毕业设计（论文）-一级公路K23+000~K25+000段的道路设计.docVIP

内 容 提 要 本毕业设计课题为某一级公路K23+000-K25+000段施工图设计。公路全长2km ,在本设计中为满足缓和曲线要求，JD4延长至k25+556，公路全长2.556km，设计时速为80km/h。路基宽24.5m。 本设计包括几何设计和结构设计。在几何设计中，又包括平面设计、纵断面设计、横断面设计。本段路线平曲线共有交点4个，平均每公里约0.785个，曲线半径最小为800m。整段路没有采用极限平曲线半径，都是简单曲线。路线最大纵坡为0.781%，在结构设计中，又包括了路基路面设计、涵洞设计、防护工程设计。本设计包括2个涵洞设置。防护工程按工程需要，只包括护坡设计。 除了几何设计和结构设计外，本设计还包括了施工图预算。 关键词：一级公路；几何设计；结构设计；施工图预算  Content Summary The subject of graduation design is a construction design for a first-class highway from K23 +000 to K25 +000 section .The road of all length is 2km , In this design to meet the requirement of transition curve, JD4extension to the k25+556, highway is full-length2.556km,the design speed is 80 km/h . and the width of roadbed is 24.5 m . The design of this secondary road includes geometric design and structural design. In geometric design , the graphic design , longitudinal design and cross-sectional design are included . There are 4 intersection of the flat curve of the road and it’s about 0.785 per km on average . The minimum of radius is 800 m. The limit of falt curve radius isn’t used , the simple curve is only used. The biggest longitudinal slope of the road is 0.781% .In structural design , roadbed and pavement design , culvert design, protection engineering design are included. The design includes 2 culverts design . According to the needs of engineering , the slope protection design is just included in the project of protection . In addition to the geometric design and structural design , the design includes the calculation of the project and construction plans of budget. Key words: First-class highway; geometric design, structural design, construction plans of budget 1 总概况 1.1 工程概况 本为某一级公路K+000~K25+000段的道路设计，路线总长00m。k25+556，公路全长2556km，本路段地形属于区，地势起伏大多为水田，路段内存在岩石较完整，多为花岗岩和玄武岩等，局部地段有淤泥质粘土，呈软塑状，给路线开挖带来了一定的困难。沿线居民区供电及工程用电，可以沿线接用。 本设计区年降水量00～100mm, 4～6月份约占全年降水量的40%，7～9月份常有伏旱或秋旱。沿线地下水，有第四纪覆盖层中的孔隙潜水及基岩裂隙水两种。据调查，孔隙潜水及红砂岩地段的基岩裂隙水水质均较好，为村民的主要饮用水源，对混凝土无侵蚀。 1.2 设计标准 1.2.1 主要技术指标 1) 公路等级：丘一级公路