8.4预应力张拉工艺 ...................................................................................................... 67 8.5 伸缩缝、支座及桥面系施工 ................................................................................. 68 8.6 施工注意事项 ......................................................................................................... 69 8.7施工工序图见附图 .................................................................................................. 70 结论 .................................................................................................................................... 71 致谢 .................................................................................................................................... 72 参考文献 ............................................................................................................................ 73

2012届土木工程（桥梁）专业毕业设计

摘 要

本设计是一座全长216米的3跨预应力混凝土连续梁桥，跨径布置为：54m+90m+54m。在设计中充分地考虑了预应力混凝土连续梁桥设计的基本理念和方法、施工的关键技术与应力和变形控制技术等。并且严格遵照设计的程序，内容包括对连续梁桥的概述、方案的初选、方案的比选、最后的评定以及对主梁内力计算、结构计算和验算、施工图设计、施工方法的选择等，在设计中，本桥拟用大跨径的连续梁的主要施工方法——悬臂现浇施工法进行施工。采用现浇这种方式，结构的整体性更好，全截面共同承受恒载和活载。在设计过程中，设计者查阅了较多关于连续梁桥的资料，参阅了一些关于在建或已建的同类桥梁的设计和施工资料。同时严格遵从交通部颁布实施的关于此类桥梁设计、施工规范，最终达到了理论与实践相结合的目的。

关键词：预应力混凝土连续梁桥，方案设计，施工组织设计，平衡悬臂施工

衡炼?龙开口永久交通桥设计

ABSTRACT

The design is a three-span pre-stressed continuous girder bridge.It is 216 meters long.The span is 54 meters+90 meters +54 meters。 In this design ,it contains the conception of the pre-stressed continuous girder bridge the main technology about construction prestressed control and deformation control.It also contains the comparison of projects, the inherent strIIess,the calculation of structure; the design of construction drawings、the selection of construction method and so on. In this design ,this bridge will build by the main construction method of the long-span continuous girder bridge----cantilever construction method and the supporting construction method.For cast-in-place construction the griders and slab are generally formed together.so this construction is fully composite for dead load and live load. The design also contains a lot of data about the continuous girder bridge and many rules about the construction of the bridge. It combines theory with practice.

KEY WORDS:continuous pre-stressed girder bridge,project design，construction

organization design，balanced cantilever construction

2012届土木工程（桥梁）专业毕业设计

第一章 设计基本资料

1.1设计资料

1.1.1地形

龙开口永久交通桥

1