明湖东桥桥梁设计

论文总字数：23833字

摘 要

论文作者签名：＿＿＿＿＿导师签名：＿＿＿＿日期：＿＿＿＿

国道325线改建工程明湖东桥设计分析

学号：21713104 学生姓名：李玉发 指导教师：吴文清 职称：教授

摘要

国道325线改建工程明湖东桥上部采用3X16m预应力混凝土空心板桥，桥面连续，下部的桥墩采用柱式桥墩与钻孔灌注桩基础，桥台则采用肋板式桥台与钻孔灌注桩基础。本桥位于半径为213m圆曲线和直线段内，墩台平行布置。上部结构体系是简支结构，按先张法部分预应力A类构件进行设计。桥面现浇层参与结构受力，空心板顶板计算按单向板和悬臂板计算。下部结构设计要点：墩台盖梁按连续梁计算，墩台水平力按各自刚度分配；桩基内力按“m法”计算。根据现场调查，结合地勘资料，本标段桥梁按处于一般环境（无冻融、盐、酸、碱等作用）下设计。结构设计基准期为100年，设计基准内，应对桥梁支座等部件进行定期检查，必要时进行更换，预计板式橡胶支座使用寿命为30年。

为了全面锻炼本科生的桥梁工程专业知识综合应用能力，满足对本科实践锻炼的需要，现要求对该桥上、下部结构进行结构验算分析。

关键词：明湖东桥；改建工程；分析

Design and analysis of Ming Lake East Bridge

of national highway 325 line reconstruction project

Student number: 21713104 Student Name: Yufa Li

Tutor: Wenqing Wu Title: Professor

Abstract

325 national highway reconstruction project of Lake East Bridge Upper adopts 3X16m prestressed concrete hollow slab bridge, continuous bridge deck, the lower part of the pier of the column piers and bored pile foundation abutment with ribbed slab abutment and bored pile foundation. The bridge is located in the circle of radius 213M curve and straight line segment, pier parallel arrangement. The upper structure system is simply supported structure, which is designed according to pre tensioning method, partial prestress and class a component. The cast in place of the bridge floor is involved in the structural force, and the calculation of the hollow slab roof is calculated by the one-way plate and the cantilever plate. The lower part of the structure design points: bent beam calculated by continuous beam, horizontal force of pier according to their stiffness distribution; internal force of pile is calculated by M method. According to site investigation and geological survey data, the bridge under the general conditions (no freezing, thawing, salt, acid, alkali, etc.) is designed. Structural design reference period is 100 years, the design basis should be bridge, bearings and other components for regular inspection, when necessary replacement, rubber plate is expected to support the service life of 30 years.

In order to fully train undergraduate students' ability of comprehensive application of bridge engineering knowledge and meet the needs of undergraduate practice exercise, structural checking computations of upper and lower structures of the bridge are required.

Key words: Ming Lake East Bridge; reconstruction project; analysis

目 录

第一章 上部结构验算 1

1.1 设计资料 1

1.1.1 工程介绍 1

1.1.2 设计规范 1

1.1.3 材料参数 1

1.1.4 桥梁主要结构图示 2

1.1.5 截面几何特性计算 3

1.2 作用效应计算 5

1.2.1 永久作用效应计算 5

1.2.2 基本可变作用效应计算 5

1.2.3 冲击系数μ的计算 5

1.2.4 基本可变作用横向分布系数 6

1.2.5 车道荷载效应计算 7

1.2.6 作用效应组合 10

1.3 换算截面几何特性计算 11

1.4 承载能力极限状态计算 13

1.4.1 跨中截面正截面抗弯承载力计算 13

1.4.2 斜截面抗剪承载力计算 14

1.5 预应力损失计算 16

1.6 正常使用极限状态计算 20

1.6.1 正截面抗裂性验算 20

1.6.2 正常使用阶段的挠度计算 23

第二章 桥梁下部结构及基础计算 24

2.1 下部结构及基础布置 24

2.2 盖梁计算 25

2.2.1 荷载计算 25

2.2.2 内力计算 31

2.2.3 截面配筋设计与承载力校核 34

2.3 桥墩墩柱验算 36

2.3.1 荷载计算 36

2.3.2 截面配筋设计及应力验算 37

2.4 钻孔桩计算 39

2.4.1 荷载计算 39

2.4.2 桩的内力计算（法） 41

2.4.3 桩身截面配筋与承载力验算 44

2.4.4 墩顶纵向水平位移验算 45

参考文献： 47

致谢 48

剩余内容已隐藏，请支付后下载全文，论文总字数：23833字