1、 I 道桥毕业设计 摘 要 本次设计主要是泉州二级公路 B 段线路进行设计，设计的内容主要包括 选线、平面设计、纵断面设计、横断面设计、超高设计、挡土墙设计、沥青 混凝土路面设计。 为了经济适用，本次设计路基宽度为 14m，土路肩 0.5m，为了保障排水， 路面路拱度 2%，土路肩为 3%。路堤处设边坡，比例 1:1.5，路堑处设边沟， 边沟坡度 1:1，高度和深度均为 0.5m，在深挖的路段另设截水沟截水沟，截 水沟坡比、高度和深度同边沟一致。路面采用沥青混凝土路面，又由于该路 路面等级高，所承受交通量较重，因此采用三层式结构，即表面层采用 4cm 厚的细粒式密集配沥青混泥土， 中面层采用
2、5cm厚中粒式密集配沥青混泥土， 下层面采用 6cm厚粗粒式密集配混泥土。 本次设计全部按照相应规范编写，平面图为手绘图，其余图均为电脑出 图。 关键词 泉州二级公路 选线 沥青混泥土 II Abstract This design is mainly quanzhou secondary roads B section routes for the design, the design of content mainly includes route, graphic design, alignment design, cross-sectional design, ultra-high d
3、esign, retaining wall design, asphalt concrete pavement design. In order to economy applicable, the design of roadbed width to 14m, dirt road shoulder 0.5 m, in order to ensure drainage, paving road arch degrees 2%, dirt road shoulder for 3%. Embankment slope, proportion in a 1-1. 5, cutting place s
4、et ditches, ditches slope 1:1, height and depth are 0.5 m, in deep dig sections another set cut ditch cut ditch, cut ditch slope, height and depth than with ditches and consistent. Pavement using of asphalt concrete pavement, and because high, we inherit road level, so the method heavier traffic in three layers, namely, type structure using intersecting 4cm thick fine-grained type of asphalt mixes clay, dense worthy of using 5cm thick layer of grain of type of asphalt mixes clay, dense match b
