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1、山东交通学院2015届毕业生毕业设计设 计 书题目： 滨德高速430m装配式预应力混凝土简支T梁桥施工图设计专 业： 土木工程 班 级： 土木 学 号： 姓 名： 指导教师： 完成日期： 2015 年 6 月 摘 要 预应力混凝土梁式桥在我国桥梁建筑上占我重要的地位，在目前，对于中小跨径的 永久性桥梁，无论是公路桥梁或者城市桥梁，都在尽量采用预应力混凝土梁式桥，因为 这种桥梁具有就地取材，工业化施工，耐久性好，适应性强，整体性好以及美观等多种优点。 本设计采用装配式简支 T 梁结构，其上部结构由主梁、横隔梁、行车道板，桥面部 分和支座等组成，显然主梁是桥梁的主要承重构件。其主梁通过横梁和行车道
2、板连接成 为整体，使车辆荷载在各主梁之间有良好的横向分布。桥面部分包括桥面铺装、伸缩装 置和栏杆等组成，这些构造虽然不是桥梁的主要承重构件，但它们的设计与施工直接关 系到桥梁整体的功能与安全，这里在本设计中也给予了详细的说明。本设计主要受跨中正弯矩的控制，当跨径增大时，跨中由恒载和活载产生的弯矩将 急剧增加，是材料的强度大部分为结构重力所消耗，因而限制的起跨越能力，本设计采 用 27m 标准跨径，合理地解决了这一问题。在设计中通过主梁内力计算、应力钢筋的布 置、主梁截面强度与应力验算、行车道板及支座、墩台等等设计，完美地构造了一座装 配式预应力混凝土简支 T 梁桥，所验算完全符合要求，所用方法
3、均与新规范相对应。本 设计重点突出了预应力在桥梁中的应用，这也正体现了我国桥梁的发展趋势。 关键词：预应力，简支 T 梁，后张法，应力验算Abstract The prestressed concrete beam plate bridge occupies my important status in our country bridge construction, in at present, regarding small span permanent bridge, regardless of is the highway bridge or the city bridge, all
4、as far as possible is using the prestressed concrete beam plate bridge, because this kind of bridge has makes use of local materials, the industrialization construction, the durability is good, compatible, integrity good as well asartistic and so on many kinds of merits. This design uses assembly ty
5、pe simple support T beam structure, its superstructure by the king post, septum transversum beam, the lane board, the bridge floor part and the support and so on is composed, the obvious king post is the bridge main carrier. Its king post connects into the whole through the crossbeam and the lane bo
6、ard, enable the vehicles load to have the good traverse between various king posts .Bridge floor part including compositions and so on flooring, expansion and contraction installment and parapet, these structures although is not the bridge main carrier, but their design and the construction relates
7、the bridge whole directly the function and the security, here has also given the detailed explanation in this design. This design mainly steps the sagging moment control, when the span increases, cross the bending moment which produces by the dead load and the live load the sharp growth, is the mate
8、rial intensity majority of consumes for the structure gravity, thus limits the spanning ability, this design uses the 27m standard span, has solved this problem reasonably. In the design through the king post endogenic force computation, the stress steel bar arrangement, king post section intensity
9、and stress checking calculation, lane board and support, pillar Taiwan and so on designs, a structure assembly type prestressed concrete simple support T beam bridge, the checking calculation completely has conformed to the requirement perfectly, uses the method and the new standard corresponds. Thi
10、s design has highlighted the pre-stressed with emphasis in the bridge application, this has also been manifesting our country bridge trend of development. Key word: Pre-stressed， Simple support T beam，Tensioning，Stress checking calculation 目 录前言.1第 1 章.桥梁设计基本资料.11.1 滨德高速 K72+943.5 中桥工程地质资料.11.1.1 气候
11、条件.11.1.2 地质资料.21.2 设计规范.3第 2 章桥型设计方案.52.1 方案一：预应力钢筋混凝土简支梁（锥型锚具）.52.1.1 基本构造布置.52.1.2 设计荷载.52.2 方案二：钢筋混凝土箱形拱桥.62.2.1 方案简介.62.2.2 尺寸拟定.62.2.3 桥面铺装及纵横坡度.72.2.4 施工方法.72.2.5 总结.7第 3 章上部结构设计.83.1 设计资料及结构布置.83.1.1 设计资料.83.1.2 横截面布置.83.1.3 横截面沿跨长变化.113.1.4 横隔梁的布置.113.2 主梁作用效应计算.113.2.1 恒载内力计算.113.2.2 活载内力计算.133.2.3 计算横向分布系数.133.2.4计算最大弯矩和最大剪力.
