油塘尾-李家二级公路初步设计.docx

桂林理工大学博文管理学院毕业设计·论文 PAGE PAGE 1 摘 要 该项目位于广西临桂地区，地处南岭南缘，东西窄，南北长，呈火炬状。北部区域群山巍峨高耸入云，南端峻岭连绵。东部的地势略低于西部，由西北向东南倾斜，形成东西向分水岭。 设计道路等级的技术是20年设计基准期和2个车道的车道数的二级公路。路基宽度10m，设计时速为60km/h。 油塘尾至李家全程二级公路基础初步设计，全长约7.9公里。 本设计中结合地形及周边环境、土石方等条件，通过两条线路方案的比选，最终确定最佳方案。 本设计是在对交通量进行分析之后，再查找相应的技术规范的，确定出公路的技术等级以及设计需要的各种参数，根据要求采用二级公路的技术指标进行设计。结合周围的地形情况进行了平面线形设计，平面线形中有七个交点。纵断面的设计中有七个变坡点，满足平纵线形组合设计中的各种要求。在横断面的设计中，确定了横断面组成及各种要素后，绘制出横断面图。 本设计中路面设计对水泥混凝土路面进行设计，主要包括结构层的拟定和设计层厚度计算。 关键词：广西临桂；二级公路；设计；路面；挡土墙 Abstract Preliminary Design of Youtangwei-Lijia Secondary Highway Student: Mr. Liao Tian-yu Teacher: Yu Wencheng Abstract: The project is located in Lingui area, Guangxi, on the southern margin of Nanling Mountains. It is narrow in East and west, long in North and south, and is torchlike. The mountains in the north are towering and the mountains in the south are continuous. The eastern part is slightly lower than the western part, and inclines from northwest to southeast, forming a westward watershed. According to the information requirements, the design standard of the project is a two-lane second-class highway with a width of 10m and a design speed of 60km/h. The preliminary design of the foundation of the second-class highway from Youtangwei to Lijia is about 7.9 kilometers in length. In this design, combined with the terrain and surrounding environment, earthwork and other conditions, through the comparison of the two line schemes, the best scheme is finally determined. After analyzing the traffic volume, this design finds out the corresponding technical specifications, determines the technical grade of the highway and various parameters needed for the design, and adopts the technical indicators of the second-class highway to design according to the requirements. The plane alignment is designed according to the surrounding terrain. There are seven intersections in the plane alignment. There are seven slope-changing points in the design of vertical section, which meet all kinds of re