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二 ○ 一 五 届 毕 业 设 计

***河连续刚构桥

学 院：公路学院 专 业：桥梁工程 姓 名： 学 号： 指导教师：

完成时间：2015.06.14

二〇一五年六月

毕业设计报告

摘 要

根据设计任务书要求，依据现行公路桥梁设计规范，综合考虑桥位的地质、地形条件，提出了独塔斜拉桥、上承式钢管混凝土拱桥和预应力混凝土连续钢构三个比选方案。按“安全、经济、适用、美观和有利于环保”的桥梁设计原则，分析了三个方案的优缺点。推荐预应力混凝土连续刚构作为设计方案。推荐方案以基本设计理论为基础，参考国内外成功的大跨连续钢构桥，拟定了95m?4?170m?95m的跨径，主梁采用1.8次抛物线变梁高的单箱单室箱主梁，桥墩为双薄壁空心墩，桥台为轻型桥台，基础为群桩基础，施工阶段采取挂篮悬臂现浇法。对推荐方案进行了结构细部尺寸拟定，对上部结构和下部结构进行了内力计算、配筋设计及控制截面强度、应力验算，变形验算等。经分析比较及验算结果表明该桥梁设计合理，符合设计任务的要求。

关键词：预应力混凝土连续刚构，钢管混凝土拱桥，斜拉桥，悬臂现浇，应力验算

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毕业设计报告

ABSTRACT

According to the design requirements, the existing design specification of highway bridge, considering the geology and terrain conditions of the bridge site, after preliminary selection, three bridge type schemas are presented, they are cable-stayed bridge, arch bridge and prestressed concrete continuous rigid frame bridge . Then comparing the advantages and disadvantages of three options comprehensively by the philosophy of bridge design as “Security, Economy, Application, Beauty and Environmental Protection”. The PC continuous rigid frame bridge is selected as the recommended scheme after the selections. This project is based on the basic theory of bridge design and take the domestic and international successful designs for example, finally chose a span combination of 95m?4?170m?95m.The depth of Single cell box girder varies as the second-degree parabola, the pier is a double thin-wall hollow pier, the abutment is light abutment, the foundation is grouped piles foundation,and the the hanging basket cantilever casting construction method. Through drawing up of structure’s dimension and then design the upper and lower part of the structure ,such as calculated the internal force of dead and living load, prestressed steel design, checking the strength and stress of control cross-section. Finally, check for live load deformation. Checked by the comparison and analysis show that the design method of calculation is correct, and the distribution of reinforcement is Reasonable, so this design meet the design requirements.

Key word: prestressed concrete continuous rigid frame bridge, double thin-wall

hollow pier , cantilever casting construction

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