1、 I 摘 要 本毕业设计题目为西藏加查至桑日公路第十三合同段，道路位于雅鲁藏布江流域。 路线区域内主要为山岭区，地形起伏较大，设计车速 60km/h。设计通过两个方案的比选 来确定较佳路线，两个路线全长大概都在三千五百米左右，所选方案二路线全长 3544.654m，双向两车道，路基宽 10m，路面宽 7m。所选沥青路面设计年限 12 年。 设计包括三个部分，内容如下：第一部分公路线形设计，在本部分，通过认真仔细 的研究，结合实际情况，综合考虑了路线填挖平衡、平曲线的优化、平曲线与竖曲线组 合原则等，确保了设计线形的优化，然后根据两个比选方案的技术经济指标，对方案进 行比选， 从中确定较合理的方
2、案第二方案作为推荐方案。 第二部分为路基工程设计， 包括支挡工程设计等。第三部分为路面工程设计，选择沥青混凝土路面和水泥混凝土路 面分别进行了设计，并对两个方案进行比选，选定沥青混凝土路面为推荐方案, 整个排 水系统由边沟、排水沟组成。相关的图纸、表格附后。 关键词： 路线平面线形； 纵断面设计； 横断面设计； 重力式挡土墙； 路面设计 Abstract II The design is the tenth contract section from Qachas to Mulberry Day in Tibet, and the road is located in the Brahmapu
3、tra river basin . In the route region, there is mainly mountain ridge area, and the hypsography is series, so the design speed is 60km/h. The better route is determined through comparing of two program in the design. The length both are probably about 3，500 meters, and the selected program is 3544.6
4、54m, two two-way lanes, and the widen of the roadbed is 10m,7m of the pavement. Asphalt cement concrete pavement is designed for twelve years. The design includes three parts, as follows : The road technical road linear design: In this part, through careful review, in light of the actual situation,
5、the author considering the balance of excavation, the optimization of plane curve, the combination of plane curve and vertical curve, to ensure that the design of linear optimization. Then a more reasonable program - the second program are recommended through comparing the two program according to t
6、he technical economic indicator. The second part is the roadbed engineering design, which includ retaining engineering design and so on. Part three is pavement design, and the concrete pavement and asphalt cement concrete pavement both are considered and designed competely in the design, asphalt concrete pavement is recommended for the program, the whole drainage system is formed as side ditches, drainage ditch and pipe culvert. Related to the drawings, forms attached. Key words ： Route pl
