大坪大桥设计[摘要]:本次设计容属桥梁初步设计，主要结合所给桥址河床断面图和桥位的地质剖面图，以与地形和水文特征等条件进行初步方案设计。本次设计的主要目的在于对道桥专业大学所学知识的检验和巩固，培育我们综合运用所学理论和实践知识，分析和解决桥梁规划，设计与施工方案等各方面问题的基本技能，进一步培育学生成为工程师必备的基本素养。我们拟定三种桥梁桥型方案，通过比较分析其各自优缺点并编制方案，拟定其细部尺寸，最后通过经济比较，最终推选最佳方案作为推举方案。[关键词]:桥梁设计 初步设计推举方案[ABSTRACT]: This design is a preliminary design of XXXXXbridge. the main bridge on the river to the sectional drawing and exemplified geological section, as well as the terrain and hydrological features and other conditions for preliminary scheme design. The main purpose of this design is the knowledge of the bridge professional university inspection and consolidated, cultivate our integrated applying learning theory and practice knowledge, analyze and solve bridge planning, design and construction scheme and so on various aspects of the basic skills of the students become engineers, which further develop the essential quality. We develop three Bridges bridge plan, through comparative analysis their respective advantages and disadvantages and staffing solutions, formulate their detail size,finally through economic comparison, eventually elected optimal scheme as the recommended plan.[Keywords]bridge preliminary design the best pro一、XXX大桥初步设计说明书1、工程概况 本设计系 XXXXXXXX 大学 XXX 级道桥专业毕业设计之桥梁设计。其主要容为根据设计任务书的要求进行给定某桥梁的初步设计：先进行桥型方案设计，然后通过对各方案在经济、技术等方面的比较，提出推举方案，最后完成文件编制工作。本设计的重点是桥型方案的设计。根据桥位地形、地质、水文等情况拟定如下 3 个方案作为比较方案：Ⅰ、预应力混凝土等截面连续梁桥：46m*5Ⅱ、预应力混凝土变截面连续刚构桥：60m+110m+60mⅢ、预应...
