For high deformation curve continuous girder bridge, the fulcrum beam high H is 3.5m, cross-beam high of middle span is 1.8m. Beam end of curve; from the internal forces distribution and the aesthetic point of view, we choose the second parabolic curve as the curve of the end of the beam. We select 8 cm thick waterproof concrete as pavement layer and 5 cm layer of asphalt concrete wear as deck pavement. 12bored piles with the diameter of 1.5m is used in Bridge pier foundation. The height of Cap is 2.5. In order to alleviate water impact on the pier cap, the edge of two caps is arc-like. 

The structure is pided into 140 elements.The computer program is used to calculate the dead and live load and the internal force of all construction period,then proceed the articulation to the inner force.Which can meet the request of the criteria. 

【Key words】 Continuous Beam Bridge;Cantilever Construction; Prestress. 

1 序言1

2设计资料..3

2.1工程概况3

2.2设计规范和标准3

2.3设计技术标准..3

2.3.1设计荷载.3

2.3.2设计车速.3

2.3.4桥面横向布置3

2.3.5桥面坡度.4

2.3.6结构抗震.4

2.3.7规划河道断面图.4

2.4基本资料4

2.4.1工程地质.4

2.4.2场地水文地质条件..6

3桥梁结构的总体布置和初步方案拟定7

3.1方案一：简支梁桥.7

3.1.1设计思路.7

3.1.2跨径划分和总体布置7

3.1.3上部主要结构尺寸拟定.8

3.1.4 下部主要结构尺寸拟定.8

3.1.5标高计算.8

3.1.6施工方案.9

3.2方案二：T形钢构桥9

3.2.1设计思路.9

3.2.2跨径划分和总体布置9

3.2.3上部主要结构尺寸拟定.10

3.2.4下部主要结构尺寸拟定.10

3.2.5标高计算.10

3.2.6施工方案.10

3.3方案三：预应力混凝土连续梁桥.11

3.3.1设计思路.11

3.3.2跨径划分和总体布置11

3.3.3上部主要结构尺寸拟定.11

3.2.4下部主要结构尺寸拟定.12

3.3.5标高计算.12

3.3.6施工方案.12

4方案比选..13

5主要材料及桥梁整体布置主要材料及桥梁整体布置

5.1主要材料16

5.1.1混凝土16

5.1.2预应力钢索和普通钢筋.16

5.2总体布置16

5.2.1桥梁平面布置16

5.2.2上部结构.17

5.2.3下部结构.18

6恒载及附加荷载计算.19

6.1恒载使用程序..19

6.1.1程序说明.19

6.1.2计算模型.19

6.1.3计算内容.19

7活载内力计算.27

7.1汽车活载计算..27

7.2人群荷载计算..28

8内力组合..29

8.1内力组合说明..29

8.1.1承载能力极限状态组合.29

8.1.2正常使用状态内力组合.30

8.2内力组合31

9配筋计算及预应力束布置33

9.1预应力钢束的估算.33

9.2预应力束的布置40

9.2.1布置原则.40

9.2.2钢束的立面、平面布置.41

9.2.3钢束断面布置41

9.3预应力钢束数量统计..41

10施工过程分析及应力验算..44

10.1施工阶段划分.44

10.2施工阶段应力分析45

10.3施工阶段应力验算48

11正常使用极限状态应力验算50

11.1规范要求..50

11.2应力验算..52

12梁正截面强度验算..55

12.1验算截面的选取..55

12.2边跨弯矩最大处正截面强度验算55

12.3跨中正截面强度验算.59

13斜截面强度验算.61

13.1验算截面的选取

13.2边跨弯矩最大处斜截面强度验算61

13.2主墩支点斜截面强度验算63