1、I 摘摘 要要 混凝土简支 T 形梁桥由于其具有外形简单，制造方便，结构受力合理， 主梁高跨比小，横向借助横隔梁联结，结构整体性好，桥梁下部结构尺寸 小和桥型美观等优点，目前在公路桥梁工程中应用非常广泛。 在本次设计中，首先进行了桥型方案的比选，确定简支梁桥方案后，就 其进行了结构设计，设计的主要内容有：拟定截面尺寸；计算控制截面的 设计内力及其相应的组合值；行车道板计算，主梁裂缝、挠度及预拱度计 算等。接着进行了简单的施工方法设计，包括施工前的准备，主要分项工 程的施工方法设计，冬季和雨季的施工安排以及施工过程中的环境保护措 施等。 关键词： T 形梁，方案比选，结构设计，施工方法 II A
2、bstract Concrete T-shaped girder bridges are of many advantages. They have simple outlines and can be fabricated easily. The forces that act on their structures are reasonable. The ratio of height of girders to span of girders is small. In landscape orientation the girders are connected by intersect
3、ing girders. Therefore the whole structure is of good entirety. And there are still many other merits, such as small size of infrastructure, the beauty of this type of bridge and so on. Because of these advantages the PC T-shaped girder bridges are now widely applied in highway bridge projects. In t
4、he process of the design of the bridge, the comparison of different types of bridge is done firstly. After the comfirmation of the type of the bridge, the design of the structure is done, including confirming the size of cross sections, calculating the design forces of restraining sections and combi
5、ning them according to The Criterion, deck calculation, deflection and crack, main girder camber calculation. After all the work, next is the design of construction method. It includes the preparation before construction, the design of construction method of small projects, the arrangements of const
6、ruction in the rainy season and in winter, the measurements of protecting environment in the process of construction. Key Words: T-shaped girder; comparion of different schemes，the design of the structure，construction method I 目录目录 1 编制方案的原则与比选编制方案的原则与比选 . （1） 1.1 基本原则 （1） 1.2 比选依据 （1） 1.3 简支梁桥方案 （1） 1.4 连续梁桥方案 （1） 1.5 方案比较 （1） 2 设计资料及构造布置设计资料及构造布置 . （3） 2.1 设计资料 （3） 2.1.1 桥梁跨径及桥宽 .（3） 2.1.2 设计荷载 .（3） 2.1.3 材料及工艺 .（3） 2.1.4 设计依据 .（3） 2.2 横截面布置 （4） 2.2.1 主梁间距和主梁片数 .（4） 2.2.2 主梁跨中截面尺寸拟定 .（4） 2
