怀远至昌岗二级公路毕业设计

本设计二级公路设计时速为 60km/h，全长 1017.150m。该二级公路的建成能促 进怀远至昌岗的交通发展，缩短怀远至昌岗的行车时间。能加强怀远和昌岗的经济 交流，两地的物流会更加方便，同时促进两地的经济发展。 本公路设计包括平面线形设计、纵断面设计、横断面设计、路基防护与支挡及 排水设计、路面设计、平面交叉口设计、桥梁设计、隧道设计等内容。 本公路用纬地三维道路设计系统，进行平纵横设计。根据地形及规范进行平面 线形设计，纵断面设计时，主要考虑竖曲线要素、土石方平衡以及平纵线形组合等。 横断面设计时，首先根据道路等级、设计车速确定路幅组成及尺寸，并由此进行路 基土石方的计算和调配。根据平纵横设计的指标确定路基边坡的坡率，并根据边坡 坡率和边坡土质进行边坡防护、挡土墙和排水设计。路面设计进行了沥青混凝土路 面和水泥混凝土路面设计和比选，最终确定了沥青混凝土路面材料和结构层设计。 由于 该二级公路与一条同等级的国道交叉，故设计了平面交叉口。另由于在 K0+640～K0+700 段填方量较大，故在该段设计了一座怀昌桥，该桥梁全长 60m，为 两跨预应力简支梁桥；在 K0+700～K0+880 段挖方量较大，故设计了一条 180m 的怀 昌隧道。
怀远至昌岗二级公路设计
院
系：城市建设学院
专 业 班：土木工程 1107 班 姓 学 名：XXX 号：XXXXXXXXXX
指导教师：XXX
20nd-class Highway Designment of Huaiyuan to Changgang
摘
要
1.1 设计要求........................................................................................................................ 1 1.2 路线方案........................................................................................................................ 1 1.3 路线方案的比选............................................................................................................. 3 1.4 平曲线设计...................................................................................................................................... 4 1.5 行车视距...........................................................................................................................................6 2 纵断面设计....................................................................................................................................... 6
关键词： 二级公路 平面设计 纵断面设计 横断面设计 平面交叉口
隧道
桥梁
I
Abstract
The secondary road design speed is 60km/h, total length is 1017.150m.The completion of the secondary roads can promote the development of the pregnant the traffic from huaiyuan to changgang, shorten the driving time from huaiyuan to changgang.Can improve the economic exchange gains huaiyuan and changgang hillock, cities of the logistics will be more convenient, promote the economic development of both at the same time. This highway design including horizontal alignment design, profile design, cross-sectional design, roadbed protection and drainage design, retaining wall and pavement design, plane road intersection design, bridge, tunnel, etc.
The three-dimensional road design system in highway with weft, flat vertical and horizontal design.According to the terrain and the standard for horizontal alignment design, profile design, the main consideration factors of vertical curve, the balance conditions and longitudinal linear combination etc.Cross-sectional design, first of all, according to road grade, design speed determine picture composition and size, and thus the calculation of earth work carried out and allocation.Subgrade slope can be calculated according to the design of flat vertical and horizontal slope rate, and according to the soil slope and slope of slope protection, retaining wall and drainage design.Pavement design for asphalt concrete pavement and cement concrete pavement design and comparison, finally determine the asphalt concrete pavement material design and structural layer.Due to the secondary road with a grade of national highway crossing, so the plane intersection is designed.Another because in K0+640 ~K0+700 section of the fill amount is larger, so in the segment design a bosom, huaichang bridge, the bridge span is 60m, as the two span prestressed simply supported girder bridge;In K0+700 ~ K0+880 section of the excavation amount is larger, so the design of a 180 m huaichang tunnel.
2.1 纵断面设计的指标确定及原则................................................................................................. 6 2.1.1 纵断面的设计标准规定............................................................................................................6 2.1.2 平均纵坡....................................................................................................................................... 7 2.1.3 合成坡度....................................................................................................................................... 7 2.1.4 纵断面设计原则....................................................................................... 错误！未定义书签。 2.2 竖曲线设计及参数的计算........................................................................ 错误！未定义书签。 2.2.1 竖曲线半径和长度的确定....................................................................................................... 8 2.2.2 竖曲线基本要素的计算............................................................................................................9 2.3 平纵组合设计................................................................................................................................10 2.3.1 平纵组合的设计原则.................................................................................................................7 2.3.1 平曲线与竖曲线的组合............................................................................................................ 7 3 横断面设计...................................................................................................................................... 10 3.1 路基横断面形式及参数确定.................................................................................................... 11 3.2 路基横断面设计........................................................................................................................... 11 3.3 超高计算.........................................................................................................................................12 3.4 土石方调配.....................................................................................................................................14