基路面工程.doc

摘要 平蓟路因为道路等级低，且年久失修，承载能力差，交通运行环境已不能满足日益增多的交通量的要求，严重制约当地经济发展，对原有道路改建很有必要。本毕业设计主要内容就是平蓟路改建设计。 该设计通过对原有道路等级、交通量（轴载）、道路损坏情况进行分析,核心内容包括平面线形设计、纵断面设计、横断面设计、路面结构设计、附属设施设计(支护挡墙设计)等。平面设计应按照相关规范，结合已知资料初拟线形，并优化得到；纵断面设计也需按照规范，对坡长坡度及竖曲线进行设计；横断面设计是指横断要素的确定及路面超高加宽设计；路面结构设计应先初拟路面结构，再用验算软件对路面结构层厚度进行验算；以上设计均需用计算机辅助设计（AutoCAD）进行成图。 这次改建设计提高了道路等级，线形得到优化，承载能力大幅提高，提升交通服务水平，对促进当地经济发展有重要意义。 关键词：平面设计 路面结构设计 横断面 纵断面 Abstract Due to the low grade road and disrepair, carrying capacity, Pingji road’s traffic environment has been unable to meet the requirements of the increasing amount of traffic, which seriously restrict the development of local economy, so it is necessary to reconstruct the original road. The main content of this graduation design is the rebuilding design of the flat road. The design through the original grade of road and traffic volume (axle load), road damage were analyzed, the core content including plane linear design, vertical section design, cross section design, pavement structure design, ancillary facilities design (retaining wall design) etc.. Graphic design should be in accordance with the relevant regulations, combined with the known data at the beginning of the proposed alignment, and optimized; longitudinal section design also need in accordance with the norms of slope gradient and slope length and vertical curve design, cross section design is refers to the transverse elements determination and pavement ultra high widening design; pavement structure design should be first proposed at the beginning of pavement structure, then the calculation software of pavement layer thickness checking; above all the design need to use Computer Aided Design (CAD) for mapping. The reconstruction design improves the road grade, not only the alignment is optimized, the carrying capacity is greatly improved, but also the transportation service level is improved, and it is important to promote the local economic development.. Keywords: plane design pavement structure design cross s