【土木】襄樊汉江三桥南引桥施工图设计K27+340.000~K27+666.000

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土木 襄樊 汉江 三桥南 引桥 施工图 设计 k27
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摘要

本设计为襄樊汉江三桥南引桥施工图设计。设计过程如下:

首先,根据设计任务要求,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,经初选后提出了变截面预应力混凝土连续梁桥、预应力混凝土简支 T 梁桥、双

飞燕式系杆拱桥,等截面预应力混凝土连续梁桥。遵循“安全、适用、经济、美观”的

桥梁设计原则,比较四个方案的优缺点,把 63+100+100+63 变截面预应力混凝土连续梁

桥作为主推荐方案。

其次,确定主梁主要构造及细部尺寸。设计采用单箱双室箱形截面,用悬臂浇筑法

施工。

然后,利用桥梁博士电算软件进行内力计算及组合,估算和布置预应力钢筋。

最后,进行强度及变形验算,并绘制施工图。经分析比较及验算表明该设计计算方

法正确,内力分布合理,符合设计任务的要求。

关键词:施工图设计;方案比选;变截面预应力混凝土连续梁桥;验算

襄樊汉江三桥南引桥施工图设计

THE CONSTRUCTION CONSTRUCTION CONSTRUCTION CONSTRUCTION DESIGN OF Xiangfan Xiangfan Xiangfan Xiangfan hanjiang hanjiang hanjiang hanjiang

NO.3BRIDGE

ABSTRACT ABSTRACT ABSTRACT ABSTRACT

This design for xiangfan hanjiang three bridge construction drawing design south approach. The

design process is as follows:

First, according to the requirements on design task current highway bridge design specifications,

considering the geological and topographical conditions siting, put forward by primary cross-section after

prestressed concrete continuous girder bridge, prestressed concrete simply-supported T bridge, double

feyenoord, section bowstring arch type of prestressed concrete continuous girder bridge. Follow the "safety,

applicability, economy, beautiful bridge design principle, the" comparative advantages and disadvantages

of the three schemes, 63 + 100 + 100 + 63 cross-section of prestressed concrete continuous girder bridge as

the main recommendations.

Secondly, determine the main girder structure and details of the size. A single box with double rooms

is choosed as the cross-section shape. And the construction method of the bridge is moving die carrier

cast-in-place span-by-span.

Thirdly, calculate and combine the internal force, estimate and arrange the prestressed reinforcement

by using Doctor Bridge software. Finally, check strength and deformation, and draw construction drafts. The comparative analysis and

calculation shows that the calculation method is right and the distribution of the internal force is reasonable,

according with the requirements of the design.

Key words: construction design; scheme comparison; unequal cross-section prestressed concrete

continuous beam bridge; checking computation目录

1 设计说明.................................................................................................................................1

1.1 概况...............................................................................................................................1

1.2 主要技术标准...............................................................................................................1

1.3 主要材料.......................................................................................................................1

1.4 桥面铺装.......................................................................................................................2

1.5 施工方式.......................................................................................................................2

1.6 温度影响.......................................................................................................................2

1.7 支座强迫位移...............................................................................................................2

1.8 设计规范.......................................................................................................................2

2 设计方案.................................................................................................................................4

2.1 方案比选原则...............................................................................................................4

2.2 备选方案介绍...............................................................................................................4

3 内力计算...............................................................................................................................12

4 预应力钢束估算及布置.......................................................................................................56

5 预应力损失及有效预应力计算...........................................................................................63

6 强度计算与验算...................................................................................................................68

6.1 应力验算......................................................................................................................68

6.1.1 正应力验算........................................................................................................68

6.1.2 使用阶段主应力验算........................................................................................69

6.2 强度验算......................................................................................................................81

7 主梁变形(挠度)计算.......................................................................................................90

7.1 边跨验算......................................................................................................................90

7.2 中跨验算.....................................................................................................................90

8 施工图设计...........................................................................................................................91

8.1 概述.............................................................................................................................91

8.2 桥型布置图.................................................................................................................91

8.3 主梁一般构造图.........................................................................................................91

8.4 主梁预应力钢筋图.....................................................................................................92

参考文献...................................................................................................................................93

致 谢...................................................................................................................................94

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