论文总字数：26345字

摘 要

近几十年以来，因为我国科学技术、生产能力的提高，桥梁建筑技术迅猛发展。今天我们就来谈谈现代桥梁类型中的一个重要组成部分——连续刚构桥。本篇论文主要结合裕溪河特大桥跨锥三河段来浅谈连续刚构桥。

裕溪河特大桥位于安徽省巢湖市境内。该项目分为三个标段，每个标段为不同的桥型。其中本篇论文所着重介绍的连续刚构桥体系为锥三河段。裕溪河特大桥的建设有利于安微巢湖交通经济的发展。该大桥全长4866.1m，规模大，结构复杂。

锥河大桥为41.5 70 41.5m的变截面预应力混凝土连续刚构桥，初步设计采用40 70 40m连续梁结构，施设考虑桥墩高度约26m，桥宽为16.75m，进行优化采用连续刚构，减少支座维护，优化主梁受力。主梁为单箱双室箱形截面，采用悬臂浇筑法施工。

采用连续刚构体系的优点如下：

1、锥三河初步设计采用连续梁结构，充分考虑地区的性质，可以在保证工程质量的前提下，加快工程建设进度、方便施工、降低造价。

2、连续梁结构是一种安全、实用、综合造价低又美观的结构形式，做到了技术可行、经济合理。

3、严格按照设计规范和依据保质保量地完成，并尽量做到标准化、系列化和机械化。

关键词：裕溪河特大桥；锥三河；连续刚构桥；悬臂浇筑法；预应力混凝土连续梁

Abstract

In recent decades, because of science and technology to improve production capacity, the rapid development of bridge construction technology. Today we"ll talk about the types of modern bridge is an important part - continuous frame bridge. This paper mainly with Yuxi River Bridge across the river to the three cone of continuous rigid frame bridge.

With the rapid development of our country highway enterprise, China"s highway bridge construction by leaps and bounds, long-span Bridges, especially long-span prestressed concrete continuous beam, continuous rigid frame has been widely used in the major rivers in China. This paper mainly combines yu river three river extra-large bridge across cone to discuss continuous rigid frame bridge.

North along the highway is the anhui province been eight horizontal "cross" six "in the highway network. The project starting point and the highway along the Yangtze river north ma on shan to the end point of section chaohu, set the chaohu hub interchanges connect us nest called high speed; End point in tower bridge have T hub interchanges connect planning of tongling Yangtze river iron bridge road connection. This project is one of the important traffic channel of the Yangtze river north shore, wan jiang region is an important part of overall development. To wan jiang city belt undertake industrial transfer demonstration area, promote the rise of central China, implement the development strategy of anhui province east to, build a harmonious society, is of great significance for building a well-off society in an all-round way and function.

Cone river bridge 41.5 70 41.5 m of variable cross section of prestressed concrete continuous rigid frame bridge, preliminary design USES 40 70 40 m continuous beam structure, facilities consider about 26 m height of piers, bridge width is 16.75 m, is optimized using continuous rigid frame, reducing bearing maintenance, optimization of girder. Main girder of box section for single box double room, construction by the cantilever method.

Using the advantages of continuous rigid frame system is as follows:

1, taper sanhe continuous beam structure is used in the preliminary design, fully consider character of the area can be on the premise of guarantee the project quality, speed up the construction progress, convenient construction, lower cost.

2, the structure of the continuous beam is a safe, practical and beautiful structure, low comprehensive cost and form, do the feasible technology, reasonable economy.

3, in strict accordance with the design specification and basis to complete with good quality, and try to achieve the standardization, seriation and mechanization.

Key words: yulin river bridge; Sanhe cone; Continuous rigid frame bridge; The cantilever method; Prestressed concrete continuous beam

目录

摘要 II

Abstract III

第一章 绪论 6

1.1前言 6

1.2连续刚构桥的发展现状 6

1.2.1国内发展现状 6

1.2.2国外发展现状 7

1.3大跨径连续刚构的发展趋势 8

第二章 连续刚构桥的特点 9

2.1连续刚构桥的优点 10

2.2连续刚构桥的缺点 10

第三章 连续刚构桥的施工 11

3.1连续刚构桥的施工方法 11

3.1.1混凝土的浇筑与养生 11

3.1.2预应力钢筋张拉时的混凝土强度 12

3.1.3立模标高的确定 12

3.1.4跨中合拢段施工中应注意的问题 12

3.2连续刚构桥梁的施工监测与控制 13

3.3连续刚构梁桥主要病害及原因分析 13

3.3.1材料方面的原因 14

3.3.2施工方面的原因 14

3.4连续刚构桥合龙段施工技术 14

第四章 悬臂浇筑 16

4.1悬臂浇筑法的适用范围及特点 16

4.1.1悬臂浇筑法的适用范围 16

4.1.2悬臂浇筑法施工特点 16

4.2悬浇箱梁施工方案 16

4.2.1施工方案概述 16

4.2.2临时固结施工方案 16

第五章 结语 18

Chapter V Conclusion 20

谢辞 23

Acknowledgments 24

参考文献 25

第一章 绪论

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