【土木】枫树坡桥施工图设计

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土木 枫树 施工图 设计
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摘要

枫树坡桥施工图设计,遵照“安全、适用、经济、美观”的基本原则,同时充分考虑

了建设技术的先进性以及环境保护和可持续发展的要求。主桥为等截面预应力钢筋混凝

土空心板连续梁桥,桥梁跨径100m。桥面宽度为0.5m(防撞栏)+净-11.75m(行车道)

+0.5m(防撞栏)=12.75m,三车道。该桥采用施工简单的先简支后连续的施工方案。本

设计主要对枫树坡桥进行了桥型方案比选、上部结构计算、成桥内力计算及荷载组合、

主要结构的配筋计算、正截面与斜截面验算以及施工图的绘制。

关键词:预应力;等截面;空心板梁桥;先简支后连续;设计;验算

枫树坡桥施工图设计

THE CONSTRUCTION DETAIL DESIGN OF FENG SHU PO

BRIDGE

ABSTRACT

Feng Shu Po Bridge is designed and calculated according to the principles of safety,

applicability, economy and esthetics, together with the standards of the advanced building

techniques, the environmental protection and the sustainable development. The main bridge is

reinforced concrete hollow slab bridge. The full length of the bridge is 100m.The width of the

bridge floor is 12.75m, with the net width of 11.75m plus the width of the two guards against

hits the guard rail of. 0.5m.The bridge has three lanes.The bridge is constructed with the

simple technology of first simply-supported and after continuous configuration. The design of

the Feng Shu Po bridge includes designing and selecting the scheme of the type of the bridge,

first simply-supported and after continuous configuration system and checking, bridge

internal force calculation and load combination ,the major parts’force calculation after

combining with steels ; inclide section and normal section checking.

Key words: reinforce; reinforced concrete hollow slab bridge; first simply-supported and

after continuous metod; designing; checking computation

枫树坡桥施工图设计

目录

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

1.1 主要技术指标...............................................................................................................1

1.2 材料规格.......................................................................................................................1

1.3 设计规范.......................................................................................................................1

1.4 施工方式.......................................................................................................................2

2 设计方案.................................................................................................................................3

2.1 方案比选原则...............................................................................................................3

2.2 比选方案介绍...............................................................................................................3

2.3 上部尺寸拟定...............................................................................................................7

2.3.1 顺桥向尺寸拟定.................................................................................................7

2.3.2 横桥向尺寸拟定.................................................................................................7

3 上部结构计算.......................................................................................................................10

3.1 截面几何特性计算.....................................................................................................10

3.2 结构离散及截面定义.................................................................................................10

3.3 施工阶段划分.............................................................................................................11

3.4 永久作用计算.............................................................................................................12

3.4.1 一期恒载内力...................................................................................................12

3.4.2 二期恒载内力...................................................................................................13

3.4.3 恒载内力图.......................................................................................................16

3.5 可变作用效应计算.....................................................................................................17

3.5.1 冲击系数和横向分布系数...............................................................................17

3.5.2 连续梁桥影响线...............................................................................................20

3.5.3 活载内力计算...................................................................................................22

3.5.4 汽车荷载包络图...............................................................................................23

3.6 温差内力及基础沉降内力计算.................................................................................24

3.6.1 温差内力计算...................................................................................................24

3.6.2 支座沉降作用效应计算...................................................................................27

枫树坡桥施工图设计

3.7 作用效应组合.............................................................................................................29

3.7.1 承载能力极限状态作用效应组合...................................................................29

3.7.2 正常使用阶段极限状态作用效应组合...........................................................32

4 预应力钢束的估算与布置...................................................................................................38

4.1 预应力筋估算.............................................................................................................38

4.2 预应力筋估算结果.....................................................................................................39

4.3 预应力束布置情况.....................................................................................................44

4.4 预应力损失计算.........................................................................................................46

4.5 配束后主梁内力荷载组合.........................................................................................50

5 验算.......................................................................................................................................61

5.1 正截面强度验算.........................................................................................................61

5.1.1 使用阶段正截面抗弯验算...............................................................................61

5.1.2 使用阶段斜截面抗剪验算...............................................................................63

5.2 抗裂验算.....................................................................................................................66

5.2.1 正截面抗裂验算...............................................................................................66

5.2.2 斜截面抗裂验算...............................................................................................69

5.3 持久状况构件的应力验算.........................................................................................71

5.3.1 正截面混凝土压应力验算...............................................................................71

5.3.2 斜截面混凝土主压应力验算...........................................................................74

5.3.3 预应力筋拉应力验算.......................................................................................75

5.4 短暂状态应力验算.....................................................................................................76

6 挠度验算及预拱度设置.....................................................................................................80

6.1 挠度验算.....................................................................................................................80

6.2 预拱度的设置.............................................................................................................81

7 施工图绘制...........................................................................................................................82

7.1 概述.............................................................................................................................82

7.2 总体布置图.................................................................................................................82

7.3 空心板一般构造图.....................................................................................................82

7.4 空心板预应力钢束构造图.........................................................................................82

8 设计总结...............................................................................................................................83

枫树坡桥施工图设计

参考文献...................................................................................................................................84

致谢...........................................................................................................................................86

附件:开题报告

附件:译文及原文影印件

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