinshankou. The road, which is 8 km from

DK32+000 to DK40+000. The design speed is 60km/h and the wide of the subgrade is 10 m. The contents for design have: The flat surface line design, vertical section design, cross section design, block the soil wall design and the engineering quantity calculations and grounds square dispensation. Has carried on the analysis to the volume of traffic, search corresponding technical specifications, highway to determine the levels

of need and the design of the parameters. The flat surface line the design includes the paper select line, settle line, a curve, the mitigation curve parameter enactment, straight line design etc.; The vertical section design includes to pull the gradient , Set extremely highly on satisfying 8% of the design request inside the vertical curve design...etc., at the vertical curve design, at the request of notice to go the car to see to be apart from to induce the problem to satisfy " a vertical curve " namely with view, synthesize the slope also want satisfy the norm; When the cross section design, considered the extremely high constitution, make go the car more comfortable, in order to insure the usage time limit of the road, still did the protection and drain the design on the road segment; The design of the bridge and culverts which include size and form; Translate an English article into Chinese. This design not only to understand the various road-building steps, but also skilled in the use of Auto CAD.

Keywords：Alignment ; Flat surface design ; Vertical section design ; Cross section design ; Road surface bridge

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目录

1 绪论 (1)

1.1 中国公路发展简介 (1)

1.1.1 公路发展历程 (1)

1.1.2 公路建设评述 (2)

1.1.3 公路建设意义 (3)

1.2 公路设计控制要素 (3)

1.2.1 已知资料 (3)

1.2.2 汽车代表车型与换算系数 (4)

1.2.3 交通量计算 (4)

1.3 公路等级的确定 (4)

1.4 设计行车速度的确定 (4)

1.5 服务水平 (4)

2 工程概况 (5)

2.1 工程简介 (5)

2.1.1 工程名称 (5)

2.1.2 设计内容 (5)

2.1.3 工程特点 (5)

2.2 设计原则 (5)

2.2.1 平面设计 (5)