摘要本次设计为沿江高速公路镇江段1号桥设计，主要有上部结构设计和下部结构设计两部分组成。桥梁全长40m，设计桥面宽度为7.5m行车道+2*0.25m栏杆，无人行道设计。

本次设计按照规范要求，联系实际，综合考虑设计标准，河水水文情况和工程地质条件等因素确定桥梁类型。

上部结构主要为主梁和支座设计，主梁采用预制预应力空心板。通过作用效应计算，采用铰接板法得出横向分布影响线及最不利布载位置，估算预应力钢筋数量及布置，进行内力计算及配筋，计算承载力极限状态和正常使用极限状态以及预应力损失，然后进行持久应力状态和短暂应力状态验算。下部结构主要由盖梁、墩柱和桩基础三部分组成。桩基础设计采用钻孔灌注桩，对基础承台进行内力计算及配筋。最后根据设计内容绘制平立面图，尺寸设计图及配筋图等。

毕业论文关键词：高速公路桥设计；预应力空心板；上部结构设计；下部结构设计53195

Abstract This is the design of Zhenjiang section of Yangtze River Expressway bridge 1th, mainly has the superstructure design and substructure designs two parts of compositions. Bridge length 40m, width of 7.5M road +2*0.25m railings, no pavement design.

This design according to standard request, relation reality, overall evaluation design standard, water factor definite bridge types and so on hydrological conditions and engineering geology condition.

The superstructure is mainly the main beams and support design, the main beams uses the precast pre-stressed concrete pile spatial core. Through the action effect computation, obtains the traverse influence line with the hinge board law and most lieb does not carry the position, estimates the pre-stressed reinforcement’s quantity and arrangement, carries on the interaction between the surrounding soil and tunnel lining and reinforcing bars, calculates the supporting capacity limiting condition and normal use limiting condition as well as the losses of pre-stress, then carries on the lasting stress condition and short stress condition checking calculation. The substructure consists of capping beams, pier and pile foundation consists of three parts. The pile foundation design uses the bored pile, receives the stage to carry on the interaction between the surrounding soil and tunnel lining and reinforcing bars to the foundation. Finally draws up the even elevation according to the design content, the size design drawing and matches the muscle chart and so on.

Key Words: High-speed highway bridge design; Pre-stressed spatial core; Superstructure design; Substructure design

目  录

第一章 绪论 1

1.1设计任务 1

1.2设计标准 1

第二章 桥梁方案选比 2

2.1方案一：预应力空心板简支梁 2

2.2方案二：预应力混凝土简支T形梁桥 2

2.3方案三：预应力混凝土连续箱梁桥 3

第三章 上部结构设计 5

3.1设计资料 5

3.2构造形式及尺寸选定 6

3.3空心板毛截面几何特性计算 7

3.3.1毛截面面积 7

3.3.2毛截面重心位置 7

3.3.3空心板毛截面对其重心轴的惯矩 8 沿江高速公路镇江段1号桥设计+CAD图纸:http://www.youerw.com/gongcheng/lunwen_57267.html